added getChannel api service and use that over getChannels where appropriate on client

web/react/utils/async_client.jsx

@@ -81,6 +81,30 @@ module.exports.getChannels = function(force, updateLastViewed, checkVersion) {
     }
 }
 
+module.exports.getChannel = function(id) {
+    if (isCallInProgress("getChannel"+id)) return;
+
+        callTracker["getChannel"+id] = utils.getTimestamp();
+        client.getChannel(id,
+            function(data, textStatus, xhr) {
+                callTracker["getChannel"+id] = 0;
+
+                if (xhr.status === 304 || !data) return;
+
+                AppDispatcher.handleServerAction({
+                    type: ActionTypes.RECIEVED_CHANNEL,
+                    channel: data.channel,
+                    member: data.member
+                });
+
+            },
+            function(err) {
+                callTracker["getChannel"+id] = 0;
+                dispatchError(err, "getChannel");
+            }
+        );
+}
+
 module.exports.updateLastViewedAt = function() {
     if (isCallInProgress("updateLastViewed")) return;
 

web/react/utils/client.jsx

@@ -554,6 +554,21 @@ module.exports.getChannels = function(success, error) {
     });
 };
 
+module.exports.getChannel = function(id, success, error) {
+    $.ajax({
+        url: "/api/v1/channels/" + id + "/",
+        dataType: 'json',
+        type: 'GET',
+        success: success,
+        error: function(xhr, status, err) {
+            e = handleError("getChannel", xhr, status, err);
+            error(e);
+        }
+    });
+
+    module.exports.track('api', 'api_channel_get');
+};
+
 module.exports.getMoreChannels = function(success, error) {
     $.ajax({
         url: "/api/v1/channels/more",

web/react/utils/constants.jsx

@@ -10,6 +10,7 @@ module.exports = {
     CLICK_CHANNEL: null,
     CREATE_CHANNEL: null,
     RECIEVED_CHANNELS: null,
+    RECIEVED_CHANNEL: null,
     RECIEVED_MORE_CHANNELS: null,
     RECIEVED_CHANNEL_EXTRA_INFO: null,