884 lines
		
	
	
		
			22 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
			
		
		
	
	
			884 lines
		
	
	
		
			22 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
| # 💻 EXEMPLES DE CODE — Diffs Ciblés (5+ exemples copier-coller)
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| 
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| ## Exemple 1: CDK Virtual Scroll pour Résultats de Recherche
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| 
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| ### Fichier: `src/components/search-results/search-results.component.ts`
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| 
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| **AVANT (rendu complet):**
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| ```typescript
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| @Component({
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|   selector: 'app-search-results',
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|   template: `
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|     <div class="results-list">
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|       @for (note of results(); track note.id) {
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|         <app-note-card [note]="note" (click)="selectNote(note)">
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|         </app-note-card>
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|       }
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|     </div>
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|   `,
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|   changeDetection: ChangeDetectionStrategy.OnPush
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| })
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| export class SearchResultsComponent {
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|   results = input.required<Note[]>();
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|   noteSelected = output<Note>();
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|   
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|   selectNote(note: Note): void {
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|     this.noteSelected.emit(note);
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|   }
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| }
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| ```
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| 
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| **APRÈS (avec Virtual Scroll):**
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| ```typescript
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| import { CdkVirtualScrollViewport, ScrollingModule } from '@angular/cdk/scrolling';
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| 
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| @Component({
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|   selector: 'app-search-results',
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|   imports: [CommonModule, ScrollingModule, NoteCardComponent],
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|   template: `
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|     <cdk-virtual-scroll-viewport
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|       [itemSize]="80"
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|       class="results-viewport h-full">
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|       
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|       @if (results().length === 0) {
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|         <div class="empty-state p-8 text-center text-gray-500">
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|           Aucun résultat trouvé
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|         </div>
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|       }
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|       
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|       <div *cdkVirtualFor="let note of results(); 
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|                            trackBy: trackByNoteId; 
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|                            templateCacheSize: 0"
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|            class="result-item">
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|         <app-note-card 
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|           [note]="note" 
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|           (click)="selectNote(note)">
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|         </app-note-card>
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|       </div>
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|       
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|     </cdk-virtual-scroll-viewport>
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|   `,
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|   styles: [`
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|     .results-viewport {
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|       height: 100%;
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|       width: 100%;
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|     }
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|     .result-item {
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|       height: 80px; /* Match itemSize */
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|       padding: 0.5rem;
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|     }
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|   `],
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|   changeDetection: ChangeDetectionStrategy.OnPush
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| })
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| export class SearchResultsComponent {
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|   results = input.required<Note[]>();
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|   noteSelected = output<Note>();
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|   
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|   selectNote(note: Note): void {
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|     this.noteSelected.emit(note);
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|   }
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|   
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|   // CRITICAL: trackBy optimizes change detection
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|   trackByNoteId(index: number, note: Note): string {
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|     return note.id;
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|   }
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| }
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| ```
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| 
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| **Gain attendu:** 
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| - DOM nodes: 500 → ~15 (97% réduction)
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| - Scroll FPS: 30 → 60
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| - Temps rendu initial: 800ms → 50ms
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| 
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| ---
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| 
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| ## Exemple 2: Web Worker pour Parsing Markdown
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| 
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| ### Fichier: `src/services/markdown.worker.ts` (NOUVEAU)
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| 
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| ```typescript
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| /// <reference lib="webworker" />
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| 
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| import MarkdownIt from 'markdown-it';
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| import markdownItAnchor from 'markdown-it-anchor';
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| import markdownItTaskLists from 'markdown-it-task-lists';
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| import markdownItAttrs from 'markdown-it-attrs';
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| import markdownItFootnote from 'markdown-it-footnote';
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| import markdownItMultimdTable from 'markdown-it-multimd-table';
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| import hljs from 'highlight.js';
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| 
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| interface ParseRequest {
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|   id: string;
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|   markdown: string;
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|   options?: {
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|     currentNotePath?: string;
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|     attachmentsBase?: string;
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|   };
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| }
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| 
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| interface ParseResponse {
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|   id: string;
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|   html: string;
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|   error?: string;
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| }
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| 
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| // Initialize MarkdownIt (reuse across requests)
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| const md = new MarkdownIt({
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|   html: true,
