feat(dep-graph): use xstate for state management (#7634)

.gitignore

@@ -11,3 +11,4 @@ tmp
 jest.debug.config.js
 .tool-versions
 /.verdaccio/build/local-registry
+dep-graph/dep-graph/src/assets/environment.js

dep-graph/dep-graph-e2e/project.json

@@ -8,7 +8,8 @@
       "options": {
         "cypressConfig": "dep-graph/dep-graph-e2e/cypress.json",
         "tsConfig": "dep-graph/dep-graph-e2e/tsconfig.e2e.json",
-        "devServerTarget": "dep-graph-dep-graph:serve"
+        "devServerTarget": "dep-graph-dep-graph:serve-for-e2e",
+        "baseUrl": "http://localhost:4200"
       }
     },
     "e2e-watch-disabled": {
@@ -16,7 +17,8 @@
       "options": {
         "cypressConfig": "dep-graph/dep-graph-e2e/cypress-watch-mode.json",
         "tsConfig": "dep-graph/dep-graph-e2e/tsconfig.e2e.json",
-        "devServerTarget": "dep-graph-dep-graph:serve:watch"
+        "devServerTarget": "dep-graph-dep-graph:serve-for-e2e:watch",
+        "baseUrl": "http://localhost:4200"
       }
     },
     "lint": {

dep-graph/dep-graph-e2e/src/integration/app.spec.ts

@@ -12,7 +12,12 @@ import {
 
 describe('dep-graph-client', () => {
   beforeEach(() => {
+    cy.intercept('/assets/graphs/*').as('getGraph');
+
     cy.visit('/');
+
+    // wait for first graph to finish loading
+    cy.wait('@getGraph');
   });
 
   it('should display message to select projects', () => {
@@ -51,12 +56,12 @@ describe('dep-graph-client', () => {
 
   describe('selecting projects', () => {
     it('should select a project by clicking on the project name', () => {
-      // cy.get('[data-project="nx-dev"]').should('have.data', 'active', false);
+      cy.get('[data-project="nx-dev"]').should('have.data', 'active', false);
-      cy.get('[data-project="nx-dev"]')
+      cy.get('[data-project="nx-dev"]').click({
-        .click({
+        force: true,
-          force: true,
+      });
-        })
+
-        .should('have.data', 'active', true);
+      cy.get('[data-project="nx-dev"]').should('have.data', 'active', true);
     });
 
     it('should deselect a project by clicking on the project name again', () => {

dep-graph/dep-graph/project.json

@@ -32,39 +32,16 @@
       },
       "configurations": {
         "dev": {
-          "fileReplacements": [
+          "fileReplacements": [],
-            {
-              "replace": "dep-graph/dep-graph/src/environments/environment.ts",
-              "with": "dep-graph/dep-graph/src/environments/environment.dev.ts"
-            }
-          ],
           "assets": [
             "dep-graph/dep-graph/src/favicon.ico",
-            "dep-graph/dep-graph/src/assets"
+            "dep-graph/dep-graph/src/assets/graphs/",
-          ],
-          "optimization": false,
-          "outputHashing": "none",
-          "sourceMap": true,
-          "extractCss": true,
-          "namedChunks": false,
-          "extractLicenses": false,
-          "vendorChunk": true,
-          "budgets": [
             {
-              "type": "initial",
+              "input": "dep-graph/dep-graph/src/assets",
-              "maximumWarning": "2mb",
+              "output": "/",
-              "maximumError": "5mb"
+              "glob": "environment.js"
-            }
-          ]
-        },
-        "watch": {
-          "fileReplacements": [
-            {
-              "replace": "dep-graph/dep-graph/src/environments/environment.ts",
-              "with": "dep-graph/dep-graph/src/environments/environment.watch.ts"
             }
           ],
-          "assets": [],
           "optimization": false,
           "outputHashing": "none",
           "sourceMap": true,
@@ -83,15 +60,10 @@
       },
       "outputs": ["{options.outputPath}"]
     },
-    "serve": {
+    "serve-base": {
       "executor": "@nrwl/web:dev-server",
       "options": {
         "buildTarget": "dep-graph-dep-graph:build-base:dev"
-      },
-      "configurations": {
-        "watch": {
-          "buildTarget": "dep-graph-dep-graph:build-base:watch"
-        }
       }
     },
     "lint": {
@@ -112,6 +84,44 @@
         "jestConfig": "dep-graph/dep-graph/jest.config.js",
         "passWithNoTests": true
       }
+    },
+    "serve": {
+      "executor": "@nrwl/workspace:run-commands",
+      "outputs": [],
+      "options": {
+        "commands": [
+          "npx ts-node -P ./scripts/tsconfig.scripts.json ./scripts/copy-dep-graph-environment.ts dev",
+          "nx serve-base dep-graph-dep-graph"
+        ]
+      },
+      "configurations": {
+        "watch": {
+          "commands": [
+            "npx ts-node -P ./scripts/tsconfig.scripts.json ./scripts/copy-dep-graph-environment.ts watch",
+            "nx serve-base dep-graph-dep-graph"
+          ]
+        }
+      }
+    },
+    "serve-for-e2e": {
+      "executor": "@nrwl/workspace:run-commands",
+      "outputs": [],
+      "options": {
+        "commands": [
+          "npx ts-node -P ./scripts/tsconfig.scripts.json ./scripts/copy-dep-graph-environment.ts dev",
+          "nx serve-base dep-graph-dep-graph"
+        ],
+        "readyWhen": "No issues found."
+      },
+      "configurations": {
+        "watch": {
+          "commands": [
+            "npx ts-node -P ./scripts/tsconfig.scripts.json ./scripts/copy-dep-graph-environment.ts watch",
+            "nx serve-base dep-graph-dep-graph"
+          ],
+          "readyWhen": "No issues found."
+        }
+      }
     }
   },
   "tags": ["core"]

dep-graph/dep-graph/src/app/app.ts

@@ -1,31 +1,38 @@
 // nx-ignore-next-line
 import type { DepGraphClientResponse } from '@nrwl/workspace/src/command-line/dep-graph';
-import { ProjectGraph } from '@nrwl/devkit';
+import { fromEvent } from 'rxjs';
-import { combineLatest, fromEvent, Subject } from 'rxjs';
+import { startWith } from 'rxjs/operators';
-import { startWith, takeUntil } from 'rxjs/operators';
 import { DebuggerPanel } from './debugger-panel';
 import { GraphComponent } from './graph';
-import { AppConfig, DEFAULT_CONFIG } from './models';
+import { useDepGraphService } from './machines/dep-graph.service';
+import { DepGraphSend } from './machines/interfaces';
+import { AppConfig, DEFAULT_CONFIG, ProjectGraphService } from './models';
 import { GraphTooltipService } from './tooltip-service';
 import { SidebarComponent } from './ui-sidebar/sidebar';
 
 export class AppComponent {
-  private sidebar: SidebarComponent;
+  private sidebar = new SidebarComponent();
   private tooltipService = new GraphTooltipService();
   private graph = new GraphComponent(this.tooltipService);
   private debuggerPanel: DebuggerPanel;
 
   private windowResize$ = fromEvent(window, 'resize').pipe(startWith({}));
-  private render$ = new Subject<{ newProjects: string[] }>();
 
-  constructor(private config: AppConfig = DEFAULT_CONFIG) {
+  private send: DepGraphSend;
-    this.render$.subscribe((nextRenderConfig) => this.render(nextRenderConfig));
+
+  constructor(
+    private config: AppConfig = DEFAULT_CONFIG,
+    private projectGraphService: ProjectGraphService
+  ) {
+    const [_, send] = useDepGraphService();
+    this.send = send;
 
     this.loadProjectGraph(config.defaultProjectGraph);
+    this.render();
 
     if (window.watch === true) {
       setInterval(
-        () => this.loadProjectGraph(config.defaultProjectGraph),
+        () => this.updateProjectGraph(config.defaultProjectGraph),
         5000
       );
     }
@@ -37,39 +44,49 @@ export class AppComponent {
     );
 
     const project: DepGraphClientResponse =
-      await this.config.projectGraphService.getProjectGraph(projectInfo.url);
+      await this.projectGraphService.getProjectGraph(projectInfo.url);
 
     const workspaceLayout = project?.layout;
 
-    const nodes = Object.values(project.projects).reduce((acc, cur: any) => {
+    this.send({
-      acc[cur.name] = cur;
+      type: 'initGraph',
-      return acc;
+      projects: project.projects,
-    }, {});
-
-    const newProjects = !!window.graph
-      ? project.changes.added.filter(
-          (addedProject) => !window.graph.nodes[addedProject]
-        )
-      : project.changes.added;
-
-    window.projects = project.projects;
-    window.graph = <ProjectGraph>{
       dependencies: project.dependencies,
-      nodes: nodes,
+      affectedProjects: project.affected,
-    };
+      workspaceLayout: workspaceLayout,
-    window.focusedProject = null;
+    });
-    window.projectGraphList = this.config.projectGraphs;
-    window.selectedProjectGraph = projectGraphId;
-    window.workspaceLayout = workspaceLayout;
 
-    if (this.sidebar) {
+    if (!!window.focusedProject) {
-      this.render$.next({ newProjects });
+      this.send({
-    } else {
+        type: 'focusProject',
-      this.render$.next();
+        projectName: window.focusedProject,
+      });
+    }
+
+    if (window.groupByFolder) {
+      this.send({
+        type: 'setGroupByFolder',
+        groupByFolder: window.groupByFolder,
+      });
     }
   }
 
-  private render(renderConfig: { newProjects: string[] } | undefined) {
+  private async updateProjectGraph(projectGraphId: string) {
+    const projectInfo = this.config.projectGraphs.find(
+      (graph) => graph.id === projectGraphId
+    );
+
+    const project: DepGraphClientResponse =
+      await this.projectGraphService.getProjectGraph(projectInfo.url);
+
+    this.send({
+      type: 'updateGraph',
+      projects: project.projects,
+      dependencies: project.dependencies,
+    });
+  }
+
+  private render() {
     const debuggerPanelContainer = document.getElementById('debugger-panel');
 
     if (this.config.showDebugger) {
@@ -78,59 +95,17 @@ export class AppComponent {
 
       this.debuggerPanel = new DebuggerPanel(
         debuggerPanelContainer,
-        window.projectGraphList
+        this.config.projectGraphs,
+        this.config.defaultProjectGraph
       );
 
       this.debuggerPanel.selectProject$.subscribe((id) => {
         this.loadProjectGraph(id);
-        this.sidebar.resetSidebarVisibility();
-      });
-    }
-
-    this.graph.projectGraph = window.graph;
-    const affectedProjects = window.affected;
-
-    this.graph.affectedProjects = affectedProjects;
-
-    if (!this.sidebar) {
-      this.sidebar = new SidebarComponent(affectedProjects);
-    } else {
-      this.sidebar.projects = window.projects;
-
-      if (renderConfig?.newProjects.length > 0) {
-        this.sidebar.selectProjects(renderConfig.newProjects);
-      }
-    }
-
-    combineLatest([
-      this.sidebar.selectedProjectsChanged$,
-      this.sidebar.groupByFolderChanged$,
-      this.windowResize$,
-    ])
-      .pipe(takeUntil(this.render$))
-      .subscribe(([selectedProjectNames, groupByFolder]) => {
-        const selectedProjects = [];
-
-        selectedProjectNames.forEach((projectName) => {
-          if (window.graph.nodes[projectName]) {
-            selectedProjects.push(window.graph.nodes[projectName]);
-          }
-        });
-
-        if (selectedProjects.length === 0) {
-          document.getElementById('no-projects-chosen').style.display = 'flex';
-        } else {
-          document.getElementById('no-projects-chosen').style.display = 'none';
-          this.graph.render(selectedProjects, groupByFolder);
-        }
       });
 
