forked from ebhomengo/niki
1081 lines
14 KiB
Go
1081 lines
14 KiB
Go
package swag
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import (
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"fmt"
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"go/ast"
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"reflect"
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"regexp"
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"strconv"
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"strings"
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"sync"
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"unicode"
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"github.com/go-openapi/spec"
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)
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var _ FieldParser = &tagBaseFieldParser{p: nil, field: nil, tag: ""}
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const (
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requiredLabel = "required"
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optionalLabel = "optional"
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swaggerTypeTag = "swaggertype"
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swaggerIgnoreTag = "swaggerignore"
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)
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type tagBaseFieldParser struct {
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p *Parser
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field *ast.Field
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tag reflect.StructTag
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}
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func newTagBaseFieldParser(p *Parser, field *ast.Field) FieldParser {
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fieldParser := tagBaseFieldParser{
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p: p,
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field: field,
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tag: "",
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}
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if fieldParser.field.Tag != nil {
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fieldParser.tag = reflect.StructTag(strings.ReplaceAll(field.Tag.Value, "`", ""))
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}
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return &fieldParser
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}
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func (ps *tagBaseFieldParser) ShouldSkip() bool {
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// Skip non-exported fields.
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if ps.field.Names != nil && !ast.IsExported(ps.field.Names[0].Name) {
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return true
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}
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if ps.field.Tag == nil {
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return false
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}
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ignoreTag := ps.tag.Get(swaggerIgnoreTag)
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if strings.EqualFold(ignoreTag, "true") {
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return true
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}
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// json:"tag,hoge"
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name := strings.TrimSpace(strings.Split(ps.tag.Get(jsonTag), ",")[0])
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if name == "-" {
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return true
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}
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return false
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}
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func (ps *tagBaseFieldParser) FieldName() (string, error) {
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var name string
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if ps.field.Tag != nil {
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// json:"tag,hoge"
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name = strings.TrimSpace(strings.Split(ps.tag.Get(jsonTag), ",")[0])
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if name != "" {
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return name, nil
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}
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// use "form" tag over json tag
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name = ps.FormName()
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if name != "" {
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return name, nil
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}
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}
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if ps.field.Names == nil {
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return "", nil
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}
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switch ps.p.PropNamingStrategy {
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case SnakeCase:
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return toSnakeCase(ps.field.Names[0].Name), nil
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case PascalCase:
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return ps.field.Names[0].Name, nil
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default:
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return toLowerCamelCase(ps.field.Names[0].Name), nil
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}
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}
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func (ps *tagBaseFieldParser) firstTagValue(tag string) string {
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if ps.field.Tag != nil {
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return strings.TrimRight(strings.TrimSpace(strings.Split(ps.tag.Get(tag), ",")[0]), "[]")
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}
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return ""
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}
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func (ps *tagBaseFieldParser) FormName() string {
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return ps.firstTagValue(formTag)
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}
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func (ps *tagBaseFieldParser) HeaderName() string {
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return ps.firstTagValue(headerTag)
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}
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func (ps *tagBaseFieldParser) PathName() string {
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return ps.firstTagValue(uriTag)
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}
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func toSnakeCase(in string) string {
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var (
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runes = []rune(in)
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length = len(runes)
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out []rune
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)
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for idx := 0; idx < length; idx++ {
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if idx > 0 && unicode.IsUpper(runes[idx]) &&
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((idx+1 < length && unicode.IsLower(runes[idx+1])) || unicode.IsLower(runes[idx-1])) {
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out = append(out, '_')
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}
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out = append(out, unicode.ToLower(runes[idx]))
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}
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return string(out)
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}
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func toLowerCamelCase(in string) string {
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var flag bool
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out := make([]rune, len(in))
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runes := []rune(in)
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for i, curr := range runes {
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if (i == 0 && unicode.IsUpper(curr)) || (flag && unicode.IsUpper(curr)) {
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out[i] = unicode.ToLower(curr)
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flag = true
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continue
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}
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out[i] = curr
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flag = false
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}
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return string(out)
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}
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func (ps *tagBaseFieldParser) CustomSchema() (*spec.Schema, error) {
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if ps.field.Tag == nil {
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return nil, nil
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}
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typeTag := ps.tag.Get(swaggerTypeTag)
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if typeTag != "" {
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return BuildCustomSchema(strings.Split(typeTag, ","))
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}
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return nil, nil
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}
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type structField struct {
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schemaType string
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arrayType string
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formatType string
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maximum *float64
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minimum *float64
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multipleOf *float64
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maxLength *int64
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minLength *int64
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maxItems *int64
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minItems *int64
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exampleValue interface{}
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enums []interface{}
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enumVarNames []interface{}
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unique bool
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}
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// splitNotWrapped slices s into all substrings separated by sep if sep is not
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// wrapped by brackets and returns a slice of the substrings between those separators.