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|   linkify: false,
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|   typographer: false,
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|   breaks: false,
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|   highlight: (code, lang) => {
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|     if (lang && hljs.getLanguage(lang)) {
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|       return hljs.highlight(code, { language: lang }).value;
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|     }
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|     return hljs.highlightAuto(code).value;
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|   }
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| });
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| 
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| md.use(markdownItAnchor, { slugify: slugify, tabIndex: false });
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| md.use(markdownItTaskLists, { enabled: false });
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| md.use(markdownItMultimdTable, { multiline: true, rowspan: true, headerless: true });
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| md.use(markdownItFootnote);
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| md.use(markdownItAttrs, {
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|   leftDelimiter: '{',
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|   rightDelimiter: '}',
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|   allowedAttributes: ['id', 'class']
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| });
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| 
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| // Message handler
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| self.addEventListener('message', (event: MessageEvent<ParseRequest>) => {
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|   const { id, markdown, options } = event.data;
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|   
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|   try {
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|     const html = md.render(markdown);
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|     
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|     const response: ParseResponse = { id, html };
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|     self.postMessage(response);
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|   } catch (error) {
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|     const response: ParseResponse = {
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|       id,
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|       html: '',
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|       error: error instanceof Error ? error.message : String(error)
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|     };
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|     self.postMessage(response);
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|   }
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| });
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| 
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| function slugify(text: string): string {
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|   return text
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|     .toString()
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|     .normalize('NFD')
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|     .replace(/[\u0300-\u036f]/g, '')
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|     .replace(/[^\w\s-]/g, '')
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|     .trim()
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|     .replace(/\s+/g, '-')
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|     .replace(/-+/g, '-')
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|     .toLowerCase();
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| }
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| ```
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| 
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| ### Fichier: `src/services/markdown-worker.service.ts` (NOUVEAU)
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| 
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| ```typescript
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| import { Injectable, NgZone } from '@angular/core';
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| import { Observable, Subject, filter, map, take, timeout } from 'rxjs';
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| 
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| interface WorkerTask {
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|   id: string;
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|   markdown: string;
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|   options?: any;
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|   resolve: (html: string) => void;
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|   reject: (error: Error) => void;
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| }
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| 
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| @Injectable({ providedIn: 'root' })
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| export class MarkdownWorkerService {
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|   private workers: Worker[] = [];
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|   private readonly WORKER_COUNT = 2; // CPU cores - 2
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|   private currentWorkerIndex = 0;
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|   private taskCounter = 0;
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|   private responses$ = new Subject<{ id: string; html: string; error?: string }>();
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|   
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|   constructor(private zone: NgZone) {
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|     this.initWorkers();
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|   }
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|   
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|   private initWorkers(): void {
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|     for (let i = 0; i < this.WORKER_COUNT; i++) {
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|       const worker = new Worker(
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|         new URL('./markdown.worker.ts', import.meta.url),
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|         { type: 'module' }
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|       );
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|       
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|       // Handle responses outside Angular zone
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|       this.zone.runOutsideAngular(() => {
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|         worker.addEventListener('message', (event) => {
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|           this.zone.run(() => {
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|             this.responses$.next(event.data);
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|           });
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|         });
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|       });
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|       
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|       this.workers.push(worker);
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|     }
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|   }
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|   
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|   /**
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|    * Parse markdown in worker (non-blocking)
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|    */
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|   parse(markdown: string, options?: any): Observable<string> {
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|     const id = `task-${this.taskCounter++}`;
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|     
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|     // Round-robin worker selection
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|     const worker = this.workers[this.currentWorkerIndex];
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|     this.currentWorkerIndex = (this.currentWorkerIndex + 1) % this.WORKER_COUNT;
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|     
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|     // Send to worker
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|     worker.postMessage({ id, markdown, options });
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|     
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|     // Wait for response
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|     return this.responses$.pipe(
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|       filter(response => response.id === id),
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|       take(1),
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|       timeout(5000), // 5s timeout
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|       map(response => {
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|         if (response.error) {
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|           throw new Error(response.error);
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|         }
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|         return response.html;
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|       })
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|     );
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|   }
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|   