-    if (this.debuggerPanel) {
+      this.graph.renderTimes$.subscribe(
-      this.graph.renderTimes$
+        (renderTime) => (this.debuggerPanel.renderTime = renderTime)
-        .pipe(takeUntil(this.render$))
+      );
-        .subscribe(
-          (renderTime) => (this.debuggerPanel.renderTime = renderTime)
-        );
     }
   }
 }

dep-graph/dep-graph/src/app/debugger-panel.ts

@@ -16,7 +16,8 @@ export class DebuggerPanel {
 
   constructor(
     private container: HTMLElement,
-    private projectGraphs: ProjectGraphList[]
+    private projectGraphs: ProjectGraphList[],
+    private initialSelectedGraph: string
   ) {
     this.render();
   }
@@ -40,7 +41,7 @@ export class DebuggerPanel {
       select.appendChild(option);
     });
 
-    select.value = window.selectedProjectGraph;
+    select.value = this.initialSelectedGraph;
     select.dataset['cy'] = 'project-select';
 
     select.onchange = (event) =>

dep-graph/dep-graph/src/app/graph.ts

@@ -1,9 +1,15 @@
-import type { ProjectGraph, ProjectGraphNode } from '@nrwl/devkit';
+import type {
+  ProjectGraph,
+  ProjectGraphDependency,
+  ProjectGraphNode,
+} from '@nrwl/devkit';
+import type { VirtualElement } from '@popperjs/core';
 import * as cy from 'cytoscape';
 import cytoscapeDagre from 'cytoscape-dagre';
 import popper from 'cytoscape-popper';
 import { Subject } from 'rxjs';
 import type { Instance } from 'tippy.js';
+import { useDepGraphService } from './machines/dep-graph.service';
 import { ProjectNodeToolTip } from './project-node-tooltip';
 import { edgeStyles, nodeStyles } from './styles-graph';
 import { GraphTooltipService } from './tooltip-service';
@@ -13,7 +19,6 @@ import {
   ProjectEdge,
   ProjectNode,
 } from './util-cytoscape';
-import type { VirtualElement } from '@popperjs/core';
 
 export interface GraphPerfReport {
   renderTime: number;
@@ -24,22 +29,57 @@ export class GraphComponent {
   private graph: cy.Core;
   private openTooltip: Instance = null;
 
-  affectedProjects: string[];
-  projectGraph: ProjectGraph;
-
   private renderTimesSubject = new Subject<GraphPerfReport>();
   renderTimes$ = this.renderTimesSubject.asObservable();
 
+  private send;
   constructor(private tooltipService: GraphTooltipService) {
     cy.use(cytoscapeDagre);
     cy.use(popper);
+
+    const [state$, send] = useDepGraphService();
+    this.send = send;
+
+    state$.subscribe((state) => {
+      const projects = state.context.selectedProjects.map((projectName) =>
+        state.context.projects.find((project) => project.name === projectName)
+      );
+      this.render(
+        projects,
+        state.context.groupByFolder,
+        state.context.workspaceLayout,
+        state.context.focusedProject,
+        state.context.affectedProjects,
+        state.context.dependencies
+      );
+    });
   }
 
-  render(selectedProjects: ProjectGraphNode[], groupByFolder: boolean) {
+  render(
+    selectedProjects: ProjectGraphNode[],
+    groupByFolder: boolean,
+    workspaceLayout,
+    focusedProject: string,
+    affectedProjects: string[],
+    dependencies: Record<string, ProjectGraphDependency[]>
+  ) {
     const time = Date.now();
 
+    if (selectedProjects.length === 0) {
+      document.getElementById('no-projects-chosen').style.display = 'flex';
+    } else {
+      document.getElementById('no-projects-chosen').style.display = 'none';
+    }
+
     this.tooltipService.hideAll();
-    this.generateCytoscapeLayout(selectedProjects, groupByFolder);
+    this.generateCytoscapeLayout(
+      selectedProjects,
+      groupByFolder,
+      workspaceLayout,
+      focusedProject,
+      affectedProjects,
+      dependencies
+    );
     this.listenForProjectNodeClicks();
     this.listenForProjectNodeHovers();
 
@@ -56,9 +96,20 @@ export class GraphComponent {
 
   private generateCytoscapeLayout(
     selectedProjects: ProjectGraphNode[],
-    groupByFolder: boolean
+    groupByFolder: boolean,
+    workspaceLayout,
+    focusedProject: string,
+    affectedProjects: string[],
+    dependencies: Record<string, ProjectGraphDependency[]>
   ) {
-    const elements = this.createElements(selectedProjects, groupByFolder);
+    const elements = this.createElements(
+      selectedProjects,
+      groupByFolder,
+      workspaceLayout,
+      focusedProject,
+      affectedProjects,
+      dependencies
+    );
 
     this.graph = cy({
       container: document.getElementById('graph-container'),
@@ -84,7 +135,14 @@ export class GraphComponent {
 
   private createElements(
     selectedProjects: ProjectGraphNode[],
-    groupByFolder: boolean
+    groupByFolder: boolean,
+    workspaceLayout: {
+      appsDir: string;
+      libsDir: string;
+    },
+    focusedProject: string,
+    affectedProjects: string[],
+    dependencies: Record<string, ProjectGraphDependency[]>
   ) {
     let elements: cy.ElementDefinition[] = [];
     const filteredProjectNames = selectedProjects.map(
@@ -101,21 +159,21 @@ export class GraphComponent {
     selectedProjects.forEach((project) => {
       const workspaceRoot =
         project.type === 'app' || project.type === 'e2e'
-          ? window.workspaceLayout.appsDir
+          ? workspaceLayout.appsDir
-          : window.workspaceLayout.libsDir;
+          : workspaceLayout.libsDir;
 
       const projectNode = new ProjectNode(project, workspaceRoot);
-      projectNode.focused = project.name === window.focusedProject;
+      projectNode.focused = project.name === focusedProject;
-      projectNode.affected = this.affectedProjects.includes(project.name);
+      projectNode.affected = affectedProjects.includes(project.name);
 
       projectNodes.push(projectNode);
 
-      this.projectGraph.dependencies[project.name].forEach((dep) => {
+      dependencies[project.name].forEach((dep) => {
         if (filteredProjectNames.includes(dep.target)) {
           const edge = new ProjectEdge(dep);
           edge.affected =
-            this.affectedProjects.includes(dep.source) &&
+            affectedProjects.includes(dep.source) &&
-            this.affectedProjects.includes(dep.target);
+            affectedProjects.includes(dep.target);
           edgeNodes.push(edge);
         }
       });

dep-graph/dep-graph/src/app/machines/custom-selected.state.ts

@@ -0,0 +1,24 @@
+import { assign } from '@xstate/immer';
+import { DepGraphStateNodeConfig } from './interfaces';
+
+export const customSelectedStateConfig: DepGraphStateNodeConfig = {
+  on: {
+    updateGraph: {
+      actions: [
+        assign((ctx, event) => {
+          const existingProjectNames = ctx.projects.map(
+            (project) => project.name
+          );
+          const newProjectNames = event.projects.map((project) => project.name);
+          const selectedProjects = newProjectNames.filter(
+            (projectName) => !existingProjectNames.includes(projectName)
+          );
+
+          ctx.projects = event.projects;
+          ctx.dependencies = event.dependencies;
+          ctx.selectedProjects = [...ctx.selectedProjects, ...selectedProjects];
+        }),
+      ],
+    },
+  },
+};

dep-graph/dep-graph/src/app/machines/dep-graph.machine.ts

@@ -0,0 +1,154 @@
+import { assign } from '@xstate/immer';
+import { Machine } from 'xstate';
+import { customSelectedStateConfig } from './custom-selected.state';
+import { focusedStateConfig } from './focused.state';
+import { DepGraphContext, DepGraphEvents, DepGraphSchema } from './interfaces';
+import { textFilteredStateConfig } from './text-filtered.state';
+import { unselectedStateConfig } from './unselected.state';
+
+export const initialContext: DepGraphContext = {
+  projects: [],
+  dependencies: {},
+  affectedProjects: [],
+  selectedProjects: [],
+  focusedProject: null,
+  textFilter: '',
+  includePath: false,
+  searchDepth: 1,
+  searchDepthEnabled: false,
+  groupByFolder: false,
+  workspaceLayout: {
+    libsDir: '',
+    appsDir: '',
+  },
+};
+
+export const depGraphMachine = Machine<
+  DepGraphContext,
+  DepGraphSchema,
+  DepGraphEvents
+>(
+  {
+    id: 'DepGraph',
+    initial: 'idle',
+    context: initialContext,
+    states: {
+      idle: {},
+      unselected: unselectedStateConfig,
+      customSelected: customSelectedStateConfig,
+      focused: focusedStateConfig,
+      textFiltered: textFilteredStateConfig,
+    },
+    on: {
+      initGraph: {
+        target: 'unselected',
+        actions: assign((ctx, event) => {
+          ctx.projects = event.projects;
+          ctx.affectedProjects = event.affectedProjects;
+          ctx.dependencies = event.dependencies;
+        }),
+      },
+
+      selectProject: {
+        target: 'customSelected',
+        actions: [
+          assign((ctx, event) => {
+            ctx.selectedProjects.push(event.projectName);
+          }),
+        ],
+      },
+      selectAll: {
+        target: 'customSelected',
+        actions: [
+          assign((ctx) => {
+            ctx.selectedProjects = ctx.projects.map((project) => project.name);
+          }),
+        ],
+      },
+      selectAffected: {
+        target: 'customSelected',
+        actions: [
+          assign((ctx) => {
+            ctx.selectedProjects = ctx.affectedProjects;
+          }),
+        ],
+      },
+      deselectProject: [
+        {
+          target: 'unselected',
+          cond: 'deselectLastProject',
+        },
+        {
+          target: 'customSelected',
+          actions: [
+            assign((ctx, event) => {
+              const index = ctx.selectedProjects.findIndex(
+                (project) => project === event.projectName
+              );
+
+              ctx.selectedProjects.splice(index, 1);
+            }),
+          ],
+        },
+      ],
+      deselectAll: {
+        target: 'unselected',
+      },
+      focusProject: {
+        target: 'focused',
+      },
+      setGroupByFolder: {
+        actions: [
+          assign((ctx, event: any) => {
+            ctx.groupByFolder = event.groupByFolder;
+          }),
+        ],
+      },
+      setIncludeProjectsByPath: {
+        actions: [
+          assign((ctx, event) => {
+            ctx.includePath = event.includeProjectsByPath;
+          }),
+        ],
+      },
+      setSearchDepth: {
+        actions: [
+          assign((ctx, event) => {
+            ctx.searchDepth = event.searchDepth;
+          }),
+        ],
+      },
+      incrementSearchDepth: {
+        actions: [
+          assign((ctx) => {
+            ctx.searchDepth = ctx.searchDepth + 1;
+          }),
+        ],
+      },
+      decrementSearchDepth: {
+        actions: [
+          assign((ctx) => {
+            ctx.searchDepth = ctx.searchDepth - 1;
+          }),
+        ],
+      },
+      setSearchDepthEnabled: {
+        actions: [
+          assign((ctx, event) => {
+            ctx.searchDepthEnabled = event.searchDepthEnabled;
+          }),
+        ],
+      },
+      filterByText: {
+        target: 'textFiltered',
+      },
+    },
+  },
+  {
+    guards: {
+      deselectLastProject: (ctx) => {
+        return ctx.selectedProjects.length <= 1;
+      },
+    },
+  }
+);

dep-graph/dep-graph/src/app/machines/dep-graph.service.ts

@@ -0,0 +1,38 @@
+import { from } from 'rxjs';
+import { map, shareReplay } from 'rxjs/operators';
+import { interpret, Interpreter, Typestate } from 'xstate';
+import { depGraphMachine } from './dep-graph.machine';
+import {
+  DepGraphContext,
+  DepGraphEvents,
+  DepGraphSend,
+  DepGraphStateObservable,
+} from './interfaces';
+
+let depGraphService: Interpreter<
+  DepGraphContext,
+  any,
+  DepGraphEvents,
+  Typestate<DepGraphContext>
+>;
+
+let depGraphState$: DepGraphStateObservable;
+
+export function useDepGraphService(): [DepGraphStateObservable, DepGraphSend] {
+  if (!depGraphService) {
+    depGraphService = interpret(depGraphMachine, {
+      devTools: !!window.useXstateInspect,
+    });
+    depGraphService.start();
+
+    depGraphState$ = from(depGraphService).pipe(
+      map((state) => ({
+        value: state.value,
+        context: state.context,
+      })),
+      shareReplay(1)
+    );
+  }
+
+  return [depGraphState$, depGraphService.send];
+}

