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// Copyright 2017 Google Inc. 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 compiler
import (
"fmt"
"gopkg.in/yaml.v2"
"regexp"
"sort"
"strconv"
)
// compiler helper functions, usually called from generated code
// UnpackMap gets a yaml.MapSlice if possible.
func UnpackMap(in interface{}) (yaml.MapSlice, bool) {
m, ok := in.(yaml.MapSlice)
if ok {
return m, true
}
// do we have an empty array?
a, ok := in.([]interface{})
if ok && len(a) == 0 {
// if so, return an empty map
return yaml.MapSlice{}, true
}
return nil, false
}
// SortedKeysForMap returns the sorted keys of a yaml.MapSlice.
func SortedKeysForMap(m yaml.MapSlice) []string {
keys := make([]string, 0)
for _, item := range m {
keys = append(keys, item.Key.(string))
}
sort.Strings(keys)
return keys
}
// MapHasKey returns true if a yaml.MapSlice contains a specified key.
func MapHasKey(m yaml.MapSlice, key string) bool {
for _, item := range m {
itemKey, ok := item.Key.(string)
if ok && key == itemKey {
return true
}
}
return false
}
// MapValueForKey gets the value of a map value for a specified key.
func MapValueForKey(m yaml.MapSlice, key string) interface{} {
for _, item := range m {
itemKey, ok := item.Key.(string)
if ok && key == itemKey {
return item.Value
}
}
return nil
}
// ConvertInterfaceArrayToStringArray converts an array of interfaces to an array of strings, if possible.
func ConvertInterfaceArrayToStringArray(interfaceArray []interface{}) []string {
stringArray := make([]string, 0)
for _, item := range interfaceArray {
v, ok := item.(string)
if ok {
stringArray = append(stringArray, v)
}
}
return stringArray
}
// MissingKeysInMap identifies which keys from a list of required keys are not in a map.
func MissingKeysInMap(m yaml.MapSlice, requiredKeys []string) []string {
missingKeys := make([]string, 0)
for _, k := range requiredKeys {
if !MapHasKey(m, k) {
missingKeys = append(missingKeys, k)
}
}
return missingKeys
}
// InvalidKeysInMap returns keys in a map that don't match a list of allowed keys and patterns.
func InvalidKeysInMap(m yaml.MapSlice, allowedKeys []string, allowedPatterns []*regexp.Regexp) []string {
invalidKeys := make([]string, 0)
for _, item := range m {
itemKey, ok := item.Key.(string)
if ok {
key := itemKey
found := false
// does the key match an allowed key?
for _, allowedKey := range allowedKeys {
if key == allowedKey {
found = true
break
}
}
if !found {
// does the key match an allowed pattern?
for _, allowedPattern := range allowedPatterns {
if allowedPattern.MatchString(key) {
found = true
break
}
}
if !found {
invalidKeys = append(invalidKeys, key)
}
}
}
}
return invalidKeys
}
// DescribeMap describes a map (for debugging purposes).
func DescribeMap(in interface{}, indent string) string {
description := ""
m, ok := in.(map[string]interface{})
if ok {
keys := make([]string, 0)
for k := range m {
keys = append(keys, k)
}
sort.Strings(keys)
for _, k := range keys {
v := m[k]
description += fmt.Sprintf("%s%s:\n", indent, k)
description += DescribeMap(v, indent+" ")
}
return description
}
a, ok := in.([]interface{})
if ok {
for i, v := range a {
description += fmt.Sprintf("%s%d:\n", indent, i)
description += DescribeMap(v, indent+" ")
}
return description
}
description += fmt.Sprintf("%s%+v\n", indent, in)
return description
}
// PluralProperties returns the string "properties" pluralized.
func PluralProperties(count int) string {
if count == 1 {
return "property"
}
return "properties"
}
// StringArrayContainsValue returns true if a string array contains a specified value.
func StringArrayContainsValue(array []string, value string) bool {
for _, item := range array {
if item == value {
return true
}
}
return false
}
// StringArrayContainsValues returns true if a string array contains all of a list of specified values.
func StringArrayContainsValues(array []string, values []string) bool {
for _, value := range values {
if !StringArrayContainsValue(array, value) {
return false
}
}
return true
}
// StringValue returns the string value of an item.
func StringValue(item interface{}) (value string, ok bool) {
value, ok = item.(string)
if ok {
return value, ok
}
intValue, ok := item.(int)
if ok {
return strconv.Itoa(intValue), true
}
return "", false
}
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