Rename pkg/{tagging,lifecycle} to pkg/bucket sub-directory (#8892)

Rename to allow for more such features to come in a more
proper hierarchical manner.

pkg/bucket/policy/condition/boolfunc.go

@@ -0,0 +1,105 @@
+/*
+ * MinIO Cloud Storage, (C) 2018 MinIO, Inc.
+ *
+ * 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 condition
+
+import (
+	"fmt"
+	"net/http"
+	"reflect"
+	"strconv"
+)
+
+// booleanFunc - Bool condition function. It checks whether Key is true or false.
+// https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements_condition_operators.html#Conditions_Boolean
+type booleanFunc struct {
+	k     Key
+	value string
+}
+
+// evaluate() - evaluates to check whether Key is present in given values or not.
+// Depending on condition boolean value, this function returns true or false.
+func (f booleanFunc) evaluate(values map[string][]string) bool {
+	requestValue, ok := values[http.CanonicalHeaderKey(f.k.Name())]
+	if !ok {
+		requestValue = values[f.k.Name()]
+	}
+
+	return f.value == requestValue[0]
+}
+
+// key() - returns condition key which is used by this condition function.
+func (f booleanFunc) key() Key {
+	return f.k
+}
+
+// name() - returns "Bool" condition name.
+func (f booleanFunc) name() name {
+	return boolean
+}
+
+func (f booleanFunc) String() string {
+	return fmt.Sprintf("%v:%v:%v", boolean, f.k, f.value)
+}
+
+// toMap - returns map representation of this function.
+func (f booleanFunc) toMap() map[Key]ValueSet {
+	if !f.k.IsValid() {
+		return nil
+	}
+
+	return map[Key]ValueSet{
+		f.k: NewValueSet(NewStringValue(f.value)),
+	}
+}
+
+func newBooleanFunc(key Key, values ValueSet) (Function, error) {
+	if key != AWSSecureTransport {
+		return nil, fmt.Errorf("only %v key is allowed for %v condition", AWSSecureTransport, boolean)
+	}
+
+	if len(values) != 1 {
+		return nil, fmt.Errorf("only one value is allowed for boolean condition")
+	}
+
+	var value Value
+	for v := range values {
+		value = v
+		switch v.GetType() {
+		case reflect.Bool:
+			if _, err := v.GetBool(); err != nil {
+				return nil, err
+			}
+		case reflect.String:
+			s, err := v.GetString()
+			if err != nil {
+				return nil, err
+			}
+			if _, err = strconv.ParseBool(s); err != nil {
+				return nil, fmt.Errorf("value must be a boolean string for boolean condition")
+			}
+		default:
+			return nil, fmt.Errorf("value must be a boolean for boolean condition")
+		}
+	}
+
+	return &booleanFunc{key, value.String()}, nil
+}
+
+// NewBoolFunc - returns new Bool function.
+func NewBoolFunc(key Key, value string) (Function, error) {
+	return &booleanFunc{key, value}, nil
+}