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func splitNotWrapped(s string, sep rune) []string {
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openCloseMap := map[rune]rune{
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'(': ')',
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'[': ']',
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'{': '}',
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}
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var (
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result = make([]string, 0)
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current = strings.Builder{}
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openCount = 0
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openChar rune
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)
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for _, char := range s {
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switch {
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case openChar == 0 && openCloseMap[char] != 0:
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openChar = char
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openCount++
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current.WriteRune(char)
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case char == openChar:
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openCount++
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current.WriteRune(char)
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case openCount > 0 && char == openCloseMap[openChar]:
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openCount--
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current.WriteRune(char)
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case openCount == 0 && char == sep:
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result = append(result, current.String())
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openChar = 0
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current = strings.Builder{}
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default:
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current.WriteRune(char)
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}
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}
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if current.String() != "" {
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result = append(result, current.String())
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}
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return result
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}
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// ComplementSchema complement schema with field properties
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func (ps *tagBaseFieldParser) ComplementSchema(schema *spec.Schema) error {
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types := ps.p.GetSchemaTypePath(schema, 2)
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if len(types) == 0 {
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return fmt.Errorf("invalid type for field: %s", ps.field.Names[0])
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}
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if IsRefSchema(schema) {
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var newSchema = spec.Schema{}
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err := ps.complementSchema(&newSchema, types)
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if err != nil {
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return err
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}
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if !reflect.ValueOf(newSchema).IsZero() {
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*schema = *(newSchema.WithAllOf(*schema))
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}
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return nil
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}
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return ps.complementSchema(schema, types)
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}
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// complementSchema complement schema with field properties
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func (ps *tagBaseFieldParser) complementSchema(schema *spec.Schema, types []string) error {
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if ps.field.Tag == nil {
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if ps.field.Doc != nil {
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schema.Description = strings.TrimSpace(ps.field.Doc.Text())
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}
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if schema.Description == "" && ps.field.Comment != nil {
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schema.Description = strings.TrimSpace(ps.field.Comment.Text())
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}
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return nil
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}
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field := &structField{
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schemaType: types[0],
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formatType: ps.tag.Get(formatTag),
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}
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if len(types) > 1 && (types[0] == ARRAY || types[0] == OBJECT) {
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field.arrayType = types[1]
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}
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jsonTagValue := ps.tag.Get(jsonTag)
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bindingTagValue := ps.tag.Get(bindingTag)
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if bindingTagValue != "" {
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parseValidTags(bindingTagValue, field)
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}
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validateTagValue := ps.tag.Get(validateTag)
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if validateTagValue != "" {
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parseValidTags(validateTagValue, field)
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}
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enumsTagValue := ps.tag.Get(enumsTag)
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if enumsTagValue != "" {
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err := parseEnumTags(enumsTagValue, field)
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if err != nil {
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return err
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}
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}
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if IsNumericType(field.schemaType) || IsNumericType(field.arrayType) {
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maximum, err := getFloatTag(ps.tag, maximumTag)
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if err != nil {
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return err
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}
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if maximum != nil {
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field.maximum = maximum
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}
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minimum, err := getFloatTag(ps.tag, minimumTag)
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if err != nil {
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return err
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}
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if minimum != nil {
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field.minimum = minimum
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}
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multipleOf, err := getFloatTag(ps.tag, multipleOfTag)
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if err != nil {
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return err
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}
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if multipleOf != nil {
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field.multipleOf = multipleOf
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}
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}
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if field.schemaType == STRING || field.arrayType == STRING {
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maxLength, err := getIntTag(ps.tag, maxLengthTag)
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if err != nil {
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return err
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}
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if maxLength != nil {
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field.maxLength = maxLength
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}
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minLength, err := getIntTag(ps.tag, minLengthTag)
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if err != nil {
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return err
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}
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if minLength != nil {
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field.minLength = minLength
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}
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}
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// json:"name,string" or json:",string"
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exampleTagValue, ok := ps.tag.Lookup(exampleTag)
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if ok {
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field.exampleValue = exampleTagValue
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if !strings.Contains(jsonTagValue, ",string") {
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example, err := defineTypeOfExample(field.schemaType, field.arrayType, exampleTagValue)
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if err != nil {
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return err
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}
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field.exampleValue = example
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}
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}
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// perform this after setting everything else (min, max, etc...)