dep-graph/dep-graph/src/app/machines/dep-graph.spec.ts

@@ -0,0 +1,260 @@
+import { ProjectGraphDependency, ProjectGraphNode } from '@nrwl/devkit';
+import { depGraphMachine } from './dep-graph.machine';
+
+export const mockProjects: ProjectGraphNode[] = [
+  {
+    name: 'app1',
+    type: 'app',
+    data: {},
+  },
+  {
+    name: 'app2',
+    type: 'app',
+    data: {},
+  },
+  {
+    name: 'ui-lib',
+    type: 'lib',
+    data: {},
+  },
+  {
+    name: 'feature-lib1',
+    type: 'lib',
+    data: {},
+  },
+  {
+    name: 'feature-lib2',
+    type: 'lib',
+    data: {},
+  },
+  {
+    name: 'auth-lib',
+    type: 'lib',
+    data: {},
+  },
+];
+
+export const mockDependencies: Record<string, ProjectGraphDependency[]> = {
+  app1: [
+    {
+      type: 'static',
+      source: 'app1',
+      target: 'auth-lib',
+    },
+    {
+      type: 'static',
+      source: 'app1',
+      target: 'feature-lib1',
+    },
+  ],
+  app2: [
+    {
+      type: 'static',
+      source: 'app2',
+      target: 'auth-lib',
+    },
+    {
+      type: 'static',
+      source: 'app2',
+      target: 'feature-lib2',
+    },
+  ],
+  'feature-lib1': [
+    {
+      type: 'static',
+      source: 'feature-lib1',
+      target: 'ui-lib',
+    },
+  ],
+  'feature-lib2': [
+    {
+      type: 'static',
+      source: 'feature-lib2',
+      target: 'ui-lib',
+    },
+  ],
+  'ui-lib': [],
+};
+
+describe('dep-graph machine', () => {
+  describe('initGraph', () => {
+    it('should set projects and dependencies', () => {
+      const result = depGraphMachine.transition(depGraphMachine.initialState, {
+        type: 'initGraph',
+        projects: mockProjects,
+        dependencies: mockDependencies,
+        affectedProjects: [],
+        workspaceLayout: { appsDir: 'apps', libsDir: 'libs' },
+      });
+      expect(result.context.projects).toEqual(mockProjects);
+      expect(result.context.dependencies).toEqual(mockDependencies);
+    });
+
+    it('should start with no projects selected', () => {
+      const result = depGraphMachine.transition(depGraphMachine.initialState, {
+        type: 'initGraph',
+        projects: mockProjects,
+        dependencies: mockDependencies,
+        affectedProjects: [],
+        workspaceLayout: { appsDir: 'apps', libsDir: 'libs' },
+      });
+
+      expect(result.value).toEqual('unselected');
+      expect(result.context.selectedProjects).toEqual([]);
+    });
+  });
+
+  describe('selecting projects', () => {
+    it('should select projects', () => {
+      let result = depGraphMachine.transition(depGraphMachine.initialState, {
+        type: 'initGraph',
+        projects: mockProjects,
+        dependencies: mockDependencies,
+        affectedProjects: [],
+        workspaceLayout: { appsDir: 'apps', libsDir: 'libs' },
+      });
+
+      result = depGraphMachine.transition(result, {
+        type: 'selectProject',
+        projectName: 'app1',
+      });
+
+      expect(result.value).toEqual('customSelected');
+      expect(result.context.selectedProjects).toEqual(['app1']);
+
+      result = depGraphMachine.transition(result, {
+        type: 'selectProject',
+        projectName: 'app2',
+      });
+
+      expect(result.context.selectedProjects).toEqual(['app1', 'app2']);
+    });
+  });
+
+  describe('deselecting projects', () => {
+    it('should deselect projects', () => {
+      let result = depGraphMachine.transition(depGraphMachine.initialState, {
+        type: 'initGraph',
+        projects: mockProjects,
+        dependencies: mockDependencies,
+        affectedProjects: [],
+        workspaceLayout: { appsDir: 'apps', libsDir: 'libs' },
+      });
+
+      result = depGraphMachine.transition(result, {
+        type: 'selectProject',
+        projectName: 'app1',
+      });
+
+      result = depGraphMachine.transition(result, {
+        type: 'selectProject',
+        projectName: 'app2',
+      });
+
+      result = depGraphMachine.transition(result, {
+        type: 'deselectProject',
+        projectName: 'app1',
+      });
+
+      expect(result.value).toEqual('customSelected');
+      expect(result.context.selectedProjects).toEqual(['app2']);
+    });
+
+    it('should go to unselected when last project is deselected', () => {
+      let result = depGraphMachine.transition(depGraphMachine.initialState, {
+        type: 'initGraph',
+        projects: mockProjects,
+        dependencies: mockDependencies,
+        affectedProjects: [],
+        workspaceLayout: { appsDir: 'apps', libsDir: 'libs' },
+      });
+
+      result = depGraphMachine.transition(result, {
+        type: 'selectProject',
+        projectName: 'app1',
+      });
+
+      result = depGraphMachine.transition(result, {
+        type: 'selectProject',
+        projectName: 'app2',
+      });
+
+      result = depGraphMachine.transition(result, {
+        type: 'deselectProject',
+        projectName: 'app1',
+      });
+
+      result = depGraphMachine.transition(result, {
+        type: 'deselectProject',
+        projectName: 'app2',
+      });
+
+      expect(result.value).toEqual('unselected');
+      expect(result.context.selectedProjects).toEqual([]);
+    });
+  });
+
+  describe('focusing projects', () => {
+    it('should set the focused project', () => {
+      let result = depGraphMachine.transition(depGraphMachine.initialState, {
+        type: 'initGraph',
+        projects: mockProjects,
+        dependencies: mockDependencies,
+        affectedProjects: [],
+        workspaceLayout: { appsDir: 'apps', libsDir: 'libs' },
+      });
+
+      result = depGraphMachine.transition(result, {
+        type: 'focusProject',
+        projectName: 'app1',
+      });
+
+      expect(result.value).toEqual('focused');
+      expect(result.context.focusedProject).toEqual('app1');
+    });
+
+    it('should select the projects by the focused project', () => {
+      let result = depGraphMachine.transition(depGraphMachine.initialState, {
+        type: 'initGraph',
+        projects: mockProjects,
+        dependencies: mockDependencies,
+        affectedProjects: [],
+        workspaceLayout: { appsDir: 'apps', libsDir: 'libs' },
+      });
+
+      result = depGraphMachine.transition(result, {
+        type: 'focusProject',
+        projectName: 'app1',
+      });
+
+      expect(result.context.selectedProjects).toEqual([
+        'app1',
+        'ui-lib',
+        'feature-lib1',
+        'auth-lib',
+      ]);
+    });
+
+    it('should select no projects on unfocus', () => {
+      let result = depGraphMachine.transition(depGraphMachine.initialState, {
+        type: 'initGraph',
+        projects: mockProjects,
+        dependencies: mockDependencies,
+        affectedProjects: [],
+        workspaceLayout: { appsDir: 'apps', libsDir: 'libs' },
+      });
+
+      result = depGraphMachine.transition(result, {
+        type: 'focusProject',
+        projectName: 'app1',
+      });
+
+      result = depGraphMachine.transition(result, {
+        type: 'unfocusProject',
+      });
+
+      expect(result.value).toEqual('unselected');
+      expect(result.context.selectedProjects).toEqual([]);
+    });
+  });
+});

dep-graph/dep-graph/src/app/machines/focused.state.ts

@@ -0,0 +1,91 @@
+import { assign } from '@xstate/immer';
+import { selectProjectsForFocusedProject } from '../util';
+import { DepGraphStateNodeConfig } from './interfaces';
+
+export const focusedStateConfig: DepGraphStateNodeConfig = {
+  entry: [
+    assign((ctx, event: any) => {
+      ctx.selectedProjects = selectProjectsForFocusedProject(
+        ctx.projects,
+        ctx.dependencies,
+        event.projectName,
+        ctx.searchDepthEnabled ? ctx.searchDepth : -1
+      );
+
+      ctx.focusedProject = event.projectName;
+    }),
+  ],
+  exit: [
+    assign((ctx) => {
+      ctx.focusedProject = null;
+    }),
+  ],
+  on: {
+    incrementSearchDepth: {
+      actions: [
+        assign((ctx) => {
+          const searchDepth = ctx.searchDepth + 1;
+          const selectedProjects = selectProjectsForFocusedProject(
+            ctx.projects,
+            ctx.dependencies,
+            ctx.focusedProject,
+            ctx.searchDepthEnabled ? searchDepth : -1
+          );
+
+          ctx.selectedProjects = selectedProjects;
+          ctx.searchDepth = searchDepth;
+        }),
+      ],
+    },
+    decrementSearchDepth: {
+      actions: [
+        assign((ctx) => {
+          const searchDepth = ctx.searchDepth - 1;
+          const selectedProjects = selectProjectsForFocusedProject(
+            ctx.projects,
+            ctx.dependencies,
+            ctx.focusedProject,
+            ctx.searchDepthEnabled ? searchDepth : -1
+          );
+
+          ctx.selectedProjects = selectedProjects;
+          ctx.searchDepth = searchDepth;
+        }),
+      ],
+    },
+    setSearchDepthEnabled: {
+      actions: [
+        assign((ctx, event) => {
+          const selectedProjects = selectProjectsForFocusedProject(
+            ctx.projects,
+            ctx.dependencies,
+            ctx.focusedProject,
+            event.searchDepthEnabled ? ctx.searchDepth : -1
+          );
+
+          (ctx.searchDepthEnabled = event.searchDepthEnabled),
+            (ctx.selectedProjects = selectedProjects);
+        }),
+      ],
+    },
+    unfocusProject: {
+      target: 'unselected',
+    },
+    updateGraph: {
+      actions: [
+        assign((ctx, event) => {
+          const selectedProjects = selectProjectsForFocusedProject(
+            event.projects,
+            event.dependencies,
+            ctx.focusedProject,
+            ctx.searchDepthEnabled ? ctx.searchDepth : -1
+          );
+
+          ctx.projects = event.projects;
+          ctx.dependencies = event.dependencies;
+          ctx.selectedProjects = selectedProjects;
+        }),
+      ],
+    },
+  },
+};

dep-graph/dep-graph/src/app/machines/interfaces.ts

@@ -0,0 +1,78 @@
+import { ProjectGraphDependency, ProjectGraphNode } from '@nrwl/devkit';
+import { Observable } from 'rxjs';
+import { ActionObject, StateNodeConfig, StateValue } from 'xstate';
+
+// The hierarchical (recursive) schema for the states
+export interface DepGraphSchema {
+  states: {
+    idle: {};
+    unselected: {};
+    focused: {};
+    textFiltered: {};
+    customSelected: {};
+  };
+}
+
+// The events that the machine handles
+export type DepGraphEvents =
+  | { type: 'selectProject'; projectName: string }
+  | { type: 'deselectProject'; projectName: string }
+  | { type: 'selectAll' }
+  | { type: 'deselectAll' }
+  | { type: 'selectAffected' }
+  | { type: 'setGroupByFolder'; groupByFolder: boolean }
+  | { type: 'setIncludeProjectsByPath'; includeProjectsByPath: boolean }
+  | { type: 'setSearchDepth'; searchDepth: number }
+  | { type: 'incrementSearchDepth' }
+  | { type: 'decrementSearchDepth' }
+  | { type: 'setSearchDepthEnabled'; searchDepthEnabled: boolean }
+  | { type: 'focusProject'; projectName: string }
+  | { type: 'unfocusProject' }
+  | { type: 'filterByText'; search: string }
+  | { type: 'clearTextFilter' }
+  | {
+      type: 'initGraph';
+      projects: ProjectGraphNode[];
+      dependencies: Record<string, ProjectGraphDependency[]>;
+      affectedProjects: string[];
+      workspaceLayout: {
+        libsDir: string;
+        appsDir: string;
+      };
+    }
+  | {
+      type: 'updateGraph';
+      projects: ProjectGraphNode[];
+      dependencies: Record<string, ProjectGraphDependency[]>;
+    };
+
+// The context (extended state) of the machine
+export interface DepGraphContext {
+  projects: ProjectGraphNode[];
+  dependencies: Record<string, ProjectGraphDependency[]>;
+  affectedProjects: string[];
+  selectedProjects: string[];
+  focusedProject: string | null;
+  textFilter: string;
+  includePath: boolean;
+  searchDepth: number;
+  searchDepthEnabled: boolean;
+  groupByFolder: boolean;
+  workspaceLayout: {
+    libsDir: string;
+    appsDir: string;
+  };
+}
+
+export type DepGraphStateNodeConfig = StateNodeConfig<
+  DepGraphContext,
+  {},
+  DepGraphEvents,
+  ActionObject<DepGraphContext, DepGraphEvents>
+>;
+
+export type DepGraphSend = (event: DepGraphEvents | DepGraphEvents[]) => void;
+export type DepGraphStateObservable = Observable<{
+  value: StateValue;
+  context: DepGraphContext;
+}>;

