- Backend NestJS : CRUD api_entries + categories, upload YAML multi-fichiers, génération docs AsyncAPI (@asyncapi/cli@6.0.0) et OpenAPI (redocly) - Fix: route wildcard GET /api/apis/:id/*path pour servir les assets statiques (CSS/JS) générés par AsyncAPI HTML template (contournement bug path-to-regexp v8) - Frontend Angular 19 : pages catalog, browse, api-detail, doc-viewer, upload (DSFR) - Seeder de données de démo (idempotent) - Docker Compose dev + Dockerfiles + manifests K8s - Documentation : README, architecture, référence API REST Generated with [Claude Code](https://claude.ai/code) via [Happy](https://happy.engineering) Co-Authored-By: Claude <noreply@anthropic.com> Co-Authored-By: Happy <yesreply@happy.engineering>
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Datacat — Guide d'implémentation complet
1. Purpose & Architecture
Datacat est un catalogue de données d'API. Il permet d'importer des fichiers YAML (AsyncAPI ou OpenAPI) et de les transformer en documentation HTML via des CLI spécialisées.
datacat/
├── back/ # API NestJS + TypeORM + PostgreSQL
├── front-public/ # Frontend Angular 19 (DSFR)
├── shared/ # Types TypeScript partagés
├── infra/ # Docker, Dockerfiles, K8s
└── documentation/ # Ce fichier + README
Flux principal
User uploads YAML → POST /api/uploads
→ ApiEntry created (status: PENDING)
→ DocsGenerationService.generate()
→ asyncapi generate fromFile input.yaml --output /docs-output/<id>/
→ OR redocly build-docs input.yaml --output /docs-output/<id>/index.html
→ ApiEntry updated (status: GENERATED, htmlPath: /docs-output/<id>/index.html)
→ GET /api/apis/:id/docs → sendFile(htmlPath)
2. Commandes dev
# Tout en Docker (recommandé)
pnpm run dev # docker compose up
pnpm run dev:build # docker compose up --build
# Local (sans Docker)
cd back && pnpm run start:dev # NestJS watch mode — port 3000
cd front-public && pnpm run start # Angular dev server — port 4200
# Install deps
cd back && pnpm install
cd front-public && pnpm install
cd shared && pnpm install
# Build prod
cd back && pnpm run build
cd front-public && pnpm run build:prod
Proxy Angular → API
Créer front-public/proxy.conf.json :
{
"/api": {
"target": "http://localhost:3000",
"secure": false
}
}
3. Stack & Versions
| Outil | Version |
|---|---|
| Node.js | 22 LTS |
| pnpm | 10.33.0 |
| NestJS | ^11.0.0 |
| TypeORM | ^0.3.20 |
| PostgreSQL | 17 |
| Angular | ^19.0.0 |
| TypeScript | ^5.7.0 |
| @asyncapi/cli | latest (in Docker) |
| @redocly/cli | latest (in Docker) |
Conventions TypeScript
- Pas de
any— utiliser les types de@datacat/shared strict: truepartout- English pour le code, Français pour les commentaires
4. Schéma DB
Table api_entries
CREATE TABLE api_entries (
id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
title VARCHAR(255) NOT NULL,
version VARCHAR(50) NOT NULL,
description TEXT,
type VARCHAR(10) NOT NULL CHECK (type IN ('ASYNCAPI', 'OPENAPI')),
yaml_content TEXT NOT NULL,
html_path VARCHAR(500),
status VARCHAR(10) NOT NULL DEFAULT 'PENDING'
CHECK (status IN ('PENDING', 'GENERATED', 'ERROR')),
error_message TEXT,
created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);
Entity TypeORM (back/src/modules/apis/api-entry.entity.ts)
import { Entity, PrimaryGeneratedColumn, Column, CreateDateColumn, UpdateDateColumn } from 'typeorm';
import { ApiType, ApiStatus } from '@datacat/shared';
@Entity('api_entries')
export class ApiEntryEntity {
@PrimaryGeneratedColumn('uuid')
id: string;
@Column()
title: string;
@Column()
version: string;
@Column({ nullable: true, type: 'text' })
description: string | null;
@Column({ type: 'varchar', length: 10 })
type: ApiType;
@Column({ type: 'text', name: 'yaml_content' })
yamlContent: string;
@Column({ nullable: true, name: 'html_path' })
htmlPath: string | null;
@Column({ type: 'varchar', length: 10, default: 'PENDING' })
status: ApiStatus;
@Column({ nullable: true, type: 'text', name: 'error_message' })
