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import * as PHOTOS_LIBRARY from './constants.js';
import {Album, AlbumType} from './model/album.js';
import fs from 'fs';
import {Asset} from './model/asset.js';
import {PLibraryEntities} from './model/photos-entity.js';
import {iCPSError} from '../../app/error/error.js';
import {LIBRARY_ERR} from '../../app/error/error-codes.js';
import {Zones} from '../icloud/icloud-photos/query-builder.js';
import {Resources} from '../resources/main.js';
import {iCPSEventRuntimeWarning} from '../resources/events-types.js';
type PathTuple = [namePath: string, uuidPath: string]
/**
* This class holds the local data structure
*/
export class PhotosLibrary {
/**
* The full path to the sub-dir within 'photoDataDir', containing all assets from the primary library
*/
primaryAssetDir: string;
/**
* The full path to the sub-dir within 'photoDataDir', containing all assets from the shared library
*/
sharedAssetDir: string;
/**
* The full path to the sub-dir within 'photoDataDir', containing all archived folders, who have been deleted on the backend
*/
archiveDir: string;
/**
* The full path to the sub-dir within 'archiveDir', containing temporarily stashed albums
*/
stashDir: string;
/**
* Creates the local PhotoLibrary
* @throws An iCPSError if the library version does not match
*/
constructor() {
if (Resources.manager().libraryVersion !== PHOTOS_LIBRARY.LIBRARY_VERSION) {
throw new iCPSError(LIBRARY_ERR.VERSION_MISMATCH)
.addMessage(`The library version of the local library (${Resources.manager().libraryVersion}) does not match the expected version (${PHOTOS_LIBRARY.LIBRARY_VERSION})`);
}
this.primaryAssetDir = this.getFullPathAndCreate([PHOTOS_LIBRARY.PRIMARY_ASSET_DIR]);
this.sharedAssetDir = this.getFullPathAndCreate([PHOTOS_LIBRARY.SHARED_ASSET_DIR]);
this.archiveDir = this.getFullPathAndCreate([PHOTOS_LIBRARY.ARCHIVE_DIR]);
this.stashDir = this.getFullPathAndCreate([PHOTOS_LIBRARY.ARCHIVE_DIR, PHOTOS_LIBRARY.STASH_DIR]);
}
/**
* Joins the subpaths & photosDataDir together and creates the folder recursively if it does not exist
* @param subpaths - An array of subpaths
* @returns The full path
*/
getFullPathAndCreate(subpaths: string[]): string {
const thisDir = path.join(Resources.manager().dataDir, ...subpaths);
if (!fs.existsSync(thisDir)) {
Resources.logger(this).debug(`${thisDir} does not exist, creating`);
fs.mkdirSync(thisDir, {recursive: true});
}
return thisDir;
}
/**
* Loads all assets from disk
* @returns A structured list of assets, as they are currently present on disk
*/
async loadAssets(): Promise<PLibraryEntities<Asset>> {
return {
...await this.loadAssetsForZone(Zones.Primary),
...await this.loadAssetsForZone(Zones.Shared),
};
}
/**
* Loads all assets from disk for a given zone
* @param zone - Either 'primary' or 'shared'
* @returns A structured list of assets, as they are currently present on disk
* @emits iCPSEventRuntimeWarning.FILETYPE_ERROR - If a file with an unknown extension is found
* @emits iCPSEventRuntimeWarning.LIBRARY_LOAD_ERROR - If any other error occurs while loading an asset
*/
async loadAssetsForZone(zone: Zones): Promise<PLibraryEntities<Asset>> {
const libAssets: PLibraryEntities<Asset> = {};
const zonePath = zone === Zones.Primary ? this.primaryAssetDir : this.sharedAssetDir;
(await fs.promises.readdir(zonePath, {withFileTypes: true}))
.filter(file => file.isFile())
.filter(file => PHOTOS_LIBRARY.SAFE_FILES.every(regex => !regex.test(file.name)))
.forEach(file => {
const filePath = path.format({
dir: zonePath,
base: file.name,
});
try {
const fileStat = fs.statSync(filePath);
const asset = Asset.fromFile(file.name, fileStat, zone);
libAssets[asset.getUUID()] = asset;
Resources.logger(this).debug(`Loaded asset ${asset.getDisplayName()}`);
