initial commit

.github/workflows/docker.yml

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+name: Build and Push Docker Image
+
+on:
+  push:
+    branches: [main, master]
+    tags: ['v*']
+  pull_request:
+    branches: [main, master]
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to Container Registry
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=sha
+
+      - name: Build and push
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

.gitignore

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+node_modules/
+dist/
+*.log
+.env
+.DS_Store

Dockerfile

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+FROM node:20-slim AS builder
+WORKDIR /app
+COPY package.json tsconfig.json ./
+RUN npm install
+COPY src/ ./src/
+RUN npm run build
+
+FROM node:20-slim
+WORKDIR /app
+COPY package.json ./
+RUN npm install --omit=dev
+COPY --from=builder /app/dist ./dist
+EXPOSE 8080
+HEALTHCHECK --interval=30s --timeout=5s --start-period=5s --retries=3 \
+  CMD node -e "require('http').get('http://localhost:8080/health', (r) => process.exit(r.statusCode === 200 ? 0 : 1))"
+CMD ["node", "dist/index.js"]

README.md

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+# MetaMesh Plugin: Subtitle
+
+A MetaMesh plugin that processes subtitle files and links them to videos.
+
+## Description
+
+This plugin handles subtitle file processing:
+
+**For subtitle files (`.srt`, `.ass`, `.ssa`, `.vtt`):**
+- Detects subtitle language using content analysis
+- Finds sibling video files with matching names
+
+**For video files:**
+- Discovers associated subtitle files in the same directory
+
+## Metadata Fields
+
+| Field | Description |
+|-------|-------------|
+| `subtitleLanguage` | Detected language of subtitle content |
+| `linkedVideoName` | Name of associated video file |
+| `subtitleFile/{ext}` | Associated subtitle filename by extension |
+
+## Dependencies
+
+- Requires `file-info` plugin to run first
+
+## Configuration
+
+No configuration required.
+
+## API Endpoints
+
+| Endpoint | Method | Description |
+|----------|--------|-------------|
+| `/health` | GET | Health check |
+| `/manifest` | GET | Plugin manifest |
+| `/configure` | POST | Update configuration |
+| `/process` | POST | Process a file |
+
+## Running Locally
+
+```bash
+npm install
+npm run build
+npm start
+```
+
+## Docker
+
+```bash
+docker build -t metamesh-plugin-subtitle .
+docker run -p 8080:8080 metamesh-plugin-subtitle
+```
+
+## Environment Variables
+
+| Variable | Default | Description |
+|----------|---------|-------------|
+| `PORT` | `8080` | HTTP server port |
+| `HOST` | `0.0.0.0` | HTTP server host |
+
+## License
+
+MIT

package.json

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+{
+  "name": "@metazla/plugin-subtitle",
+  "version": "1.0.0",
+  "description": "MetaMesh plugin: Processes subtitle files and links",
+  "type": "module",
+  "main": "dist/index.js",
+  "scripts": { "build": "tsc", "start": "node dist/index.js" },
+  "dependencies": { "fastify": "^5.0.0", "franc-min": "^6.2.0" },
+  "devDependencies": { "@types/node": "^20.0.0", "typescript": "^5.3.0" }
+}

src/index.ts

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+import Fastify from 'fastify';
+import type { HealthResponse, ProcessRequest, ProcessResponse, CallbackPayload, ConfigureRequest, ConfigureResponse } from './types.js';
+import { manifest, process as processFile } from './plugin.js';
+
+const app = Fastify({ logger: true });
+let ready = false;
+
+app.get('/health', async (): Promise<HealthResponse> => ({ status: 'healthy', ready, version: manifest.version }));
+app.get('/manifest', async () => manifest);
+app.post<{ Body: ConfigureRequest }>('/configure', async (request): Promise<ConfigureResponse> => {
+    console.log(`[${manifest.id}] Configuration updated`);
+    return { status: 'ok' };
+});
+app.post<{ Body: ProcessRequest }>('/process', async (request, reply) => {
+    const { taskId, cid, filePath, callbackUrl, metaCoreUrl } = request.body;
+    if (!taskId || !cid || !filePath || !callbackUrl || !metaCoreUrl) {
+        return reply.send({ status: 'rejected', error: 'Missing required fields' } as ProcessResponse);
+    }
+    processFile(request.body, async (payload: CallbackPayload) => {
+        try { await fetch(callbackUrl, { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(payload) }); }
+        catch (error) { console.error(`[${manifest.id}] Callback error:`, error); }
+    }).catch(console.error);
+    return reply.send({ status: 'accepted' } as ProcessResponse);
+});
+
+const port = parseInt(process.env.PORT || '8080', 10);
+app.listen({ port, host: '0.0.0.0' }).then(() => { ready = true; console.log(`[${manifest.id}] Listening on port ${port}`); });
+process.on('SIGTERM', async () => { ready = false; await app.close(); process.exit(0); });