dep-graph/dep-graph/src/app/machines/text-filtered.state.ts

@@ -0,0 +1,85 @@
+import { assign } from '@xstate/immer';
+import { filterProjectsByText } from '../util';
+import { DepGraphStateNodeConfig } from './interfaces';
+
+export const textFilteredStateConfig: DepGraphStateNodeConfig = {
+  entry: [
+    assign((ctx, event: any) => {
+      ctx.textFilter = event.search;
+      ctx.selectedProjects = filterProjectsByText(
+        event.search,
+        ctx.includePath,
+        ctx.searchDepthEnabled ? ctx.searchDepth : -1,
+        ctx.projects,
+        ctx.dependencies
+      );
+    }),
+  ],
+  on: {
+    clearTextFilter: {
+      target: 'unselected',
+      actions: assign((ctx) => {
+        ctx.includePath = false;
+        ctx.textFilter = '';
+      }),
+    },
+    setIncludeProjectsByPath: {
+      actions: [
+        assign((ctx, event) => {
+          ctx.includePath = event.includeProjectsByPath;
+          ctx.selectedProjects = filterProjectsByText(
+            ctx.textFilter,
+            event.includeProjectsByPath,
+            ctx.searchDepthEnabled ? ctx.searchDepth : -1,
+            ctx.projects,
+            ctx.dependencies
+          );
+        }),
+      ],
+    },
+    setSearchDepth: {
+      actions: [
+        assign((ctx, event) => {
+          ctx.searchDepth = event.searchDepth;
+          ctx.selectedProjects = filterProjectsByText(
+            ctx.textFilter,
+            ctx.includePath,
+            ctx.searchDepthEnabled ? event.searchDepth : -1,
+            ctx.projects,
+            ctx.dependencies
+          );
+        }),
+      ],
+    },
+    setSearchDepthEnabled: {
+      actions: [
+        assign((ctx, event) => {
+          ctx.searchDepthEnabled = event.searchDepthEnabled;
+          ctx.selectedProjects = filterProjectsByText(
+            ctx.textFilter,
+            ctx.includePath,
+            event.searchDepthEnabled ? ctx.searchDepth : -1,
+            ctx.projects,
+            ctx.dependencies
+          );
+        }),
+      ],
+    },
+    updateGraph: {
+      actions: [
+        assign((ctx, event) => {
+          ctx.selectedProjects = filterProjectsByText(
+            ctx.textFilter,
+            ctx.includePath,
+            ctx.searchDepthEnabled ? ctx.searchDepth : -1,
+            event.projects,
+            event.dependencies
+          );
+
+          ctx.projects = event.projects;
+          ctx.dependencies = event.dependencies;
+        }),
+      ],
+    },
+  },
+};

dep-graph/dep-graph/src/app/machines/unselected.state.ts

@@ -0,0 +1,29 @@
+import { assign } from '@xstate/immer';
+import { DepGraphStateNodeConfig } from './interfaces';
+
+export const unselectedStateConfig: DepGraphStateNodeConfig = {
+  entry: [
+    assign((ctx) => {
+      ctx.selectedProjects = [];
+    }),
+  ],
+  on: {
+    updateGraph: {
+      actions: [
+        assign((ctx, event) => {
+          const existingProjectNames = ctx.projects.map(
+            (project) => project.name
+          );
+          const newProjectNames = event.projects.map((project) => project.name);
+          const selectedProjects = newProjectNames.filter(
+            (projectName) => !existingProjectNames.includes(projectName)
+          );
+
+          ctx.projects = event.projects;
+          ctx.dependencies = event.dependencies;
+          ctx.selectedProjects = [...ctx.selectedProjects, ...selectedProjects];
+        }),
+      ],
+    },
+  },
+};

dep-graph/dep-graph/src/app/mock-project-graph-service.ts

@@ -38,9 +38,6 @@ export class MockProjectGraphService implements ProjectGraphService {
       ],
       'existing-lib-1': [],
     },
-    changes: {
-      added: [],
-    },
     affected: [],
     focus: null,
     exclude: [],
@@ -88,8 +85,14 @@ export class MockProjectGraphService implements ProjectGraphService {
         type: 'static',
       },
     ];
-    this.response.projects.push(newProject);
+
-    this.response.dependencies[newProject.name] = newDependency;
+    this.response = {
-    this.response.changes.added.push(newProject.name);
+      ...this.response,
+      projects: [...this.response.projects, newProject],
+      dependencies: {
+        ...this.response.dependencies,
+        [newProject.name]: newDependency,
+      },
+    };
   }
 }

dep-graph/dep-graph/src/app/models.ts

@@ -17,20 +17,17 @@ export interface ProjectGraphService {
   getProjectGraph: (url: string) => Promise<DepGraphClientResponse>;
 }
 export interface Environment {
-  environment: 'dev' | 'dev-watch' | 'release';
+  environment: 'dev' | 'watch' | 'release';
-  appConfig: AppConfig;
 }
 
 export interface AppConfig {
   showDebugger: boolean;
   projectGraphs: ProjectGraphList[];
   defaultProjectGraph: string;
-  projectGraphService: ProjectGraphService;
 }
 
 export const DEFAULT_CONFIG: AppConfig = {
   showDebugger: false,
   projectGraphs: [],
   defaultProjectGraph: null,
-  projectGraphService: null,
 };

dep-graph/dep-graph/src/app/project-node-tooltip.ts

@@ -1,4 +1,5 @@
 import * as cy from 'cytoscape';
+import { useDepGraphService } from './machines/dep-graph.service';
 
 export class ProjectNodeToolTip {
   constructor(private node: cy.NodeSingular) {}
@@ -53,13 +54,15 @@ export class ProjectNodeToolTip {
 
     wrapper.classList.add('flex');
 
+    const [_, send] = useDepGraphService();
+
     focusButton.addEventListener('click', () =>
-      window.focusProject(this.node.attr('id'))
+      send({ type: 'focusProject', projectName: this.node.attr('id') })
     );
     focusButton.innerText = 'Focus';
 
     excludeButton.addEventListener('click', () => {
-      window.excludeProject(this.node.attr('id'));
+      send({ type: 'deselectProject', projectName: this.node.attr('id') });
     });
 
     excludeButton.innerText = 'Exclude';

dep-graph/dep-graph/src/app/ui-sidebar/display-options-panel.ts

@@ -1,51 +1,34 @@
-import { BehaviorSubject, combineLatest, Subject } from 'rxjs';
+import { useDepGraphService } from '../machines/dep-graph.service';
-import { distinctUntilChanged, map, withLatestFrom } from 'rxjs/operators';
+import { DepGraphSend } from '../machines/interfaces';
 import { removeChildrenFromContainer } from '../util';
 
 export class DisplayOptionsPanel {
-  private showAffected = false;
-  private groupByFolder = false;
-  private selectAffectedSubject = new Subject<void>();
-  private selectAllSubject = new Subject<void>();
-  private deselectAllSubject = new Subject<void>();
-  private groupByFolderSubject = new Subject<boolean>();
-  private searchByDepthSubject = new BehaviorSubject<number>(1);
-  private searchByDepthEnabledSubject = new BehaviorSubject<boolean>(false);
-  private searchDepthChangesSubject = new Subject<'increment' | 'decrement'>();
-
-  selectAffected$ = this.selectAffectedSubject.asObservable();
-  selectAll$ = this.selectAllSubject.asObservable();
-  deselectAll$ = this.deselectAllSubject.asObservable();
-  groupByFolder$ = this.groupByFolderSubject.asObservable();
-  searchDepth$ = combineLatest([
-    this.searchByDepthSubject,
-    this.searchByDepthEnabledSubject,
-  ]).pipe(
-    map(([searchDepth, enabled]) => {
-      return enabled ? searchDepth : -1;
-    }),
-    distinctUntilChanged()
-  );
-
   searchDepthDisplay: HTMLSpanElement;
+  affectedButtonElement: HTMLElement;
+  groupByFolderCheckboxElement: HTMLInputElement;
 
-  constructor(showAffected = false, groupByFolder = false) {
+  send: DepGraphSend;
-    this.showAffected = showAffected;
-    this.groupByFolder = groupByFolder;
 
-    this.searchDepthChangesSubject
+  constructor(private container: HTMLElement) {
-      .pipe(withLatestFrom(this.searchByDepthSubject))
+    const [state$, send] = useDepGraphService();
-      .subscribe(([action, current]) => {
+    this.send = send;
-        if (action === 'decrement' && current > 1) {
+    this.render();
-          this.searchByDepthSubject.next(current - 1);
-        } else if (action === 'increment') {
-          this.searchByDepthSubject.next(current + 1);
-        }
-      });
 
-    this.searchByDepthSubject.subscribe((current) => {
+    state$.subscribe((state) => {
-      if (this.searchDepthDisplay) {
+      if (state.context.affectedProjects.length > 0) {
-        this.searchDepthDisplay.innerText = current.toString();
+        this.affectedButtonElement.classList.remove('hidden');
+        this.affectedButtonElement.addEventListener('click', () =>
+          this.send({ type: 'selectAffected' })
+        );
+      }
+
+      this.searchDepthDisplay.innerText = state.context.searchDepth.toString();
+
+      if (
+        this.groupByFolderCheckboxElement.checked !==
+        state.context.groupByFolder
+      ) {
+        this.groupByFolderCheckboxElement.checked = state.context.groupByFolder;
       }
     });
   }
@@ -119,44 +102,39 @@ export class DisplayOptionsPanel {
     return render.content.firstChild as HTMLElement;
   }
 
-  render(container: HTMLElement) {
+  private render() {
-    removeChildrenFromContainer(container);
+    removeChildrenFromContainer(this.container);
 
     const element = DisplayOptionsPanel.renderHtmlTemplate();
 
-    const affectedButtonElement: HTMLElement = element.querySelector(
+    this.affectedButtonElement = element.querySelector(
       '[data-cy="affectedButton"]'
     );
 
-    if (this.showAffected) {
-      affectedButtonElement.classList.remove('hidden');
-      affectedButtonElement.addEventListener('click', () =>
-        this.selectAffectedSubject.next()
-      );
-    }
-
     const selectAllButtonElement: HTMLElement = element.querySelector(
       '[data-cy="selectAllButton"]'
     );
     selectAllButtonElement.addEventListener('click', () => {
-      this.selectAllSubject.next();
+      this.send({ type: 'selectAll' });
     });
 
     const deselectAllButtonElement: HTMLElement = element.querySelector(
       '[data-cy="deselectAllButton"]'
     );
     deselectAllButtonElement.addEventListener('click', () => {
-      this.deselectAllSubject.next();
+      this.send({ type: 'deselectAll' });
     });
 
-    const groupByFolderCheckboxElement: HTMLInputElement =
+    this.groupByFolderCheckboxElement =
       element.querySelector('#displayOptions');
-    groupByFolderCheckboxElement.checked = this.groupByFolder;
 
