// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you 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 casbin

import (
	"bytes"
	"encoding/json"
)

func CasbinJsGetPermissionForUser(e IEnforcer, user string) (string, error) {
	model := e.GetModel()
	m := map[string]interface{}{}

	m["m"] = model.ToText()

	pRules := [][]string{}
	for ptype := range model["p"] {
		policies, err := model.GetPolicy("p", ptype)
		if err != nil {
			return "", err
		}
		for _, rules := range policies {
			pRules = append(pRules, append([]string{ptype}, rules...))
		}
	}
	m["p"] = pRules

	gRules := [][]string{}
	for ptype := range model["g"] {
		policies, err := model.GetPolicy("g", ptype)
		if err != nil {
			return "", err
		}
		for _, rules := range policies {
			gRules = append(gRules, append([]string{ptype}, rules...))
		}
	}
	m["g"] = gRules

	result := bytes.NewBuffer([]byte{})
	encoder := json.NewEncoder(result)
	encoder.SetEscapeHTML(false)
	err := encoder.Encode(m)
	return result.String(), err
}