vite-plugin-firebase-messaging-sw/dist/index.cjs.map

Vite plugin to generate a Firebase Cloud Messaging service worker with env-aware configs and dev no-store preview.

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fs from \"fs\";\nimport path from \"path\";\nimport crypto from \"crypto\";\n\nexport type LogLevel = \"info\" | \"warn\" | \"error\" | \"debug\";\nexport type LogMeta = Record<string, unknown> | undefined;\n\nexport const NOW_ISO = () => new Date().toISOString();\n\nexport function sha256(input: string | Buffer) {\n    return crypto.createHash(\"sha256\").update(input).digest(\"hex\");\n}\n\nexport function formatBytes(n: number) {\n    if (n < 1024) return `${n} B`;\n    if (n < 1024 * 1024) return `${(n / 1024).toFixed(1)} kB`;\n    return `${(n / (1024 * 1024)).toFixed(2)} MB`;\n}\n\nexport function createLogger(scope: string) {\n    const pick = (lvl: LogLevel) => (lvl === \"error\" ? console.error : lvl === \"warn\" ? console.warn : console.log);\n    const icon = (lvl: LogLevel) => (lvl === \"info\" ? \"🧩\" : lvl === \"warn\" ? \"⚠️\" : lvl === \"error\" ? \"🛑\" : \"🔎\");\n\n    const log = (level: LogLevel) => (msg: string, meta?: LogMeta) => {\n        const fn = pick(level);\n        const head = `${icon(level)} [${scope}] ${msg}`;\n        meta ? fn(head, meta) : fn(head);\n    };\n\n    return {\n        info: log(\"info\"),\n        warn: log(\"warn\"),\n        error: log(\"error\"),\n        debug: log(\"debug\"),\n    };\n}\n\nexport function ensureDir(dir: string) {\n    if (!fs.existsSync(dir)) fs.mkdirSync(dir, {recursive: true});\n}\n\nexport function writeFileIfChanged(filePath: string, content: string, log = createLogger(\"write\")) {\n    ensureDir(path.dirname(filePath));\n\n    const existed = fs.existsSync(filePath);\n    const oldHash = existed ? sha256(fs.readFileSync(filePath)) : null;\n    const newHash = sha256(content);\n\n    if (!existed || oldHash !== newHash) {\n        fs.writeFileSync(filePath, content, \"utf-8\");\n        const size = fs.statSync(filePath).size;\n        log.info(\"File written\", {\n            path: filePath,\n            size: formatBytes(size),\n            hash: newHash.slice(0, 12),\n            replaced: existed && oldHash !== null,\n        });\n        return {changed: true, size, hash: newHash};\n    }\n\n    log.debug(\"No changes; kept existing file\", {\n        path: filePath,\n        hash: newHash.slice(0, 12),\n    });\n    return {changed: false, size: fs.statSync(filePath).size, hash: newHash};\n}\n\nexport function resolveOutputPath(outputDir: string, filename: string) {\n    const abs = path.resolve(outputDir);\n    ensureDir(abs);\n    return path.join(abs, filename);\n}\n\nexport function readEnv(key: string, fallback?: string) {\n    const v = process.env[key];\n    return v === undefined || v === null || v === \"\" ? fallback : v;\n}","// vite/plugins/generate-firebase-messaging-sw.ts\nimport path from \"node:path\";\nimport type {Plugin, ResolvedConfig, ViteDevServer} from \"vite\";\nimport {\n    createLogger,\n    formatBytes,\n    resolveOutputPath,\n    sha256,\n    writeFileIfChanged,\n    NOW_ISO,\n} from \"./helper\";\n\n// ----------------- types -----------------\n\ntype FirebaseEnvCfg = Record<string, string | undefined>;\n\nexport type FirebaseConfig = {\n    apiKey: string;\n    authDomain: string;\n    projectId: string;\n    storageBucket: string;\n    messagingSenderId: string;\n    appId: string;\n    measurementId?: string;\n};\n\nexport type FcmSwOptions = {\n    outputDir?: string; // where to mirror file (default: \"static\")\n    filename?: string; // default: \"firebase-messaging-sw.js\"\n    firebaseCompatVersion?: string; // default: \"9.22.2\"\n    firebase:\n        | FirebaseConfig\n        | ((\n        ctx: {\n            mode: \"development\" | \"production\";\n            command: \"serve\" | \"build\";\n            config: ResolvedConfig;\n        },\n    ) => FirebaseConfig);\n    meta?: {\n        appEnv?: string;\n        target?: string;\n    };\n    analytics?: {\n        impressionUrl?: string;\n        openUrl?: string;\n        srcParam?: string;\n        cidParam?: string;\n        srcValue?: string;\n    };\n    minify?: boolean;\n    transform?: (code: string) => string;\n};\n\nconst DEFAULTS: Required<\n    Pick<FcmSwOptions, \"outputDir\" | \"filename\" | \"firebaseCompatVersion\">\n> = {\n    outputDir: \"static\",\n    filename: \"firebase-messaging-sw.js\",\n    firebaseCompatVersion: \"9.22.2\",\n};\n\n// ----------------- helpers -----------------\n\nfunction validateFirebaseConfig(cfg: FirebaseEnvCfg): asserts cfg is Record<string, string> {\n    const required = [\n        \"apiKey\",\n        \"authDomain\",\n        \"projectId\",\n        \"storageBucket\",\n        \"messagingSenderId\",\n        \"appId\",\n    ] as const;\n    const missing = required.filter((k) => !cfg[k]);\n    if (missing.length) {\n        throw new Error(`Missing Firebase configs: ${missing.join(\", \")}`);\n    }\n}\n\nconst esc = (s: string) => s.replace(/\\\\/g, \"\\\\\\\\\").replace(/`/g, \"\\\\`\");\n\nfunction jsMinifySimple(code: string) {\n    return (\n        code\n            .replace(/\\/\\*[\\s\\S]*?\\*\\//g, \"\")\n            .replace(/[ \\t]+/g, \" \")\n            .replace(/\\n\\s+/g, \"\\n\")\n            .trim() + \"\\n\"\n    );\n}\n\n// ----------------- template builder -----------------\n\nfunction buildSwTemplate(meta: {\n    appEnv: string;\n    target: string;\n    swVersion: string;\n    generatedAt: string;\n    firebase: FirebaseConfig;\n    analytics: Required<NonNullable<FcmSwOptions[\"analytics\"]>>;\n    compatVersion: string;\n}) {\n    const {appEnv, target, swVersion, generatedAt, firebase, analytics, compatVersion} =\n        meta;\n\n    return `/* Auto-generated at ${generatedAt} */\nimportScripts(\"https://www.gstatic.com/firebasejs/${compatVersion}/firebase-app-compat.js\");\nimportScripts(\"https://www.gstatic.com/firebasejs/${compatVersion}/firebase-messaging-compat.js\");\n\n(function(){\n  const log  = (...a)=>{ try{ console.log(\"[FIREBASE SW]\", ...a);}catch{} };\n  const warn = (...a)=>{ try{ console.warn(\"[FIREBASE SW]\", ...a);}catch{} };\n  const err  = (...a)=>{ try{ console.error(\"[FIREBASE SW]\", ...a);}catch{} };\n\n  const META = {\n    appEnv: \"${esc(appEnv)}\",\n    target: \"${esc(target)}\",\n    swVersion: \"${esc(swVersion)}\",\n    generatedAt: \"${esc(generatedAt)}\"\n  };\n\n  const ANALYTICS = {\n    impressionUrl: \"${esc(analytics.impressionUrl)}\",\n    openUrl: \"${esc(analytics.openUrl)}\",\n    srcParam: \"${esc(analytics.srcParam)}\",\n    cidParam: \"${esc(analytics.cidParam)}\",\n    srcValue: \"${esc(analytics.srcValue)}\"\n  };\n\n  // ... trimmed for brevity (your full SW logic goes here) ...\n})();\n`;\n}\n\n// ----------------- plugin -----------------\n\nexport function generateFirebaseMessagingSw(options: FcmSwOptions): Plugin {\n    const log = createLogger(\"fcm-sw\");\n\n    const outputDir = options.outputDir ?? DEFAULTS.outputDir;\n    const filename = options.filename ?? DEFAULTS.filename;\n    const compatVersion = options.firebaseCompatVersion ?? DEFAULTS.firebaseCompatVersion;\n\n    const analytics = {\n        impressionUrl: options.analytics?.impressionUrl ?? \"\",\n        openUrl: options.analytics?.openUrl ?? \"\",\n        srcParam: options.analytics?.srcParam ?? \"src\",\n        cidParam: options.analytics?.cidParam ?? \"cid\",\n        srcValue: options.analytics?.srcValue ?? \"fcm\",\n    };\n\n    let resolvedConfig: ResolvedConfig;\n    let mode: \"development\" | \"production\" = \"production\";\n    let command: \"serve\" | \"build\" = \"build\";\n    let root = process.cwd();\n    let lastCode = \"\";\n    let lastEtag = \"\";\n\n    const resolveFirebaseConfig = (): FirebaseConfig => {\n        const provided =\n            typeof options.firebase === \"function\"\n                ? options.firebase({mode, command, config: resolvedConfig})\n                : options.firebase;\n\n        const envFallback = {\n            apiKey: