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

api/channel.go

@@ -23,6 +23,7 @@ func InitChannel(r *mux.Router) {
 	sr.Handle("/update", ApiUserRequired(updateChannel)).Methods("POST")
 	sr.Handle("/update_desc", ApiUserRequired(updateChannelDesc)).Methods("POST")
 	sr.Handle("/update_notify_level", ApiUserRequired(updateNotifyLevel)).Methods("POST")
+	sr.Handle("/{id:[A-Za-z0-9]+}/", ApiUserRequired(getChannel)).Methods("GET")
 	sr.Handle("/{id:[A-Za-z0-9]+}/extra_info", ApiUserRequired(getChannelExtraInfo)).Methods("GET")
 	sr.Handle("/{id:[A-Za-z0-9]+}/join", ApiUserRequired(joinChannel)).Methods("POST")
 	sr.Handle("/{id:[A-Za-z0-9]+}/leave", ApiUserRequired(leaveChannel)).Methods("POST")
@@ -275,7 +276,7 @@ func updateChannelDesc(c *Context, w http.ResponseWriter, r *http.Request) {
 
 func getChannels(c *Context, w http.ResponseWriter, r *http.Request) {
 
-	// user is already in the newtork
+	// user is already in the team
 
 	if result := <-Srv.Store.Channel().GetChannels(c.Session.TeamId, c.Session.UserId); result.Err != nil {
 		if result.Err.Message == "No channels were found" {
@@ -300,7 +301,7 @@ func getChannels(c *Context, w http.ResponseWriter, r *http.Request) {
 
 func getMoreChannels(c *Context, w http.ResponseWriter, r *http.Request) {
 
-	// user is already in the newtork
+	// user is already in the team
 
 	if result := <-Srv.Store.Channel().GetMoreChannels(c.Session.TeamId, c.Session.UserId); result.Err != nil {
 		c.Err = result.Err
@@ -548,6 +549,37 @@ func updateLastViewedAt(c *Context, w http.ResponseWriter, r *http.Request) {
 	w.Write([]byte(model.MapToJson(result)))
 }
 
+func getChannel(c *Context, w http.ResponseWriter, r *http.Request) {
+	params := mux.Vars(r)
+	id := params["id"]
+
+	//pchan := Srv.Store.Channel().CheckPermissionsTo(c.Session.TeamId, id, c.Session.UserId)
+	cchan := Srv.Store.Channel().Get(id)
+	cmchan := Srv.Store.Channel().GetMember(id, c.Session.UserId)
+
+	if cresult := <-cchan; cresult.Err != nil {
+		c.Err = cresult.Err
+		return
+	} else if cmresult := <-cmchan; cmresult.Err != nil {
+		c.Err = cmresult.Err
+		return
+	} else {
+		data := &model.ChannelData{}
+		data.Channel = cresult.Data.(*model.Channel)
+		member := cmresult.Data.(model.ChannelMember)
+		data.Member = &member
+
+		if HandleEtag(data.Etag(), w, r) {
+			return
+		} else {
+			w.Header().Set(model.HEADER_ETAG_SERVER, data.Etag())
+			w.Header().Set("Expires", "-1")
+			w.Write([]byte(data.ToJson()))
+		}
+	}
+
+}
+
 func getChannelExtraInfo(c *Context, w http.ResponseWriter, r *http.Request) {
 
 	params := mux.Vars(r)

api/channel_test.go

@@ -320,6 +320,27 @@ func TestGetChannel(t *testing.T) {
 	if _, err := Client.UpdateLastViewedAt(channel2.Id); err != nil {
 		t.Fatal(err)
 	}
+
+	if resp, err := Client.GetChannel(channel1.Id, ""); err != nil {
+		t.Fatal(err)
+	} else {
+		data := resp.Data.(*model.ChannelData)
+		if data.Channel.DisplayName != channel1.DisplayName {
+			t.Fatal("name didn't match")
+		}
+
+		// test etag caching
+		if cache_result, err := Client.GetChannel(channel1.Id, resp.Etag); err != nil {
+			t.Fatal(err)
+		} else if cache_result.Data.(*model.ChannelData) != nil {
+			t.Log(cache_result.Data)
+			t.Fatal("cache should be empty")
+		}
+	}
+
+	if _, err := Client.GetChannel("junk", ""); err == nil {
+		t.Fatal("should have failed - bad channel id")
+	}
 }
 
 func TestGetMoreChannel(t *testing.T) {

model/channel_data.go

@@ -0,0 +1,43 @@
+// Copyright (c) 2015 Spinpunch, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+package model
+
+import (
+	"encoding/json"
+	"io"
+)
+
+type ChannelData struct {
+	Channel *Channel       `json:"channel"`
+	Member  *ChannelMember `json:"member"`
+}
+
+func (o *ChannelData) Etag() string {
+	var mt int64 = 0
+	if o.Member != nil {
+		mt = o.Member.LastUpdateAt
+	}
+
+	return Etag(o.Channel.Id, o.Channel.UpdateAt, o.Channel.LastPostAt, mt)
+}
+
+func (o *ChannelData) ToJson() string {
+	b, err := json.Marshal(o)
+	if err != nil {
+		return ""
+	} else {
+		return string(b)
+	}
+}
+
+func ChannelDataFromJson(data io.Reader) *ChannelData {
+	decoder := json.NewDecoder(data)
+	var o ChannelData
+	err := decoder.Decode(&o)
+	if err == nil {
+		return &o
+	} else {
+		return nil
+	}
+}

model/client.go

@@ -390,6 +390,15 @@ func (c *Client) GetChannels(etag string) (*Result, *AppError) {
 	}
 }
 
