peridot/vendor/github.com/go-openapi/swag/util.go

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2022-07-07 20:11:50 +00:00
// Copyright 2015 go-swagger maintainers
//
// 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 swag
import (
"reflect"
"strings"
"unicode"
)
// commonInitialisms are common acronyms that are kept as whole uppercased words.
var commonInitialisms *indexOfInitialisms
// initialisms is a slice of sorted initialisms
var initialisms []string
var isInitialism func(string) bool
// GoNamePrefixFunc sets an optional rule to prefix go names
// which do not start with a letter.
//
// e.g. to help convert "123" into "{prefix}123"
//
// The default is to prefix with "X"
var GoNamePrefixFunc func(string) string
func init() {
// Taken from https://github.com/golang/lint/blob/3390df4df2787994aea98de825b964ac7944b817/lint.go#L732-L769
var configuredInitialisms = map[string]bool{
"ACL": true,
"API": true,
"ASCII": true,
"CPU": true,
"CSS": true,
"DNS": true,
"EOF": true,
"GUID": true,
"HTML": true,
"HTTPS": true,
"HTTP": true,
"ID": true,
"IP": true,
"IPv4": true,
"IPv6": true,
"JSON": true,
"LHS": true,
"OAI": true,
"QPS": true,
"RAM": true,
"RHS": true,
"RPC": true,
"SLA": true,
"SMTP": true,
"SQL": true,
"SSH": true,
"TCP": true,
"TLS": true,
"TTL": true,
"UDP": true,
"UI": true,
"UID": true,
"UUID": true,
"URI": true,
"URL": true,
"UTF8": true,
"VM": true,
"XML": true,
"XMPP": true,
"XSRF": true,
"XSS": true,
}
// a thread-safe index of initialisms
commonInitialisms = newIndexOfInitialisms().load(configuredInitialisms)
initialisms = commonInitialisms.sorted()
// a test function
isInitialism = commonInitialisms.isInitialism
}
const (
// collectionFormatComma = "csv"
collectionFormatSpace = "ssv"
collectionFormatTab = "tsv"
collectionFormatPipe = "pipes"
collectionFormatMulti = "multi"
)
// JoinByFormat joins a string array by a known format (e.g. swagger's collectionFormat attribute):
//
// ssv: space separated value
// tsv: tab separated value
// pipes: pipe (|) separated value
// csv: comma separated value (default)
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func JoinByFormat(data []string, format string) []string {
if len(data) == 0 {
return data
}
var sep string
switch format {
case collectionFormatSpace:
sep = " "
case collectionFormatTab:
sep = "\t"
case collectionFormatPipe:
sep = "|"
case collectionFormatMulti:
return data
default:
sep = ","
}
return []string{strings.Join(data, sep)}
}
// SplitByFormat splits a string by a known format:
//
// ssv: space separated value
// tsv: tab separated value
// pipes: pipe (|) separated value
// csv: comma separated value (default)
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func SplitByFormat(data, format string) []string {
if data == "" {
return nil
}
var sep string
switch format {
case collectionFormatSpace:
sep = " "
case collectionFormatTab:
sep = "\t"
case collectionFormatPipe:
sep = "|"
case collectionFormatMulti:
return nil
default:
sep = ","
}
var result []string
for _, s := range strings.Split(data, sep) {
if ts := strings.TrimSpace(s); ts != "" {
result = append(result, ts)
}
}
return result
}
type byInitialism []string
func (s byInitialism) Len() int {
return len(s)
}
func (s byInitialism) Swap(i, j int) {
s[i], s[j] = s[j], s[i]
}
func (s byInitialism) Less(i, j int) bool {
if len(s[i]) != len(s[j]) {
return len(s[i]) < len(s[j])
}
return strings.Compare(s[i], s[j]) > 0
}
// Removes leading whitespaces
func trim(str string) string {
return strings.Trim(str, " ")
}
// Shortcut to strings.ToUpper()
func upper(str string) string {
return strings.ToUpper(trim(str))
}
// Shortcut to strings.ToLower()
func lower(str string) string {
return strings.ToLower(trim(str))
}
// Camelize an uppercased word
func Camelize(word string) (camelized string) {
for pos, ru := range []rune(word) {
if pos > 0 {
camelized += string(unicode.ToLower(ru))
} else {
camelized += string(unicode.ToUpper(ru))
}
}
return
}
// ToFileName lowercases and underscores a go type name
func ToFileName(name string) string {
in := split(name)
out := make([]string, 0, len(in))
for _, w := range in {
out = append(out, lower(w))
}
return strings.Join(out, "_")
}
// ToCommandName lowercases and underscores a go type name
