Add channel module wrapping our various JSON requests to the server.

(imported from commit 6489938678551ad8594822363ae6d1c9ae295496)

static/js/channel.js

@@ -0,0 +1,44 @@
+var channel = (function () {
+
+var exports = {};
+
+function call(args) {
+    return $.ajax(args);
+}
+
+exports.get = function (options) {
+    var args = _.extend({type: "GET", dataType: "json"}, options);
+    return call(args);
+};
+
+exports.post = function (options) {
+    var args = _.extend({type: "POST", dataType: "json"}, options);
+    return call(args);
+};
+
+exports.put = function (options) {
+    var args = _.extend({type: "PUT", dataType: "json"}, options);
+    return call(args);
+};
+
+// Not called exports.delete because delete is a reserved word in JS
+exports.del = function (options) {
+    var args = _.extend({type: "DELETE", dataType: "json"}, options);
+    return call(args);
+};
+
+exports.patch = function (options) {
+    // Send a PATCH as a POST in order to work around QtWebkit
+    // (Linux/Windows desktop app) not supporting PATCH body.
+    options.method = "PATCH";
+    if (options.processData === false) {
+        // If we're submitting a FormData object, we need to add the
+        // method this way
+        options.data.append("method", "PATCH");
+    }
+    return exports.post(options);
+};
+
+return exports;
+
+}());