Check if file exists (in js) before uploading

htdocs/artefact/file/index.php

@@ -39,8 +39,7 @@ foreach ($strings as $string) {
 $javascript = <<<JAVASCRIPT
 
 var browser = new FileBrowser('filelist');
-var uploader = new FileUploader('uploader');
-uploader.uploadcallback = browser.refresh;
+var uploader = new FileUploader('uploader', null, null, browser.refresh, browser.fileexists);
 browser.changedircallback = uploader.updatedestination;
 
 JAVASCRIPT;

htdocs/artefact/file/js/filebrowser.js

@@ -6,6 +6,7 @@ function FileBrowser(element, changedircallback) {
     this.pathids = {'/':null};
     this.cwd = '/';
     this.changedircallback = changedircallback;
+    this.filenames = {};
 
     this.init = function() {
         self.filelist = new TableRenderer(
@@ -106,6 +107,7 @@ function FileBrowser(element, changedircallback) {
     }
 
     this.formatname = function(r) {
+        self.filenames[r.title] = true;
         if (r.artefacttype == 'file') {
             return TD(null, r.title);
         }
@@ -118,10 +120,15 @@ function FileBrowser(element, changedircallback) {
         }
     }
 
+    this.fileexists = function (filename) { 
+        return self.filenames[filename] == true;
+    }
+
     this.changedir = function(path) {
         self.cwd = path;
         self.linked_path();
         self.changedircallback(self.pathids[path], path);
+        self.filenames = {};
         var args = path == '/' ? null : {'folder':self.pathids[path]};
         self.filelist.doupdate(args);
         return false;

htdocs/js/fileuploader.js

 
-function FileUploader(element, foldername, folderid, uploadcallback) {
+function FileUploader(element, foldername, folderid, uploadcallback, fileexists) {
     var self = this;
     this.element = element;
     this.foldername = foldername ? foldername : get_string('home');
     this.folderid = folderid;
     this.uploadcallback = uploadcallback;
 
+    if (typeof(fileexists) == 'function') {
+        this.fileexists = fileexists;
+    }
+    else {
+        this.fileexists = function (filename) { alert(filename); };
+    }
+
     this.init = function() {
         self.nextupload = 1;
 
@@ -70,10 +77,6 @@ function FileUploader(element, foldername, folderid, uploadcallback) {
         }
     }
 
-    this.fileexists = function (filename) {
-        return true;
-    }
-
     this.sendform = function (replace) {
         var localname = self.form.userfile.value;
         if (isEmpty(localname)) {