Add real-time collab support to code editor

2021-04-22 10:49:31 -05:00 · 2021-04-22 10:49:31 -05:00 · 48c045e952
commit 48c045e952
parent 7be3bf5259
6 changed files with 647 additions and 2 deletions
--- a/package.json
+++ b/package.json
@ -22,6 +22,9 @@
    "@angular/router": "~10.1.5",
    "@angular/service-worker": "~10.1.5",
    "@circlon/angular-tree-component": "^10.0.0",
+    "@ckeditor/ckeditor5-angular": "^2.0.1",
+    "@ckeditor/ckeditor5-build-decoupled-document": "^27.0.0",
+    "@convergencelabs/monaco-collab-ext": "^0.3.2",
    "@fortawesome/fontawesome-free": "^5.15.1",
    "@ionic-native/core": "^5.0.0",
    "@ionic-native/splash-screen": "^5.0.0",
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@ -8,6 +8,9 @@ dependencies:
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  '@ionic-native/core': 5.31.1_rxjs@6.6.3
  '@ionic-native/splash-screen': 5.31.1_fba2ce20a1445ab520b44b573ed379a0
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+    engines:
+      node: '>=12.0.0'
+      npm: '>=5.7.1'
+    resolution:
+      integrity: sha512-KjAjA/K5sNZ2UOaD3qxYiEv23TUdsZdNgDSMUiMjaFNv7bkoPZ4p8fEM4squzzB6VupLSjDw31WmTPF7Sf0KrA==
  /class-utils/0.3.6:
    dependencies:
      arr-union: 3.1.0
@ -6620,6 +7015,10 @@ packages:
    dev: false
    resolution:
      integrity: sha512-JD1COMZsq8maT6mnuz1UMV0jvYD0E0aUsSOdrr1/nAG3dhqQXwRRgeW0cSqH1U43INKcqxaiVIQNOUDld7gRDA==
+  /lodash-es/4.17.21:
+    dev: false
+    resolution:
+      integrity: sha512-mKnC+QJ9pWVzv+C4/U3rRsHapFfHvQFoFB92e52xeyGMcX6/OlIl78je1u8vePzYZSkkogMPJ2yjxxsb89cxyw==
  /lodash._baseassign/3.2.0:
    dependencies:
      lodash._basecopy: 3.0.1
@ -7104,6 +7503,10 @@ packages:
    dev: false
    resolution:
      integrity: sha512-kHmoybcPV8Sqy59DwNDY3Jefr64lK/by/da0ViFcuA4DH0vQg5Q6Ze5VimxkfQNSC+Mls/Kx53s7TjP1RhFEDQ==
+  /monaco-editor/0.23.0:
+    dev: false
+    resolution:
+      integrity: sha512-q+CP5zMR/aFiMTE9QlIavGyGicKnG2v/H8qVvybLzeFsARM8f6G9fL0sMST2tyVYCwDKkGamZUI6647A0jR/Lg==
  /move-concurrently/1.0.1:
    dependencies:
      aproba: 1.2.0
@ -10335,6 +10738,10 @@ packages:
  /tslib/2.1.0:
    resolution:
      integrity: sha512-hcVC3wYEziELGGmEEXue7D75zbwIIVUMWAVbHItGPx0ziyXxrOMQx4rQEVEV45Ut/1IotuEvwqPopzIOkDMf0A==
+  /tslib/2.2.0:
+    dev: false
+    resolution:
+      integrity: sha512-gS9GVHRU+RGn5KQM2rllAlR3dU6m7AcpJKdtH8gFvQiC4Otgk98XnmMU+nZenHt/+VhnBPWwgrJsyrdcw6i23w==
  /tslint/5.15.0_typescript@4.0.7:
    dependencies:
      babel-code-frame: 6.26.0
@ -11205,6 +11612,9 @@ specifiers:
  '@angular/router': ~10.1.5
  '@angular/service-worker': ~10.1.5
  '@circlon/angular-tree-component': ^10.0.0
+  '@ckeditor/ckeditor5-angular': ^2.0.1
+  '@ckeditor/ckeditor5-build-decoupled-document': ^27.0.0
+  '@convergencelabs/monaco-collab-ext': ^0.3.2
  '@fortawesome/fontawesome-free': ^5.15.1
  '@ionic-native/core': ^5.0.0
  '@ionic-native/splash-screen': ^5.0.0
--- a/src/app/components/editor/code/code.component.ts
+++ b/src/app/components/editor/code/code.component.ts
@ -1,16 +1,50 @@
-import {Component, ElementRef, Input, OnInit, ViewChild} from '@angular/core';
+import {Component, ElementRef, Input, OnDestroy, OnInit, ViewChild} from '@angular/core';
 import {v4} from 'uuid';
 import {ApiService, ResourceNotAvailableOfflineError} from '../../../service/api.service';
 import {EditorNodeContract} from '../../nodes/EditorNode.contract';
 import {EditorService} from '../../../service/editor.service';
 import {EditorComponent} from 'ngx-monaco-editor';
+import * as MonacoCollabExt from '@convergencelabs/monaco-collab-ext';
+import {FlitterSocketConnection, FlitterSocketServerClientTransaction} from '../../../flitter-socket';
+import {debug} from '../../../utility';
+import {environment} from "../../../../environments/environment";
+
+export interface RemoteUser {
+    uuid: string;
+    uid: string;
+    display: string;
+    color: string;
+    cursor?: any;
+    selection?: any;
+}
+
+export interface RemoteInsertOperation {
+    type: 'insert';
+    index: number;
+    text: string;
+}
+
+export interface RemoteReplaceOperation {
+    type: 'replace';
+    index: number;
+    text: string;
+    length: number;
+}
+
+export interface RemoteDeleteOperation {
+    type: 'delete';
+    index: number;
+    length: number;
+}
+
+export type RemoteOperation = RemoteInsertOperation | RemoteReplaceOperation | RemoteDeleteOperation;