errorMessage: string | null;
@CreateDateColumn({ name: 'created_at' })
createdAt: Date;
@UpdateDateColumn({ name: 'updated_at' })
updatedAt: Date;
}
5. Architecture NestJS
Structure back/src/
src/
├── main.ts
├── app.module.ts
├── modules/
│ ├── apis/
│ │ ├── apis.module.ts
│ │ ├── apis.controller.ts # REST endpoints
│ │ ├── apis.service.ts # CRUD logique
│ │ └── api-entry.entity.ts # TypeORM entity
│ ├── uploads/
│ │ ├── uploads.module.ts
│ │ └── uploads.controller.ts # POST /api/uploads (multipart)
│ └── docs-generation/
│ ├── docs-generation.module.ts
│ └── docs-generation.service.ts # Appels AsyncAPI/Redocly CLI
├── database/
│ └── database.module.ts # TypeORM config (si séparé)
└── common/
├── filters/
│ └── all-exceptions.filter.ts
└── interceptors/
└── transform.interceptor.ts
API REST
GET /health → { status: 'ok' }
GET /api/apis → ApiListResponse (+ ?search=&type=&page=&limit=)
GET /api/apis/:id → ApiEntry
POST /api/uploads → ApiEntry (multipart: file + title + version + description + type)
PATCH /api/apis/:id → ApiEntry (body: UpdateApiEntryDto)
DELETE /api/apis/:id → 204 No Content
POST /api/apis/:id/regenerate → ApiEntry (relance la génération de docs)
GET /api/apis/:id/docs → sendFile(htmlPath) ou 404 si pas encore généré
GET /api/apis/:id/yaml → download du YAML brut (Content-Disposition: attachment)
ApisController
import { Controller, Get, Patch, Delete, Post, Param, Body, Query, Res, NotFoundException } from '@nestjs/common';
import { Response } from 'express';
@Controller('apis')
export class ApisController {
constructor(private readonly apisService: ApisService) {}
@Get()
findAll(@Query() query: ApiListQuery) {
return this.apisService.findAll(query);
}
@Get(':id')
findOne(@Param('id') id: string) {
return this.apisService.findOneOrThrow(id);
}
@Patch(':id')
update(@Param('id') id: string, @Body() dto: UpdateApiEntryDto) {
return this.apisService.update(id, dto);
}
@Delete(':id')
@HttpCode(204)
remove(@Param('id') id: string) {
return this.apisService.remove(id);
}
@Post(':id/regenerate')
regenerate(@Param('id') id: string) {
return this.apisService.regenerate(id);
}
@Get(':id/docs')
async getDocs(@Param('id') id: string, @Res() res: Response) {
const entry = await this.apisService.findOneOrThrow(id);
if (!entry.htmlPath) throw new NotFoundException('Documentation not generated yet');
res.sendFile(entry.htmlPath);
}
@Get(':id/yaml')
async getYaml(@Param('id') id: string, @Res() res: Response) {
const entry = await this.apisService.findOneOrThrow(id);
res.setHeader('Content-Disposition', `attachment; filename="${entry.title}.yaml"`);
res.setHeader('Content-Type', 'application/x-yaml');
res.send(entry.yamlContent);
}
}
UploadsController
import { Controller, Post, UseInterceptors, UploadedFile, Body } from '@nestjs/common';
import { FileInterceptor } from '@nestjs/platform-express';
import { diskStorage } from 'multer';
@Controller('uploads')
export class UploadsController {
constructor(
private readonly apisService: ApisService,
private readonly docsService: DocsGenerationService,
) {}
@Post()
@UseInterceptors(FileInterceptor('file', {
storage: diskStorage({ destination: '/tmp/uploads' }),
fileFilter: (req, file, cb) => {
if (!file.originalname.match(/\.(yaml|yml)$/)) {
return cb(new Error('Only YAML files are allowed'), false);
}
cb(null, true);
},
}))
async upload(
@UploadedFile() file: Express.Multer.File,
@Body() body: { title: string; version: string; description?: string; type: 'ASYNCAPI' | 'OPENAPI' },
) {
const yamlContent = fs.readFileSync(file.path, 'utf-8');
const entry = await this.apisService.create({ ...body, yamlContent });
// Fire and forget — génération asynchrone
this.docsService.generate(entry.id).catch(console.error);
return entry;
}
}
DocsGenerationService
import { Injectable } from '@nestjs/common';
import { execFile } from 'child_process';
import { promisify } from 'util';
