{"version":3,"file":"cassette-io.mjs","names":[],"sources":["../../../../../../../ai/src/vcr/cassette-io.ts"],"sourcesContent":["import type { Cassette } from \"./vcr.type\";\n\n/**\n * Lazily-resolved `node:fs/promises` module. VCR cassette I/O only touches\n * disk on construct (load) and on `save()` — keeping the import lazy means\n * importing the `vcr` factory never eagerly pulls `node:fs`, which keeps the\n * surface usable in non-node bundles that never call a disk path.\n */\ntype FsPromises = typeof import(\"node:fs/promises\");\n\nlet fsModule: FsPromises | undefined;\n\n/**\n * Resolve `node:fs/promises` once and memoize it.\n */\nasync function loadFs(): Promise<FsPromises> {\n  if (!fsModule) {\n    fsModule = await import(\"node:fs/promises\");\n  }\n\n  return fsModule;\n}\n\n/**\n * Build a fresh, empty cassette for a model identity. Used when the path\n * does not exist yet (first record run).\n */\nexport function emptyCassette(model: string, provider: string): Cassette {\n  return {\n    version: 1,\n    model,\n    provider,\n    entries: [],\n  };\n}\n\n/**\n * Load a cassette from disk. Returns a fresh empty cassette (not an error)\n * when the file does not exist — the common first-record case. Any other I/O\n * or parse failure rejects so corruption is never silently swallowed.\n */\nexport async function loadCassette(\n  path: string,\n  model: string,\n  provider: string,\n): Promise<Cassette> {\n  const fs = await loadFs();\n\n  let raw: string;\n\n  try {\n    raw = await fs.readFile(path, \"utf8\");\n  } catch (error) {\n    if ((error as NodeJS.ErrnoException).code === \"ENOENT\") {\n      return emptyCassette(model, provider);\n    }\n\n    throw error;\n  }\n\n  const parsed = JSON.parse(raw) as Cassette;\n\n  return {\n    version: 1,\n    model: parsed.model ?? model,\n    provider: parsed.provider ?? provider,\n    entries: Array.isArray(parsed.entries) ? parsed.entries : [],\n  };\n}\n\n/**\n * Write a cassette to disk as pretty-printed JSON, creating the parent\n * directory if needed so a brand-new `./cassettes/foo.json` path just works.\n */\nexport async function saveCassette(path: string, cassette: Cassette): Promise<void> {\n  const fs = await loadFs();\n  const nodePath = await import(\"node:path\");\n  const dir = nodePath.dirname(path);\n\n  if (dir && dir !== \".\" && dir !== path) {\n    await fs.mkdir(dir, { recursive: true });\n  }\n\n  await fs.writeFile(path, JSON.stringify(cassette, undefined, 2), \"utf8\");\n}\n"],"mappings":";AAUA,IAAI;;;;AAKJ,eAAe,SAA8B;CAC3C,IAAI,CAAC,UACH,WAAW,MAAM,OAAO;CAG1B,OAAO;AACT;;;;;AAMA,SAAgB,cAAc,OAAe,UAA4B;CACvE,OAAO;EACL,SAAS;EACT;EACA;EACA,SAAS,CAAC;CACZ;AACF;;;;;;AAOA,eAAsB,aACpB,MACA,OACA,UACmB;CACnB,MAAM,KAAK,MAAM,OAAO;CAExB,IAAI;CAEJ,IAAI;EACF,MAAM,MAAM,GAAG,SAAS,MAAM,MAAM;CACtC,SAAS,OAAO;EACd,IAAK,MAAgC,SAAS,UAC5C,OAAO,cAAc,OAAO,QAAQ;EAGtC,MAAM;CACR;CAEA,MAAM,SAAS,KAAK,MAAM,GAAG;CAE7B,OAAO;EACL,SAAS;EACT,OAAO,OAAO,SAAS;EACvB,UAAU,OAAO,YAAY;EAC7B,SAAS,MAAM,QAAQ,OAAO,OAAO,IAAI,OAAO,UAAU,CAAC;CAC7D;AACF;;;;;AAMA,eAAsB,aAAa,MAAc,UAAmC;CAClF,MAAM,KAAK,MAAM,OAAO;CAExB,MAAM,OAAM,MADW,OAAO,aACV,CAAC,QAAQ,IAAI;CAEjC,IAAI,OAAO,QAAQ,OAAO,QAAQ,MAChC,MAAM,GAAG,MAAM,KAAK,EAAE,WAAW,KAAK,CAAC;CAGzC,MAAM,GAAG,UAAU,MAAM,KAAK,UAAU,UAAU,QAAW,CAAC,GAAG,MAAM;AACzE"}