process.env.FIREBASE_API_KEY,\n            authDomain: process.env.FIREBASE_AUTH_DOMAIN,\n            projectId: process.env.FIREBASE_PROJECT_ID,\n            storageBucket: process.env.FIREBASE_STORAGE_BUCKET,\n            messagingSenderId: process.env.FIREBASE_MESSAGING_SENDER_ID,\n            appId: process.env.FIREBASE_APP_ID,\n            measurementId: process.env.FIREBASE_MEASUREMENT_ID,\n        };\n\n        const merged: FirebaseEnvCfg = {...envFallback, ...provided};\n        validateFirebaseConfig(merged);\n\n        return {\n            apiKey: merged.apiKey!,\n            authDomain: merged.authDomain!,\n            projectId: merged.projectId!,\n            storageBucket: merged.storageBucket!,\n            messagingSenderId: merged.messagingSenderId!,\n            appId: merged.appId!,\n            ...(merged.measurementId ? {measurementId: merged.measurementId} : {}),\n        };\n    };\n\n    const buildOnce = () => {\n        const appEnv = options.meta?.appEnv ?? mode;\n        const target = options.meta?.target ?? \"web\";\n        const firebase = resolveFirebaseConfig();\n\n        const generatedAt = NOW_ISO();\n        const swVersion = sha256(`${appEnv}:${target}:${generatedAt}`).slice(0, 12);\n\n        let code = buildSwTemplate({\n            appEnv,\n            target,\n            swVersion,\n            generatedAt,\n            firebase,\n            analytics,\n            compatVersion,\n        });\n\n        if (options.minify ?? mode === \"production\") code = jsMinifySimple(code);\n        if (options.transform) code = options.transform(code);\n\n        lastCode = code;\n        lastEtag = sha256(code).slice(0, 12);\n        return {code, etag: lastEtag};\n    };\n\n    return {\n        name: \"vite-plugin-firebase-messaging-sw\",\n        apply: () => true,\n\n        configResolved(config) {\n            resolvedConfig = config;\n            mode = (config.mode as \"development\" | \"production\") ?? \"production\";\n            command = config.command as \"serve\" | \"build\";\n            root = config.root ?? process.cwd();\n        },\n\n        buildStart() {\n            try {\n                const {code} = buildOnce();\n                // Optionally mirror to disk\n                const outPath = resolveOutputPath(path.resolve(root, outputDir), filename);\n                writeFileIfChanged(outPath, code)\n            } catch (e: any) {\n                log.warn(\"Error generating Firebase SW\", {err: e?.message || String(e)});\n                throw e;\n            }\n        },\n\n        generateBundle() {\n            const {code} = buildOnce();\n            this.emitFile({\n                type: \"asset\",\n                fileName: filename,\n                source: code,\n            });\n            log.info(\"FCM SW emitted\", {\n                file: filename,\n                size: formatBytes(Buffer.byteLength(code)),\n                etag: lastEtag,\n            });\n        },\n\n        configureServer(server: ViteDevServer) {\n            const base = (resolvedConfig?.base ?? \"/\").replace(/\\/+$/, \"/\");\n            const route = path.posix.join(base, filename);\n\n            server.middlewares.use(route, (_req, res) => {\n                try {\n                    const {code, etag} = buildOnce();\n                    res.setHeader(\"Content-Type\", \"application/javascript; charset=utf-8\");\n                    res.setHeader(\"Cache-Control\", \"no-store, no-cache, must-revalidate, max-age=0\");\n                    res.setHeader(\"Pragma\", \"no-cache\");\n                    res.setHeader(\"Expires\", \"0\");\n                    res.setHeader(\"ETag\", etag);\n                    res.end(code);\n                } catch (e: any) {\n                    res.statusCode = 500;\n                    res.end(`/* ${String(e?.message || e || \"SW build error\")} */`);\n                }\n            });\n\n            log.info(`dev route mounted → ${route} (no-store)`);\n        },\n    };\n}\n\nexport default generateFirebaseMessagingSw;\n"]}