PLT-4403 Add server-based channel autocomplete, search and paging (#4585)

* Add more channel paging API

* Add channel paging support to client

* Add DB channel search functions

* Add API for searching more channels

* Add more channel search functionality to client

* Add API for autocompleting channels

* Add channel autocomplete functionality to the client

* Move to be deprecated APIs to their own file

* Final clean-up

* Fixes related to feedback

* Localization changes

* Add unit as suffix to timeout constants

api/channel.go

@@ -6,6 +6,7 @@ package api
 import (
 	"fmt"
 	"net/http"
+	"strconv"
 	"strings"
 
 	l4g "github.com/alecthomas/log4go"
@@ -19,7 +20,8 @@ func InitChannel() {
 	l4g.Debug(utils.T("api.channel.init.debug"))
 
 	BaseRoutes.Channels.Handle("/", ApiUserRequired(getChannels)).Methods("GET")
-	BaseRoutes.Channels.Handle("/more", ApiUserRequired(getMoreChannels)).Methods("GET")
+	BaseRoutes.Channels.Handle("/more/{offset:[0-9]+}/{limit:[0-9]+}", ApiUserRequired(getMoreChannelsPage)).Methods("GET")
+	BaseRoutes.Channels.Handle("/more/search", ApiUserRequired(searchMoreChannels)).Methods("POST")
 	BaseRoutes.Channels.Handle("/counts", ApiUserRequired(getChannelCounts)).Methods("GET")
 	BaseRoutes.Channels.Handle("/members", ApiUserRequired(getMyChannelMembers)).Methods("GET")
 	BaseRoutes.Channels.Handle("/create", ApiUserRequired(createChannel)).Methods("POST")
@@ -28,6 +30,7 @@ func InitChannel() {
 	BaseRoutes.Channels.Handle("/update_header", ApiUserRequired(updateChannelHeader)).Methods("POST")
 	BaseRoutes.Channels.Handle("/update_purpose", ApiUserRequired(updateChannelPurpose)).Methods("POST")
 	BaseRoutes.Channels.Handle("/update_notify_props", ApiUserRequired(updateNotifyProps)).Methods("POST")
+	BaseRoutes.Channels.Handle("/autocomplete", ApiUserRequired(autocompleteChannels)).Methods("GET")
 
 	BaseRoutes.NeedChannelName.Handle("/join", ApiUserRequired(join)).Methods("POST")
 
@@ -41,6 +44,7 @@ func InitChannel() {
 	BaseRoutes.NeedChannel.Handle("/remove", ApiUserRequired(removeMember)).Methods("POST")
 	BaseRoutes.NeedChannel.Handle("/update_last_viewed_at", ApiUserRequired(updateLastViewedAt)).Methods("POST")
 	BaseRoutes.NeedChannel.Handle("/set_last_viewed_at", ApiUserRequired(setLastViewedAt)).Methods("POST")
+
 }
 
 func createChannel(c *Context, w http.ResponseWriter, r *http.Request) {
@@ -416,18 +420,29 @@ func getChannels(c *Context, w http.ResponseWriter, r *http.Request) {
 	}
 }
 
-func getMoreChannels(c *Context, w http.ResponseWriter, r *http.Request) {
+func getMoreChannelsPage(c *Context, w http.ResponseWriter, r *http.Request) {
+	params := mux.Vars(r)
+
+	offset, err := strconv.Atoi(params["offset"])
+	if err != nil {
+		c.SetInvalidParam("getProfiles", "offset")
+		return
+	}
+
+	limit, err := strconv.Atoi(params["limit"])
+	if err != nil {
+		c.SetInvalidParam("getProfiles", "limit")
+		return
+	}
 
 	// user is already in the team
 	if !HasPermissionToTeamContext(c, c.TeamId, model.PERMISSION_LIST_TEAM_CHANNELS) {
 		return
 	}
 
-	if result := <-Srv.Store.Channel().GetMoreChannels(c.TeamId, c.Session.UserId); result.Err != nil {
+	if result := <-Srv.Store.Channel().GetMoreChannels(c.TeamId, c.Session.UserId, offset, limit); result.Err != nil {
 		c.Err = result.Err
 		return
-	} else if HandleEtag(result.Data.(*model.ChannelList).Etag(), w, r) {
-		return
 	} else {
 		data := result.Data.(*model.ChannelList)
 		w.Header().Set(model.HEADER_ETAG_SERVER, data.Etag())
@@ -1182,3 +1197,51 @@ func updateNotifyProps(c *Context, w http.ResponseWriter, r *http.Request) {
 	}
 
 }
+
+func searchMoreChannels(c *Context, w http.ResponseWriter, r *http.Request) {
+	props := model.ChannelSearchFromJson(r.Body)
+	if props == nil {
+		c.SetInvalidParam("searchMoreChannels", "")
+		return
+	}
+
+	if c.Session.GetTeamByTeamId(c.TeamId) == nil {
+		if !HasPermissionToContext(c, model.PERMISSION_MANAGE_SYSTEM) {
+			return
+		}
+	}
+
+	if len(props.Term) == 0 {
+		c.SetInvalidParam("searchMoreChannels", "term")
+		return
+	}
+
+	if result := <-Srv.Store.Channel().SearchMore(c.Session.UserId, c.TeamId, props.Term); result.Err != nil {
+		c.Err = result.Err
+		return
+	} else {
+		channels := result.Data.(*model.ChannelList)
+		w.Write([]byte(channels.ToJson()))
+	}
+}
+
+func autocompleteChannels(c *Context, w http.ResponseWriter, r *http.Request) {
+	term := r.URL.Query().Get("term")
+
+	if c.Session.GetTeamByTeamId(c.TeamId) == nil {
+		if !HasPermissionToContext(c, model.PERMISSION_MANAGE_SYSTEM) {
+			return
+		}
+	}
+
+	var channels *model.ChannelList
+
+	if result := <-Srv.Store.Channel().SearchInTeam(c.TeamId, term); result.Err != nil {
+		c.Err = result.Err
+		return
+	} else {
+		channels = result.Data.(*model.ChannelList)
+	}
+
+	w.Write([]byte(channels.ToJson()))
+}