src/meta-core-client.ts

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+/**
+ * meta-core API Client for writing metadata
+ * Fails gracefully if meta-core is unavailable (logs warning, returns without throwing)
+ */
+
+export class MetaCoreClient {
+    constructor(private baseUrl: string) {}
+
+    private async safeFetch(url: string, options: RequestInit): Promise<Response | null> {
+        try {
+            return await fetch(url, { ...options, signal: AbortSignal.timeout(5000) });
+        } catch (error) {
+            console.warn(`[MetaCoreClient] Warning: meta-core unavailable at ${this.baseUrl}`);
+            return null;
+        }
+    }
+
+    async setProperty(hashId: string, key: string, value: string): Promise<void> {
+        const response = await this.safeFetch(`${this.baseUrl}/meta/${hashId}/${key}`, {
+            method: 'PUT',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({ value }),
+        });
+        if (response && !response.ok) {
+            console.warn(`[MetaCoreClient] Failed to set property: ${response.status}`);
+        }
+    }
+
+    async getProperty(hashId: string, key: string): Promise<string | null> {
+        const response = await this.safeFetch(`${this.baseUrl}/meta/${hashId}/${key}`, { method: 'GET' });
+        if (!response || response.status === 404) return null;
+        if (!response.ok) return null;
+        const data = await response.json() as { value?: string };
+        return data.value ?? null;
+    }
+
+    async mergeMetadata(hashId: string, metadata: Record<string, string>): Promise<void> {
+        const response = await this.safeFetch(`${this.baseUrl}/meta/${hashId}`, {
+            method: 'PATCH',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify(metadata),
+        });
+        if (response && !response.ok) {
+            console.warn(`[MetaCoreClient] Failed to merge metadata: ${response.status}`);
+        }
+    }
+
+    async deleteProperty(hashId: string, key: string): Promise<void> {
+        const response = await this.safeFetch(`${this.baseUrl}/meta/${hashId}/${key}`, { method: 'DELETE' });
+        if (response && !response.ok && response.status !== 404) {
+            console.warn(`[MetaCoreClient] Failed to delete property: ${response.status}`);
+        }
+    }
+
+    async addToSet(hashId: string, key: string, value: string): Promise<void> {
+        const response = await this.safeFetch(`${this.baseUrl}/meta/${hashId}/_add/${key}`, {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({ value }),
+        });
+        if (response && !response.ok) {
+            console.warn(`[MetaCoreClient] Failed to add to set: ${response.status}`);
+        }
+    }
+
+    async getMetadata(hashId: string): Promise<Record<string, string>> {
+        const response = await this.safeFetch(`${this.baseUrl}/meta/${hashId}`, { method: 'GET' });
+        if (!response || response.status === 404) return {};
+        if (!response.ok) return {};
+        const data = await response.json() as { metadata?: Record<string, string> };
+        return data.metadata ?? {};
+    }
+}

