frontend: add password reset functionality

frontend/js/forgot.js

@@ -0,0 +1,33 @@
+(function (global, document) {
+
+  // Talks to the API and sends an reset email.
+  global.sendResetHex = function() {
+    var all_ok = global.unfilledMark(["#email"], function(el) {
+      el.css("border-bottom", "1px solid red");
+    });
+
+    if (!all_ok) {
+      global.textSet("#err", "Please make sure all fields are filled.");
+      return;
+    }
+
+    var json = {
+      "email": $("#email").val(),
+    };
+
+    global.buttonDisable("#reset-button");
+    global.post(global.commento_origin + "/api/owner/send-reset-hex", json, function(resp) {
+      global.buttonEnable("#reset-button");
+
+      global.textSet("#err", "");
+      if (!resp.success) {
+        global.textSet("#err", resp.message);
+        return
+      }
+
+      $("#msg").html("If that email is a registered account, you will receive an email with instructions on how to reset your password.");
+      $("#reset-button").hide();
+    });
+  }
+
+} (window, document));