-    groupByFolderCheckboxElement.addEventListener(
+    this.groupByFolderCheckboxElement.addEventListener(
       'change',
       (event: InputEvent) =>
-        this.groupByFolderSubject.next((<HTMLInputElement>event.target).checked)
+        this.send({
+          type: 'setGroupByFolder',
+          groupByFolder: (event.target as HTMLInputElement).checked,
+        })
     );
 
     this.searchDepthDisplay = element.querySelector('#depthFilterValue');
@@ -170,18 +148,19 @@ export class DisplayOptionsPanel {
       element.querySelector('#depthFilter');
 
     incrementButtonElement.addEventListener('click', () => {
-      this.searchDepthChangesSubject.next('increment');
+      this.send({ type: 'incrementSearchDepth' });
     });
     decrementButtonElement.addEventListener('click', () => {
-      this.searchDepthChangesSubject.next('decrement');
+      this.send({ type: 'decrementSearchDepth' });
     });
 
     searchDepthEnabledElement.addEventListener('change', (event: InputEvent) =>
-      this.searchByDepthEnabledSubject.next(
+      this.send({
-        (<HTMLInputElement>event.target).checked
+        type: 'setSearchDepthEnabled',
-      )
+        searchDepthEnabled: (<HTMLInputElement>event.target).checked,
+      })
     );
 
-    container.appendChild(element);
+    this.container.appendChild(element);
   }
 }

dep-graph/dep-graph/src/app/ui-sidebar/focused-project-panel.ts

@@ -1,17 +1,18 @@
-import { Subject } from 'rxjs';
+import { map } from 'rxjs/operators';
+import { useDepGraphService } from '../machines/dep-graph.service';
+import { DepGraphSend } from '../machines/interfaces';
 import { removeChildrenFromContainer } from '../util';
 
 export class FocusedProjectPanel {
-  private unfocusSubject = new Subject<void>();
+  private send: DepGraphSend;
-
-  set projectName(projectName: string) {
-    this.render(projectName);
-  }
-
-  unfocus$ = this.unfocusSubject.asObservable();
 
   constructor(private container: HTMLElement) {
-    this.render();
+    const [state$, send] = useDepGraphService();
+    this.send = send;
+
+    state$
+      .pipe(map(({ context }) => context.focusedProject))
+      .subscribe((focusedProject) => this.render(focusedProject));
   }
 
   private static renderHtmlTemplate(): HTMLElement {
@@ -39,10 +40,6 @@ export class FocusedProjectPanel {
     return render.content.firstChild as HTMLElement;
   }
 
-  unfocusProject() {
-    this.render();
-  }
-
   private render(projectName?: string) {
     removeChildrenFromContainer(this.container);
 
@@ -62,7 +59,7 @@ export class FocusedProjectPanel {
     }
 
     unfocusButtonElement.addEventListener('click', () =>
-      this.unfocusSubject.next()
+      this.send({ type: 'unfocusProject' })
     );
 
     this.container.appendChild(element);

dep-graph/dep-graph/src/app/ui-sidebar/project-list.ts

@@ -1,35 +1,24 @@
 import type { ProjectGraphNode } from '@nrwl/devkit';
-import { Subject } from 'rxjs';
+import { useDepGraphService } from '../machines/dep-graph.service';
+import { DepGraphSend } from '../machines/interfaces';
 import {
   parseParentDirectoriesFromPilePath,
   removeChildrenFromContainer,
 } from '../util';
 
 export class ProjectList {
-  private focusProjectSubject = new Subject<string>();
+  private projectItems: Record<string, HTMLElement> = {};
-  private checkedProjectsChangeSubject = new Subject<string[]>();
-  private selectedItems: Record<string, HTMLElement> = {};
-  checkedProjectsChange$ = this.checkedProjectsChangeSubject.asObservable();
-  focusProject$ = this.focusProjectSubject.asObservable();
 
-  private _projects: ProjectGraphNode[] = [];
+  private send: DepGraphSend;
-
-  set projects(projects: ProjectGraphNode[]) {
-    this._projects = projects;
-
-    const previouslyCheckedProjects = Object.values(this.selectedItems)
-      .filter((checkbox) => checkbox.dataset['active'] === 'true')
-      .map((checkbox) => checkbox.dataset['project']);
-    this.render();
-    this.selectProjects(previouslyCheckedProjects);
-  }
-
-  get projects(): ProjectGraphNode[] {
-    return this._projects;
-  }
 
   constructor(private container: HTMLElement) {
-    this.render();
+    const [state$, send] = useDepGraphService();
+    this.send = send;
+
+    state$.subscribe((state) => {
+      this.render(state.context.projects, state.context.workspaceLayout);
+      this.setSelectedProjects(state.context.selectedProjects);
+    });
   }
 
   private static renderHtmlItemTemplate(): HTMLElement {
@@ -60,63 +49,49 @@ export class ProjectList {
     return render.content.firstChild as HTMLElement;
   }
 
-  selectProjects(projects: string[]) {
+  setSelectedProjects(selectedProjects: string[]) {
-    projects.forEach((projectName) => {
+    Object.keys(this.projectItems).forEach((projectName) => {
-      if (!!this.selectedItems[projectName]) {
+      this.projectItems[projectName].dataset['active'] = selectedProjects
-        this.selectedItems[projectName].dataset['active'] = 'true';
-        this.selectedItems[projectName].dispatchEvent(
-          new CustomEvent('change')
-        );
-      }
-    });
-    this.emitChanges();
-  }
-
-  setCheckedProjects(selectedProjects: string[]) {
-    Object.keys(this.selectedItems).forEach((projectName) => {
-      this.selectedItems[projectName].dataset['active'] = selectedProjects
         .includes(projectName)
         .toString();
-      this.selectedItems[projectName].dispatchEvent(new CustomEvent('change'));
+      this.projectItems[projectName].dispatchEvent(new CustomEvent('change'));
     });
   }
 
   checkAllProjects() {
-    Object.values(this.selectedItems).forEach((item) => {
+    this.send({ type: 'selectAll' });
-      item.dataset['active'] = 'true';
-      item.dispatchEvent(new CustomEvent('change'));
-    });
   }
 
   uncheckAllProjects() {
-    Object.values(this.selectedItems).forEach((item) => {
+    this.send({ type: 'deselectAll' });
-      item.dataset['active'] = 'false';
-      item.dispatchEvent(new CustomEvent('change'));
-    });
   }
 
   uncheckProject(projectName: string) {
-    this.selectedItems[projectName].dataset['active'] = 'false';
+    this.send({ type: 'deselectProject', projectName });
-    this.selectedItems[projectName].dispatchEvent(new CustomEvent('change'));
   }
 
-  private emitChanges() {
+  private render(
-    const changes = Object.values(this.selectedItems)
+    projects: ProjectGraphNode[],
-      .filter((item) => item.dataset['active'] === 'true')
+    workspaceLayout: { appsDir: string; libsDir: string }
-      .map((item) => item.dataset['project']);
+  ) {
-    this.checkedProjectsChangeSubject.next(changes);
-  }
-
-  private render() {
     removeChildrenFromContainer(this.container);
 
-    const appProjects = this.getProjectsByType('app');
+    const appProjects = this.getProjectsByType('app', projects);
-    const libProjects = this.getProjectsByType('lib');
+    const libProjects = this.getProjectsByType('lib', projects);
-    const e2eProjects = this.getProjectsByType('e2e');
+    const e2eProjects = this.getProjectsByType('e2e', projects);
 
-    const appDirectoryGroups = this.groupProjectsByDirectory(appProjects);
+    const appDirectoryGroups = this.groupProjectsByDirectory(
-    const libDirectoryGroups = this.groupProjectsByDirectory(libProjects);
+      appProjects,
-    const e2eDirectoryGroups = this.groupProjectsByDirectory(e2eProjects);
+      workspaceLayout
+    );
+    const libDirectoryGroups = this.groupProjectsByDirectory(
+      libProjects,
+      workspaceLayout
+    );
+    const e2eDirectoryGroups = this.groupProjectsByDirectory(
+      e2eProjects,
+      workspaceLayout
+    );
 
     const sortedAppDirectories = Object.keys(appDirectoryGroups).sort();
     const sortedLibDirectories = Object.keys(libDirectoryGroups).sort();
@@ -153,20 +128,23 @@ export class ProjectList {
     });
   }
 
-  private getProjectsByType(type) {
+  private getProjectsByType(type: string, projects: ProjectGraphNode[]) {
-    return this.projects
+    return projects
       .filter((project) => project.type === type)
       .sort((a, b) => a.name.localeCompare(b.name));
   }
 
-  private groupProjectsByDirectory(projects: ProjectGraphNode[]) {
+  private groupProjectsByDirectory(
+    projects: ProjectGraphNode[],
+    workspaceLayout: { appsDir: string; libsDir: string }
+  ) {
     let groups = {};
 
     projects.forEach((project) => {
       const workspaceRoot =
         project.type === 'app' || project.type === 'e2e'
-          ? window.workspaceLayout.appsDir
+          ? workspaceLayout.appsDir
-          : window.workspaceLayout.libsDir;
+          : workspaceLayout.libsDir;
       const directories = parseParentDirectoriesFromPilePath(
         project.data.root,
         workspaceRoot
@@ -203,7 +181,7 @@ export class ProjectList {
       );
       const focusButtonElement: HTMLElement = element.querySelector('button');
       focusButtonElement.addEventListener('click', () =>
-        this.focusProjectSubject.next(project.name)
+        this.send({ type: 'focusProject', projectName: project.name })
       );
 
       const projectNameElement: HTMLElement = element.querySelector('label');
@@ -214,12 +192,19 @@ export class ProjectList {
 
       projectNameElement.addEventListener('click', (event) => {
         const el = event.target as HTMLElement;
-        el.dataset['active'] =
+        if (el.dataset['active'] === 'true') {
-          el.dataset['active'] === 'false' ? 'true' : 'false';
+          this.send({
-        el.dispatchEvent(new CustomEvent('change'));
+            type: 'deselectProject',
-
+            projectName: el.dataset['project'],
-        this.emitChanges();
+          });
+        } else {
+          this.send({
+            type: 'selectProject',
+            projectName: el.dataset['project'],
+          });
+        }
       });
+
       projectNameElement.addEventListener('change', (event) => {
         const el = event.target as HTMLElement;
         if (el.dataset['active'] === 'false') {
@@ -231,7 +216,7 @@ export class ProjectList {
         projectNameElement.dispatchEvent(new Event('click'));
       });
 
-      this.selectedItems[project.name] = projectNameElement;
+      this.projectItems[project.name] = projectNameElement;
 
       formGroup.append(element);
     });

dep-graph/dep-graph/src/app/ui-sidebar/sidebar.ts

@@ -1,52 +1,28 @@
-import { ProjectGraphNode } from '@nrwl/devkit';
-import { BehaviorSubject, combineLatest, fromEvent, Subject } from 'rxjs';
 import { DisplayOptionsPanel } from './display-options-panel';
 import { FocusedProjectPanel } from './focused-project-panel';
 import { ProjectList } from './project-list';
-import { TextFilterChangeEvent, TextFilterPanel } from './text-filter-panel';
+import { TextFilterPanel } from './text-filter-panel';
 
 declare var ResizeObserver;
 
 export class SidebarComponent {
-  private selectedProjectsChangedSubject = new BehaviorSubject<string[]>([]);
-  private groupByFolderChangedSubject = new BehaviorSubject<boolean>(
-    window.groupByFolder
-  );
-
-  private focusProjectSubject = new Subject<string>();
-  private filterByTextSubject = new Subject<TextFilterChangeEvent>();
-
-  selectedProjectsChanged$ = this.selectedProjectsChangedSubject.asObservable();
-  groupByFolderChanged$ = this.groupByFolderChangedSubject.asObservable();
-
   private displayOptionsPanel: DisplayOptionsPanel;
   private focusedProjectPanel: FocusedProjectPanel;
   private textFilterPanel: TextFilterPanel;
   private projectList: ProjectList;
 
