MOBILE-4145 core: Handle opening apk files

Co-authored-by: Dani Palou <dani@moodle.com>

scripts/langindex.json

@@ -1474,6 +1474,7 @@
   "core.cannotconnecttrouble": "local_moodlemobileapp",
   "core.cannotconnectverify": "local_moodlemobileapp",
   "core.cannotdownloadfiles": "local_moodlemobileapp",
+  "core.cannotinstallapk": "local_moodlemobileapp",
   "core.cannotlogoutpageblocks": "local_moodlemobileapp",
   "core.cannotopeninapp": "local_moodlemobileapp",
   "core.cannotopeninappdownload": "local_moodlemobileapp",

src/core/lang.json

@@ -18,6 +18,7 @@
     "cannotconnecttrouble": "We're having trouble connecting to your site.",
     "cannotconnectverify": "<strong>Please check the address is correct.</strong>",
     "cannotdownloadfiles": "File downloading is disabled. Please contact your site administrator.",
+    "cannotinstallapk": "For security reasons, you can't install unknown apps on your device from this app. Please open the file using a browser.",
     "cannotlogoutpageblocks": "Please save or discard your changes before continuing.",
     "cannotopeninapp": "This file may not work as expected on this device. Would you like to open it anyway?",
     "cannotopeninappdownload": "This file may not work as expected on this device. Would you like to download it anyway?",

src/core/services/file-helper.ts

@@ -30,6 +30,7 @@ import { makeSingleton, Translate } from '@singletons';
 import { CoreNetworkError } from '@classes/errors/network-error';
 import { CoreConfig } from './config';
 import { CoreCanceledError } from '@classes/errors/cancelederror';
+import { CoreMimetypeUtils } from '@services/utils/mimetype';
 
 /**
  * Provider to provide some helper functions regarding files and packages.
@@ -306,18 +307,23 @@ export class CoreFileHelperProvider {
     }
 
     /**
-     * Whether the file has to be opened in browser (external repository).
-     * The file must have a mimetype attribute.
+     * Whether the file has to be opened in browser.
      *
      * @param file The file to check.
      * @return Whether the file should be opened in browser.
      */
     shouldOpenInBrowser(file: CoreWSFile): boolean {
-        if (!file || !('isexternalfile' in file) || !file.isexternalfile || !file.mimetype) {
+        if (!file.mimetype) {
             return false;
         }
 
         const mimetype = file.mimetype;
+
+        if (!('isexternalfile' in file) || !file.isexternalfile) {
+            return mimetype === 'application/vnd.android.package-archive'
+                || CoreMimetypeUtils.getFileExtension(file.filename ?? '') === 'apk';
+        }
+
         if (mimetype.indexOf('application/vnd.google-apps.') != -1) {
             // Google Docs file, always open in browser.
             return true;

src/core/services/filepool.ts

@@ -1410,6 +1410,19 @@ export class CoreFilepoolProvider {
         return this.getFilePath(siteId, fileId);
     }
 
+    /**
+     * Get the url of a file form its path.
+     *
+     * @param siteId The site ID.
+     * @param path File path.
+     * @returns File url.
+     */
+    async getFileUrlByPath(siteId: string, path: string): Promise<string> {
+        const record = await this.filesTables[siteId].getOne({ path });
+
+        return record.url;
+    }
+
     /**
      * Get site Filepool Folder Path
      *

src/core/services/utils/utils.ts

@@ -36,6 +36,9 @@ import { CoreWindow } from '@singletons/window';
 import { CoreColors } from '@singletons/colors';
 import { CorePromisedValue } from '@classes/promised-value';
 import { CorePlatform } from '@services/platform';
+import { CoreErrorWithOptions } from '@classes/errors/errorwithtitle';
+import { CoreFilepool } from '@services/filepool';
+import { CoreSites } from '@services/sites';
 
 export type TreeNode<T> = T & { children: TreeNode<T>[] };
 
@@ -970,6 +973,23 @@ export class CoreUtilsProvider {
             this.openInApp(path);
 
             return;
+        } else if (extension === 'apk' && CoreApp.isAndroid()) {
+            const url = await CoreUtils.ignoreErrors(
+                CoreFilepool.getFileUrlByPath(CoreSites.getCurrentSiteId(), CoreFile.removeBasePath(path)),
+            );
+
+            // @todo MOBILE-4167: Handle urls with expired tokens.
+
+            throw new CoreErrorWithOptions(
+                Translate.instant('core.cannotinstallapk'),
+                undefined,
+                url
+                    ? [{
+                        text: Translate.instant('core.openinbrowser'),
+                        handler: () => this.openInBrowser(url),
+                    }]
+                    : undefined,
+            );
         }
 
         // Path needs to be decoded, the file won't be opened if the path has %20 instead of spaces and so.