import * as fs from 'fs/promises';
import * as path from 'path';
const execFileAsync = promisify(execFile);
@Injectable()
export class DocsGenerationService {
private readonly outputDir = process.env.DOCS_OUTPUT_DIR ?? '/app/docs-output';
async generate(entryId: string): Promise<void> {
const entry = await this.apisService.findOneOrThrow(entryId);
const entryDir = path.join(this.outputDir, entryId);
await fs.mkdir(entryDir, { recursive: true });
const yamlPath = path.join(entryDir, 'input.yaml');
await fs.writeFile(yamlPath, entry.yamlContent, 'utf-8');
try {
if (entry.type === 'ASYNCAPI') {
await this.generateAsyncApi(yamlPath, entryDir);
} else {
await this.generateOpenApi(yamlPath, entryDir);
}
const htmlPath = path.join(entryDir, 'index.html');
await this.apisService.update(entryId, { htmlPath, status: 'GENERATED' });
} catch (error) {
await this.apisService.update(entryId, {
status: 'ERROR',
errorMessage: String(error),
});
}
}
private async generateAsyncApi(yamlPath: string, outputDir: string): Promise<void> {
// asyncapi generate fromFile <input> --output <dir>
await execFileAsync('asyncapi', [
'generate', 'fromFile',
yamlPath,
'--output', outputDir,
]);
}
private async generateOpenApi(yamlPath: string, outputDir: string): Promise<void> {
// redocly build-docs <input> --output <file>
await execFileAsync('redocly', [
'build-docs',
yamlPath,
'--output', path.join(outputDir, 'index.html'),
]);
}
}
6. Conventions Angular 19
Règles absolues
- Standalone components : toujours
standalone: true, jamais de NgModule - Signals : utiliser
signal(),computed(),effect()pour le state local - inject() : utiliser
inject()à la place de constructor injection - OnPush : toujours
changeDetection: ChangeDetectionStrategy.OnPush - Lazy loading : toutes les pages sont lazy-loadées via
loadComponent
Pattern type pour un composant de page
import { Component, signal, computed, inject, OnInit, ChangeDetectionStrategy } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { ActivatedRoute } from '@angular/router';
import { CommonModule } from '@angular/common';
@Component({
selector: 'app-catalog',
standalone: true,
imports: [CommonModule],
changeDetection: ChangeDetectionStrategy.OnPush,
template: `
<div class="fr-container fr-mt-4w">
<h1 class="fr-h1">Catalogue des APIs</h1>
@if (loading()) {
<div class="fr-callout">Chargement...</div>
}
@for (api of apis(); track api.id) {
<div class="fr-card fr-mb-2w">
<h2>{{ api.title }}</h2>
</div>
}
</div>
`,
})
export class CatalogComponent implements OnInit {
private http = inject(HttpClient);
apis = signal<ApiEntryListItem[]>([]);
loading = signal(false);
ngOnInit() {
this.loadApis();
}
private loadApis() {
this.loading.set(true);
this.http.get<ApiListResponse>('/api/apis').subscribe({
next: (res) => {
this.apis.set(res.items);
this.loading.set(false);
},
error: () => this.loading.set(false),
});
}
}
Service type
import { Injectable, inject } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { Observable } from 'rxjs';
import { ApiEntry, ApiListResponse, ApiListQuery } from '@datacat/shared';
@Injectable({ providedIn: 'root' })
export class ApiService {
private http = inject(HttpClient);
private baseUrl = '/api/apis';
list(query?: ApiListQuery): Observable<ApiListResponse> {
return this.http.get<ApiListResponse>(this.baseUrl, { params: query as Record<string, string> });
}
get(id: string): Observable<ApiEntry> {
return this.http.get<ApiEntry>(`${this.baseUrl}/${id}`);
}
delete(id: string): Observable<void> {
return this.http.delete<void>(`${this.baseUrl}/${id}`);
}
regenerate(id: string): Observable<ApiEntry> {
return this.http.post<ApiEntry>(`${this.baseUrl}/${id}/regenerate`, {});
}
}
7. DSFR (Système de Design de l'État)
Installation (assets statiques — pas de package npm)
Télécharger la dernière version depuis https://www.systeme-de-design.gouv.fr/
et placer les assets dans front-public/src/assets/dsfr/.
