feat: expose some casbin APIs (#955)

* feat: expose some casbin APIs

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

* feat: add BatchEnforce API

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

* fix: solve requested changes

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

controllers/enforcer.go

@@ -0,0 +1,88 @@
+// Copyright 2022 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 controllers
+
+import (
+	"encoding/json"
+
+	"github.com/casdoor/casdoor/object"
+)
+
+func (c *ApiController) Enforce() {
+	userId := c.GetSessionUsername()
+	if userId == "" {
+		c.ResponseError("Please sign in first")
+		return
+	}
+
+	var permissionRule object.PermissionRule
+	err := json.Unmarshal(c.Ctx.Input.RequestBody, &permissionRule)
+	if err != nil {
+		panic(err)
+	}
+
+	c.Data["json"] = object.Enforce(userId, &permissionRule)
+	c.ServeJSON()
+}
+
+func (c *ApiController) BatchEnforce() {
+	userId := c.GetSessionUsername()
+	if userId == "" {
+		c.ResponseError("Please sign in first")
+		return
+	}
+
+	var permissionRules []object.PermissionRule
+	err := json.Unmarshal(c.Ctx.Input.RequestBody, &permissionRules)
+	if err != nil {
+		panic(err)
+	}
+
+	c.Data["json"] = object.BatchEnforce(userId, permissionRules)
+	c.ServeJSON()
+}
+
+func (c *ApiController) GetAllObjects() {
+	userId := c.GetSessionUsername()
+	if userId == "" {
+		c.ResponseError("Please sign in first")
+		return
+	}
+
+	c.Data["json"] = object.GetAllObjects(userId)
+	c.ServeJSON()
+}
+
+func (c *ApiController) GetAllActions() {
+	userId := c.GetSessionUsername()
+	if userId == "" {
+		c.ResponseError("Please sign in first")
+		return
+	}
+
+	c.Data["json"] = object.GetAllActions(userId)
+	c.ServeJSON()
+}
+
+func (c *ApiController) GetAllRoles() {
+	userId := c.GetSessionUsername()
+	if userId == "" {
+		c.ResponseError("Please sign in first")
+		return
+	}
+
+	c.Data["json"] = object.GetAllRoles(userId)
+	c.ServeJSON()
+}

object/permission.go

@@ -45,13 +45,13 @@ type Permission struct {
 }
 
 type PermissionRule struct {
-	PType string `xorm:"varchar(100) index not null default ''"`
-	V0    string `xorm:"varchar(100) index not null default ''"`
-	V1    string `xorm:"varchar(100) index not null default ''"`
-	V2    string `xorm:"varchar(100) index not null default ''"`
-	V3    string `xorm:"varchar(100) index not null default ''"`
-	V4    string `xorm:"varchar(100) index not null default ''"`
-	V5    string `xorm:"varchar(100) index not null default ''"`
+	Ptype string `xorm:"varchar(100) index not null default ''" json:"ptype"`
+	V0    string `xorm:"varchar(100) index not null default ''" json:"v0"`
+	V1    string `xorm:"varchar(100) index not null default ''" json:"v1"`
+	V2    string `xorm:"varchar(100) index not null default ''" json:"v2"`
+	V3    string `xorm:"varchar(100) index not null default ''" json:"v3"`
+	V4    string `xorm:"varchar(100) index not null default ''" json:"v4"`
+	V5    string `xorm:"varchar(100) index not null default ''" json:"v5"`
 }
 
 func GetPermissionCount(owner, field, value string) int {
@@ -208,6 +208,13 @@ func getPolicies(permission *Permission) [][]string {
 			}
 		}
 	}
+	for _, role := range permission.Roles {
+		for _, resource := range permission.Resources {
+			for _, action := range permission.Actions {
+				policies = append(policies, []string{permission.GetId(), role, resource, strings.ToLower(action)})
+			}
+		}
+	}
 	return policies
 }
 
@@ -239,3 +246,62 @@ func GetPermissionsByUser(userId string) []*Permission {
 
 	return permissions
 }
+
+func Enforce(userId string, permissionRule *PermissionRule) bool {
+	permission := GetPermission(permissionRule.V0)
+	enforcer := getEnforcer(permission)
+	allow, err := enforcer.Enforce(userId, permissionRule.V2, permissionRule.V3)
+	if err != nil {
+		panic(err)
+	}
+	return allow
+}
+
+func BatchEnforce(userId string, permissionRules []PermissionRule) []bool {
+	var requests [][]interface{}
+	for _, permissionRule := range permissionRules {
+		requests = append(requests, []interface{}{userId, permissionRule.V2, permissionRule.V3})
+	}
+	permission := GetPermission(permissionRules[0].V0)
+	enforcer := getEnforcer(permission)
+	allow, err := enforcer.BatchEnforce(requests)
+	if err != nil {
+		panic(err)
+	}
+	return allow
+}
+
+func getAllValues(userId string, sec string, fieldIndex int) []string {
+	permissions := GetPermissionsByUser(userId)
+	var values []string
+	for _, permission := range permissions {
+		enforcer := getEnforcer(permission)
+		enforcer.ClearPolicy()
+		err := enforcer.LoadFilteredPolicy(xormadapter.Filter{V0: []string{permission.GetId()}, V1: []string{userId}})
+		if err != nil {
+			return nil
+		}
+
+		for _, value := range enforcer.GetModel().GetValuesForFieldInPolicyAllTypes(sec, fieldIndex) {
+			values = append(values, value)
+		}
+	}
+	return values
+}
+
+func GetAllObjects(userId string) []string {
+	return getAllValues(userId, "p", 2)
+}
+
+func GetAllActions(userId string) []string {
+	return getAllValues(userId, "p", 3)
+}
+
+func GetAllRoles(userId string) []string {
+	roles := GetRolesByUser(userId)
+	var res []string
+	for _, role := range roles {
+		res = append(res, role.Name)
+	}
+	return res
+}

routers/router.go

@@ -83,6 +83,12 @@ func initAPI() {
 	beego.Router("/api/add-permission", &controllers.ApiController{}, "POST:AddPermission")
 	beego.Router("/api/delete-permission", &controllers.ApiController{}, "POST:DeletePermission")
 
+	beego.Router("/api/enforce", &controllers.ApiController{}, "POST:Enforce")
+	beego.Router("/api/batch-enforce", &controllers.ApiController{}, "POST:BatchEnforce")
+	beego.Router("/api/get-all-objects", &controllers.ApiController{}, "GET:GetAllObjects")
+	beego.Router("/api/get-all-actions", &controllers.ApiController{}, "GET:GetAllActions")
+	beego.Router("/api/get-all-roles", &controllers.ApiController{}, "GET:GetAllRoles")
+
 	beego.Router("/api/get-models", &controllers.ApiController{}, "GET:GetModels")
 	beego.Router("/api/get-model", &controllers.ApiController{}, "GET:GetModel")
 	beego.Router("/api/update-model", &controllers.ApiController{}, "POST:UpdateModel")