Share markdown angular filter via client.js

src/js/client.js

@@ -87,6 +87,24 @@ angular.module('Application').filter('prettyDiskSize', function () {
     return function (size, fallback) { return prettyByteSize(size, fallback) || 'Not available yet'; }
 });
 
+angular.module('Application').filter('markdown2html', function () {
+    var converter = new showdown.Converter({
+        extensions: [ 'targetblank' ],
+        simplifiedAutoLink: true,
+        strikethrough: true,
+        tables: true
+    });
+
+    // without this cache, the code runs into some infinite loop (https://github.com/angular/angular.js/issues/3980)
+    var cache = {};
+
+    return function (text) {
+        if (cache[text]) return cache[text];
+        cache[text] = converter.makeHtml(text);
+        return cache[text];
+    };
+});
+
 
 // ----------------------------------------------
 // Cloudron REST API wrapper