Function tryDuplicateFileForSameSizes

pro/src/conflictLogic.ts:242–299

* 1. download remote * 2. compare * 3. if the same, update local but not upload * 4. if not the same, rename local and save remote

(
  key: string,
  key2: string,
  fsLocal: FakeFs,
  fsRemote: FakeFs,
  uploadCallback: (entity: Entity | undefined) => Promise<any>,
  downloadCallback: (entity: Entity | undefined) => Promise<any>
)

 * 4. if not the same, rename local and save remote
 */
async function tryDuplicateFileForSameSizes(
  key: string,
  key2: string,
  fsLocal: FakeFs,
  fsRemote: FakeFs,
  uploadCallback: (entity: Entity | undefined) => Promise<any>,
  downloadCallback: (entity: Entity | undefined) => Promise<any>
) {
  console.debug(`tryDuplicateFileForSameSizes: ${key}`);

  // 1. download
  const remoteContent = await fsRemote.readFile(key);

  // 2. compare
  const localContent = await fsLocal.readFile(key);
  const eq = arraysAreEqual(localContent, remoteContent);

  if (eq) {
    // 3. if the same, update local but not upload
    // read meta of remote, as if we have downloaded the file
    console.debug(`tryDuplicateFileForSameSizes: ${key} content equal`);
    const entityRemote = await fsRemote.stat(key);

    // write
    const downloadResultEntity = await fsLocal.writeFile(
      key,
      remoteContent,
      entityRemote.mtimeCli ?? Date.now(),
      entityRemote.mtimeCli ?? Date.now()
    );
    await downloadCallback(downloadResultEntity);

    // no uploadCallback here
  } else {
    // 4. if not the same, rename local and save remote
    console.debug(`tryDuplicateFileForSameSizes: ${key} content not equal`);

    await fsLocal.rename(key, key2);

    const entityRemote = await fsRemote.stat(key);
    const downloadResultEntity = await fsLocal.writeFile(
      key,
      remoteContent,
      entityRemote.mtimeCli ?? Date.now(),
      entityRemote.mtimeCli ?? Date.now()
    );
    await downloadCallback(downloadResultEntity);

    const entityLocal = await fsLocal.stat(key2); // key2 here!
    const uploadResultEntity = await fsRemote.writeFile(
      key2, // key2 here!
      localContent,
      entityLocal.mtimeCli ?? Date.now(),
      entityLocal.mtimeCli ?? Date.now()
    );
    await uploadCallback(uploadResultEntity);
  }
}