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if strings.Contains(jsonTagValue, ",string") {
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// @encoding/json: "It applies only to fields of string, floating point, integer, or boolean types."
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defaultValues := map[string]string{
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// Zero Values as string
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STRING: "",
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INTEGER: "0",
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BOOLEAN: "false",
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NUMBER: "0",
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}
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defaultValue, ok := defaultValues[field.schemaType]
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if ok {
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field.schemaType = STRING
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*schema = *PrimitiveSchema(field.schemaType)
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if field.exampleValue == nil {
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// if exampleValue is not defined by the user,
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// we will force an example with a correct value
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// (eg: int->"0", bool:"false")
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field.exampleValue = defaultValue
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}
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}
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}
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if ps.field.Doc != nil {
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schema.Description = strings.TrimSpace(ps.field.Doc.Text())
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}
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if schema.Description == "" && ps.field.Comment != nil {
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schema.Description = strings.TrimSpace(ps.field.Comment.Text())
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}
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schema.ReadOnly = ps.tag.Get(readOnlyTag) == "true"
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defaultTagValue := ps.tag.Get(defaultTag)
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if defaultTagValue != "" {
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value, err := defineType(field.schemaType, defaultTagValue)
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if err != nil {
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return err
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}
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schema.Default = value
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}
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schema.Example = field.exampleValue
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if field.schemaType != ARRAY {
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schema.Format = field.formatType
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}
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extensionsTagValue := ps.tag.Get(extensionsTag)
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if extensionsTagValue != "" {
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schema.Extensions = setExtensionParam(extensionsTagValue)
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}
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varNamesTag := ps.tag.Get("x-enum-varnames")
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if varNamesTag != "" {
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varNames := strings.Split(varNamesTag, ",")
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if len(varNames) != len(field.enums) {
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return fmt.Errorf("invalid count of x-enum-varnames. expected %d, got %d", len(field.enums), len(varNames))
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}
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field.enumVarNames = nil
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for _, v := range varNames {
