Implement GET /users endpoint for APIv4 (#5277)

api4/user.go

@@ -16,6 +16,7 @@ func InitUser() {
 	l4g.Debug(utils.T("api.user.init.debug"))
 
 	BaseRoutes.Users.Handle("", ApiHandler(createUser)).Methods("POST")
+	BaseRoutes.Users.Handle("", ApiSessionRequired(getUsers)).Methods("GET")
 	BaseRoutes.Users.Handle("/ids", ApiSessionRequired(getUsersByIds)).Methods("POST")
 
 	BaseRoutes.User.Handle("", ApiSessionRequired(getUser)).Methods("GET")
@@ -86,6 +87,67 @@ func getUser(c *Context, w http.ResponseWriter, r *http.Request) {
 	}
 }
 
+func getUsers(c *Context, w http.ResponseWriter, r *http.Request) {
+	inTeamId := r.URL.Query().Get("in_team")
+	inChannelId := r.URL.Query().Get("in_channel")
+	notInChannelId := r.URL.Query().Get("not_in_channel")
+
+	if len(notInChannelId) > 0 && len(inTeamId) == 0 {
+		c.SetInvalidParam("team_id")
+		return
+	}
+
+	var profiles []*model.User
+	var err *model.AppError
+	etag := ""
+
+	if len(notInChannelId) > 0 {
+		if !app.SessionHasPermissionToChannel(c.Session, notInChannelId, model.PERMISSION_READ_CHANNEL) {
+			c.SetPermissionError(model.PERMISSION_READ_CHANNEL)
+			return
+		}
+
+		profiles, err = app.GetUsersNotInChannelPage(inTeamId, notInChannelId, c.Params.Page, c.Params.PerPage, c.IsSystemAdmin())
+	} else if len(inTeamId) > 0 {
+		if !app.SessionHasPermissionToTeam(c.Session, inTeamId, model.PERMISSION_VIEW_TEAM) {
+			c.SetPermissionError(model.PERMISSION_VIEW_TEAM)
+			return
+		}
+
+		etag = app.GetUsersInTeamEtag(inTeamId)
+		if HandleEtag(etag, "Get Users in Team", w, r) {
+			return
+		}
+
+		profiles, err = app.GetUsersInTeamPage(inTeamId, c.Params.Page, c.Params.PerPage, c.IsSystemAdmin())
+	} else if len(inChannelId) > 0 {
+		if !app.SessionHasPermissionToChannel(c.Session, inChannelId, model.PERMISSION_READ_CHANNEL) {
+			c.SetPermissionError(model.PERMISSION_READ_CHANNEL)
+			return
+		}
+
+		profiles, err = app.GetUsersInChannelPage(inChannelId, c.Params.Page, c.Params.PerPage, c.IsSystemAdmin())
+	} else {
+		// No permission check required
+
+		etag = app.GetUsersEtag()
+		if HandleEtag(etag, "Get Users", w, r) {
+			return
+		}
+		profiles, err = app.GetUsersPage(c.Params.Page, c.Params.PerPage, c.IsSystemAdmin())
+	}
+
+	if err != nil {
+		c.Err = err
+		return
+	} else {
+		if len(etag) > 0 {
+			w.Header().Set(model.HEADER_ETAG_SERVER, etag)
+		}
+		w.Write([]byte(model.UserListToJson(profiles)))
+	}
+}
+
 func getUsersByIds(c *Context, w http.ResponseWriter, r *http.Request) {
 	userIds := model.ArrayFromJson(r.Body)