} catch (err) {
if (err instanceof iCPSError && err.code === LIBRARY_ERR.UNKNOWN_FILETYPE_EXTENSION.code) {
Resources.emit(iCPSEventRuntimeWarning.FILETYPE_ERROR, err.context.extension);
}
Resources.emit(iCPSEventRuntimeWarning.LIBRARY_LOAD_ERROR, err, filePath);
}
});
return libAssets;
}
/**
* Recursively loads all albums from disk
* @returns A structured list of albums, as they are currently present on disk
*/
async loadAlbums(): Promise<PLibraryEntities<Album>> {
// Loading folders
const libAlbums: PLibraryEntities<Album> = {};
(await this.loadAlbum(Album.getRootAlbum(), Resources.manager().dataDir))
.forEach(album => {
libAlbums[album.getUUID()] = album;
});
return libAlbums;
}
/**
* Loads the content of a given album from disc (and recursively does that for all child items)
* @param album - The album that needs to be loaded, containing a filepath
* @returns An array of loaded albums, including the provided one and all its child items
*/
async loadAlbum(album: Album, albumPath: string): Promise<Album[]> {
// If we are loading an archived folder, we can ignore the content and add it to the queue
if (album.albumType === AlbumType.ARCHIVED) {
return [album];
}
const albums: Album[] = [];
// Not adding dummy album
if (album.getUUID().length > 0 && album.getUUID() !== PHOTOS_LIBRARY.STASH_DIR) {
albums.push(album);
}
Resources.logger(this).info(`Loading album ${album.getDisplayName()}`);
const symbolicLinks = (await fs.promises.readdir(albumPath, {
withFileTypes: true,
})).filter(file => file.isSymbolicLink());
Resources.logger(this).debug(`Found ${symbolicLinks.length} symbolic links in ${album.getDisplayName()}`);
for (const link of symbolicLinks) {
// If we are loading a folder, we need to iterate over it's contents UUIDs
if (album.albumType === AlbumType.FOLDER) {
let loadedAlbum: Album;
let fullPath: string;
try {
[loadedAlbum, fullPath] = await this.readFolderFromDisk(link.name, albumPath, album.getUUID());
albums.push(...await this.loadAlbum(loadedAlbum, fullPath));
} catch (err) {
// This error might be caused by a dead symlink, let's check
await this.removeDeadSymlink(path.join(albumPath, link.name), err);
}
}
if (album.albumType === AlbumType.ALBUM) { // If we are loading an album, we need to get the assets from their UUID based folder
const target = await fs.promises.readlink(path.join(albumPath, link.name));
const uuidFile = path.parse(target).base;
albums[0].assets[uuidFile] = link.name;
}
}
return albums;
}
/**
* Will try and remove a dead symlink
* @param symlinkPath - Location of the potential dead symlink
* @param cause - Optional cause of the execution of this function
* @throws An iCPSError in case the provided path is NOT a dead symlink
*/
async removeDeadSymlink(symlinkPath: string, cause?: Error) {
try {
// Checking if there is actually a dead symlink
if (await fs.promises.lstat(symlinkPath) && !fs.existsSync(symlinkPath)) {
return await fs.promises.unlink(symlinkPath);
}
throw new iCPSError(LIBRARY_ERR.UNKNOWN_SYMLINK_ERROR)
.addMessage(symlinkPath)
.addCause(cause);
} catch (err) {
throw new iCPSError(LIBRARY_ERR.UNKNOWN_SYMLINK_ERROR)
.addMessage(symlinkPath)
.addCause(err);
}
}
/**
* Creates a shallow album, by reading the basic information from disk
* @param folderName - The foldername that will link to the uuid
* @param parentFolderPath - The path of the parent's folder
* @param parentUUID - The parent Album UUID
* @returns The shallow Album and its path
*/
async readFolderFromDisk(folderName: string, parentFolderPath: string, parentUUID: string): Promise<[Album, string]> {
const uuidFolderName = await fs.promises.readlink(path.join(parentFolderPath, folderName));
const uuid = path.basename(uuidFolderName).substring(1); // Removing leading '.'
