mirror of https://github.com/go-gitea/gitea.git
438 lines
15 KiB
Go
438 lines
15 KiB
Go
package codescan
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import (
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"fmt"
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"go/ast"
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"go/types"
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"strings"
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"github.com/pkg/errors"
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"golang.org/x/tools/go/ast/astutil"
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"github.com/go-openapi/spec"
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)
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type responseTypable struct {
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in string
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header *spec.Header
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response *spec.Response
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}
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func (ht responseTypable) Level() int { return 0 }
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func (ht responseTypable) Typed(tpe, format string) {
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ht.header.Typed(tpe, format)
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}
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func bodyTypable(in string, schema *spec.Schema) (swaggerTypable, *spec.Schema) {
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if in == "body" {
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// get the schema for items on the schema property
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if schema == nil {
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schema = new(spec.Schema)
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}
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if schema.Items == nil {
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schema.Items = new(spec.SchemaOrArray)
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}
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if schema.Items.Schema == nil {
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schema.Items.Schema = new(spec.Schema)
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}
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schema.Typed("array", "")
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return schemaTypable{schema.Items.Schema, 1}, schema
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}
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return nil, nil
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}
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func (ht responseTypable) Items() swaggerTypable {
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bdt, schema := bodyTypable(ht.in, ht.response.Schema)
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if bdt != nil {
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ht.response.Schema = schema
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return bdt
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}
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if ht.header.Items == nil {
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ht.header.Items = new(spec.Items)
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}
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ht.header.Type = "array"
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return itemsTypable{ht.header.Items, 1}
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}
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func (ht responseTypable) SetRef(ref spec.Ref) {
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// having trouble seeing the usefulness of this one here
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ht.Schema().Ref = ref
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}
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func (ht responseTypable) Schema() *spec.Schema {
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if ht.response.Schema == nil {
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ht.response.Schema = new(spec.Schema)
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}
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return ht.response.Schema
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}
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func (ht responseTypable) SetSchema(schema *spec.Schema) {
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ht.response.Schema = schema
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}
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func (ht responseTypable) CollectionOf(items *spec.Items, format string) {
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ht.header.CollectionOf(items, format)
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}
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func (ht responseTypable) AddExtension(key string, value interface{}) {
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ht.response.AddExtension(key, value)
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}
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type headerValidations struct {
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current *spec.Header
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}
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func (sv headerValidations) SetMaximum(val float64, exclusive bool) {
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sv.current.Maximum = &val
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sv.current.ExclusiveMaximum = exclusive
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}
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func (sv headerValidations) SetMinimum(val float64, exclusive bool) {
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sv.current.Minimum = &val
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sv.current.ExclusiveMinimum = exclusive
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}
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func (sv headerValidations) SetMultipleOf(val float64) { sv.current.MultipleOf = &val }
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func (sv headerValidations) SetMinItems(val int64) { sv.current.MinItems = &val }
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func (sv headerValidations) SetMaxItems(val int64) { sv.current.MaxItems = &val }
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func (sv headerValidations) SetMinLength(val int64) { sv.current.MinLength = &val }
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func (sv headerValidations) SetMaxLength(val int64) { sv.current.MaxLength = &val }
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func (sv headerValidations) SetPattern(val string) { sv.current.Pattern = val }
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func (sv headerValidations) SetUnique(val bool) { sv.current.UniqueItems = val }
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func (sv headerValidations) SetCollectionFormat(val string) { sv.current.CollectionFormat = val }
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func (sv headerValidations) SetEnum(val string) {
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sv.current.Enum = parseEnum(val, &spec.SimpleSchema{Type: sv.current.Type, Format: sv.current.Format})
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}
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func (sv headerValidations) SetDefault(val interface{}) { sv.current.Default = val }
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func (sv headerValidations) SetExample(val interface{}) { sv.current.Example = val }
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type responseBuilder struct {
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ctx *scanCtx
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decl *entityDecl
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postDecls []*entityDecl
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}
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func (r *responseBuilder) Build(responses map[string]spec.Response) error {
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// check if there is a swagger:response tag that is followed by one or more words,
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// these words are the ids of the operations this parameter struct applies to
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// once type name is found convert it to a schema, by looking up the schema in the
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// parameters dictionary that got passed into this parse method
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name, _ := r.decl.ResponseNames()
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response := responses[name]
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debugLog("building response: %s", name)
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// analyze doc comment for the model
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sp := new(sectionedParser)
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sp.setDescription = func(lines []string) { response.Description = joinDropLast(lines) }
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if err := sp.Parse(r.decl.Comments); err != nil {
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return err
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}
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// analyze struct body for fields etc
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// each exported struct field:
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// * gets a type mapped to a go primitive
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// * perhaps gets a format
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// * has to document the validations that apply for the type and the field
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// * when the struct field points to a model it becomes a ref: #/definitions/ModelName
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// * comments that aren't tags is used as the description
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if err := r.buildFromType(r.decl.Type, &response, make(map[string]bool)); err != nil {
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return err
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}
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responses[name] = response
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return nil
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}
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func (r *responseBuilder) buildFromField(fld *types.Var, tpe types.Type, typable swaggerTypable, seen map[string]bool) error {
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debugLog("build from field %s: %T", fld.Name(), tpe)
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switch ftpe := tpe.(type) {
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case *types.Basic:
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return swaggerSchemaForType(ftpe.Name(), typable)
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case *types.Struct:
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sb := schemaBuilder{
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decl: r.decl,
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ctx: r.ctx,
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}
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if err := sb.buildFromType(tpe, typable); err != nil {
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return err
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}
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r.postDecls = append(r.postDecls, sb.postDecls...)