@Component({
    selector: 'editor-code',
    templateUrl: './code.component.html',
    styleUrls: ['./code.component.scss'],
 })
-export class CodeComponent extends EditorNodeContract implements OnInit {
+export class CodeComponent extends EditorNodeContract implements OnInit, OnDestroy {
    @Input() nodeId: string;
    @Input() editorUUID?: string;
    @ViewChild('theEditor') theEditor: EditorComponent;
@ -21,6 +55,15 @@ export class CodeComponent extends EditorNodeContract implements OnInit {
    public notAvailableOffline = false;
    public containerHeight = 540;

+    protected cursorManager?: MonacoCollabExt.RemoteCursorManager;
+    protected selectionManager?: MonacoCollabExt.RemoteSelectionManager;
+    protected contentManager?: MonacoCollabExt.EditorContentManager;
+
+    protected remoteUsers: RemoteUser[] = [];
+    protected localUser?: RemoteUser;
+    protected socket?: FlitterSocketConnection;
+    protected editorGroupID!: string;
+
    public editorOptions = {
        theme: this.isDark() ? 'vs-dark' : 'vs',
        language: 'javascript',
@ -199,9 +242,36 @@ export class CodeComponent extends EditorNodeContract implements OnInit {

    ngOnInit() {
        this.editorService = this.editorService.getEditor(this.editorUUID);
+
        this.editorService.registerNodeEditor(this.nodeId, this).then(() => {
            this.editorOptions.readOnly = !this.editorService.canEdit();
        });
+
+        const url = `${environment.websocketBase}/api/v1/socket/code/.websocket`;
+        debug(`Editor socket URL: ${url}`);
+
+        if ( !this.editorService.isVersion() ) {
+            const socket = new FlitterSocketConnection(url);
+            socket.controller(this);
+
+            socket.on_open().then(() => {
+                debug('Connected to code editor socket', socket);
+                socket.asyncRequest('subscribe', { resource_id: this.node.Value.Value }).then(([transaction, _, data]) => {
+                    debug('Subscribed to editor group:', data);
+                    if ( data.editor_group_id ) {
+                        this.editorGroupID = data.editor_group_id;
+                        this.socket = socket;
+                        this.localUser = data.local_user;
+                    }
+                });
+            });
+        }
+    }
+
+    ngOnDestroy() {
+        if ( this.socket ) {
+            this.socket.socket.close();
+        }
    }

    onMonacoEditorInit(editor) {
@ -218,8 +288,164 @@ export class CodeComponent extends EditorNodeContract implements OnInit {
            }
        };