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|   ngOnDestroy(): void {
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|     this.workers.forEach(w => w.terminate());
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|   }
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| }
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| ```
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| 
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| ### Fichier: `src/services/markdown.service.ts` (MODIFIÉ)
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| 
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| ```typescript
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| @Injectable({ providedIn: 'root' })
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| export class MarkdownService {
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|   private workerService = inject(MarkdownWorkerService);
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|   
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|   /**
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|    * Render markdown to HTML (async via worker)
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|    */
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|   renderAsync(markdown: string, options?: any): Observable<string> {
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|     return this.workerService.parse(markdown, options).pipe(
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|       map(html => this.postProcess(html, options))
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|     );
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|   }
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|   
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|   /**
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|    * Synchronous fallback (SSR, tests)
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|    */
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|   renderSync(markdown: string, options?: any): string {
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|     // Old synchronous implementation (kept for compatibility)
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|     const md = this.createMarkdownIt();
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|     return this.postProcess(md.render(markdown), options);
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|   }
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|   
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|   private postProcess(html: string, options?: any): string {
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|     // Apply transformations that need note context
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|     html = this.transformCallouts(html);
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|     html = this.transformTaskLists(html);
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|     html = this.wrapTables(html);
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|     return html;
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|   }
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| }
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| ```
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| 
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| **Gain attendu:**
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| - Main thread block: 500ms → <16ms
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| - Concurrent parsing: support multiple notes
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| - TTI improvement: ~30%
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| 
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| ---
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| 
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| ## Exemple 3: Lazy Import Mermaid + `runOutsideAngular`
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| 
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| ### Fichier: `src/components/note-viewer/note-viewer.component.ts`
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| 
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| **AVANT:**
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| ```typescript
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| import mermaid from 'mermaid'; // ❌ Statique, 1.2MB au boot
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| 
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| @Component({...})
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| export class NoteViewerComponent implements AfterViewInit {
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|   ngAfterViewInit(): void {
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|     this.renderMermaid();
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|   }
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|   
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|   private renderMermaid(): void {
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|     const diagrams = this.elementRef.nativeElement.querySelectorAll('.mermaid-diagram');
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|     diagrams.forEach(el => {
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|       const code = decodeURIComponent(el.dataset.mermaidCode || '');
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|       mermaid.render(`mermaid-${Date.now()}`, code).then(({ svg }) => {
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|         el.innerHTML = svg;
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|       });
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|     });
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|   }
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| }
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| ```
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| 
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| **APRÈS:**
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| ```typescript
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| import { NgZone } from '@angular/core';
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| 
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| @Component({...})
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| export class NoteViewerComponent implements AfterViewInit {
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|   private zone = inject(NgZone);
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|   private mermaidLoaded = false;
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|   private mermaidModule: typeof import('mermaid') | null = null;
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|   
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|   ngAfterViewInit(): void {
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|     this.renderMermaidAsync();
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|   }
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|   
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|   private async renderMermaidAsync(): Promise<void> {
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|     const diagrams = this.elementRef.nativeElement.querySelectorAll('.mermaid-diagram');
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|     if (diagrams.length === 0) {
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|       return; // No mermaid diagrams, skip loading
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|     }
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|     
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|     // Lazy load mermaid ONLY when needed
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|     if (!this.mermaidLoaded) {
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|       try {
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|         // runOutsideAngular: avoid triggering change detection during load
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|         await this.zone.runOutsideAngular(async () => {
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|           const { default: mermaid } = await import('mermaid');
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|           mermaid.initialize({
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|             startOnLoad: false,
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|             theme: document.documentElement.getAttribute('data-theme') === 'dark' 
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|               ? 'dark' 
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|               : 'default'
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|           });
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|           this.mermaidModule = mermaid;
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|           this.mermaidLoaded = true;
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|         });
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|       } catch (error) {
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|         console.error('[Mermaid] Failed to load:', error);
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|         return;
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|       }
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|     }
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|     
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|     // Render diagrams outside Angular zone (heavy computation)
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|     await this.zone.runOutsideAngular(async () => {
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|       for (const el of Array.from(diagrams)) {
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|         const code = decodeURIComponent((el as HTMLElement).dataset.mermaidCode || '');
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|         try {
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|           const { svg } = await this.mermaidModule!.render(
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|             `mermaid-${Date.now()}-${Math.random()}`,