const fullPath = path.join(parentFolderPath, uuidFolderName);
const folderType = await this.readAlbumTypeFromPath(fullPath);
const loadedAlbum = new Album(uuid, folderType, folderName, parentUUID);
return [loadedAlbum, fullPath];
}
/**
* Derives the album type of a given folder, based on its content
* @param thisPath - The path to the folder on disk
* @returns The album type of the folder
* @emits iCPSEventRuntimeWarning.EXTRANEOUS_FILE - If an album contains extraneous files (instead of only symlinks)
*/
async readAlbumTypeFromPath(thisPath: string): Promise<AlbumType> {
// If the folder contains other folders, it will be of AlbumType.Folder
const directoryPresent = (await fs.promises.readdir(thisPath, {
withFileTypes: true,
})).some(file => file.isDirectory());
const dirContent = await fs.promises.readdir(thisPath, {
withFileTypes: true,
});
// If there are files in the folders, the folder is treated as archived
const filePresent = dirContent
.filter(file => PHOTOS_LIBRARY.SAFE_FILES.every(regex => !regex.test(file.name)))
.some(file => file.isFile());
if (directoryPresent) {
// AlbumType.Folder cannot be archived!
if (filePresent) {
Resources.emit(iCPSEventRuntimeWarning.EXTRANEOUS_FILE, thisPath);
}
return AlbumType.FOLDER;
}
if (filePresent) {
return AlbumType.ARCHIVED;
}
return AlbumType.ALBUM;
}
/**
* Deletes the specified asset from disk
* @param asset - The asset that needs to be removed
* @returns A promise, that resolves once the asset was deleted from disk
*/
async deleteAsset(asset: Asset) {
Resources.logger(this).info(`Deleting asset ${asset.getDisplayName()}`);
await fs.promises.rm(asset.getAssetFilePath(), {force: true});
}
/**
* Verifies if a given Asset object is present on disk
* @param asset - The asset to verify
* @returns True, if the Asset object is present on disk
* @throws An error, in case the object cannot be verified
*/
async verifyAsset(asset: Asset): Promise<boolean> {
Resources.logger(this).debug(`Verifying asset ${asset.getDisplayName()}`);
return asset.verify();
}
/**
* Finds the absolute paths of the folder pair for a given album
* The path is created, by finding the parent on filesystem. The folder paths do not necessarily exist, the parent path needs to exist.
* @param album - The album
* @returns A tuple containing the albumNamePath, uuidPath
* @throws An iCPSError, if the parent path cannot be found
*/
findAlbumPaths(album: Album): PathTuple {
// Directory path of the parent folder
let parentPath = Resources.manager().dataDir;
if (album.parentAlbumUUID) {
const parentPathExt = this.findAlbumByUUIDInPath(album.parentAlbumUUID, Resources.manager().dataDir);
if (parentPathExt.length === 0) {
throw new iCPSError(LIBRARY_ERR.NO_PARENT)
.addMessage(album.getDisplayName())
.addContext(`album`, album);
}
parentPath = path.join(parentPath, parentPathExt);
}
// LinkedAlbum will be the visible album, with the correct name
const albumNamePath = path.join(parentPath, album.getSanitizedFilename());
// AlbumPath will be the actual directory, having the UUID as foldername
const uuidPath = path.join(parentPath, `.${album.getUUID()}`);
return [albumNamePath, uuidPath];
}
/**
* Creates a path tuple containing the full path to the stashed album
* @param album - The album within the stash
* @returns A PathTuple containing the name based and UUID based path (not validated)
*/
findStashAlbumPaths(album: Album): PathTuple {
const stashedAlbumNamePath = path.join(this.stashDir, path.basename(album.getSanitizedFilename()));
const stashedUUIDPath = path.join(this.stashDir, path.basename(`.${album.getUUID()}`));
return [stashedAlbumNamePath, stashedUUIDPath];
}
/**
* Finds a given album in a given path (as long as it is within the directory tree)
* @param albumUUID - The UUID of the album
* @param rootPath - The path in which the album should be searched
* @returns The path to the album, relative to the provided path, or the empty string if the album could not be found, or the full path including photoDataDir, if _rootPath was undefined
