MOBILE-4642 h5p: Prevent partially saved packages

Author: albertgasset

src/core/features/h5p/classes/file-storage.ts

@@ -449,4 +449,43 @@ export class CoreH5PFileStorage {
         }
     }
 
+    /**
+     * Check that library is fully saved to the file system.
+     *
+     * @param libraryData Library data.
+     * @param siteId Site ID. If not defined, current site.
+     * @returns Promise resolved with true if all library files are present.
+     */
+    async checkLibrary(libraryData: CoreH5PLibraryBeingSaved, siteId?: string): Promise<boolean> {
+        const getFileNames = async (baseDir: string, dirName = ''): Promise<string[]> => {
+            const entries = await CoreFile.getDirectoryContents( baseDir + dirName);
+            const fileNames: string[] = [];
+
+            for (const entry of entries) {
+                const name = dirName + '/' + entry.name;
+                if (entry.isDirectory) {
+                    fileNames.push(...(await getFileNames(baseDir, name)));
+                } else  {
+                    fileNames.push(name);
+                }
+            }
+
+            return fileNames;
+        };
+
+        if (!libraryData.uploadDirectory) {
+            return true;
+        }
+
+        siteId = siteId || CoreSites.getCurrentSiteId();
+        const folderPath = this.getLibraryFolderPath(libraryData, siteId);
+
+        const [sourceFiles, destFiles] = await Promise.all([
+            getFileNames(libraryData.uploadDirectory),
+            getFileNames(folderPath).catch(() => ([])).then(files => new Set(files)),
+        ]);
+
+        return sourceFiles.every(name => destFiles.has(name));
+    }
+
 }

src/core/features/h5p/classes/storage.ts

@@ -65,7 +65,9 @@ export class CoreH5PStorage {
 
                 const newerPatchVersion = existingLibrary.patchversion < libraryData.patchVersion;
 
-                if (!newerPatchVersion) {
+                // Make sure the library is fully saved to the file system if it is present in the DB.
+                // Some files might be missing if a previous library update was interrupted.
+                if (!newerPatchVersion && await this.h5pCore.h5pFS.checkLibrary(libraryData, siteId)) {
                     // Same or older version, no need to save.
                     libraryData.saveDependencies = false;
 
@@ -79,21 +81,12 @@ export class CoreH5PStorage {
             libraryData.metadataSettings = libraryData.metadataSettings ?
                 CoreH5PMetadata.boolifyAndEncodeSettings(libraryData.metadataSettings) : undefined;
 
+            // Save the library files before saving to DB, in case the app is closed while copying the files.
+            await this.h5pCore.h5pFS.saveLibrary(libraryData, siteId);
+
             // Save the library data in DB.
             await this.h5pFramework.saveLibraryData(libraryData, siteId);
 
-            // Now save it in FS.
-            try {
-                await this.h5pCore.h5pFS.saveLibrary(libraryData, siteId);
-            } catch (error) {
-                if (libraryData.libraryId) {
-                    // An error occurred, delete the DB data because the lib FS data has been deleted.
-                    await this.h5pFramework.deleteLibrary(libraryData.libraryId, siteId);
-                }
-
-                throw error;
-            }
-
             if (libraryData.libraryId !== undefined) {
                 const promises: Promise<void>[] = [];
 
@@ -196,21 +189,15 @@ export class CoreH5PStorage {
 
             content.params = JSON.stringify(data.contentJsonData);
 
-            // Save the content data in DB.
-            await this.h5pCore.saveContent(content, folderName, fileUrl, siteId);
-
             // Save the content files in their right place in FS.
             const destFolder = CorePath.concatenatePaths(CoreFileProvider.TMPFOLDER, 'h5p/' + folderName);
             const contentPath = CorePath.concatenatePaths(destFolder, 'content');
 
-            try {
-                await this.h5pCore.h5pFS.saveContent(contentPath, folderName, siteId);
-            } catch (error) {
-                // An error occurred, delete the DB data because the content files have been deleted.
-                await this.h5pFramework.deleteContentData(content.id!, siteId);
+            // Save the content files before saving to DB, in case the app is closed while copying the files.
+            await this.h5pCore.h5pFS.saveContent(contentPath, folderName, siteId);
 
-                throw error;
-            }
+            // Save the content data in DB.
+            await this.h5pCore.saveContent(content, folderName, fileUrl, siteId);
         }
 
         return content;