+        editor.onDidChangeCursorPosition(event => {
+            this.socket?.asyncRequest('update_cursor', {
+                position: event.position,
+                uuid: this.localUser?.uuid,
+                editor_group_id: this.editorGroupID,
+            });
+        });
+
+        editor.onDidChangeCursorSelection(event => {
+            this.socket?.asyncRequest('update_selection', {
+                startPosition: {
+                    lineNumber: event.selection.startLineNumber,
+                    column: event.selection.startColumn,
+                },
+                endPosition: {
+                    lineNumber: event.selection.endLineNumber,
+                    column: event.selection.endColumn,
+                },
+                uuid: this.localUser?.uuid,
+                editor_group_id: this.editorGroupID,
+            });
+        });
+
        editor.onDidContentSizeChange(updateHeight);
        updateHeight();
+
+        this.cursorManager = new MonacoCollabExt.RemoteCursorManager({
+            editor,
+            tooltips: true,
+            tooltipDuration: 2,
+        });
+
+        this.selectionManager = new MonacoCollabExt.RemoteSelectionManager({ editor });
+
+        this.contentManager = new MonacoCollabExt.EditorContentManager({
+            editor,
+            onInsert: (index, text) => {
+                if ( this.readonly ) {
+                    return;
+                }
+
+                this.socket?.asyncRequest('apply', {
+                    editor_group_id: this.editorGroupID,
+                    operations: [
+                        {
+                            type: 'insert',
+                            index,
+                            text,
+                        },
+                    ],
+                });
+            },
+            onReplace: (index, length, text) => {
+                if ( this.readonly ) {
+                    return;
+                }
+
+                this.socket?.asyncRequest('apply', {
+                    editor_group_id: this.editorGroupID,
+                    operations: [
+                        {
+                            type: 'replace',
+                            index,
+                            text,
+                            length,
+                        },
+                    ],
+                });
+            },
+            onDelete: (index, length) => {
+                if ( this.readonly ) {
+                    return;
+                }
+
+                this.socket?.asyncRequest('apply', {
+                    editor_group_id: this.editorGroupID,
+                    operations: [
+                        {
+                            type: 'delete',
+                            index,
+                            length,
+                        },
+                    ],
+                });
+            },
+        });
+    }
+
+    applyOperation(op: RemoteOperation) {
+        if ( op.type === 'insert' ) {
+            this.contentManager?.insert(op.index, op.text);
+        } else if ( op.type === 'replace' ) {
+            this.contentManager?.replace(op.index, op.length, op.text);
+        } else if ( op.type === 'delete' ) {
+            this.contentManager?.delete(op.index, op.length);
+        }
+    }
+
+    async applyRemoteOperation(transaction: FlitterSocketServerClientTransaction, connection: FlitterSocketConnection) {
+        const ops: RemoteOperation[] = transaction.incoming.operations || [];
+        for ( const op of ops ) {
+            this.applyOperation(op);
+        }
+    }
+
+    async updateCursorPosition(transaction: FlitterSocketServerClientTransaction, connection: FlitterSocketConnection) {
+        const position = transaction.incoming.position;
+        const uuid = transaction.incoming.uuid;
+
+        for ( const user of this.remoteUsers ) {
+            if ( user.uuid === uuid ) {
+                user.cursor?.setPosition(position);
+            }
+        }
+    }
+
+    async updateSelection(transaction: FlitterSocketServerClientTransaction, connection: FlitterSocketConnection) {
+        const startPosition = transaction.incoming.startPosition;
+        const endPosition = transaction.incoming.endPosition;
+        const uuid = transaction.incoming.uuid;
+
+        for ( const user of this.remoteUsers ) {
+            if ( user.uuid === uuid ) {
+                if ( startPosition && endPosition ) {
+                    user.selection?.setPositions(startPosition, endPosition);
+                    user.selection?.show();
+                } else {
+                    user.selection?.hide();
+                }
+            }
+        }
+    }
+
+    async setEditorGroupUsers(transaction: FlitterSocketServerClientTransaction, connection: FlitterSocketConnection) {
+        const remoteUsers: RemoteUser[] = Array.isArray(transaction.incoming?.users) ? transaction.incoming.users : [];
+        console.log('set editor group users', remoteUsers, transaction);
+        for ( const user of this.remoteUsers ) {
+            this.cursorManager?.removeCursor(user.uuid);
+            user.cursor?.dispose();
+            delete user.cursor;
+
+            this.selectionManager?.removeSelection(user.uuid);
+            user.selection?.dispose();
+            delete user.selection;
+        }
+
+        while ( !this.cursorManager ) {
+            await new Promise(r => setTimeout(r, 500));
+        }
+
+        this.remoteUsers = remoteUsers;
+        for ( const user of this.remoteUsers ) {
+            user.cursor = this.cursorManager?.addCursor(user.uuid, user.color, user.display);
+            user.cursor?.setOffset(0);
+            user.cursor?.show();
+
+            user.selection = this.selectionManager?.addSelection(user.uuid, user.color);
+        }
    }

    public onEditorModelChange($event) {
--- a/src/app/service/editor.service.ts
+++ b/src/app/service/editor.service.ts
@ -135,6 +135,10 @@ export class EditorService {
        await this.startEditing(this.currentPageId);
    }

+    isVersion() {
+        return !!this.currentPageVersion;
+    }
+
    async startEditing(pageId: string, version?: number) {
        if ( this.currentPage ) {
            await this.stopEditing();
--- a/src/environments/environment.prod.ts
+++ b/src/environments/environment.prod.ts
@ -8,4 +8,5 @@ export const environment = {
  starshipUrl: '/auth/starship_oauth/login',
  appBase: '/i/',
  outputDebug: false,
+  websocketBase: '',
 };
--- a/src/environments/environment.ts
+++ b/src/environments/environment.ts
@ -12,6 +12,7 @@ export const environment = {
  starshipUrl: '/link_api/auth/starship_oauth/login',
  appBase: '/',
  outputDebug: true,
+  websocketBase: 'ws://localhost:8000'
 };

 /*