* @throws An iCPSError, if multiple albums with the same UUID are found
*/
findAlbumByUUIDInPath(albumUUID: string, rootPath: string): string {
// Get all folders in the path
const foldersInPath = fs.readdirSync(rootPath, {withFileTypes: true}).filter(dirent => dirent.isDirectory());
// See if the searched folder is in the path
const filteredFolder = foldersInPath.filter(folder => folder.name === `.${albumUUID}`); // Since the folder is hidden, a dot is prefacing it
if (filteredFolder.length === 1) {
return filteredFolder[0].name;
}
// No luck in the current folder. Looking in all child folders
// This will contain either empty strings or the path to the searched album
const searchResult = foldersInPath.map(folder => {
// Look into each folder and see if the album can be found there
const result = this.findAlbumByUUIDInPath(albumUUID, path.join(rootPath, folder.name));
if (result !== ``) { // We've got a match and it should have returned
return path.join(folder.name, result);
}
// No luck in this directory tree
return ``;
}).filter(result => result !== ``); // Removing non-matches
if (searchResult.length === 1) {
Resources.logger(this).debug(`Found folder ${albumUUID} in ${rootPath}`);
return searchResult[0];
}
if (searchResult.length > 1) {
throw new iCPSError(LIBRARY_ERR.MULTIPLE_MATCHES)
.addMessage(`${albumUUID} in path ${rootPath}`)
.addContext(`searchResult`, searchResult);
}
// No match in this folder hierarchy
return ``;
}
/**
* Writes a given album to disk & links the necessary assets
* @param album - The album to be written to disk
* @throws An iCPSError, if any album related directories already exist
*/
writeAlbum(album: Album) {
const [albumNamePath, uuidPath] = this.findAlbumPaths(album);
if (fs.existsSync(uuidPath)) {
throw new iCPSError(LIBRARY_ERR.EXISTS)
.addMessage(uuidPath)
.addContext(`album`, album);
}
if (fs.existsSync(albumNamePath)) {
throw new iCPSError(LIBRARY_ERR.EXISTS)
.addMessage(albumNamePath)
.addContext(`album`, album);
}
// Creating album
Resources.logger(this).debug(`Creating folder ${uuidPath}`);
fs.mkdirSync(uuidPath, {recursive: true});
// Symlinking to correctly named album
Resources.logger(this).debug(`Linking ${albumNamePath} to ${path.basename(uuidPath)}`);
fs.symlinkSync(path.basename(uuidPath), albumNamePath);
// @remarks Something is wrong here - see E2E test
if (album.albumType === AlbumType.ALBUM) {
this.linkAlbumAssets(album, uuidPath);
}
}
/**
* Links the assets for the given album
* @remarks ALbums only refer to PrimaryAssets - hardcoding this
* @param album - Album holding information about the linked assets
* @param albumPath - Album path to link assets to
* @emits iCPSEventRuntimeWarning.LINK_ERROR - If linking of an asset fails
*/
linkAlbumAssets(album: Album, albumPath: string) {
Object.keys(album.assets).forEach(assetUUID => {
const linkedAsset = path.format({
dir: albumPath,
base: album.assets[assetUUID],
});
const assetPath = path.format({
dir: this.primaryAssetDir,
base: assetUUID,
});
// Relative asset path is relative to album, not the linkedAsset
const relativeAssetPath = path.relative(albumPath, assetPath);
try {
Resources.logger(this).debug(`Linking ${relativeAssetPath} to ${linkedAsset}`);
// Getting asset time, in order to update link as well
const assetTime = fs.statSync(assetPath).mtime;
fs.symlinkSync(relativeAssetPath, linkedAsset);
fs.lutimesSync(linkedAsset, assetTime, assetTime);
} catch (err) {
Resources.emit(iCPSEventRuntimeWarning.LINK_ERROR, err, assetPath, linkedAsset);
}
});
}
/**
* Deletes the given album. The folder will only be deleted, if it contains no 'real' files
* @param album - The album that needs to be removed
* @throws An iCPSError, if the album is not empty or could not be found
*/
deleteAlbum(album: Album) {
Resources.logger(this).debug(`Deleting folder ${album.getDisplayName()}`);
