stackrox/central/graphql/generator/codegen/codegen.go at master · stackrox/stackrox · GitHub

History

171 lines (161 loc) · 4.69 KB

Raw

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

package codegen

import (

"bytes"

_ "embed"

"fmt"

"io"

"reflect"

"strings"

"text/template"

"github.com/stackrox/rox/central/graphql/generator"

"github.com/stackrox/rox/pkg/protocompat"

"github.com/stackrox/rox/pkg/set"

"google.golang.org/protobuf/reflect/protoreflect"

"google.golang.org/protobuf/reflect/protoregistry"

)

//go:embed codegen.go.tpl

var codegen string

var templates = map[string]string{

"codegen": codegen,

"enum": `value.String()`,

"enumslice": `stringSlice(value)`,

"float": `float64(value)`,

"id": `graphql.ID(value)`,

"int": `int32(value)`,

"label": `labelsResolver(value)`,

"pointer": `resolver.root.wrap{{.Type.Elem.Name}}(value, true, nil)`,

"pointerslice": `resolver.root.wrap{{plural .Type.Elem.Elem.Name}}(value, nil)`,

"raw": `value`,

"rawslice": `value`,

"time": `protocompat.ConvertTimestampToGraphqlTimeOrError(value)`,

"bytes": `base64.StdEncoding.EncodeToString(value)`,

}

func listName(td typeData) string {

split := strings.Split(td.Package, "/")

return fmt.Sprintf("%s.List%s", split[len(split)-1], td.Name)

}

func isEnum(p reflect.Type) bool {

if p == nil {

return false

}

fullName := protoreflect.FullName(strings.ReplaceAll(importedName(p), "_", "."))

_, err := protoregistry.GlobalTypes.FindEnumByName(fullName)

return err == nil

}

func getFieldTransform(fd fieldData) (templateName string, returnType string) {

switch fd.Type.Kind() {

case reflect.String:

if fd.Name == "Id" {

return "id", "graphql.ID"

}

return "raw", "string"

case reflect.Int32:

if isEnum(fd.Type) {

return "enum", "string"

}

return "raw", "int32"

case reflect.Uint32:

return "int", "int32"

case reflect.Int64:

return "int", "int32"

case reflect.Float32:

return "float", "float64"

case reflect.Float64:

return "raw", "float64"

case reflect.Bool:

return "raw", "bool"

case reflect.Uint8:

return "raw", "byte"

case reflect.Map:

if fd.Type.Key().Kind() == reflect.String && fd.Type.Elem().Kind() == reflect.String {

return "label", "labels"

}

case reflect.Pointer:

if fd.Type == protocompat.TimestampPtrType {

return "time", "(*graphql.Time, error)"

}

if fd.Type.Implements(messageType) {

if isListType(fd.Type) {

// if a field returns a list type, we don't automatically handle this for now.

return "", ""

}

return "pointer", fmt.Sprintf("(*%sResolver, error)", lower(fd.Type.Elem().Name()))

}

case reflect.Slice:

// Handle []byte (protobuf bytes) as base64-encoded strings

if fd.Type.Elem().Kind() == reflect.Uint8 {

return "bytes", "string"

}

template, ret := getFieldTransform(fieldData{Name: fd.Name, Type: fd.Type.Elem()})

if len(ret) > 0 && ret[0] == '(' {

// this converts (*fooResolver, error) into ([]*fooResolver, error)

return template + "slice", ret[0:1] + "[]" + ret[1:]

}

return template + "slice", "[]" + ret

}

return "", ""

}

func translator(t *template.Template) func(fieldData) string {

return func(fd fieldData) string {

tmplName, _ := getFieldTransform(fd)

b := &bytes.Buffer{}

err := t.ExecuteTemplate(b, tmplName, fd)

if err != nil {

panic(err)

}

return b.String()

}

func valueType(fd fieldData) string {

_, returnType := getFieldTransform(fd)

return returnType

}

func listField(td schemaEntry, field fieldData) bool {

t, ok := td.ListData[field.Name]

return ok && t == field.Type

}

// GenerateResolvers produces go code for resolvers for all the types found by the typewalk.

func GenerateResolvers(parameters generator.TypeWalkParameters, writer io.Writer) {

typeData := typeWalk(parameters)

rootTemplate := template.New("codegen")

rootTemplate.Funcs(template.FuncMap{

"importedName": importedName,

"isEnum": isEnum,

"listField": listField,

"listName": listName,

"lower": lower,

"nonListField": func(td schemaEntry, field fieldData) bool { return !listField(td, field) },

"plural": plural,

"translator": translator(rootTemplate),

"valueType": valueType,

"schemaType": schemaType,

})

for name, text := range templates {

thisTemplate := rootTemplate

if rootTemplate.Name() != name {

thisTemplate = rootTemplate.New(name)

}

_, err := thisTemplate.Parse(text)

if err != nil {

panic(fmt.Sprintf("Template %q: %s", name, err))

}

imports := set.NewStringSet()

for _, td := range typeData {

// Input types are not directly referenced in the generated Go code.

if td.IsInputType {

continue

}

if td.Package != "" {

imports.Add(td.Package)

}

entries := makeSchemaEntries(typeData)

err := rootTemplate.Execute(writer, struct {

Entries []schemaEntry

Imports map[string]struct{}

}{entries, imports})

if err != nil {

panic(err)

}

stackrox/central/graphql/generator/codegen/codegen.go at master · stackrox/stackrox · GitHub

Uh oh!

Expand file tree

Breadcrumbs

codegen.go

Latest commit

History

Breadcrumbs

codegen.go

File metadata and controls