Allow admins to disable certain external storages for users

Fix issue #6793

apps/files_external/js/settings.js

@@ -302,13 +302,23 @@ $(document).ready(function() {
 	});
 
 	$('#allowUserMounting').bind('change', function() {
+		OC.msg.startSaving('#userMountingMsg');
 		if (this.checked) {
 			OC.AppConfig.setValue('files_external', 'allow_user_mounting', 'yes');
+			$('#userMountingBackups').removeClass('hidden');
 		} else {
 			OC.AppConfig.setValue('files_external', 'allow_user_mounting', 'no');
+			$('#userMountingBackups').addClass('hidden');
 		}
+		OC.msg.finishedSaving('#userMountingMsg', {status: 'success', data: {message: t('settings', 'Saved')}});
 	});
 
+	$('input[name="allowUserMountingBackends\\[\\]"]').bind('change', function() {
+		OC.msg.startSaving('#userMountingMsg');
+		var user_mounting_backends = $('input[name="allowUserMountingBackends\\[\\]"]:checked').map(function(){return $(this).val();}).get();
+		OC.AppConfig.setValue('files_external', 'user_mounting_backends', user_mounting_backends.join());
+		OC.msg.finishedSaving('#userMountingMsg', {status: 'success', data: {message: t('settings', 'Saved')}});
+	});
 });
 
 })();

apps/files_external/lib/config.php

@@ -155,6 +155,35 @@ class OC_Mount_Config {
 		return($backends);
 	}
 
+	/**
+	* Get details on each of the external storage backends, used for the mount config UI
+	* Some backends are not available as a personal backend, f.e. Local and such that have
+	* been disabled by the admin.
+	*
+	* If a custom UI is needed, add the key 'custom' and a javascript file with that name will be loaded
+	* If the configuration parameter should be secret, add a '*' to the beginning of the value
+	* If the configuration parameter is a boolean, add a '!' to the beginning of the value
+	* If the configuration parameter is optional, add a '&' to the beginning of the value
+	* If the configuration parameter is hidden, add a '#' to the beginning of the value
+	* @return array
+	*/
+	public static function getPersonalBackends() {
+
+		$backends = self::getBackends();
+
+		// Remove local storage and other disabled storages
+		unset($backends['\OC\Files\Storage\Local']);
+
+		$allowed_backends = explode(',', OCP\Config::getAppValue('files_external', 'user_mounting_backends', ''));
+		foreach ($backends as $backend => $null) {
+			if (!in_array($backend, $allowed_backends)) {
+				unset($backends[$backend]);
+			}
+		}
+
+		return $backends;
+	}
+
 	/**
 	* Get the system mount points
 	* The returned array is not in the same format as getUserMountPoints()
@@ -287,11 +316,12 @@ class OC_Mount_Config {
 		if (!isset($backends[$class])) {
 			// invalid backend
 			return false;
-		}	
+		}
 		if ($isPersonal) {
 			// Verify that the mount point applies for the current user
-			// Prevent non-admin users from mounting local storage
-			if ($applicable !== OCP\User::getUser() || strtolower($class) === '\oc\files\storage\local') {
+			// Prevent non-admin users from mounting local storage and other disabled backends
+			$allowed_backends = self::getPersonalBackends();
+			if ($applicable != OCP\User::getUser() || !in_array($class, $allowed_backends)) {
 				return false;
 			}
 			$mountPoint = '/'.$applicable.'/files/'.ltrim($mountPoint, '/');

apps/files_external/personal.php

@@ -22,9 +22,8 @@
 
 OCP\Util::addScript('files_external', 'settings');
 OCP\Util::addStyle('files_external', 'settings');
-$backends = OC_Mount_Config::getBackends();
-// Remove local storage
-unset($backends['\OC\Files\Storage\Local']);
+$backends = OC_Mount_Config::getPersonalBackends();
+
 $tmpl = new OCP\Template('files_external', 'settings');
 $tmpl->assign('isAdminPage', false);
 $tmpl->assign('mounts', OC_Mount_Config::getPersonalMountPoints());

apps/files_external/settings.php

@@ -26,10 +26,26 @@ OCP\Util::addScript('files_external', 'settings');
 OCP\Util::addscript('3rdparty', 'chosen/chosen.jquery.min');
 OCP\Util::addStyle('files_external', 'settings');
 OCP\Util::addStyle('3rdparty', 'chosen/chosen');
+
+$backends = OC_Mount_Config::getBackends();
+$personal_backends = array();
+$enabled_backends = explode(',', OCP\Config::getAppValue('files_external', 'user_mounting_backends', ''));
+foreach ($backends as $class => $backend)
+{
+	if ($class != '\OC\Files\Storage\Local')
+	{
+		$personal_backends[$class] = array(
+			'backend'	=> $backend['backend'],
+			'enabled'	=> in_array($class, $enabled_backends),
+		);
+	}
+}
+
 $tmpl = new OCP\Template('files_external', 'settings');
 $tmpl->assign('isAdminPage', true);
 $tmpl->assign('mounts', OC_Mount_Config::getSystemMountPoints());
-$tmpl->assign('backends', OC_Mount_Config::getBackends());
+$tmpl->assign('backends', $backends);
+$tmpl->assign('personal_backends', $personal_backends);
 $tmpl->assign('groups', OC_Group::getGroups());
 $tmpl->assign('users', OCP\User::getUsers());
 $tmpl->assign('userDisplayNames', OC_User::getDisplayNames());

apps/files_external/templates/settings.php

@@ -122,12 +122,18 @@
 
 		<?php if ($_['isAdminPage']): ?>
 			<br />
-			<input type="checkbox"
-				   name="allowUserMounting"
-				   id="allowUserMounting"
-				   value="1" <?php if ($_['allowUserMounting'] == 'yes') print_unescaped(' checked="checked"'); ?> />
-			<label for="allowUserMounting"><?php p($l->t('Enable User External Storage')); ?></label><br/>
-			<em><?php p($l->t('Allow users to mount their own external storage')); ?></em>
+			<input type="checkbox" name="allowUserMounting" id="allowUserMounting"
+				value="1" <?php if ($_['allowUserMounting'] == 'yes') print_unescaped(' checked="checked"'); ?> />
+			<label for="allowUserMounting"><?php p($l->t('Enable User External Storage')); ?></label> <span id="userMountingMsg" class="msg"></span>
+
+			<p id="userMountingBackups"<?php if ($_['allowUserMounting'] != 'yes'): ?> class="hidden"<?php endif; ?>>
+				<?php p($l->t('Allow users to mount the following external storage')); ?><br />
+				<?php $i = 0; foreach ($_['personal_backends'] as $class => $backend): ?>
+					<input type="checkbox" id="allowUserMountingBackends<?php p($i); ?>" name="allowUserMountingBackends[]" value="<?php p($class); ?>" <?php if ($backend['enabled']) print_unescaped(' checked="checked"'); ?> />
+					<label for="allowUserMountingBackends<?php p($i); ?>"><?php p($backend['backend']); ?></label> <br />
+					<?php $i++; ?>
+				<?php endforeach; ?>
+			</p>
 		<?php endif; ?>
 	</fieldset>
 </form>