Structure attendue :
src/assets/dsfr/
├── dsfr.min.css
├── dsfr.module.min.js
├── dsfr.nomodule.min.js
└── utility/
└── icons/
└── icons.min.css
Déjà référencé dans index.html.
Classes CSS essentielles
<!-- Layout -->
<div class="fr-container"> <!-- Conteneur centré -->
<div class="fr-grid-row fr-grid-row--gutters"> <!-- Grille -->
<div class="fr-col-12 fr-col-md-6"> <!-- Colonnes -->
<!-- Typographie -->
<h1 class="fr-h1"> <!-- Titre niveau 1 -->
<p class="fr-text--lead"> <!-- Texte mise en avant -->
<!-- Composants -->
<div class="fr-card"> <!-- Carte -->
<div class="fr-card__body">
<div class="fr-card__content">
<h3 class="fr-card__title">
<div class="fr-badge fr-badge--info"> <!-- Badge status -->
<div class="fr-badge fr-badge--success">
<div class="fr-badge fr-badge--error">
<button class="fr-btn"> <!-- Bouton principal -->
<button class="fr-btn fr-btn--secondary"> <!-- Bouton secondaire -->
<button class="fr-btn fr-btn--icon-left fr-icon-upload-2-line"> <!-- Avec icône -->
<div class="fr-input-group"> <!-- Champ de formulaire -->
<label class="fr-label">
<input class="fr-input" />
<div class="fr-select-group"> <!-- Select -->
<select class="fr-select">
<nav class="fr-stepper"> <!-- Stepper 3 étapes -->
<span class="fr-stepper__steps" data-fr-current-step="1" data-fr-steps="3">
<!-- Espacement (t=top, b=bottom, l=left, r=right, h=horizontal, v=vertical) -->
<!-- Unités: 1w=8px, 2w=16px, 3w=24px, 4w=32px -->
fr-mt-4w fr-mb-2w fr-ml-1w fr-p-3w fr-mx-auto
Icônes DSFR disponibles
fr-icon-upload-2-line— uploadfr-icon-file-line— fichierfr-icon-search-line— recherchefr-icon-arrow-right-line— flèche droitefr-icon-external-link-line— lien externefr-icon-delete-bin-line— supprimerfr-icon-refresh-line— régénérerfr-icon-eye-line— voir
8. Commandes AsyncAPI CLI & Redocly CLI
AsyncAPI CLI
# Générer HTML depuis un fichier YAML AsyncAPI
asyncapi generate fromFile ./api.yaml --output ./output-dir/
# Valider un fichier
asyncapi validate ./api.yaml
# Format de sortie : ./output-dir/index.html
Redocly CLI
# Générer HTML depuis un fichier OpenAPI YAML
redocly build-docs ./api.yaml --output ./output-dir/index.html
# Valider un fichier OpenAPI
redocly lint ./api.yaml
# Format de sortie : ./output-dir/index.html
Notes importantes
- Les deux CLIs sont installés dans l'image Docker prod (
infra/Dockerfile.prod, targetback) - En dev, ils sont installés dans
infra/Dockerfile.back.dev - La génération est asynchrone : l'upload crée l'entrée, puis la génération se fait en background
- Le répertoire de sortie :
DOCS_OUTPUT_DIR=/app/docs-output(PVC en prod) - Chaque API a son propre sous-répertoire :
/app/docs-output/<uuid>/index.html
9. Déploiement K3s
Namespaces
datacat: tous les pods (backend, frontend, postgres)- Middlewares Traefik :
dev-basic-authetredirect-https(dans namespacedev)
URLs
- Frontend :
https://datacat.dev.chmod777.dev - API :
https://api.datacat.dev.chmod777.dev - Basic Auth : user
dev, password dans~/server-setup/.dev-password
Images
- Backend :
git.chmod777.dev/z3n/datacat/back:latest - Frontend :
git.chmod777.dev/z3n/datacat/front:latest
PVC
datacat-docs-pvc(5Gi) — monté sur/app/docs-outputdans le pod backenddatacat-postgres-pvc(10Gi) — données PostgreSQL
Secret K8s requis
# Créer le secret pour les credentials de la DB
kubectl create secret generic datacat-secrets \
--from-literal=db-user=datacat \
--from-literal=db-password=<PASSWORD> \
-n datacat
# Créer le secret pour le registry Gitea
kubectl create secret docker-registry registry-secret \
--docker-server=git.chmod777.dev \
--docker-username=z3n \
--docker-password=<TOKEN> \
-n datacat
Déploiement initial
cd infra/k8s
kubectl apply -k .
