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|
package modelgen
import (
"fmt"
"go/types"
"sort"
"github.com/99designs/gqlgen/codegen/config"
"github.com/99designs/gqlgen/codegen/templates"
"github.com/99designs/gqlgen/internal/code"
"github.com/99designs/gqlgen/plugin"
"github.com/vektah/gqlparser/ast"
)
type ModelBuild struct {
PackageName string
Interfaces []*Interface
Models []*Object
Enums []*Enum
Scalars []string
}
type Interface struct {
Description string
Name string
}
type Object struct {
Description string
Name string
Fields []*Field
Implements []string
}
type Field struct {
Description string
Name string
Type types.Type
Tag string
}
type Enum struct {
Description string
Name string
Values []*EnumValue
}
type EnumValue struct {
Description string
Name string
}
func New() plugin.Plugin {
return &Plugin{}
}
type Plugin struct{}
var _ plugin.ConfigMutator = &Plugin{}
func (m *Plugin) Name() string {
return "modelgen"
}
func (m *Plugin) MutateConfig(cfg *config.Config) error {
if err := cfg.Check(); err != nil {
return err
}
schema, _, err := cfg.LoadSchema()
if err != nil {
return err
}
cfg.InjectBuiltins(schema)
binder, err := cfg.NewBinder(schema)
if err != nil {
return err
}
b := &ModelBuild{
PackageName: cfg.Model.Package,
}
for _, schemaType := range schema.Types {
if cfg.Models.UserDefined(schemaType.Name) {
continue
}
switch schemaType.Kind {
case ast.Interface, ast.Union:
it := &Interface{
Description: schemaType.Description,
Name: schemaType.Name,
}
b.Interfaces = append(b.Interfaces, it)
case ast.Object, ast.InputObject:
if schemaType == schema.Query || schemaType == schema.Mutation || schemaType == schema.Subscription {
continue
}
it := &Object{
Description: schemaType.Description,
Name: schemaType.Name,
}
for _, implementor := range schema.GetImplements(schemaType) {
it.Implements = append(it.Implements, implementor.Name)
}
for _, field := range schemaType.Fields {
var typ types.Type
fieldDef := schema.Types[field.Type.Name()]
if cfg.Models.UserDefined(field.Type.Name()) {
pkg, typeName := code.PkgAndType(cfg.Models[field.Type.Name()].Model[0])
typ, err = binder.FindType(pkg, typeName)
if err != nil {
return err
}
} else {
switch fieldDef.Kind {
case ast.Scalar:
// no user defined model, referencing a default scalar
typ = types.NewNamed(
types.NewTypeName(0, cfg.Model.Pkg(), "string", nil),
nil,
nil,
)
case ast.Interface, ast.Union:
// no user defined model, referencing a generated interface type
typ = types.NewNamed(
types.NewTypeName(0, cfg.Model.Pkg(), templates.ToGo(field.Type.Name()), nil),
types.NewInterfaceType([]*types.Func{}, []types.Type{}),
nil,
)
case ast.Enum:
// no user defined model, must reference a generated enum
typ = types.NewNamed(
types.NewTypeName(0, cfg.Model.Pkg(), templates.ToGo(field.Type.Name()), nil),
nil,
nil,
)
case ast.Object, ast.InputObject:
// no user defined model, must reference a generated struct
typ = types.NewNamed(
types.NewTypeName(0, cfg.Model.Pkg(), templates.ToGo(field.Type.Name()), nil),
types.NewStruct(nil, nil),
nil,
)
default:
panic(fmt.Errorf("unknown ast type %s", fieldDef.Kind))
}
}
name := field.Name
if nameOveride := cfg.Models[schemaType.Name].Fields[field.Name].FieldName; nameOveride != "" {
name = nameOveride
}
typ = binder.CopyModifiersFromAst(field.Type, typ)
if isStruct(typ) && (fieldDef.Kind == ast.Object || fieldDef.Kind == ast.InputObject) {
typ = types.NewPointer(typ)
}
it.Fields = append(it.Fields, &Field{
Name: name,
Type: typ,
Description: field.Description,
Tag: `json:"` + field.Name + `"`,
})
}
b.Models = append(b.Models, it)
case ast.Enum:
it := &Enum{
Name: schemaType.Name,
Description: schemaType.Description,
}
for _, v := range schemaType.EnumValues {
it.Values = append(it.Values, &EnumValue{
Name: v.Name,
Description: v.Description,
})
}
b.Enums = append(b.Enums, it)
case ast.Scalar:
b.Scalars = append(b.Scalars, schemaType.Name)
}
}
sort.Slice(b.Enums, func(i, j int) bool { return b.Enums[i].Name < b.Enums[j].Name })
sort.Slice(b.Models, func(i, j int) bool { return b.Models[i].Name < b.Models[j].Name })
sort.Slice(b.Interfaces, func(i, j int) bool { return b.Interfaces[i].Name < b.Interfaces[j].Name })
for _, it := range b.Enums {
cfg.Models.Add(it.Name, cfg.Model.ImportPath()+"."+templates.ToGo(it.Name))
}
for _, it := range b.Models {
cfg.Models.Add(it.Name, cfg.Model.ImportPath()+"."+templates.ToGo(it.Name))
}
for _, it := range b.Interfaces {
cfg.Models.Add(it.Name, cfg.Model.ImportPath()+"."+templates.ToGo(it.Name))
}
for _, it := range b.Scalars {
cfg.Models.Add(it, "github.com/99designs/gqlgen/graphql.String")
}
if len(b.Models) == 0 && len(b.Enums) == 0 {
return nil
}
return templates.Render(templates.Options{
PackageName: cfg.Model.Package,
Filename: cfg.Model.Filename,
Data: b,
GeneratedHeader: true,
})
}
func isStruct(t types.Type) bool {
_, is := t.Underlying().(*types.Struct)
return is
}
|