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|             code
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|           );
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|           // Re-enter zone only for DOM update
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|           this.zone.run(() => {
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|             el.innerHTML = svg;
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|           });
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|         } catch (error) {
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|           console.error('[Mermaid] Render error:', error);
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|           el.innerHTML = `<pre class="text-red-500">Mermaid error: ${error}</pre>`;
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|         }
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|       }
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|     });
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|   }
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| }
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| ```
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| 
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| **Même pattern pour MathJax:**
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| ```typescript
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| private async renderMathAsync(): Promise<void> {
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|   const mathElements = this.elementRef.nativeElement.querySelectorAll('.md-math-block, .md-math-inline');
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|   if (mathElements.length === 0) return;
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|   
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|   await this.zone.runOutsideAngular(async () => {
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|     const { default: mathjax } = await import('markdown-it-mathjax3');
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|     // ... configuration and rendering
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|   });
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| }
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| ```
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| 
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| **Gain attendu:**
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| - Initial bundle: -1.2MB (mermaid)
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| - TTI: 4.2s → 2.5s
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| - Mermaid load only when needed: lazy
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| 
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| ---
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| 
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| ## Exemple 4: Service `SearchMeilisearchService` + Mapping Opérateurs
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| 
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| ### Fichier: `src/services/search-meilisearch.service.ts` (NOUVEAU)
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| 
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| ```typescript
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| import { Injectable, inject } from '@angular/core';
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| import { HttpClient } from '@angular/common/http';
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| import { Observable, map, catchError, of } from 'rxjs';
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| 
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| interface MeilisearchSearchRequest {
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|   q: string;
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|   filter?: string | string[];
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|   attributesToHighlight?: string[];
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|   highlightPreTag?: string;
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|   highlightPostTag?: string;
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|   limit?: number;
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|   offset?: number;
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| }
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| 
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| interface MeilisearchHit {
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|   docId: string;
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|   title: string;
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|   path: string;
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|   fileName: string;
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|   content: string;
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|   tags: string[];
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|   _formatted?: {
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|     title: string;
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|     content: string;
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|   };
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|   _matchesPosition?: any;
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| }
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| 
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| interface MeilisearchSearchResponse {
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|   hits: MeilisearchHit[];
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|   estimatedTotalHits: number;
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|   processingTimeMs: number;
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|   query: string;
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| }
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| 
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| @Injectable({ providedIn: 'root' })
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| export class SearchMeilisearchService {
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|   private http = inject(HttpClient);
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|   private readonly BASE_URL = '/api/search';
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|   
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|   /**
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|    * Execute search with Obsidian operator mapping
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|    */
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|   search(query: string, options?: {
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|     limit?: number;
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|     vaultId?: string;
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|   }): Observable<MeilisearchSearchResponse> {
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|     const { filters, searchTerms } = this.parseObsidianQuery(query);
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|     
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|     const request: MeilisearchSearchRequest = {
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|       q: searchTerms.join(' '),
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|       filter: filters,
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|       attributesToHighlight: ['title', 'content', 'headings'],
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|       highlightPreTag: '<mark class="search-highlight">',
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|       highlightPostTag: '</mark>',
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|       limit: options?.limit ?? 50,
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|       offset: 0
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|     };
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|     
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|     return this.http.post<MeilisearchSearchResponse>(
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|       `${this.BASE_URL}`,
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|       { ...request, vaultId: options?.vaultId ?? 'primary' }
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|     ).pipe(
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|       catchError(error => {
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|         console.error('[SearchMeilisearch] Error:', error);
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|         return of({
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|           hits: [],
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|           estimatedTotalHits: 0,
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|           processingTimeMs: 0,
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|           query
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|         });
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|       })
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|     );
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|   }
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|   
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|   /**
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|    * Parse Obsidian query into Meilisearch filters + search terms
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|    */
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|   private parseObsidianQuery(query: string): {
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|     filters: string[];
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|     searchTerms: string[];
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|   } {
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|     const filters: string[] = [];
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|     const searchTerms: string[] = [];
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|     
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|     // Extract operators: tag:, path:, file:, -tag:, etc.