func ToCommandName(name string) string {
in := split(name)
out := make([]string, 0, len(in))
for _, w := range in {
out = append(out, lower(w))
}
return strings.Join(out, "-")
}
// ToHumanNameLower represents a code name as a human series of words
func ToHumanNameLower(name string) string {
in := newSplitter(withPostSplitInitialismCheck).split(name)
out := make([]string, 0, len(in))
for _, w := range in {
if !w.IsInitialism() {
out = append(out, lower(w.GetOriginal()))
} else {
out = append(out, w.GetOriginal())
}
}
return strings.Join(out, " ")
}
// ToHumanNameTitle represents a code name as a human series of words with the first letters titleized
func ToHumanNameTitle(name string) string {
in := newSplitter(withPostSplitInitialismCheck).split(name)
out := make([]string, 0, len(in))
for _, w := range in {
original := w.GetOriginal()
if !w.IsInitialism() {
out = append(out, Camelize(original))
} else {
out = append(out, original)
}
}
return strings.Join(out, " ")
}
// ToJSONName camelcases a name which can be underscored or pascal cased
func ToJSONName(name string) string {
in := split(name)
out := make([]string, 0, len(in))
for i, w := range in {
if i == 0 {
out = append(out, lower(w))
continue
}
out = append(out, Camelize(w))
}
return strings.Join(out, "")
}
// ToVarName camelcases a name which can be underscored or pascal cased
func ToVarName(name string) string {
res := ToGoName(name)
if isInitialism(res) {
return lower(res)
}
if len(res) <= 1 {
return lower(res)
}
return lower(res[:1]) + res[1:]
}
// ToGoName translates a swagger name which can be underscored or camel cased to a name that golint likes
func ToGoName(name string) string {
lexems := newSplitter(withPostSplitInitialismCheck).split(name)
result := ""
for _, lexem := range lexems {
goName := lexem.GetUnsafeGoName()
// to support old behavior
if lexem.IsInitialism() {
goName = upper(goName)
}
result += goName
}
if len(result) > 0 {
// Only prefix with X when the first character isn't an ascii letter
first := []rune(result)[0]
if !unicode.IsLetter(first) || (first > unicode.MaxASCII && !unicode.IsUpper(first)) {
if GoNamePrefixFunc == nil {
return "X" + result
}
result = GoNamePrefixFunc(name) + result
}
first = []rune(result)[0]
if unicode.IsLetter(first) && !unicode.IsUpper(first) {
result = string(append([]rune{unicode.ToUpper(first)}, []rune(result)[1:]...))
}
}
return result
}
// ContainsStrings searches a slice of strings for a case-sensitive match
func ContainsStrings(coll []string, item string) bool {
for _, a := range coll {
if a == item {
return true
}
}
return false
}
// ContainsStringsCI searches a slice of strings for a case-insensitive match
func ContainsStringsCI(coll []string, item string) bool {
for _, a := range coll {
if strings.EqualFold(a, item) {
return true
}
}
return false
}
type zeroable interface {
IsZero() bool
}
// IsZero returns true when the value passed into the function is a zero value.
// This allows for safer checking of interface values.
func IsZero(data interface{}) bool {
// check for things that have an IsZero method instead
if vv, ok := data.(zeroable); ok {
return vv.IsZero()
}
// continue with slightly more complex reflection
v := reflect.ValueOf(data)
switch v.Kind() {
case reflect.String:
return v.Len() == 0
case reflect.Bool:
return !v.Bool()
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return v.Int() == 0
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
return v.Uint() == 0
case reflect.Float32, reflect.Float64:
return v.Float() == 0
case reflect.Interface, reflect.Map, reflect.Ptr, reflect.Slice:
return v.IsNil()
case reflect.Struct, reflect.Array:
return reflect.DeepEqual(data, reflect.Zero(v.Type()).Interface())
case reflect.Invalid:
return true
}
return false
}
// AddInitialisms add additional initialisms
func AddInitialisms(words ...string) {
for _, word := range words {
// commonInitialisms[upper(word)] = true
commonInitialisms.add(upper(word))
}
// sort again
initialisms = commonInitialisms.sorted()
}
// CommandLineOptionsGroup represents a group of user-defined command line options
type CommandLineOptionsGroup struct {
ShortDescription string
LongDescription string
Options interface{}
}