feat: add model page (#757)

* feat: add model page

Signed-off-by: Yixiang Zhao <seriouszyx@foxmail.com>

* feat: support config model for permission

Signed-off-by: Yixiang Zhao <seriouszyx@foxmail.com>

* translation and indentation

Signed-off-by: Yixiang Zhao <seriouszyx@foxmail.com>

object/model.go

@@ -0,0 +1,122 @@
+// Copyright 2021 The Casdoor 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 object
+
+import (
+	"fmt"
+
+	"github.com/casdoor/casdoor/util"
+	"xorm.io/core"
+)
+
+type Model struct {
+	Owner       string `xorm:"varchar(100) notnull pk" json:"owner"`
+	Name        string `xorm:"varchar(100) notnull pk" json:"name"`
+	CreatedTime string `xorm:"varchar(100)" json:"createdTime"`
+	DisplayName string `xorm:"varchar(100)" json:"displayName"`
+
+	ModelText 	string `xorm:"mediumtext" json:"modelText"`
+	IsEnabled 	bool   `json:"isEnabled"`
+}
+
+func GetModelCount(owner, field, value string) int {
+	session := GetSession(owner, -1, -1, field, value, "", "")
+	count, err := session.Count(&Model{})
+	if err != nil {
+		panic(err)
+	}
+
+	return int(count)
+}
+
+func GetModels(owner string) []*Model {
+	models := []*Model{}
+	err := adapter.Engine.Desc("created_time").Find(&models, &Model{Owner: owner})
+	if err != nil {
+		panic(err)
+	}
+
+	return models
+}
+
+func GetPaginationModels(owner string, offset, limit int, field, value, sortField, sortOrder string) []*Model {
+	models := []*Model{}
+	session := GetSession(owner, offset, limit, field, value, sortField, sortOrder)
+	err := session.Find(&models)
+	if err != nil {
+		panic(err)
+	}
+
+	return models
+}
+
+func getModel(owner string, name string) *Model {
+	if owner == "" || name == "" {
+		return nil
+	}
+
+	model := Model{Owner: owner, Name: name}
+	existed, err := adapter.Engine.Get(&model)
+	if err != nil {
+		panic(err)
+	}
+
+	if existed {
+		return &model
+	} else {
+		return nil
+	}
+}
+
+func GetModel(id string) *Model {
+	owner, name := util.GetOwnerAndNameFromId(id)
+	return getModel(owner, name)
+}
+
+func UpdateModel(id string, model *Model) bool {
+	owner, name := util.GetOwnerAndNameFromId(id)
+	if getModel(owner, name) == nil {
+		return false
+	}
+
+	affected, err := adapter.Engine.ID(core.PK{owner, name}).AllCols().Update(model)
+	if err != nil {
+		panic(err)
+	}
+
+	return affected != 0
+}
+
+func AddModel(model *Model) bool {
+	affected, err := adapter.Engine.Insert(model)
+	if err != nil {
+		panic(err)
+	}
+
+	return affected != 0
+}
+
+func DeleteModel(model *Model) bool {
+	affected, err := adapter.Engine.ID(core.PK{model.Owner, model.Name}).Delete(&Model{})
+	if err != nil {
+		panic(err)
+	}
+
+	return affected != 0
+}
+
+func (model *Model) GetId() string {
+	return fmt.Sprintf("%s/%s", model.Owner, model.Name)
+}