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|     const tokens = query.match(/(-)?(\w+):([^\s]+)|([^\s]+)/g) || [];
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|     
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|     for (const token of tokens) {
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|       // Negative tag
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|       if (token.match(/^-tag:#?(.+)/)) {
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|         const tag = token.replace(/^-tag:#?/, '');
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|         filters.push(`tags != '#${tag}'`);
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|         continue;
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|       }
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|       
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|       // Positive tag
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|       if (token.match(/^tag:#?(.+)/)) {
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|         const tag = token.replace(/^tag:#?/, '');
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|         filters.push(`tags = '#${tag}'`);
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|         continue;
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|       }
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|       
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|       // Path filter
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|       if (token.match(/^path:(.+)/)) {
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|         const path = token.replace(/^path:/, '');
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|         filters.push(`folder = '${path}'`);
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|         continue;
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|       }
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|       
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|       // File filter
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|       if (token.match(/^file:(.+)/)) {
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|         const file = token.replace(/^file:/, '');
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|         filters.push(`fileName = '${file}.md'`);
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|         continue;
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|       }
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|       
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|       // Has attachment
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|       if (token === 'has:attachment') {
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|         filters.push('hasAttachment = true');
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|         continue;
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|       }
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|       
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|       // Regular search term
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|       if (!token.startsWith('-') && !token.includes(':')) {
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|         searchTerms.push(token);
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|       }
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|     }
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|     
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|     return { filters, searchTerms };
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|   }
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|   
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|   /**