-  private groupByFolder = window.groupByFolder;
+  constructor() {
-  private selectedProjects: string[] = [];
-
-  set projects(projects: ProjectGraphNode[]) {
-    this.projectList.projects = projects;
-    this.focusedProjectPanel.unfocusProject();
-  }
-
-  constructor(private affectedProjects: string[]) {
-    const showAffected = this.affectedProjects.length > 0;
-
     const displayOptionsPanelContainer = document.getElementById(
       'display-options-panel'
     );
 
     this.displayOptionsPanel = new DisplayOptionsPanel(
-      showAffected,
+      displayOptionsPanelContainer
-      this.groupByFolder
     );
-    this.displayOptionsPanel.render(displayOptionsPanelContainer);
 
     const focusedProjectPanelContainer =
       document.getElementById('focused-project');
+
     this.focusedProjectPanel = new FocusedProjectPanel(
       focusedProjectPanelContainer
     );
@@ -57,232 +33,5 @@ export class SidebarComponent {
 
     const projectListContainer = document.getElementById('project-lists');
     this.projectList = new ProjectList(projectListContainer);
-
-    this.projectList.projects = window.projects;
-
-    if (showAffected) {
-      this.selectAffectedProjects();
-    }
-
-    window.focusProject = (projectId) => {
-      this.focusProjectSubject.next(projectId);
-    };
-
-    window.excludeProject = (projectId) => {
-      this.excludeProject(projectId);
-    };
-
-    this.listenForDOMEvents();
-
-    if (window.focusedProject !== null) {
-      this.focusProject(window.focusedProject);
-    }
-
-    if (window.exclude.length > 0) {
-      window.exclude.forEach((project) => this.excludeProject(project));
-    }
-  }
-
-  selectProjects(projects: string[]) {
-    this.projectList.selectProjects(projects);
-  }
-
-  resetSidebarVisibility() {
-    const sidebarElement = document.getElementById('sidebar');
-
-    if (sidebarElement.classList.contains('hidden')) {
-      sidebarElement.classList.remove('hidden');
-      sidebarElement.style.marginLeft = `0px`;
-    }
-  }
-
-  listenForDOMEvents() {
-    this.displayOptionsPanel.selectAll$.subscribe(() => {
-      this.selectAllProjects();
-    });
-
-    this.displayOptionsPanel.deselectAll$.subscribe(() => {
-      this.deselectAllProjects();
-    });
-
-    this.displayOptionsPanel.selectAffected$.subscribe(() => {
-      this.selectAffectedProjects();
-    });
-
-    this.displayOptionsPanel.groupByFolder$.subscribe((groupByFolder) => {
-      this.groupByFolderChangedSubject.next(groupByFolder);
-    });
-
-    this.focusedProjectPanel.unfocus$.subscribe(() => {
-      this.unfocusProject();
-    });
-
-    this.textFilterPanel.changes$.subscribe((event) => {
-      this.filterByTextSubject.next(event);
-    });
-
-    combineLatest([
-      this.filterByTextSubject,
-      this.displayOptionsPanel.searchDepth$,
-    ]).subscribe(([event, searchDepth]) => {
-      if (event.text && !!event.text.length) {
-        this.filterProjectsByText(event.text, event.includeInPath, searchDepth);
-      } else this.deselectAllProjects();
-    });
-
-    this.projectList.checkedProjectsChange$.subscribe((checkedProjects) => {
-      this.emitSelectedProjects(checkedProjects);
-    });
-
-    this.projectList.focusProject$.subscribe((projectName) => {
-      this.focusProjectSubject.next(projectName);
-    });
-
-    combineLatest([
-      this.focusProjectSubject,
-      this.displayOptionsPanel.searchDepth$,
-    ]).subscribe(([projectName, searchDepth]) => {
-      if (projectName) {
-        this.focusProject(projectName, searchDepth);
-      }
-    });
-  }
-
-  private setFocusedProject(projectId: string = null) {
-    window.focusedProject = projectId;
-    if (projectId) {
-      this.focusedProjectPanel.projectName = window.graph.nodes[projectId].name;
-    } else {
-      this.focusedProjectPanel.projectName = null;
-    }
-  }
-
-  selectAffectedProjects() {
-    this.setFocusedProject(null);
-    this.projectList.setCheckedProjects(this.affectedProjects);
-    this.emitSelectedProjects(this.affectedProjects);
-  }
-
-  selectAllProjects() {
-    this.setFocusedProject(null);
-    this.projectList.checkAllProjects();
-    this.emitSelectedProjects(window.projects.map((project) => project.name));
-  }
-
-  deselectAllProjects() {
-    this.setFocusedProject(null);
-    this.projectList.uncheckAllProjects();
-    this.emitSelectedProjects([]);
-  }
-
-  focusProject(id: string, searchDepth: number = -1) {
-    this.filterByTextSubject.next({ text: null, includeInPath: false });
-    this.setFocusedProject(id);
-
-    const selectedProjects = window.projects
-      .map((project) => project.name)
-      .filter(
-        (projectName) =>
-          this.hasPath(id, projectName, [], 1, searchDepth) ||
-          this.hasPath(projectName, id, [], 1, searchDepth)
-      );
-
-    this.projectList.setCheckedProjects(selectedProjects);
-
-    this.emitSelectedProjects(selectedProjects);
-  }
-
-  unfocusProject() {
-    this.focusProjectSubject.next(null);
-    this.setFocusedProject(null);
-
-    this.projectList.uncheckAllProjects();
-
-    this.emitSelectedProjects([]);
-  }
-
-  excludeProject(id: string) {
-    const selectedProjects = [...this.selectedProjects];
-    selectedProjects.splice(this.selectedProjects.indexOf(id), 1);
-
-    this.projectList.uncheckProject(id);
-    this.emitSelectedProjects(selectedProjects);
-  }
-
-  emitSelectedProjects(selectedProjects: string[]) {
-    this.selectedProjects = selectedProjects;
-
-    this.selectedProjectsChangedSubject.next(selectedProjects);
-  }
-
-  filterProjectsByText(
-    text: string,
-    includeInPath: boolean,
-    searchDepth: number
-  ) {
-    this.focusProjectSubject.next(null);
-    this.setFocusedProject(null);
-    this.projectList.uncheckAllProjects();
-
-    const split = text.split(',').map((splitItem) => splitItem.trim());
-
-    const selectedProjects = new Set<string>();
-
-    window.projects
-      .map((project) => project.name)
-      .forEach((project) => {
-        const projectMatch =
-          split.findIndex((splitItem) => project.includes(splitItem)) > -1;
-
-        if (projectMatch) {
-          selectedProjects.add(project);
-
-          if (includeInPath) {
-            window.projects
-              .map((project) => project.name)
-              .forEach((projectInPath) => {
-                if (
-                  this.hasPath(project, projectInPath, [], 1, searchDepth) ||
-                  this.hasPath(projectInPath, project, [], 1, searchDepth)
-                ) {
-                  selectedProjects.add(projectInPath);
-                }
-              });
-          }
-        }
-      });
-
-    const selectedProjectsArray = Array.from(selectedProjects);
-    this.projectList.setCheckedProjects(selectedProjectsArray);
-    this.emitSelectedProjects(selectedProjectsArray);
-  }
-
-  private hasPath(
-    target,
-    node,
-    visited,
-    currentSearchDepth: number,
-    maxSearchDepth: number = -1 // -1 indicates unlimited search depth
-  ) {
-    if (target === node) return true;
-
-    if (maxSearchDepth === -1 || currentSearchDepth <= maxSearchDepth) {
-      for (let d of window.graph.dependencies[node] || []) {
-        if (visited.indexOf(d.target) > -1) continue;
-        visited.push(d.target);
-        if (
-          this.hasPath(
-            target,
-            d.target,
-            visited,
-            currentSearchDepth + 1,
-            maxSearchDepth
-          )
-        )
-          return true;
-      }
-    }
-
-    return false;
   }
 }

dep-graph/dep-graph/src/app/ui-sidebar/text-filter-panel.ts

@@ -1,6 +1,8 @@
-import { fromEvent, Subject, Subscription } from 'rxjs';
+import { fromEvent, Subscription } from 'rxjs';
-import { removeChildrenFromContainer } from '../util';
 import { debounceTime, filter, map } from 'rxjs/operators';
+import { useDepGraphService } from '../machines/dep-graph.service';
+import { DepGraphSend } from '../machines/interfaces';
+import { removeChildrenFromContainer } from '../util';
 
 export interface TextFilterChangeEvent {
   text: string;
@@ -10,13 +12,11 @@ export interface TextFilterChangeEvent {
 export class TextFilterPanel {
   private textInput: HTMLInputElement;
   private includeInPathCheckbox: HTMLInputElement;
-  private changesSubject = new Subject<TextFilterChangeEvent>();
+  private send: DepGraphSend;
-  private subscriptions: Subscription[] = [];
-
-  changes$ = this.changesSubject.asObservable();
 
   constructor(private container: HTMLElement) {
-    this.subscriptions.map((s) => s.unsubscribe());
+    const [_, send] = useDepGraphService();
+    this.send = send;
     this.render();
   }
 
@@ -42,7 +42,7 @@ export class TextFilterPanel {
           <div class="mt-4 px-4">
             <div class="flex items-start">
               <div class="flex items-center h-5">
-                <input id="includeInPath" name="textFilterCheckbox" type="checkbox" value="includeInPath" class="h-4 w-4 border-gray-300 rounded" disabled>
+                <input disabled id="includeInPath" name="textFilterCheckbox" type="checkbox" value="includeInPath" class="h-4 w-4 border-gray-300 rounded">
               </div>
               <div class="ml-3 text-sm">
                 <label for="includeInPath" class="font-medium text-gray-700 cursor-pointer">Include related libraries</label>
@@ -55,13 +55,6 @@ export class TextFilterPanel {
     return render.content.firstChild as HTMLElement;
   }
 
-  private emitChanges() {
-    this.changesSubject.next({
-      text: this.textInput.value.toLowerCase(),
-      includeInPath: this.includeInPathCheckbox.checked,
-    });
-  }
-
   private render() {
     removeChildrenFromContainer(this.container);
 
@@ -72,7 +65,10 @@ export class TextFilterPanel {
 
     this.textInput = element.querySelector('input[type="text"]');
     this.textInput.addEventListener('keyup', (event) => {
-      if (event.key === 'Enter') this.emitChanges();
+      if (event.key === 'Enter') {
+        this.send({ type: 'filterByText', search: this.textInput.value });
+      }
+
       if (!!this.textInput.value.length) {
         resetInputElement.classList.remove('hidden');
         this.includeInPathCheckbox.disabled = false;
@@ -82,19 +78,22 @@ export class TextFilterPanel {
       }
     });
 