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field.enumVarNames = append(field.enumVarNames, v)
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}
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if field.schemaType == ARRAY {
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// Add the var names in the items schema
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if schema.Items.Schema.Extensions == nil {
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schema.Items.Schema.Extensions = map[string]interface{}{}
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}
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schema.Items.Schema.Extensions[enumVarNamesExtension] = field.enumVarNames
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} else {
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// Add to top level schema
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if schema.Extensions == nil {
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schema.Extensions = map[string]interface{}{}
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}
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schema.Extensions[enumVarNamesExtension] = field.enumVarNames
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}
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}
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eleSchema := schema
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if field.schemaType == ARRAY {
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// For Array only
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schema.MaxItems = field.maxItems
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schema.MinItems = field.minItems
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schema.UniqueItems = field.unique
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eleSchema = schema.Items.Schema
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eleSchema.Format = field.formatType
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}
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eleSchema.Maximum = field.maximum
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eleSchema.Minimum = field.minimum
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eleSchema.MultipleOf = field.multipleOf
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eleSchema.MaxLength = field.maxLength
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eleSchema.MinLength = field.minLength
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eleSchema.Enum = field.enums
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return nil
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}
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|
|
func getFloatTag(structTag reflect.StructTag, tagName string) (*float64, error) {
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|
|
strValue := structTag.Get(tagName)
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|
|
if strValue == "" {
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return nil, nil
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}
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|
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value, err := strconv.ParseFloat(strValue, 64)
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|
|
if err != nil {
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return nil, fmt.Errorf("can't parse numeric value of %q tag: %v", tagName, err)
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|
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}
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|
|
|
return &value, nil
|
|
|
|
}
|
|
|
|
func getIntTag(structTag reflect.StructTag, tagName string) (*int64, error) {
|
|
|
|
strValue := structTag.Get(tagName)
|
|
|
|
if strValue == "" {
|
|
|
|
return nil, nil
|
|
|
|
}
|
|
|
|
value, err := strconv.ParseInt(strValue, 10, 64)
|
|
|
|
if err != nil {
|
|
|
|
return nil, fmt.Errorf("can't parse numeric value of %q tag: %v", tagName, err)
|
|
|
|
}
|
|
|
|
return &value, nil
|
|
|
|
}
|
|
|
|
func (ps *tagBaseFieldParser) IsRequired() (bool, error) {
|
|
|
|
if ps.field.Tag == nil {
|
|
|
|
return false, nil
|
|
|
|
}
|
|
|
|
bindingTag := ps.tag.Get(bindingTag)
|
|
|
|
if bindingTag != "" {
|
|
|
