js code rewrite. Created _helpers.js with XHR and storage wrapper

1 files changed, 20 insertions, 72 deletions

diff --git a/assets/js/subscribe_widget.js b/assets/js/subscribe_widget.js
index 45ff5706..7665a00b 100644
--- a/assets/js/subscribe_widget.js
+++ b/assets/js/subscribe_widget.js
@@ -1,8 +1,9 @@
 'use strict';
 var subscribe_data = JSON.parse(document.getElementById('subscribe_data').textContent);
+var payload = 'csrf_token=' + subscribe_data.csrf_token;
 
 var subscribe_button = document.getElementById('subscribe');
-subscribe_button.parentNode['action'] = 'javascript:void(0)';
+subscribe_button.parentNode.action = 'javascript:void(0)';
 
 if (subscribe_button.getAttribute('data-type') === 'subscribe') {
     subscribe_button.onclick = subscribe;
@@ -10,87 +11,34 @@ if (subscribe_button.getAttribute('data-type') === 'subscribe') {
     subscribe_button.onclick = unsubscribe;
 }
 
-function subscribe(retries) {
-    if (retries === undefined) retries = 5;
-
-    if (retries <= 0) {
-        console.warn('Failed to subscribe.');
-        return;
-    }
-
-    var url = '/subscription_ajax?action_create_subscription_to_channel=1&redirect=false' +
-        '&c=' + subscribe_data.ucid;
-    var xhr = new XMLHttpRequest();
-    xhr.responseType = 'json';
-    xhr.timeout = 10000;
-    xhr.open('POST', url, true);
-    xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
-
+function subscribe() {
     var fallback = subscribe_button.innerHTML;
     subscribe_button.onclick = unsubscribe;
     subscribe_button.innerHTML = '<b>' + subscribe_data.unsubscribe_text + ' | ' + subscribe_data.sub_count_text + '</b>';
 
-    xhr.onreadystatechange = function () {
-        if (xhr.readyState === 4) {
-            if (xhr.status !== 200) {
-                subscribe_button.onclick = subscribe;
-                subscribe_button.innerHTML = fallback;
-            }
-        }
-    };
-
-    xhr.onerror = function () {
-        console.warn('Subscribing failed... ' + retries + '/5');
-        setTimeout(function () { subscribe(retries - 1); }, 1000);
-    };
-
-    xhr.ontimeout = function () {
-        console.warn('Subscribing failed... ' + retries + '/5');
-        subscribe(retries - 1);
-    };
+    var url = '/subscription_ajax?action_create_subscription_to_channel=1&redirect=false' +
+        '&c=' + subscribe_data.ucid;
 
-    xhr.send('csrf_token=' + subscribe_data.csrf_token);
+    helpers.xhr('POST', url, {payload: payload, retries: 5, entity_name: 'subscribe request'}, {
+        onNon200: function (xhr) {
+            subscribe_button.onclick = subscribe;
+            subscribe_button.innerHTML = fallback;
+        }
+    });
 }
 
-function unsubscribe(retries) {
-    if (retries === undefined)
-        retries = 5;
-
-    if (retries <= 0) {
-        console.warn('Failed to subscribe');
-        return;
-    }
-
-    var url = '/subscription_ajax?action_remove_subscriptions=1&redirect=false' +
-        '&c=' + subscribe_data.ucid;
-    var xhr = new XMLHttpRequest();
-    xhr.responseType = 'json';
-    xhr.timeout = 10000;
-    xhr.open('POST', url, true);
-    xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
-
+function unsubscribe() {
     var fallback = subscribe_button.innerHTML;
     subscribe_button.onclick = subscribe;
     subscribe_button.innerHTML = '<b>' + subscribe_data.subscribe_text + ' | ' + subscribe_data.sub_count_text + '</b>';
 
-    xhr.onreadystatechange = function () {
-        if (xhr.readyState === 4) {
-            if (xhr.status !== 200) {
-                subscribe_button.onclick = unsubscribe;
-                subscribe_button.innerHTML = fallback;
-            }
-        }
-    };
-
-    xhr.onerror = function () {
-        console.warn('Unsubscribing failed... ' + retries + '/5');
-        setTimeout(function () { unsubscribe(retries - 1); }, 1000);
-    };
-
-    xhr.ontimeout = function () {
-        console.warn('Unsubscribing failed... ' + retries + '/5');
-        unsubscribe(retries - 1);
-    };
+    var url = '/subscription_ajax?action_remove_subscriptions=1&redirect=false' +
+        '&c=' + subscribe_data.ucid;
 
-    xhr.send('csrf_token=' + subscribe_data.csrf_token);
+    helpers.xhr('POST', url, {payload: payload, retries: 5, entity_name: 'unsubscribe request'}, {
+        onNon200: function (xhr) {
+            subscribe_button.onclick = unsubscribe;
+            subscribe_button.innerHTML = fallback;
+        }
+    });
 }