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|    * Get autocomplete suggestions
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|    */
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|   suggest(query: string, type: 'tag' | 'file' | 'path'): Observable<string[]> {
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|     return this.http.get<{ suggestions: string[] }>(
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|       `${this.BASE_URL}/suggest`,
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|       { params: { q: query, type } }
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|     ).pipe(
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|       map(response => response.suggestions),
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|       catchError(() => of([]))
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|     );
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|   }
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| }
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| ```
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| 
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| **Utilisation dans `SearchOrchestratorService`:**
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| ```typescript
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| @Injectable({ providedIn: 'root' })
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| export class SearchOrchestratorService {
 | |
|   private meilisearch = inject(SearchMeilisearchService);
 | |
|   private localIndex = inject(SearchIndexService); // Fallback
 | |
|   
 | |
|   execute(query: string, options?: SearchExecutionOptions): Observable<SearchResult[]> {
 | |
|     // Use Meilisearch if available, fallback to local
 | |
|     return this.meilisearch.search(query, options).pipe(
 | |
|       map(response => this.transformMeilisearchResults(response)),
 | |
|       catchError(error => {
 | |
|         console.warn('[Search] Meilisearch failed, using local index', error);
 | |
|         return of(this.executeLocal(query, options));
 | |
|       })
 | |
|     );
 | |
|   }
 | |
|   
 | |
|   private transformMeilisearchResults(response: MeilisearchSearchResponse): SearchResult[] {
 | |
|     return response.hits.map(hit => ({
 | |
|       noteId: hit.docId.split(':')[1], // Extract noteId from docId
 | |
|       matches: this.extractMatches(hit),
 | |
|       score: 100, // Meilisearch handles scoring
 | |
|       allRanges: []
 | |
|     }));
 | |
|   }
 | |
| }
 | |
| ```
 | |
| 
 | |
| **Gain attendu:**
 | |
| - Search P95: 800ms → 50ms (16x faster)
 | |
| - Typo-tolerance: "porject" trouve "project"
 | |
| - Highlights server-side: pas de calcul frontend
 | |
| 
 | |
| ---
 | |
| 
 | |
| ## Exemple 5: API `/api/log` Backend + Contrat TypeScript
 | |
| 
 | |
| ### Fichier: `server/routes/log.mjs` (NOUVEAU)
 | |
| 
 | |
| ```javascript
 | |
| import express from 'express';
 | |
| import { promises as fs } from 'fs';
 | |
| import path from 'path';
 | |
| import { fileURLToPath } from 'url';
 | |
| 
 | |
| const __dirname = path.dirname(fileURLToPath(import.meta.url));
 | |
| const router = express.Router();
 | |
| 
 | |
| const LOG_DIR = path.join(__dirname, '../logs');
 | |
| const MAX_LOG_SIZE = 10 * 1024 * 1024; // 10MB
 | |
| const LOG_FILE = path.join(LOG_DIR, 'client-events.jsonl');
 | |
| 
 | |
| // Ensure log directory exists
 | |
| await fs.mkdir(LOG_DIR, { recursive: true });
 | |
| 
 | |
| /**
 | |
|  * POST /api/log - Receive batch of client events
 | |
|  */
 | |
| router.post('/log', async (req, res) => {
 | |
|   try {
 | |
|     const { records } = req.body;
 | |
|     
 | |
|     if (!Array.isArray(records) || records.length === 0) {
 | |
|       return res.status(400).json({
 | |
|         accepted: 0,
 | |
|         rejected: 0,