const [albumNamePath, uuidPath] = this.findAlbumPaths(album);
// Path to album
if (!fs.existsSync(uuidPath)) {
throw new iCPSError(LIBRARY_ERR.FIND_PATH)
.addMessage(uuidPath);
}
// Checking content
const pathContent = fs.readdirSync(uuidPath, {withFileTypes: true})
.filter(item => !item.isSymbolicLink()) // Filter out symbolic links, we are fine with deleting those as well as the 'safe' files
.filter(file => PHOTOS_LIBRARY.SAFE_FILES.every(regex => !regex.test(file.name)));
if (pathContent.length > 0) {
throw new iCPSError(LIBRARY_ERR.NOT_EMPTY)
.addMessage(uuidPath)
.addContext(`pathContent`, pathContent);
}
// Path to real name folder
if (!fs.existsSync(albumNamePath)) {
throw new iCPSError(LIBRARY_ERR.FIND_PATH)
.addMessage(albumNamePath);
}
fs.rmSync(uuidPath, {recursive: true});
fs.unlinkSync(albumNamePath);
Resources.logger(this).debug(`Successfully deleted album ${album.getDisplayName()} at ${albumNamePath} & ${uuidPath}`);
}
/**
* Stashes an archived album in case it was deleted/moved in the remote library
* @param album - The album that needs to be stashed
*/
stashArchivedAlbum(album: Album) {
Resources.logger(this).debug(`Stashing album ${album.getDisplayName()}`);
this.movePathTuple(
this.findAlbumPaths(album),
this.findStashAlbumPaths(album),
);
}
/**
* Tries to retrieve a previously stashed archived album
* @param album - The album that needs to be retrieved
*/
retrieveStashedAlbum(album: Album) {
Resources.logger(this).debug(`Retrieving stashed album ${album.getDisplayName()}`);
this.movePathTuple(
this.findStashAlbumPaths(album),
this.findAlbumPaths(album),
);
}
/**
* Moves & re-links the path tuple - if named path cannot be found, unlinking will be ignored
* Modified time is applied to target's modified and access time (atime is not reliable)
* @param src - The source of folders
* @param dest - The destination of folders
* @throws An iCPSError, if the source paths cannot be found or destination paths already exist
*/
movePathTuple(src: PathTuple, dest: PathTuple) {
const [srcNamePath, srcUUIDPath] = src;
const [destNamePath, destUUIDPath] = dest;
if (!fs.existsSync(srcUUIDPath)) {
throw new iCPSError(LIBRARY_ERR.FIND_PATH)
.addMessage(srcUUIDPath);
}
const srcUUIDStats = fs.statSync(srcUUIDPath);
if (fs.existsSync(destNamePath)) {
throw new iCPSError(LIBRARY_ERR.EXISTS)
.addMessage(destNamePath);
}
if (fs.existsSync(destUUIDPath)) {
throw new iCPSError(LIBRARY_ERR.EXISTS)
.addMessage(destUUIDPath);
}
Resources.logger(this).debug(`Moving ${srcUUIDPath} to ${destUUIDPath}`);
fs.renameSync(srcUUIDPath, destUUIDPath);
fs.utimesSync(destUUIDPath, srcUUIDStats.mtime, srcUUIDStats.mtime);
let srcNameStats: fs.Stats = srcUUIDStats;
try {
srcNameStats = fs.lstatSync(srcNamePath);
fs.unlinkSync(srcNamePath);
} catch (err) {
Resources.logger(this).debug(`Unable to unlink ${srcNamePath}: ${err.message}`);
}
Resources.logger(this).debug(`Re-linking ${destNamePath}`);
fs.symlinkSync(path.basename(destUUIDPath), destNamePath);
fs.lutimesSync(destNamePath, srcNameStats.mtime, srcNameStats.mtime);
}
/**
* This function will look for orphaned albums and remove the unnecessary UUID links to make them more manageable
*/
async cleanArchivedOrphans() {
Resources.logger(this).debug(`Cleaning archived orphans`);
const archivedOrphans = await this.loadAlbum(Album.getStashAlbum(), this.stashDir);
for (const album of archivedOrphans) {
Resources.logger(this).debug(`Found orphaned album ${album}`);
const [namePath, uuidPath] = this.findStashAlbumPaths(album);
let targetPath: string;
let index = 0;
do {
const basename = index === 0 ? path.basename(namePath) : `${path.basename(namePath)}-${index}`;
index++;
targetPath = path.join(this.archiveDir, basename);
} while (fs.existsSync(targetPath));
Resources.logger(this).debug(`Moving ${uuidPath} to ${targetPath}, unlinking ${namePath}`);
await fs.promises.rename(uuidPath, targetPath);
await fs.promises.unlink(namePath);
}
}
} |