# ou
kubectl apply -f namespace.yaml
kubectl apply -f pvc.yaml
kubectl apply -f postgres.yaml
kubectl apply -f backend.yaml
kubectl apply -f frontend.yaml
kubectl apply -f ingressroutes.yaml
Mettre à jour les images
kubectl set image deployment/backend backend=git.chmod777.dev/z3n/datacat/back:<sha> -n datacat
kubectl set image deployment/frontend frontend=git.chmod777.dev/z3n/datacat/front:<sha> -n datacat
kubectl rollout status deployment/backend -n datacat
kubectl rollout status deployment/frontend -n datacat
10. CI/CD Woodpecker
Le pipeline .woodpecker.yaml à la racine gère :
- build-back : Kaniko →
git.chmod777.dev/z3n/datacat/back:latest - build-front : Kaniko →
git.chmod777.dev/z3n/datacat/front:latest - deploy :
kubectl set image+kubectl rollout status
Secrets Woodpecker à configurer
Dans https://ci.chmod777.dev → Settings → Secrets pour le dépôt datacat :
registry_user:z3nregistry_password: token Gitea avec accès packagesdeploy_kubeconfig: contenu du fichier~/.kube/config
Dépôt Gitea
Créer le dépôt datacat dans l'organisation z3n sur https://git.chmod777.dev.
cd /home/flo/dev/datacat
git init
git remote add origin https://git.chmod777.dev/z3n/datacat.git
git add .
git commit -m "feat: initial scaffold"
git push -u origin main
11. Règles de code
- Langue : code en anglais, commentaires en français
- Commits : Conventional Commits (
feat:,fix:,chore:,docs:,refactor:) - TypeScript : pas de
any,strict: true, types depuis@datacat/shared - NestJS : un module par feature (
ApisModule,UploadsModule,DocsGenerationModule) - Angular : standalone components, signals, inject(), OnPush, lazy loading
- Tests : Vitest pour le backend,
ng testpour le frontend - Pas de
console.logen production — utiliser Pino (NestJS) ou le logger Angular
12. Pages Angular — Détail d'implémentation
/catalog — CatalogComponent
- Grille DSFR de cartes (
fr-card) - Champ de recherche (
fr-input) filtrant titre + description - Select DSFR pour filtrer par type (ASYNCAPI / OPENAPI)
- Pagination DSFR (
fr-pagination) - Lien vers
/uploadavec boutonfr-btn fr-btn--icon-left fr-icon-upload-2-line
/catalog/:id — ApiDetailComponent
- Métadonnées : titre, version, description, type, statut (badge), dates
- Badge de statut :
fr-badge--success(GENERATED),fr-badge--warning(PENDING),fr-badge--error(ERROR) - Boutons :
- "Voir la documentation" →
/catalog/:id/docs(désactivé si status ≠ GENERATED) - "Télécharger YAML" →
/api/apis/:id/yaml - "Régénérer" → POST
/api/apis/:id/regenerate - "Supprimer" → DELETE
/api/apis/:id+ redirect/catalog
- "Voir la documentation" →
/catalog/:id/docs — DocViewerComponent
<iframe>plein écran affichant/api/apis/:id/docs- Bouton "Retour" en haut
/upload — UploadComponent
- Stepper DSFR 3 étapes : (1) Choisir le fichier, (2) Métadonnées, (3) Confirmation
- Étape 1 : Zone de drop DSFR (
fr-upload-group) pour fichier.yaml/.yml - Étape 2 : Formulaire (titre, version, description, type select AsyncAPI/OpenAPI)
- Étape 3 : Récap + bouton "Importer"
- POST multipart vers
/api/uploads - Redirect vers
/catalog/:idaprès succès