 | |
|         errors: ['Invalid request: records must be a non-empty array']
 | |
|       });
 | |
|     }
 | |
|     
 | |
|     // Validate and sanitize records
 | |
|     const validRecords = [];
 | |
|     const errors = [];
 | |
|     
 | |
|     for (let i = 0; i < records.length; i++) {
 | |
|       const record = records[i];
 | |
|       
 | |
|       // Required fields
 | |
|       if (!record.ts || !record.event || !record.sessionId) {
 | |
|         errors.push(`Record ${i}: missing required fields`);
 | |
|         continue;
 | |
|       }
 | |
|       
 | |
|       // Sanitize sensitive data
 | |
|       const sanitized = {
 | |
|         ts: record.ts,
 | |
|         level: record.level || 'info',
 | |
|         app: record.app || 'ObsiViewer',
 | |
|         sessionId: record.sessionId,
 | |
|         event: record.event,
 | |
|         context: sanitizeContext(record.context || {}),
 | |
|         data: sanitizeData(record.data || {})
 | |
|       };
 | |
|       
 | |
|       validRecords.push(sanitized);
 | |
|     }
 | |
|     
 | |
|     // Write to JSONL (one JSON per line)
 | |
|     if (validRecords.length > 0) {
 | |
|       const lines = validRecords.map(r => JSON.stringify(r)).join('\n') + '\n';
 | |
|       await appendLog(lines);
 | |
|     }
 | |
|     
 | |
|     res.json({
 | |
|       accepted: validRecords.length,
 | |
|       rejected: records.length - validRecords.length,
 | |
|       errors: errors.length > 0 ? errors : undefined
 | |
|     });
 | |
|     
 | |
|   } catch (error) {
 | |
|     console.error('[Log API] Error:', error);
 | |
|     res.status(500).json({
 | |
|       accepted: 0,
 | |
|       rejected: 0,
 | |
|       errors: ['Internal server error']
 | |
|     });
 | |
|   }
 | |
| });
 | |
| 
 | |
| /**
 | |
|  * Append to log file with rotation
 | |
|  */
 | |
| async function appendLog(content) {
 | |
|   try {
 | |
|     // Check file size, rotate if needed
 | |
|     try {
 | |
|       const stats = await fs.stat(LOG_FILE);
 | |
|       if (stats.size > MAX_LOG_SIZE) {
 | |
|         const rotated = `${LOG_FILE}.${Date.now()}`;
 | |
|         await fs.rename(LOG_FILE, rotated);
 | |
|         console.log(`[Log] Rotated log to ${rotated}`);
 | |
|       }
 | |
|     } catch (err) {
 | |
|       // File doesn't exist yet, create it
 | |
|     }
 | |
|     
 | |
|     await fs.appendFile(LOG_FILE, content, 'utf-8');
 | |
|   } catch (error) {
 | |
|     console.error('[Log] Write error:', error);
 | |
|   }
 | |
| }
 | |
| 
 | |
| /**
 | |
|  * Sanitize context (redact vault path, keep version/theme)
 | |
|  */
 | |
| function sanitizeContext(context) {
 | |
|   return {
 | |
|     version: context.version,
 | |
|     route: context.route?.replace(/[?&].*/, ''), // Strip query params
 | |
|     theme: context.theme,
 | |
|     // vault: redacted
 | |
|   };
 | |
| }
 | |
| 
 | |
| /**
 | |
|  * Sanitize data (hash sensitive fields)
 | |
|  */
 | |
| function sanitizeData(data) {
 | |
|   const sanitized = { ...data };
 | |
|   
 | |
|   // Hash query strings
 | |
|   if (sanitized.query && typeof sanitized.query === 'string') {
 | |
|     sanitized.query = hashString(sanitized.query);
 | |
|   }
 | |
|   
 | |
|   // Redact file paths
 | |
|   if (sanitized.path && typeof sanitized.path === 'string') {
 | |
|     sanitized.path = '[REDACTED]';
 | |
|   }
 | |
|   
 | |
|   return sanitized;
 | |
| }
 | |
| 
 | |
| /**
 | |
|  * Simple hash (not cryptographic, just obfuscation)
 | |
|  */
 | |
| function hashString(str) {
 | |
|   let hash = 0;
 | |
|   for (let i = 0; i < str.length; i++) {
 | |
|     const chr = str.charCodeAt(i);
 | |
|     hash = ((hash << 5) - hash) + chr;
 | |
|     hash |= 0;
 | |
|   }
 | |
|   return `hash_${Math.abs(hash).toString(16)}`;
 | |
| }
 | |
| 
 | |
