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protomapper.go
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protomapper.go
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package protomapper
import (
"fmt"
"github.com/ricdeau/protoast"
"github.com/ricdeau/protoast/ast"
"github.com/ricdeau/protomapper/internal/helpers"
"github.com/ricdeau/protomapper/internal/mappers"
"github.com/ricdeau/protomapper/internal/registry"
"github.com/ricdeau/protomapper/internal/renderer"
)
var excludeNone = func(field ProtoField) bool {
return false
}
var anyService ServiceFilter = func(_ *ProtoService) bool {
return true
}
type ProtoMapper struct {
astBuilder *protoast.Builder
typeMapper *mappers.TypeMapper
typeRenderer *renderer.TypeRenderer
converterRenderer *renderer.ConvertersRenderer
excludeMessageField func(field ProtoField) bool
}
// NewProtoMapper setup new protomapper.
func NewProtoMapper(cfg *Config) *ProtoMapper {
result := &ProtoMapper{}
result.excludeMessageField = excludeNone
typeMapper := mappers.NewTypeMapper(result.excludeMessageField)
result.typeMapper = typeMapper
result.typeRenderer = renderer.NewTypeRenderer(cfg, typeMapper)
result.converterRenderer = renderer.NewConvertersRenderer(cfg, typeMapper)
return result
}
// WithOptions add options for protomapper.
func (p *ProtoMapper) WithOptions(opts ...Option) *ProtoMapper {
for _, opt := range opts {
if opt != nil {
opt.apply(p)
}
}
return p
}
// ResolveTypes resolver *.proto files and collect defined types.
func (p *ProtoMapper) ResolveTypes(
resolver FileResolver,
serviceFilter ServiceFilter,
fileNames ...string,
) error {
if serviceFilter == nil {
serviceFilter = anyService
}
p.astBuilder = protoast.NewBuilder(protoast.NewFilesViaResolver(resolver), func(err error) {
panic(err)
})
for _, fName := range fileNames {
file, err := p.astBuilder.AST(fName)
if err != nil {
return fmt.Errorf("get AST for file %q: %v", fName, err)
}
for _, s := range file.Services {
if !serviceFilter(s) {
continue
}
for _, method := range s.Methods {
if err = p.visitType(method.InputMessage()); err != nil {
return fmt.Errorf("visit input message for method %q", method.GetFullName())
}
if err = p.visitType(method.OutputMessage()); err != nil {
return fmt.Errorf("visit output message for method %q", method.GetFullName())
}
}
}
}
return nil
}
func (p *ProtoMapper) visitType(t ast.Type) error {
if registry.Types.GetType(t) != nil {
return nil
}
pbType, err := p.typeMapper.FromProtoType(t)
if err != nil {
return fmt.Errorf("map type %T: %v", t, err)
}
registry.Types.Put(t, pbType)
if msg, ok := t.(*ast.Message); ok {
fields := msg.AllFields()
for _, field := range fields {
if err = p.visitType(ast.FieldType(field)); err != nil {
return err
}
}
}
return nil
}
// TypeMapper get type mapper.
func (p *ProtoMapper) TypeMapper() TypeMapper {
return p.typeMapper
}
// Types get types.
func (p *ProtoMapper) Types() *registry.TypeDict {
return registry.Types
}
// Fields get fields.
func (p *ProtoMapper) Fields() *registry.FieldDict {
return registry.Fields
}
// TypeRenderer get type renderer.
func (p *ProtoMapper) TypeRenderer() Renderer {
return p.typeRenderer
}
// ConvertersRenderer get converters renderer.
func (p *ProtoMapper) ConvertersRenderer() Renderer {
return p.converterRenderer
}
func (p *ProtoMapper) ASTBuilder() *protoast.Builder {
return p.astBuilder
}
func (p *ProtoMapper) SetTypeResolver(resolver func(r TypeResolver) TypeResolver) {
p.typeRenderer.SetTypeResolver(resolver)
p.converterRenderer.SetTypeResolver(resolver)
p.typeMapper.SetTypeResolver(resolver)
}
func (p *ProtoMapper) SetFileResolver(resolver func(r TypeResolver) TypeResolver) {
p.typeRenderer.SetFileResolver(resolver)
p.converterRenderer.SetFileResolver(resolver)
}
func (p *ProtoMapper) SetFieldResolver(resolver func(r FieldResolver) FieldResolver) {
p.typeRenderer.SetFieldResolver(resolver)
}
func (p *ProtoMapper) SetImportsResolver(resolver func(r ImportsResolver) ImportsResolver) {
p.converterRenderer.SetImportsResolver(resolver)
}
func AddMapper(pbTypeName string, mapper FieldMapper) {
registry.Mappers.Put(pbTypeName, mapper)
}
func GoTypeName(typ ProtoType) string {
return helpers.GoTypeName(typ)
}