-    this.subscriptions.push(
+    fromEvent(this.textInput, 'keyup')
-      fromEvent(this.textInput, 'keyup')
+      .pipe(
-        .pipe(
+        filter((event: KeyboardEvent) => event.key !== 'Enter'),
-          filter((event: KeyboardEvent) => event.key !== 'Enter'),
+        debounceTime(500),
-          debounceTime(500),
+        map(() =>
-          map(() => this.emitChanges())
+          this.send({ type: 'filterByText', search: this.textInput.value })
         )
-        .subscribe()
+      )
-    );
+      .subscribe();
 
     this.includeInPathCheckbox = element.querySelector('#includeInPath');
     this.includeInPathCheckbox.addEventListener('change', () =>
-      this.emitChanges()
+      this.send({
+        type: 'setIncludeProjectsByPath',
+        includeProjectsByPath: this.includeInPathCheckbox.checked,
+      })
     );
 
     resetInputElement.addEventListener('click', () => {
@@ -102,7 +101,7 @@ export class TextFilterPanel {
       this.includeInPathCheckbox.checked = false;
       this.includeInPathCheckbox.disabled = true;
       resetInputElement.classList.add('hidden');
-      this.emitChanges();
+      this.send([{ type: 'clearTextFilter' }]);
     });
 
     this.container.appendChild(element);

dep-graph/dep-graph/src/app/util.ts

@@ -1,3 +1,5 @@
+import { ProjectGraphDependency, ProjectGraphNode } from '@nrwl/devkit';
+
 export function removeChildrenFromContainer(container: HTMLElement) {
   Array.from(container.children).forEach((child) =>
     container.removeChild(child)
@@ -27,3 +29,115 @@ export function parseParentDirectoriesFromPilePath(
 
   return split;
 }
+
+export function hasPath(
+  dependencies: Record<string, ProjectGraphDependency[]>,
+  target: string,
+  node: string,
+  visited: string[],
+  currentSearchDepth: number,
+  maxSearchDepth: number = -1 // -1 indicates unlimited search depth
+) {
+  if (target === node) return true;
+
+  if (maxSearchDepth === -1 || currentSearchDepth <= maxSearchDepth) {
+    for (let d of dependencies[node] || []) {
+      if (visited.indexOf(d.target) > -1) continue;
+      visited.push(d.target);
+      if (
+        hasPath(
+          dependencies,
+          target,
+          d.target,
+          visited,
+          currentSearchDepth + 1,
+          maxSearchDepth
+        )
+      )
+        return true;
+    }
+  }
+
+  return false;
+}
+
+export function selectProjectsForFocusedProject(
+  projects: ProjectGraphNode[],
+  dependencies: Record<string, ProjectGraphDependency[]>,
+  focusedProjectName: string,
+  searchDepth: number
+) {
+  return projects
+    .map((project) => project.name)
+    .filter(
+      (projectName) =>
+        hasPath(
+          dependencies,
+          focusedProjectName,
+          projectName,
+          [],
+          1,
+          searchDepth
+        ) ||
+        hasPath(
+          dependencies,
+          projectName,
+          focusedProjectName,
+          [],
+          1,
+          searchDepth
+        )
+    );
+}
+
+export function filterProjectsByText(
+  text: string,
+  includeInPath: boolean,
+  searchDepth: number,
+  projects: ProjectGraphNode[],
+  dependencies: Record<string, ProjectGraphDependency[]>
+) {
+  const split = text.split(',').map((splitItem) => splitItem.trim());
+
+  const selectedProjects = new Set<string>();
+
+  projects
+    .map((project) => project.name)
+    .forEach((project) => {
+      const projectMatch =
+        split.findIndex((splitItem) => project.includes(splitItem)) > -1;
+
+      if (projectMatch) {
+        selectedProjects.add(project);
+
+        if (includeInPath) {
+          projects
+            .map((project) => project.name)
+            .forEach((projectInPath) => {
+              if (
+                hasPath(
+                  dependencies,
+                  project,
+                  projectInPath,
+                  [],
+                  1,
+                  searchDepth
+                ) ||
+                hasPath(
+                  dependencies,
+                  projectInPath,
+                  project,
+                  [],
+                  1,
+                  searchDepth
+                )
+              ) {
+                selectedProjects.add(projectInPath);
+              }
+            });
+        }
+      }
+    });
+
+  return Array.from(selectedProjects);
+}

dep-graph/dep-graph/src/assets/environment.dev.js

@@ -0,0 +1,38 @@
+window.exclude = [];
+window.focusedProject = null;
+window.groupByFolder = false;
+window.watch = false;
+window.environment = 'dev';
+window.useXstateInspect = false;
+
+window.appConfig = {
+  showDebugger: true,
+  projectGraphs: [
+    {
+      id: 'nx',
+      label: 'Nx',
+      url: 'assets/graphs/nx.json',
+    },
+    {
+      id: 'ocean',
+      label: 'Ocean',
+      url: 'assets/graphs/ocean.json',
+    },
+    {
+      id: 'nx-examples',
+      label: 'Nx Examples',
+      url: 'assets/graphs/nx-examples.json',
+    },
+    {
+      id: 'sub-apps',
+      label: 'Sub Apps',
+      url: 'assets/graphs/sub-apps.json',
+    },
+    {
+      id: 'storybook',
+      label: 'Storybook',
+      url: 'assets/graphs/storybook.json',
+    },
+  ],
+  defaultProjectGraph: 'nx',
+};

dep-graph/dep-graph/src/assets/environment.watch.js

@@ -0,0 +1,18 @@
+window.exclude = [];
+window.focusedProject = null;
+window.groupByFolder = false;
+window.watch = true;
+window.environment = 'watch';
+window.useXstateInspect = false;
+
+window.appConfig = {
+  showDebugger: false,
+  projectGraphs: [
+    {
+      id: 'local',
+      label: 'local',
+      url: 'projectGraph.json',
+    },
+  ],
+  defaultProjectGraph: 'local',
+};

dep-graph/dep-graph/src/environments/environment.dev.ts

@@ -1,13 +0,0 @@
-import { FetchProjectGraphService } from '../app/fetch-project-graph-service';
-import { Environment } from '../app/models';
-import { projectGraphs } from '../graphs';
-
-export const environment: Environment = {
-  environment: 'dev',
-  appConfig: {
-    showDebugger: true,
-    projectGraphs,
-    defaultProjectGraph: 'nx',
-    projectGraphService: new FetchProjectGraphService(),
-  },
-};

dep-graph/dep-graph/src/environments/environment.ts

@@ -1,18 +0,0 @@
-import { FetchProjectGraphService } from '../app/fetch-project-graph-service';
-import { Environment } from '../app/models';
-
-export const environment: Environment = {
-  environment: 'release',
-  appConfig: {
-    showDebugger: false,
-    projectGraphs: [
-      {
-        id: 'local',
-        label: 'local',
-        url: 'projectGraph.json',
-      },
-    ],
-    defaultProjectGraph: 'local',
-    projectGraphService: new FetchProjectGraphService(),
-  },
-};

dep-graph/dep-graph/src/environments/environment.watch.ts

@@ -1,18 +0,0 @@
-import { MockProjectGraphService } from '../app/mock-project-graph-service';
-import { Environment } from '../app/models';
-
-export const environment: Environment = {
-  environment: 'dev-watch',
-  appConfig: {
-    showDebugger: false,
-    projectGraphs: [
-      {
-        id: 'local',
-        label: 'local',
-        url: 'projectGraph.json',
-      },
-    ],
-    defaultProjectGraph: 'local',
-    projectGraphService: new MockProjectGraphService(),
-  },
-};

dep-graph/dep-graph/src/globals.d.ts

@@ -2,27 +2,19 @@
 import { DepGraphClientResponse } from '@nrwl/workspace/src/command-line/dep-graph';
 import { ProjectGraph, ProjectGraphNode } from '@nrwl/devkit';
 import { ProjectGraphList } from './graphs';
+import { AppConfig } from './app/models';
 
 export declare global {
   export interface Window {
-    watch: boolean;
-    projects: ProjectGraphNode[];
-    graph: ProjectGraph;
-    filteredProjects: ProjectGraphNode[];
-    affected: string[];
     exclude: string[];
     focusedProject: string;
     groupByFolder: boolean;
-    focusProject: Function;
+    watch: boolean;
-    excludeProject: Function;
-    projectGraphList: ProjectGraphList[];
-    selectedProjectGraph: string;
-    workspaceLayout: {
-      libsDir: string;
-      appsDir: string;
-    };
-    projectGraphResponse: DepGraphClientResponse;
     localMode: 'serve' | 'build';
+    projectGraphResponse?: DepGraphClientResponse;
+    environment: 'dev' | 'watch' | 'release';
+    appConfig: AppConfig;
+    useXstateInspect: boolean = false;
   }
 }
 

dep-graph/dep-graph/src/index.html

@@ -10,6 +10,8 @@
     href="https://fonts.googleapis.com/css?family=Montserrat&display=swap"
     rel="stylesheet"
   />
+
+  <script id="environment" src="environment.js"></script>
 </head>
 <body>
   <svg xmlns="http://www.w3.org/2000/svg" style="display: none">
@@ -143,17 +145,4 @@
       <div id="graph-container"></div>
     </div>
   </div>
-  <script>
-    window.watch = false;
-    window.projects = [];
-    window.graph = {};
-    window.affected = [];
-    window.focusedProject = null;
-    window.filteredProjects = [];
-    window.groupByFolder = false;
-    window.exclude = [];
-    window.workspaceLayout = null;
-    window.localMode = 'serve';
-    window.projectGraphResponse = null;
-  </script>
 </body>

dep-graph/dep-graph/src/main.ts

@@ -1,13 +1,29 @@
 import { AppComponent } from './app/app';
 import { LocalProjectGraphService } from './app/local-project-graph-service';
-import { environment } from './environments/environment';
+import { inspect } from '@xstate/inspect';
+import { ProjectGraphService } from './app/models';
+import { MockProjectGraphService } from './app/mock-project-graph-service';
+import { FetchProjectGraphService } from './app/fetch-project-graph-service';
 
-if (environment.environment === 'dev-watch') {
+if (window.useXstateInspect === true) {
-  window.watch = true;
+  inspect({
+    url: 'https://stately.ai/viz?inspect',
+    iframe: false, // open in new window
+  });
 }
 
-if (environment.environment === 'release' && window.localMode === 'build') {
+let projectGraphService: ProjectGraphService;
-  environment.appConfig.projectGraphService = new LocalProjectGraphService();
+
+if (window.environment === 'dev') {
+  projectGraphService = new FetchProjectGraphService();
+} else if (window.environment === 'watch') {
+  projectGraphService = new MockProjectGraphService();
+} else if (window.environment === 'release') {
+  if (window.localMode === 'build') {
+    projectGraphService = new LocalProjectGraphService();
+  } else {
+    projectGraphService = new FetchProjectGraphService();
+  }
 }
 
-setTimeout(() => new AppComponent(environment.appConfig));
+setTimeout(() => new AppComponent(window.appConfig, projectGraphService));

package.json

@@ -116,6 +116,8 @@
     "@typescript-eslint/eslint-plugin": "~4.33.0",
     "@typescript-eslint/experimental-utils": "~4.33.0",
     "@typescript-eslint/parser": "~4.33.0",
+    "@xstate/immer": "^0.2.0",
+    "@xstate/inspect": "^0.5.1",
     "angular": "1.8.0",
     "autoprefixer": "^10.2.5",
     "babel-jest": "27.2.3",
@@ -136,8 +138,8 @@
     "cz-customizable": "^6.2.0",
     "depcheck": "^1.3.1",
     "dotenv": "~10.0.0",
-    "enhanced-resolve": "^5.8.3",
     "ejs": "^3.1.5",
+    "enhanced-resolve": "^5.8.3",
     "eslint": "7.32.0",
     "eslint-config-next": "^12.0.0",
     "eslint-config-prettier": "^8.1.0",
@@ -158,6 +160,7 @@
     "husky": "^6.0.0",
     "identity-obj-proxy": "3.0.0",
     "ignore": "^5.0.4",
+    "immer": "^9.0.6",
     "import-fresh": "^3.1.0",
     "injection-js": "^2.4.0",
     "is-ci": "^3.0.0",
@@ -254,6 +257,7 @@
     "webpack-sources": "^3.0.2",
     "webpack-subresource-integrity": "^1.5.2",
     "worker-plugin": "3.2.0",
+    "xstate": "^4.25.0",
     "yargs": "15.4.1",
     "yargs-parser": "20.0.0",
     "zone.js": "~0.11.4"

packages/workspace/src/command-line/dep-graph.ts

@@ -20,10 +20,6 @@ import {
   ProjectGraphNode,
   pruneExternalNodes,
 } from '../core/project-graph';
-import {
-  cacheDirectory,
-  readCacheDirectoryProperty,
-} from '../utilities/cache-directory';
 import { writeJsonFile } from '../utilities/fileutils';
 import { output } from '../utilities/output';
 
@@ -32,9 +28,6 @@ export interface DepGraphClientResponse {
   projects: ProjectGraphNode[];
   dependencies: Record<string, ProjectGraphDependency[]>;
   layout: { appsDir: string; libsDir: string };
-  changes: {
-    added: string[];
-  };
   affected: string[];
   focus: string;
   groupByFolder: boolean;
@@ -59,74 +52,46 @@ const mimeType = {
   '.ttf': 'aplication/font-sfnt',
 };
 