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return nil
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case *types.Pointer:
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return r.buildFromField(fld, ftpe.Elem(), typable, seen)
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case *types.Interface:
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sb := schemaBuilder{
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decl: r.decl,
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ctx: r.ctx,
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}
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if err := sb.buildFromType(tpe, typable); err != nil {
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return err
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}
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r.postDecls = append(r.postDecls, sb.postDecls...)
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return nil
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case *types.Array:
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return r.buildFromField(fld, ftpe.Elem(), typable.Items(), seen)
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case *types.Slice:
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return r.buildFromField(fld, ftpe.Elem(), typable.Items(), seen)
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case *types.Map:
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schema := new(spec.Schema)
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typable.Schema().Typed("object", "").AdditionalProperties = &spec.SchemaOrBool{
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Schema: schema,
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}
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sb := schemaBuilder{
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decl: r.decl,
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ctx: r.ctx,
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}
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if err := sb.buildFromType(ftpe.Elem(), schemaTypable{schema, typable.Level() + 1}); err != nil {
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return err
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}
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return nil
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case *types.Named:
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if decl, found := r.ctx.DeclForType(ftpe.Obj().Type()); found {
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if decl.Type.Obj().Pkg().Path() == "time" && decl.Type.Obj().Name() == "Time" {
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typable.Typed("string", "date-time")
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return nil
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}
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if sfnm, isf := strfmtName(decl.Comments); isf {
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typable.Typed("string", sfnm)
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return nil
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}
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sb := &schemaBuilder{ctx: r.ctx, decl: decl}
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sb.inferNames()
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if err := sb.buildFromType(decl.Type, typable); err != nil {
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return err
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}
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r.postDecls = append(r.postDecls, sb.postDecls...)
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return nil
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}
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return errors.Errorf("unable to find package and source file for: %s", ftpe.String())
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default:
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return errors.Errorf("unknown type for %s: %T", fld.String(), fld.Type())
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}
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}
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func (r *responseBuilder) buildFromType(otpe types.Type, resp *spec.Response, seen map[string]bool) error {
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switch tpe := otpe.(type) {
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case *types.Pointer:
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return r.buildFromType(tpe.Elem(), resp, seen)
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case *types.Named:
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o := tpe.Obj()
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switch stpe := o.Type().Underlying().(type) {
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case *types.Struct:
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debugLog("build from type %s: %T", tpe.Obj().Name(), otpe)
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if decl, found := r.ctx.DeclForType(o.Type()); found {
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return r.buildFromStruct(decl, stpe, resp, seen)
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}
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return r.buildFromStruct(r.decl, stpe, resp, seen)
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default:
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if decl, found := r.ctx.DeclForType(o.Type()); found {
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var schema spec.Schema
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typable := schemaTypable{schema: &schema, level: 0}
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if decl.Type.Obj().Pkg().Path() == "time" && decl.Type.Obj().Name() == "Time" {
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typable.Typed("string", "date-time")
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return nil
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}
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if sfnm, isf := strfmtName(decl.Comments); isf {
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typable.Typed("string", sfnm)
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return nil
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}
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sb := &schemaBuilder{ctx: r.ctx, decl: decl}
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sb.inferNames()
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if err := sb.buildFromType(tpe.Underlying(), typable); err != nil {
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return err
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}
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resp.WithSchema(&schema)
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r.postDecls = append(r.postDecls, sb.postDecls...)
