casibase/controllers/util.go

// Copyright 2023 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package controllers

import "github.com/astaxie/beego/context"

type Response struct {
	Status string      `json:"status"`
	Msg    string      `json:"msg"`
	Data   interface{} `json:"data"`
	Data2  interface{} `json:"data2"`
}

func (c *ApiController) ResponseOk(data ...interface{}) {
	resp := Response{Status: "ok"}
	switch len(data) {
	case 2:
		resp.Data2 = data[1]
		fallthrough
	case 1:
		resp.Data = data[0]
	}
	c.Data["json"] = resp
	c.ServeJSON()
}

func (c *ApiController) ResponseError(error string, data ...interface{}) {
	resp := Response{Status: "error", Msg: error}
	switch len(data) {
	case 2:
		resp.Data2 = data[1]
		fallthrough
	case 1:
		resp.Data = data[0]
	}
	c.Data["json"] = resp
	c.ServeJSON()
}

func (c *ApiController) RequireSignedIn() (string, bool) {
	userId := c.GetSessionUsername()
	if userId == "" {
		c.ResponseError("Please sign in first")
		return "", false
	}
	return userId, true
}

func (c *ApiController) RequireAdmin() bool {
	user := c.GetSessionUser()
	if user == nil || !user.IsAdmin {
		c.ResponseError("this operation requires admin privilege")
		return true
	}

	return false
}

func DenyRequest(ctx *context.Context) {
	responseError(ctx, "Unauthorized operation")
}

func responseError(ctx *context.Context, error string, data ...interface{}) {
	resp := Response{Status: "error", Msg: error}
	switch len(data) {
	case 2:
		resp.Data2 = data[1]
		fallthrough
	case 1:
		resp.Data = data[0]
	}

	err := ctx.Output.JSON(resp, true, false)
	if err != nil {
		panic(err)
	}
}