web/handler/read_one.go

89 lines
2.6 KiB
Go

// Copyright (c) 2018 Vikunja and contributors.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package handler
import (
"fmt"
"github.com/labstack/echo/v4"
"net/http"
"strconv"
)
// ReadOneWeb is the webhandler to get one object
func (c *WebHandler) ReadOneWeb(ctx echo.Context) error {
// Get our model
currentStruct := c.EmptyStruct()
// Get the object & bind params to struct
if err := ctx.Bind(currentStruct); err != nil {
config.LoggingProvider.Debugf("Invalid model error. Internal error was: %s", err.Error())
if he, is := err.(*echo.HTTPError); is {
return echo.NewHTTPError(http.StatusBadRequest, fmt.Sprintf("Invalid model provided. Error was: %s", he.Message))
}
return echo.NewHTTPError(http.StatusBadRequest, fmt.Sprintf("Invalid model provided."))
}
// Check rights
currentAuth, err := config.AuthProvider.AuthObject(ctx)
if err != nil {
return echo.NewHTTPError(http.StatusInternalServerError, "Could not determine the current user.")
}
// Create the db session
s := config.SessionFactory()
defer func() {
err = s.Close()
if err != nil {
config.LoggingProvider.Errorf("Could not close session: %s", err)
}
}()
canRead, maxRight, err := currentStruct.CanRead(s, currentAuth)
if err != nil {
_ = s.Rollback()
return HandleHTTPError(err, ctx)
}
if !canRead {
_ = s.Rollback()
config.LoggingProvider.Noticef("Tried to read while not having the rights for it (User: %v)", currentAuth)
return echo.NewHTTPError(http.StatusForbidden, "You don't have the right to see this")
}
// Get our object
err = currentStruct.ReadOne(s, currentAuth)
if err != nil {
_ = s.Rollback()
return HandleHTTPError(err, ctx)
}
// Set the headers
if canRead {
ctx.Response().Header().Set("x-max-right", strconv.FormatInt(int64(maxRight), 10))
ctx.Response().Header().Set("Access-Control-Expose-Headers", "x-max-right")
}
err = s.Commit()
if err != nil {
return HandleHTTPError(err, ctx)
}
err = ctx.JSON(http.StatusOK, currentStruct)
if err != nil {
return HandleHTTPError(err, ctx)
}
return err
}