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return nil
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}
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return errors.Errorf("responses can only be structs, did you mean for %s to be the response body?", otpe.String())
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}
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default:
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return errors.New("anonymous types are currently not supported for responses")
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}
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}
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func (r *responseBuilder) buildFromStruct(decl *entityDecl, tpe *types.Struct, resp *spec.Response, seen map[string]bool) error {
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if tpe.NumFields() == 0 {
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return nil
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}
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for i := 0; i < tpe.NumFields(); i++ {
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fld := tpe.Field(i)
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if fld.Embedded() {
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if err := r.buildFromType(fld.Type(), resp, seen); err != nil {
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return err
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}
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continue
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}
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if fld.Anonymous() {
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debugLog("skipping anonymous field")
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continue
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}
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tg := tpe.Tag(i)
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var afld *ast.Field
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ans, _ := astutil.PathEnclosingInterval(decl.File, fld.Pos(), fld.Pos())
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for _, an := range ans {
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at, valid := an.(*ast.Field)
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if !valid {
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continue
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}
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debugLog("field %s: %s(%T) [%q] ==> %s", fld.Name(), fld.Type().String(), fld.Type(), tg, at.Doc.Text())
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afld = at
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break
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}
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if afld == nil {
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debugLog("can't find source associated with %s for %s", fld.String(), tpe.String())
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continue
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}
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// if the field is annotated with swagger:ignore, ignore it
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if ignored(afld.Doc) {
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continue
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}
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name, ignore, _, err := parseJSONTag(afld)
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if err != nil {
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return err
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}
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if ignore {
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continue
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}
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var in string
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// scan for param location first, this changes some behavior down the line
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if afld.Doc != nil {
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for _, cmt := range afld.Doc.List {
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for _, line := range strings.Split(cmt.Text, "\n") {
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matches := rxIn.FindStringSubmatch(line)
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if len(matches) > 0 && len(strings.TrimSpace(matches[1])) > 0 {
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in = strings.TrimSpace(matches[1])
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}
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}
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}
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}
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ps := resp.Headers[name]
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// support swagger:file for response
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// An API operation can return a file, such as an image or PDF. In this case,
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// define the response schema with type: file and specify the appropriate MIME types in the produces section.
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if afld.Doc != nil && fileParam(afld.Doc) {
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resp.Schema = &spec.Schema{}
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resp.Schema.Typed("file", "")
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} else if err := r.buildFromField(fld, fld.Type(), responseTypable{in, &ps, resp}, seen); err != nil {
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return err
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}
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if strfmtName, ok := strfmtName(afld.Doc); ok {
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ps.Typed("string", strfmtName)
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}
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sp := new(sectionedParser)
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sp.setDescription = func(lines []string) { ps.Description = joinDropLast(lines) }
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sp.taggers = []tagParser{
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newSingleLineTagParser("maximum", &setMaximum{headerValidations{&ps}, rxf(rxMaximumFmt, "")}),
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newSingleLineTagParser("minimum", &setMinimum{headerValidations{&ps}, rxf(rxMinimumFmt, "")}),
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newSingleLineTagParser("multipleOf", &setMultipleOf{headerValidations{&ps}, rxf(rxMultipleOfFmt, "")}),
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newSingleLineTagParser("minLength", &setMinLength{headerValidations{&ps}, rxf(rxMinLengthFmt, "")}),
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newSingleLineTagParser("maxLength", &setMaxLength{headerValidations{&ps}, rxf(rxMaxLengthFmt, "")}),
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newSingleLineTagParser("pattern", &setPattern{headerValidations{&ps}, rxf(rxPatternFmt, "")}),
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newSingleLineTagParser("collectionFormat", &setCollectionFormat{headerValidations{&ps}, rxf(rxCollectionFormatFmt, "")}),
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newSingleLineTagParser("minItems", &setMinItems{headerValidations{&ps}, rxf(rxMinItemsFmt, "")}),
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newSingleLineTagParser("maxItems", &setMaxItems{headerValidations{&ps}, rxf(rxMaxItemsFmt, "")}),
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newSingleLineTagParser("unique", &setUnique{headerValidations{&ps}, rxf(rxUniqueFmt, "")}),
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newSingleLineTagParser("enum", &setEnum{headerValidations{&ps}, rxf(rxEnumFmt, "")}),