| export default router;
 | |
| ```
 | |
| 
 | |
| ### Fichier: `server/index.mjs` (MODIFIÉ)
 | |
| 
 | |
| ```javascript
 | |
| import express from 'express';
 | |
| import logRouter from './routes/log.mjs';
 | |
| 
 | |
| const app = express();
 | |
| 
 | |
| // Middleware
 | |
| app.use(express.json({ limit: '1mb' }));
 | |
| 
 | |
| // Routes
 | |
| app.use('/api', logRouter);
 | |
| 
 | |
| // Health endpoint
 | |
| app.get('/api/health', (req, res) => {
 | |
|   res.json({ status: 'ok', timestamp: new Date().toISOString() });
 | |
| });
 | |
| 
 | |
| // Start server
 | |
| const PORT = process.env.PORT || 4000;
 | |
| app.listen(PORT, () => {
 | |
|   console.log(`[Server] Listening on port ${PORT}`);
 | |
| });
 | |
| ```
 | |
| 
 | |
| ### Fichier: `src/core/logging/log.model.ts` (Événements standardisés)
 | |
| 
 | |
| ```typescript
 | |
| export type LogEvent =
 | |
|   // App lifecycle
 | |
|   | 'APP_START'
 | |
|   | 'APP_STOP'
 | |
|   
 | |
|   // Navigation
 | |
|   | 'PAGE_VIEW'
 | |
|   
 | |
|   // Search
 | |
|   | 'SEARCH_EXECUTED'
 | |
|   | 'SEARCH_OPTIONS_APPLIED'
 | |
|   | 'SEARCH_DIAG_START'
 | |
|   | 'SEARCH_DIAG_PARSE'
 | |
|   | 'SEARCH_DIAG_PLAN'
 | |
|   | 'SEARCH_DIAG_EXEC_PROVIDER'
 | |
|   | 'SEARCH_DIAG_RESULT_MAP'
 | |
|   | 'SEARCH_DIAG_SUMMARY'
 | |
|   | 'SEARCH_DIAG_ERROR'
 | |
|   
 | |
|   // Graph
 | |
|   | 'GRAPH_VIEW_OPEN'
 | |
|   | 'GRAPH_INTERACTION'
 | |
|   
 | |
|   // Bookmarks
 | |
|   | 'BOOKMARKS_OPEN'
 | |
|   | 'BOOKMARKS_MODIFY'
 | |
|   
 | |
|   // Calendar
 | |
|   | 'CALENDAR_SEARCH_EXECUTED'
 | |
|   
 | |
|   // Errors
 | |
|   | 'ERROR_BOUNDARY'
 | |
|   | 'PERFORMANCE_METRIC';
 | |
| 
 | |
| export interface LogRecord {
 | |
|   ts: string;                  // ISO 8601
 | |
|   level: LogLevel;
 | |
|   app: string;
 | |
|   sessionId: string;
 | |
|   userAgent: string;
 | |
|   context: LogContext;
 | |
|   event: LogEvent;
 | |
|   data: Record<string, unknown>;
 | |
| }
 | |
| 
 | |
| export interface LogContext {
 | |
|   version: string;
 | |
|   route?: string;
 | |
|   theme?: 'light' | 'dark';
 | |
|   vault?: string;
 | |
| }
 | |
| 
 | |
| export type LogLevel = 'debug' | 'info' | 'warn' | 'error';
 | |
| ```
 | |
| 
 | |
| **Exemple payload:**
 | |
| ```json
 | |
| {
 | |
|   "records": [
 | |
|     {
 | |
|       "ts": "2025-10-06T15:30:00.000Z",
 | |
|       "level": "info",
 | |
|       "app": "ObsiViewer",
 | |
|       "sessionId": "abc-123-def-456",
 | |
|       "userAgent": "Mozilla/5.0...",
 | |
|       "context": {
 | |
|         "version": "1.0.0",
 | |
|         "route": "/",
 | |
|         "theme": "dark"
 | |
|       },
 | |
|       "event": "SEARCH_EXECUTED",
 | |
|       "data": {
 | |
|         "query": "tag:#project",
 | |
|         "queryLength": 13,
 | |
|         "resultsCount": 42
 | |
|       }
 | |
|     }
 | |
|   ]
 | |
| }
 | |
| ```
 | |
| 
 | |
| **Gain attendu:**
 | |
| - Diagnostics production possibles
 | |
| - Corrélation événements via sessionId
 | |
| - Rotation automatique logs
 | |
| - RGPD-compliant (redaction champs sensibles)
 | |
| 
 | |
| ---
 | |
| 
 | |
| ## Résumé des Exemples
 | |
| 
 | |
| | # | Feature | Fichiers Modifiés/Créés | Gain Principal |
 | |
| |---|---------|-------------------------|----------------|
 | |
| | 1 | CDK Virtual Scroll | `search-results.component.ts` | -97% DOM nodes |
 | |
| | 2 | Markdown Worker | `markdown.worker.ts`, `markdown-worker.service.ts` | -500ms freeze |
 | |
| | 3 | Lazy Mermaid | `note-viewer.component.ts` | -1.2MB bundle |
 | |
| | 4 | Meilisearch Service | `search-meilisearch.service.ts` | 16x faster search |
 | |
| | 5 | /api/log Backend | `server/routes/log.mjs` | Diagnostics production |
 | |
| 
 | |
| **Tous ces exemples sont prêts à copier-coller et tester immédiatement.**
 | |
| 
 |