Rest API reorganization (#3624)

* reorg API

* reorg api

* fix system route

* remove newline

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

server/api/templates.go

@@ -0,0 +1,90 @@
+package api
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"github.com/gorilla/mux"
+	"github.com/mattermost/focalboard/server/model"
+	"github.com/mattermost/focalboard/server/services/audit"
+
+	"github.com/mattermost/mattermost-server/v6/shared/mlog"
+)
+
+func (a *API) registerTemplatesRoutes(r *mux.Router) {
+	r.HandleFunc("/teams/{teamID}/templates", a.sessionRequired(a.handleGetTemplates)).Methods("GET")
+}
+
+func (a *API) handleGetTemplates(w http.ResponseWriter, r *http.Request) {
+	// swagger:operation GET /teams/{teamID}/templates getTemplates
+	//
+	// Returns team templates
+	//
+	// ---
+	// produces:
+	// - application/json
+	// parameters:
+	// - name: teamID
+	//   in: path
+	//   description: Team ID
+	//   required: true
+	//   type: string
+	// security:
+	// - BearerAuth: []
+	// responses:
+	//   '200':
+	//     description: success
+	//     schema:
+	//       type: array
+	//       items:
+	//         "$ref": "#/definitions/Board"
+	//   default:
+	//     description: internal error
+	//     schema:
+	//       "$ref": "#/definitions/ErrorResponse"
+
+	teamID := mux.Vars(r)["teamID"]
+	userID := getUserID(r)
+
+	if teamID != model.GlobalTeamID && !a.permissions.HasPermissionToTeam(userID, teamID, model.PermissionViewTeam) {
+		a.errorResponse(w, r.URL.Path, http.StatusForbidden, "", PermissionError{"access denied to team"})
+		return
+	}
+
+	auditRec := a.makeAuditRecord(r, "getTemplates", audit.Fail)
+	defer a.audit.LogRecord(audit.LevelRead, auditRec)
+	auditRec.AddMeta("teamID", teamID)
+
+	// retrieve boards list
+	boards, err := a.app.GetTemplateBoards(teamID, userID)
+	if err != nil {
+		a.errorResponse(w, r.URL.Path, http.StatusInternalServerError, "", err)
+		return
+	}
+
+	results := []*model.Board{}
+	for _, board := range boards {
+		if board.Type == model.BoardTypeOpen {
+			results = append(results, board)
+		} else if a.permissions.HasPermissionToBoard(userID, board.ID, model.PermissionViewBoard) {
+			results = append(results, board)
+		}
+	}
+
+	a.logger.Debug("GetTemplates",
+		mlog.String("teamID", teamID),
+		mlog.Int("boardsCount", len(results)),
+	)
+
+	data, err := json.Marshal(results)
+	if err != nil {
+		a.errorResponse(w, r.URL.Path, http.StatusInternalServerError, "", err)
+		return
+	}
+
+	// response
+	jsonBytesResponse(w, http.StatusOK, data)
+
+	auditRec.AddMeta("templatesCount", len(results))
+	auditRec.Success()
+}