-const nxDepsDir = cacheDirectory(
+function buildEnvironmentJs(
-  appRootPath,
+  exclude: string[],
-  readCacheDirectoryProperty(appRootPath)
-);
-
-async function projectsToHtml(
-  projects: ProjectGraphNode[],
-  graph: ProjectGraph,
-  affected: string[],
   focus: string,
   groupByFolder: boolean,
-  exclude: string[],
+  watchMode: boolean,
-  layout: { appsDir: string; libsDir: string },
+  localMode: 'build' | 'serve',
-  localMode: 'serve' | 'build',
+  depGraphClientResponse?: DepGraphClientResponse
-  watchMode: boolean = false
 ) {
-  let f = readFileSync(
+  let environmentJs = `window.exclude = ${JSON.stringify(exclude)};
-    join(__dirname, '../core/dep-graph/index.html'),
+  window.groupByFolder = ${!!groupByFolder};
-    'utf-8'
+  window.watch = ${!!watchMode};
-  );
+  window.environment = 'release';
+  window.localMode = '${localMode}';
   
-  f = f
+  window.appConfig = {
-    .replace(
+    showDebugger: false,
-      `window.projects = []`,
+    projectGraphs: [
-      `window.projects = ${JSON.stringify(projects)}`
+      {
-    )
+        id: 'local',
-    .replace(`window.graph = {}`, `window.graph = ${JSON.stringify(graph)}`)
+        label: 'local',
-    .replace(
+        url: 'projectGraph.json',
-      `window.affected = []`,
+      }
-      `window.affected = ${JSON.stringify(affected)}`
+    ],
-    )
+    defaultProjectGraph: 'local',
-    .replace(
+  };
-      `window.groupByFolder = false`,
+  `;
-      `window.groupByFolder = ${!!groupByFolder}`
-    )
-    .replace(
-      `window.exclude = []`,
-      `window.exclude = ${JSON.stringify(exclude)}`
-    )
-    .replace(
-      `window.workspaceLayout = null`,
-      `window.workspaceLayout = ${JSON.stringify(layout)}`
-    );
-
-  if (focus) {
-    f = f.replace(
-      `window.focusedProject = null`,
-      `window.focusedProject = '${focus}'`
-    );
-  }
-
-  if (watchMode) {
-    f = f.replace(`window.watch = false`, `window.watch = true`);
-  }
 
   if (localMode === 'build') {
-    currentDepGraphClientResponse = await createDepGraphClientResponse();
+    environmentJs += `window.projectGraphResponse = ${JSON.stringify(
-    f = f.replace(
+      depGraphClientResponse
-      `window.projectGraphResponse = null`,
+    )};`;
-      `window.projectGraphResponse = ${JSON.stringify(
+  } else {
-        currentDepGraphClientResponse
+    environmentJs += `window.projectGraphResponse = null;`;
-      )}`
-    );
-
-    f = f.replace(`window.localMode = 'serve'`, `window.localMode = 'build'`);
   }
 
-  return f;
+  if (!!focus) {
+    environmentJs += `window.focusedProject = '${focus}';`;
+  }
+
+  return environmentJs;
 }
 
 function projectExists(projects: ProjectGraphNode[], projectToFind: string) {
@@ -242,23 +207,12 @@ export async function generateGraph(
     }
   }
 
-  let html: string;
+  let html = readFileSync(
+    join(__dirname, '../core/dep-graph/index.html'),
+    'utf-8'
+  );
 
-  if (!args.file || extname(args.file) === '.html') {
+  graph = filterGraph(graph, args.focus || null, args.exclude || []);
-    html = await projectsToHtml(
-      projects,
-      graph,
-      affectedProjects,
-      args.focus || null,
-      args.groupByFolder || false,
-      args.exclude || [],
-      layout,
-      !!args.file && args.file.endsWith('html') ? 'build' : 'serve',
-      args.watch
-    );
-  } else {
-    graph = filterGraph(graph, args.focus || null, args.exclude || []);
-  }
 
   if (args.file) {
     const workspaceFolder = appRootPath;
@@ -281,14 +235,23 @@ export async function generateGraph(
         },
       });
 
-      currentDepGraphClientResponse = await createDepGraphClientResponse();
+      const depGraphClientResponse = await createDepGraphClientResponse();
 
+      const environmentJs = buildEnvironmentJs(
+        args.exclude || [],
+        args.focus || null,
+        args.groupByFolder || false,
+        args.watch,
+        !!args.file && args.file.endsWith('html') ? 'build' : 'serve',
+        depGraphClientResponse
+      );
       html = html.replace(/src="/g, 'src="static/');
       html = html.replace(/href="styles/g, 'href="static/styles');
       html = html.replace('<base href="/" />', '');
       html = html.replace(/type="module"/g, '');
 
       writeFileSync(fullFilePath, html);
+      writeFileSync(join(assetsFolder, 'environment.js'), environmentJs);
 
       output.success({
         title: `HTML output created in ${fileFolderPath}`,
@@ -315,8 +278,17 @@ export async function generateGraph(
       process.exit(1);
     }
   } else {
+    const environmentJs = buildEnvironmentJs(
+      args.exclude || [],
+      args.focus || null,
+      args.groupByFolder || false,
+      args.watch,
+      !!args.file && args.file.endsWith('html') ? 'build' : 'serve'
+    );
+
     await startServer(
       html,
+      environmentJs,
       args.host || '127.0.0.1',
       args.port || 4211,
       args.watch,
@@ -331,6 +303,7 @@ export async function generateGraph(
 
 async function startServer(
   html: string,
+  environmentJs: string,
   host: string,
   port = 4211,
   watchForchanges = false,
@@ -372,6 +345,12 @@ async function startServer(
       return;
     }
 
+    if (sanitizePath === 'environment.js') {
+      res.writeHead(200, { 'Content-Type': 'application/javascript' });
+      res.end(environmentJs);
+      return;
+    }
+
     let pathname = join(__dirname, '../core/dep-graph/', sanitizePath);
 
     if (!existsSync(pathname)) {
@@ -383,7 +362,6 @@ async function startServer(
 
     // if is a directory, then look for index.html
     if (statSync(pathname).isDirectory()) {
-      // pathname += '/index.html';
       res.writeHead(200, { 'Content-Type': 'text/html' });
       res.end(html);
       return;
@@ -420,9 +398,6 @@ let currentDepGraphClientResponse: DepGraphClientResponse = {
     appsDir: '',
     libsDir: '',
   },
-  changes: {
-    added: [],
-  },
   affected: [],
   focus: null,
   groupByFolder: false,
@@ -522,21 +497,6 @@ async function createDepGraphClientResponse(): Promise<DepGraphClientResponse> {
 
   const hash = hasher.digest('hex');
 
-  let added = [];
-
-  if (
-    currentDepGraphClientResponse.hash !== null &&
-    hash !== currentDepGraphClientResponse.hash
-  ) {
-    added = projects
-      .filter((project) => {
-        const result = currentDepGraphClientResponse.projects.find(
-          (previousProject) => previousProject.name === project.name
-        );
-        return !result;
-      })
-      .map((project) => project.name);
-  }
   performance.mark('dep graph response generation:end');
 
   performance.measure(
@@ -557,8 +517,5 @@ async function createDepGraphClientResponse(): Promise<DepGraphClientResponse> {
     layout,
     projects,
     dependencies,
-    changes: {
-      added: [...currentDepGraphClientResponse.changes.added, ...added],
-    },
   };
 }

scripts/copy-dep-graph-environment.ts

@@ -0,0 +1,12 @@
+import { copyFileSync } from 'fs';
+import { argv } from 'yargs';
+
+type Mode = 'dev' | 'watch';
+const mode = argv._[0];
+
+console.log(`Setting up dep-graph for ${mode}`);
+
+copyFileSync(
+  `dep-graph/dep-graph/src/assets/environment.${mode}.js`,
+  `dep-graph/dep-graph/src/assets/environment.js`
+);

yarn.lock

@@ -5392,6 +5392,18 @@
     "@webassemblyjs/wast-parser" "1.9.0"
     "@xtuc/long" "4.2.2"
 
+"@xstate/immer@^0.2.0":
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/@xstate/immer/-/immer-0.2.0.tgz#4f128947c3cbb3e68357b886485a36852d4e06b3"
+  integrity sha512-ZKwAwS84kfmN108lEtVHw8jztKDiFeaQsTxkOlOghpK1Lr7+13G8HhZZXyN1/pVkplloUUOPMH5EXVtitZDr8w==
+
+"@xstate/inspect@^0.5.1":
+  version "0.5.1"
+  resolved "https://registry.yarnpkg.com/@xstate/inspect/-/inspect-0.5.1.tgz#12dbed78e6123e407458fde322273e7a64650f1e"
+  integrity sha512-m1zKFzyV/skUfpdiO/52w9o5EUporqIYEevryjcPpUEiIjVXKgti3EXl8TfXxggeNmsa2H9P0M0wZ5alM8M3Ng==
+  dependencies:
+    fast-safe-stringify "^2.0.7"
+
 "@xtuc/ieee754@^1.2.0":
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/@xtuc/ieee754/-/ieee754-1.2.0.tgz#eef014a3145ae477a1cbc00cd1e552336dceb790"
@@ -10588,7 +10600,7 @@ fast-redact@^3.0.0:
   resolved "https://registry.yarnpkg.com/fast-redact/-/fast-redact-3.0.2.tgz#c940ba7162dde3aeeefc522926ae8c5231412904"
   integrity sha512-YN+CYfCVRVMUZOUPeinHNKgytM1wPI/C/UCLEi56EsY2dwwvI00kIJHJoI7pMVqGoMew8SMZ2SSfHKHULHXDsg==
 
-fast-safe-stringify@2.1.1, fast-safe-stringify@^2.0.8:
+fast-safe-stringify@2.1.1, fast-safe-stringify@^2.0.7, fast-safe-stringify@^2.0.8:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/fast-safe-stringify/-/fast-safe-stringify-2.1.1.tgz#c406a83b6e70d9e35ce3b30a81141df30aeba884"
   integrity sha512-W+KJc2dmILlPplD/H4K9l9LcAHAfPtP6BY84uVLXQ6Evcz9Lcg33Y2z1IVblT6xdY54PXYVHEv+0Wpq8Io6zkA==
@@ -12354,7 +12366,7 @@ immer@8.0.1:
   resolved "https://registry.yarnpkg.com/immer/-/immer-8.0.1.tgz#9c73db683e2b3975c424fb0572af5889877ae656"
   integrity sha512-aqXhGP7//Gui2+UrEtvxZxSquQVXTpZ7KDxfCcKAF3Vysvw0CViVaW9RZ1j1xlIYqaaaipBoqdqeibkc18PNvA==
 
-immer@^9.0.1:
+immer@^9.0.1, immer@^9.0.6:
   version "9.0.6"
   resolved "https://registry.yarnpkg.com/immer/-/immer-9.0.6.tgz#7a96bf2674d06c8143e327cbf73539388ddf1a73"
   integrity sha512-G95ivKpy+EvVAnAab4fVa4YGYn24J1SpEktnJX7JJ45Bd7xqME/SCplFzYFmTbrkwZbQ4xJK1xMTUYBkN6pWsQ==
@@ -22960,6 +22972,11 @@ xmlhttprequest-ssl@~1.5.4, xmlhttprequest-ssl@~1.6.2:
   resolved "https://registry.yarnpkg.com/xmlhttprequest-ssl/-/xmlhttprequest-ssl-1.6.3.tgz#03b713873b01659dfa2c1c5d056065b27ddc2de6"
   integrity sha512-3XfeQE/wNkvrIktn2Kf0869fC0BN6UpydVasGIeSm2B1Llihf7/0UfZM+eCkOw3P7bP4+qPgqhm7ZoxuJtFU0Q==
 
+xstate@^4.25.0:
+  version "4.25.0"
+  resolved "https://registry.yarnpkg.com/xstate/-/xstate-4.25.0.tgz#d902ef33137532043f7a88597af8e5e1c7ad6bdf"
+  integrity sha512-qP7lc/ypOuuWME4ArOBnzaCa90TfHkjiqYDmxpiCjPy6FcXstInA2vH6qRVAHbPXRK4KQIYfIEOk1X38P+TldQ==
+
 xtend@^4.0.0, xtend@^4.0.1, xtend@^4.0.2, xtend@~4.0.1:
   version "4.0.2"
   resolved "https://registry.yarnpkg.com/xtend/-/xtend-4.0.2.tgz#bb72779f5fa465186b1f438f674fa347fdb5db54"