MDL-29872 Dropbox repository: add message handler to filepicker header and add message to logout from dropbox.

When user clicked on logout button from dropbox repository, it will also logging them out from dropbox site through a popup window

files/renderer.php

@@ -526,6 +526,7 @@ class core_files_renderer extends plugin_renderer_base {
                     <div class="{!}fp-tb-logout"><img src="'.$this->pix_url('a/logout').'" /><a href="#"></a></div>
                     <div class="{!}fp-tb-manage"><a href="#"><img src="'.$this->pix_url('a/setting').'" /> '.get_string('manageurl', 'repository').'</a></div>
                     <div class="{!}fp-tb-help"><a href="#"><img src="'.$this->pix_url('a/help').'" /> '.get_string('help').'</a></div>
+                    <div class="{!}fp-tb-message"></div>
                 </div>
                 <div class="{!}fp-viewbar">
                     <a class="{!}fp-vb-icons" href="#"></a>

repository/dropbox/lang/en/repository_dropbox.php

@@ -33,3 +33,4 @@ $string['instruction'] = 'You can get your API Key and secret from <a href="http
 $string['cachelimit'] = 'Cache limit';
 $string['cachelimit_info'] = 'Enter the maximum size of files (in bytes) to be cached on server for Dropbox aliases/shortcuts. Cached files will be served when the source is no longer available. Empty value or zero mean caching of all files regardless of size.';
 $string['dropbox:view'] = 'View a Dropbox folder';
+$string['logoutdesc'] = '(Logout when you finish using Dropbox)';

repository/dropbox/lib.php

@@ -179,6 +179,8 @@ class repository_dropbox extends repository {
         $list['manage'] = 'https://www.dropbox.com/home';
         $list['dynload'] = true;
         $list['nosearch'] = true;
+        $list['logouturl'] = 'https://www.dropbox.com/logout';
+        $list['message'] = get_string('logoutdesc', 'repository_dropbox');
         // process breadcrumb trail
         $list['path'] = array(
             array('name'=>get_string('dropbox', 'repository_dropbox'), 'path'=>'/')

repository/filepicker.js

@@ -1386,6 +1386,8 @@ M.core_filepicker.init = function(Y, options) {
             this.active_repo.norefresh = (data.login || data.norefresh); // this is either login form or 'norefresh' attribute set
             this.active_repo.nologin = (data.login || data.nologin); // this is either login form or 'nologin' attribute is set
             this.active_repo.logouttext = data.logouttext?data.logouttext:null;
+            this.active_repo.logouturl = (data.logouturl || '');
+            this.active_repo.message = (data.message || '');
             this.active_repo.help = data.help?data.help:null;
             this.active_repo.manage = data.manage?data.manage:null;
             this.print_header();
@@ -1698,6 +1700,9 @@ M.core_filepicker.init = function(Y, options) {
                         callback: this.display_response
                     }, true);
                 }
+                if (this.active_repo.logouturl) {
+                    window.open(this.active_repo.logouturl, 'repo_auth', 'location=0,status=0,width=500,height=300,scrollbars=yes');
+                }
             }, this);
             toolbar.one('.fp-tb-refresh').one('a,button').on('click', function(e) {
                 e.preventDefault();
@@ -1720,7 +1725,7 @@ M.core_filepicker.init = function(Y, options) {
                             callback: this.display_response
                         }, true);
                     }
-                }, this);
+            }, this);
 
             // it does not matter what kind of element is .fp-tb-manage, we create a dummy <a>
             // element and use it to open url on click event
@@ -1817,6 +1822,12 @@ M.core_filepicker.init = function(Y, options) {
             // help url
             enable_tb_control(toolbar.one('.fp-tb-help'), r.help);
             Y.one('#fp-tb-help-'+client_id+'-link').set('href', r.help);
+
+            // message
+            if (toolbar.one('.fp-tb-message')) {
+                enable_tb_control(toolbar.one('.fp-tb-message'), r.message);
+                toolbar.one('.fp-tb-message').setContent(r.message);
+            }
         },
         print_path: function() {
             if (!this.pathbar) {