+func (c *Client) GetChannel(id, etag string) (*Result, *AppError) {
+	if r, err := c.DoGet("/channels/"+id+"/", "", etag); err != nil {
+		return nil, err
+	} else {
+		return &Result{r.Header.Get(HEADER_REQUEST_ID),
+			r.Header.Get(HEADER_ETAG_SERVER), ChannelDataFromJson(r.Body)}, nil
+	}
+}
+
 func (c *Client) GetMoreChannels(etag string) (*Result, *AppError) {
 	if r, err := c.DoGet("/channels/more", "", etag); err != nil {
 		return nil, err

web/react/components/edit_channel_modal.jsx

@@ -14,7 +14,7 @@ module.exports = React.createClass({
         Client.updateChannelDesc(data,
             function(data) {
                 this.setState({ server_error: "" });
-                AsyncClient.getChannels(true);
+                AsyncClient.getChannel(this.state.channel_id);
                 $(this.refs.modal.getDOMNode()).modal('hide');
             }.bind(this),
             function(err) {

web/react/components/sidebar.jsx

@@ -157,9 +157,9 @@ module.exports = React.createClass({
     onSocketChange: function(msg) {
         if (msg.action === 'posted') {
             if (ChannelStore.getCurrentId() === msg.channel_id) {
-                AsyncClient.getChannels(true, window.isActive);
+                if (window.isActive) AsyncClient.updateLastViewedAt();
             } else {
-                AsyncClient.getChannels(true);
+                AsyncClient.getChannel(msg.channel_id);
             }
 
             if (UserStore.getCurrentId() !== msg.user_id) {
@@ -213,13 +213,13 @@ module.exports = React.createClass({
                     utils.ding();
                 }
             }
-        } else if (msg.action === 'viewed') {
-            if (ChannelStore.getCurrentId() != msg.channel_id) {
-                AsyncClient.getChannels(true);
+        } else if (msg.action === "viewed") {
+            if (ChannelStore.getCurrentId() !== msg.channel_id && UserStore.getCurrentId() === msg.user_id) {
+                AsyncClient.getChannel(msg.channel_id);
             }
         } else if (msg.action === 'user_added') {
             if (UserStore.getCurrentId() === msg.user_id) {
-                AsyncClient.getChannels(true);
+                AsyncClient.getChannel(msg.channel_id);
             }
         } else if (msg.action === 'user_removed') {
             if (msg.user_id === UserStore.getCurrentId()) {

web/react/stores/channel_store.jsx

@@ -146,12 +146,39 @@ var ChannelStore = assign({}, EventEmitter.prototype, {
 
     return extra;
   },
+  _storeChannel: function(channel) {
+    var channels = this._getChannels();
+    var found;
+
+    for (var i = 0; i < channels.length; i++) {
+      if (channels[i].id == channel.id) {
+        channels[i] = channel;
+        found = true;
+        break;
+      }
+    }
+
+    if (!found) {
+        channels.push(channel);
+        channels.sort(function(a,b) {
+          if (a.display_name < b.display_name) return -1;
+          if (a.display_name > b.display_name) return 1;
+          return 0;
+        });
+    }
+    this._storeChannels(channels);
+  },
   _storeChannels: function(channels) {
     BrowserStore.setItem("channels", channels);
   },
   _getChannels: function() {
     return BrowserStore.getItem("channels", []);
   },
+  _storeChannelMember: function(channelMember) {
+    var members = this._getChannelMembers();
+    members[channelMember.channel_id] = channelMember;
+    this._storeChannelMembers(members);
+  },
   _storeChannelMembers: function(channelMembers) {
     BrowserStore.setItem("channel_members", channelMembers);
   },
@@ -202,6 +229,14 @@ ChannelStore.dispatchToken = AppDispatcher.register(function(payload) {
       ChannelStore.emitChange();
       break;
 
+    case ActionTypes.RECIEVED_CHANNEL:
+      ChannelStore._storeChannel(action.channel);
+      ChannelStore._storeChannelMember(action.member);
+      var currentId = ChannelStore.getCurrentId();
+      if (currentId) ChannelStore.resetCounts(currentId);
+      ChannelStore.emitChange();
+      break;
+
     case ActionTypes.RECIEVED_MORE_CHANNELS:
       ChannelStore._storeMoreChannels(action.channels);
       ChannelStore.emitMoreChange();
@@ -218,4 +253,4 @@ ChannelStore.dispatchToken = AppDispatcher.register(function(payload) {
   }
 });
 
-module.exports = ChannelStore;
+module.exports = ChannelStore;

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,