Adding ability to fetch posts around a specifc post

model/client.go

@@ -618,6 +618,24 @@ func (c *Client) GetPostsSince(channelId string, time int64) (*Result, *AppError
 	}
 }
 
+func (c *Client) GetPostsBefore(channelId string, postid string, offset int, limit int, etag string) (*Result, *AppError) {
+	if r, err := c.DoApiGet(fmt.Sprintf("/channels/%v/post/%v/before/%v/%v", channelId, postid, offset, limit), "", etag); err != nil {
+		return nil, err
+	} else {
+		return &Result{r.Header.Get(HEADER_REQUEST_ID),
+			r.Header.Get(HEADER_ETAG_SERVER), PostListFromJson(r.Body)}, nil
+	}
+}
+
+func (c *Client) GetPostsAfter(channelId string, postid string, offset int, limit int, etag string) (*Result, *AppError) {
+	if r, err := c.DoApiGet(fmt.Sprintf("/channels/%v/post/%v/after/%v/%v", channelId, postid, offset, limit), "", etag); err != nil {
+		return nil, err
+	} else {
+		return &Result{r.Header.Get(HEADER_REQUEST_ID),
+			r.Header.Get(HEADER_ETAG_SERVER), PostListFromJson(r.Body)}, nil
+	}
+}
+
 func (c *Client) GetPost(channelId string, postId string, etag string) (*Result, *AppError) {
 	if r, err := c.DoApiGet(fmt.Sprintf("/channels/%v/post/%v", channelId, postId), "", etag); err != nil {
 		return nil, err