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newSingleLineTagParser("default", &setDefault{&ps.SimpleSchema, headerValidations{&ps}, rxf(rxDefaultFmt, "")}),
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newSingleLineTagParser("example", &setExample{&ps.SimpleSchema, headerValidations{&ps}, rxf(rxExampleFmt, "")}),
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}
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itemsTaggers := func(items *spec.Items, level int) []tagParser {
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// the expression is 1-index based not 0-index
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itemsPrefix := fmt.Sprintf(rxItemsPrefixFmt, level+1)
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return []tagParser{
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newSingleLineTagParser(fmt.Sprintf("items%dMaximum", level), &setMaximum{itemsValidations{items}, rxf(rxMaximumFmt, itemsPrefix)}),
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newSingleLineTagParser(fmt.Sprintf("items%dMinimum", level), &setMinimum{itemsValidations{items}, rxf(rxMinimumFmt, itemsPrefix)}),
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newSingleLineTagParser(fmt.Sprintf("items%dMultipleOf", level), &setMultipleOf{itemsValidations{items}, rxf(rxMultipleOfFmt, itemsPrefix)}),
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newSingleLineTagParser(fmt.Sprintf("items%dMinLength", level), &setMinLength{itemsValidations{items}, rxf(rxMinLengthFmt, itemsPrefix)}),
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newSingleLineTagParser(fmt.Sprintf("items%dMaxLength", level), &setMaxLength{itemsValidations{items}, rxf(rxMaxLengthFmt, itemsPrefix)}),
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newSingleLineTagParser(fmt.Sprintf("items%dPattern", level), &setPattern{itemsValidations{items}, rxf(rxPatternFmt, itemsPrefix)}),
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newSingleLineTagParser(fmt.Sprintf("items%dCollectionFormat", level), &setCollectionFormat{itemsValidations{items}, rxf(rxCollectionFormatFmt, itemsPrefix)}),
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newSingleLineTagParser(fmt.Sprintf("items%dMinItems", level), &setMinItems{itemsValidations{items}, rxf(rxMinItemsFmt, itemsPrefix)}),
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newSingleLineTagParser(fmt.Sprintf("items%dMaxItems", level), &setMaxItems{itemsValidations{items}, rxf(rxMaxItemsFmt, itemsPrefix)}),
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newSingleLineTagParser(fmt.Sprintf("items%dUnique", level), &setUnique{itemsValidations{items}, rxf(rxUniqueFmt, itemsPrefix)}),
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newSingleLineTagParser(fmt.Sprintf("items%dEnum", level), &setEnum{itemsValidations{items}, rxf(rxEnumFmt, itemsPrefix)}),
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newSingleLineTagParser(fmt.Sprintf("items%dDefault", level), &setDefault{&items.SimpleSchema, itemsValidations{items}, rxf(rxDefaultFmt, itemsPrefix)}),
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newSingleLineTagParser(fmt.Sprintf("items%dExample", level), &setExample{&items.SimpleSchema, itemsValidations{items}, rxf(rxExampleFmt, itemsPrefix)}),
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}
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}
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var parseArrayTypes func(expr ast.Expr, items *spec.Items, level int) ([]tagParser, error)
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parseArrayTypes = func(expr ast.Expr, items *spec.Items, level int) ([]tagParser, error) {
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if items == nil {
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return []tagParser{}, nil
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}
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switch iftpe := expr.(type) {
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case *ast.ArrayType:
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eleTaggers := itemsTaggers(items, level)
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sp.taggers = append(eleTaggers, sp.taggers...)
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otherTaggers, err := parseArrayTypes(iftpe.Elt, items.Items, level+1)
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if err != nil {
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return nil, err
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}
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return otherTaggers, nil
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case *ast.Ident:
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taggers := []tagParser{}
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if iftpe.Obj == nil {
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taggers = itemsTaggers(items, level)
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}
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otherTaggers, err := parseArrayTypes(expr, items.Items, level+1)
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if err != nil {
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return nil, err
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}
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return append(taggers, otherTaggers...), nil
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case *ast.StarExpr:
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otherTaggers, err := parseArrayTypes(iftpe.X, items, level)
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if err != nil {
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return nil, err
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}
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return otherTaggers, nil
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default:
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return nil, fmt.Errorf("unknown field type ele for %q", name)
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}
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}
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// check if this is a primitive, if so parse the validations from the
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// doc comments of the slice declaration.
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if ftped, ok := afld.Type.(*ast.ArrayType); ok {
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taggers, err := parseArrayTypes(ftped.Elt, ps.Items, 0)
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if err != nil {
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return err
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}
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sp.taggers = append(taggers, sp.taggers...)
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}
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if err := sp.Parse(afld.Doc); err != nil {
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return err
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}
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if in != "body" {
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seen[name] = true
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if resp.Headers == nil {
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resp.Headers = make(map[string]spec.Header)
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}
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resp.Headers[name] = ps
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}
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}
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for k := range resp.Headers {
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if !seen[k] {
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delete(resp.Headers, k)
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}
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}
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return nil
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}
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