Add web+diaspora:// links handler installation

app/assets/javascripts/main.js

@@ -46,3 +46,4 @@
 //= require bootstrap-markdown/bootstrap-markdown
 //= require helpers/markdown_editor
 //= require jquery.are-you-sure
+//= require protocol-handler

app/assets/javascripts/protocol-handler.js

+// @license magnet:?xt=urn:btih:0b31508aeb0634b347b8270c7bee4d411b5d4109&dn=agpl-3.0.txt AGPL-v3-or-Later
+
+function registerDiasporaLinksProtocol() {
+  var protocol = location.protocol;
+  var slashes = protocol.concat("//");
+  var host = slashes.concat(window.location.hostname);
+
+  if (location.port) {
+    host = host.concat(":" + location.port);
+  }
+
+  window.navigator.registerProtocolHandler("web+diaspora", host.concat("/link?q=%s"), document.title);
+}
+
+if (typeof (window.navigator.registerProtocolHandler) === "function") {
+  registerDiasporaLinksProtocol();
+}