snapshot of https://github.com/casbin/casbin.git (master, 2026-09-15; blobs > 131072B omitted)

model/function.go

@@ -0,0 +1,69 @@
+// 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 model
+
+import (
+	"sync"
+
+	"github.com/casbin/casbin/v3/util"
+	"github.com/casbin/govaluate"
+)
+
+// FunctionMap represents the collection of Function.
+type FunctionMap struct {
+	fns *sync.Map
+}
+
+// [string]govaluate.ExpressionFunction
+
+// AddFunction adds an expression function.
+func (fm *FunctionMap) AddFunction(name string, function govaluate.ExpressionFunction) {
+	fm.fns.LoadOrStore(name, function)
+}
+
+// LoadFunctionMap loads an initial function map.
+func LoadFunctionMap() FunctionMap {
+	fm := &FunctionMap{}
+	fm.fns = &sync.Map{}
+
+	fm.AddFunction("keyMatch", util.KeyMatchFunc)
+	fm.AddFunction("keyGet", util.KeyGetFunc)
+	fm.AddFunction("keyMatch2", util.KeyMatch2Func)
+	fm.AddFunction("keyGet2", util.KeyGet2Func)
+	fm.AddFunction("keyMatch3", util.KeyMatch3Func)
+	fm.AddFunction("keyGet3", util.KeyGet3Func)
+	fm.AddFunction("keyMatch4", util.KeyMatch4Func)
+	fm.AddFunction("keyMatch5", util.KeyMatch5Func)
+	fm.AddFunction("regexMatch", util.RegexMatchFunc)
+	fm.AddFunction("ipMatch", util.IPMatchFunc)
+	fm.AddFunction("globMatch", util.GlobMatchFunc)
+
+	return *fm
+}
+
+// GetFunctions return a map with all the functions.
+func (fm *FunctionMap) GetFunctions() map[string]govaluate.ExpressionFunction {
+	ret := make(map[string]govaluate.ExpressionFunction)
+
+	fm.fns.Range(func(k interface{}, v interface{}) bool {
+		ret[k.(string)] = v.(govaluate.ExpressionFunction)
+		return true
+	})
+
+	return ret
+}