|
for _, val := range strings.Split(bindingTag, ",") {
|
|
|
|
switch val {
|
|
|
|
case requiredLabel:
|
|
|
|
return true, nil
|
|
|
|
case optionalLabel:
|
|
|
|
return false, nil
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
validateTag := ps.tag.Get(validateTag)
|
|
|
|
if validateTag != "" {
|
|
|
|
for _, val := range strings.Split(validateTag, ",") {
|
|
|
|
switch val {
|
|
|
|
case requiredLabel:
|
|
|
|
return true, nil
|
|
|
|
case optionalLabel:
|
|
|
|
return false, nil
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return ps.p.RequiredByDefault, nil
|
|
|
|
}
|
|
|
|
func parseValidTags(validTag string, sf *structField) {
|
|
|
|
// `validate:"required,max=10,min=1"`
|
|
|
|
// ps. required checked by IsRequired().
|
|
|
|
for _, val := range strings.Split(validTag, ",") {
|
|
|
|
var (
|
|
valValue string
|
|
|
|
keyVal = strings.Split(val, "=")
|
|
)
|
|
|
|
switch len(keyVal) {
|
|
|
|
case 1:
|
|
|
|
case 2:
|
|
|
|
valValue = strings.ReplaceAll(strings.ReplaceAll(keyVal[1], utf8HexComma, ","), utf8Pipe, "|")
|
|
|
|
default:
|
|
|
|
continue
|
|
|
|
}
|
|
|
|
switch keyVal[0] {
|
|
|
|
case "max", "lte":
|
|
|
|
sf.setMax(valValue)
|
|
|
|
case "min", "gte":
|
|
|
|
sf.setMin(valValue)
|
|
|
|
case "oneof":
|
|
|
|
sf.setOneOf(valValue)
|
|
|
|
case "unique":
|
|
|
|
if sf.schemaType == ARRAY {
|
|
|
|
sf.unique = true
|
|
|
|
}
|
|
|
|
case "dive":
|
|
|
|
// ignore dive
|
|
|
|
return
|
|
|
|
default:
|
|
|
|
continue
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
func parseEnumTags(enumTag string, field *structField) error {
|
|
|
|
enumType := field.schemaType
|
|
|
|
if field.schemaType == ARRAY {
|
|
|
|
enumType = field.arrayType
|
|
|
|
}
|
|
|
|
field.enums = nil
|
|
|
|
for _, e := range strings.Split(enumTag, ",") {
|
|
|
|
value, err := defineType(enumType, e)
|
|
|
|
if err != nil {
|
|
|
|
return err
|
|
|
|
}
|
|
|
|
field.enums = append(field.enums, value)
|
|
|
|
}
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
func (sf *structField) setOneOf(valValue string) {
|
|
|
|
if len(sf.enums) != 0 {
|
|
|
|
return
|
|
|
|
}
|
|
|
|
enumType := sf.schemaType
|
|
|
|
if sf.schemaType == ARRAY {
|
|
|
|
enumType = sf.arrayType
|
|
|
|
}
|
|
|
|
valValues := parseOneOfParam2(valValue)
|
|
|
|
for i := range valValues {
|
|
|
|
value, err := defineType(enumType, valValues[i])
|
|
|
|
if err != nil {
|
|
|
|
continue
|
|
|
|
}
|
|
|
|
sf.enums = append(sf.enums, value)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
func (sf *structField) setMin(valValue string) {
|
|
|
|
value, err := strconv.ParseFloat(valValue, 64)
|
|
|
|
if err != nil {
|
|
|
|
return
|
|
|
|
}
|
|
|
|
switch sf.schemaType {
|
|
|
|
case INTEGER, NUMBER:
|
|
|
|
sf.minimum = &value
|
|
|
|
case STRING:
|
|
|
|
intValue := int64(value)
|
|
|
|
sf.minLength = &intValue
|
|
|
|
case ARRAY:
|
|
|
|
intValue := int64(value)
|
|
|
|
sf.minItems = &intValue
|
|
|
|
}
|
|
|
|
}
|
|
|
|
func (sf *structField) setMax(valValue string) {
|
|
|
|
value, err := strconv.ParseFloat(valValue, 64)
|
|
|
|
if err != nil {
|
|
|
|
return
|
|
|
|
}
|
|
|
|
switch sf.schemaType {
|
|
|
|
case INTEGER, NUMBER:
|
|
|
|
sf.maximum = &value
|
|
|
|
case STRING:
|
|
|
|
intValue := int64(value)
|
|
|
|
sf.maxLength = &intValue
|
|
|
|
case ARRAY:
|
|
|
|
intValue := int64(value)
|
|
|
|
sf.maxItems = &intValue
|
|
|
|
}
|
|
|
|
}
|
|
|
|
const (
|
|
utf8HexComma = "0x2C"
|
|
|
|
utf8Pipe = "0x7C"
|
|
)
|
|
|
|
// These code copy from
|
|
|
|
// https://github.com/go-playground/validator/blob/d4271985b44b735c6f76abc7a06532ee997f9476/baked_in.go#L207
|
|
|
|
// ---.
|
|
|
|
var oneofValsCache = map[string][]string{}
|
|
|
|
var oneofValsCacheRWLock = sync.RWMutex{}
|
|
|
|
var splitParamsRegex = regexp.MustCompile(`'[^']*'|\S+`)
|
|
|
|
func parseOneOfParam2(param string) []string {
|
|
|
|
oneofValsCacheRWLock.RLock()
|
|
|
|
values, ok := oneofValsCache[param]
|
|
|
|
oneofValsCacheRWLock.RUnlock()
|
|
|
|
if !ok {
|
|
|
|
oneofValsCacheRWLock.Lock()
|
|
|
|
values = splitParamsRegex.FindAllString(param, -1)
|
|
|
|
for i := 0; i < len(values); i++ {
|
|
|
|
values[i] = strings.ReplaceAll(values[i], "'", "")
|
|
|
|
}
|
|
|
|
oneofValsCache[param] = values
|
|
|
|
oneofValsCacheRWLock.Unlock()
|
|
|
|
}
|
|
|
|
return values
|
|
|
|
}
|
|
|
|
// ---.
|