src/plugin.ts

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+/**
+ * Subtitle Plugin
+ * Processes subtitle files and links them to videos
+ */
+
+import { readFile, access, readdir } from 'fs/promises';
+import { dirname, basename, extname, join } from 'path';
+import { franc } from 'franc-min';
+import type { PluginManifest, ProcessRequest, CallbackPayload } from './types.js';
+import { MetaCoreClient } from './meta-core-client.js';
+
+export const manifest: PluginManifest = {
+    id: 'subtitle',
+    name: 'Subtitle Processor',
+    version: '1.0.0',
+    description: 'Processes subtitle files and links them to videos',
+    author: 'MetaMesh',
+    dependencies: ['file-info'],
+    priority: 45,
+    color: '#00BCD4',
+    defaultQueue: 'fast',
+    timeout: 30000,
+    schema: {
+        subtitleLanguage: { label: 'Subtitle Language', type: 'string', readonly: true },
+        videos: { label: 'Linked Videos', type: 'array', readonly: true },
+        subtitles: { label: 'Linked Subtitles', type: 'array', readonly: true },
+    },
+    config: {},
+};
+
+const VIDEO_EXTENSIONS = new Set(['mp4', 'mkv', 'avi', 'mov', 'wmv', 'flv', 'webm', 'm4v']);
+const SUBTITLE_EXTENSIONS = new Set(['srt', 'ass', 'ssa', 'vtt', 'sub']);
+
+async function fileExists(path: string): Promise<boolean> {
+    try {
+        await access(path);
+        return true;
+    } catch {
+        return false;
+    }
+}
+
+export async function process(
+    request: ProcessRequest,
+    sendCallback: (payload: CallbackPayload) => Promise<void>
+): Promise<void> {
+    const startTime = Date.now();
+    const metaCore = new MetaCoreClient(request.metaCoreUrl);
+
+    try {
+        const { cid, filePath, existingMeta } = request;
+        const fileType = existingMeta?.fileType;
+
+        if (fileType === 'subtitle') {
+            // For subtitle files: detect language and find sibling videos
+            try {
+                const content = await readFile(filePath, { encoding: 'utf8', flag: 'r' });
+                const sample = content.slice(0, 4096);
+                const lang = franc(sample);
+                if (lang && lang !== 'und') {
+                    await metaCore.setProperty(cid, 'subtitleLanguage', lang);
+                }
+            } catch {
+                // Ignore read errors
+            }
+
+            // Find sibling videos
+            const dir = dirname(filePath);
+            const baseName = basename(filePath, extname(filePath));
+            try {
+                const files = await readdir(dir);
+                for (const file of files) {
+                    const ext = extname(file).slice(1).toLowerCase();
+                    if (VIDEO_EXTENSIONS.has(ext)) {
+                        const videoBase = basename(file, extname(file));
+                        // Check if video name matches subtitle base name
+                        if (videoBase === baseName || baseName.startsWith(videoBase)) {
+                            // We don't have CID for sibling, just note the relationship
+                            await metaCore.setProperty(cid, 'linkedVideoName', file);
+                        }
+                    }
+                }
+            } catch {
+                // Ignore directory read errors
+            }
+        } else if (fileType === 'video') {
+            // For video files: find sibling subtitles
+            const extension = existingMeta?.extension || '';
+            for (const subExt of ['srt', 'ass', 'ssa', 'vtt']) {
+                const subPath = filePath.replace(new RegExp(`\\.${extension}$`, 'i'), `.${subExt}`);
+                if (await fileExists(subPath)) {
+                    await metaCore.setProperty(cid, `subtitleFile/${subExt}`, basename(subPath));
+                }
+            }
+        }
+
+        await sendCallback({
+            taskId: request.taskId,
+            status: 'completed',
+            duration: Date.now() - startTime,
+        });
+    } catch (error) {
+        await sendCallback({
+            taskId: request.taskId,
+            status: 'failed',
+            duration: Date.now() - startTime,
+            error: error instanceof Error ? error.message : String(error),
+        });
+    }
+}

src/types.ts

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+/**
+ * MetaMesh Plugin Types
+ */
+
+export interface PluginManifest {
+    id: string;
+    name: string;
+    version: string;
+    description?: string;
+    author?: string;
+    dependencies?: string[];
+    schema?: Record<string, SchemaField>;
+    config?: Record<string, ConfigField>;
+    priority?: number;
+    color?: string;
+    defaultQueue?: 'fast' | 'background';
+    timeout?: number;
+}
+
+export interface SchemaField {
+    label: string;
+    type?: 'string' | 'number' | 'boolean' | 'select' | 'text' | 'array' | 'json' | 'cid';
+    readonly?: boolean;
+    hint?: string;
+}
+
+export interface ConfigField {
+    type: 'string' | 'number' | 'boolean' | 'select';
+    label?: string;
+    required?: boolean;
+    default?: unknown;
+    secret?: boolean;
+}
+
+export interface HealthResponse {
+    status: 'healthy' | 'unhealthy';
+    ready: boolean;
+    version: string;
+}
+
+export interface ProcessRequest {
+    taskId: string;
+    cid: string;
+    filePath: string;
+    callbackUrl: string;
+    metaCoreUrl: string;
+    existingMeta?: Record<string, string>;
+}
+
+export interface ProcessResponse {
+    status: 'accepted' | 'rejected';
+    error?: string;
+}
+
+export interface CallbackPayload {
+    taskId: string;
+    status: 'completed' | 'failed' | 'skipped';
+    duration: number;
+    error?: string;
+    reason?: string;
+}
+
+export interface ConfigureRequest {
+    config: Record<string, unknown>;
+}
+
+export interface ConfigureResponse {
+    status: 'ok' | 'error';
+    error?: string;
+}

tsconfig.json

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+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "lib": ["ES2022"],
+    "outDir": "./dist",
+    "rootDir": "./src",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true,
+    "declaration": true,
+    "sourceMap": true
+  },
+  "include": ["src/**/*"],
+  "exclude": ["node_modules", "dist"]
+}