Golang APIVersionDefinition.IterateResources方法代碼示例

// generateControllers iterates through the version resources and generates the low level
// controllers.
func (g *Generator) generateControllers(verdir string, version *design.APIVersionDefinition) error {
	ctlFile := filepath.Join(verdir, "controllers.go")
	ctlWr, err := NewControllersWriter(ctlFile)
	if err != nil {
		panic(err) // bug
	}
	title := fmt.Sprintf("%s: Application Controllers", version.Context())
	imports := []*codegen.ImportSpec{
		codegen.SimpleImport("github.com/julienschmidt/httprouter"),
		codegen.SimpleImport("github.com/raphael/goa"),
	}
	if !version.IsDefault() {
		appPkg, err := AppPackagePath()
		if err != nil {
			return err
		}
		imports = append(imports, codegen.SimpleImport(appPkg))
	}
	ctlWr.WriteHeader(title, packageName(version), imports)
	var controllersData []*ControllerTemplateData
	version.IterateResources(func(r *design.ResourceDefinition) error {
		if !r.SupportsVersion(version.Version) {
			return nil
		}
		data := &ControllerTemplateData{Resource: codegen.Goify(r.Name, true)}
		err := r.IterateActions(func(a *design.ActionDefinition) error {
			context := fmt.Sprintf("%s%sContext", codegen.Goify(a.Name, true), codegen.Goify(r.Name, true))
			unmarshal := fmt.Sprintf("unmarshal%s%sPayload", codegen.Goify(a.Name, true), codegen.Goify(r.Name, true))
			action := map[string]interface{}{
				"Name":      codegen.Goify(a.Name, true),
				"Routes":    a.Routes,
				"Context":   context,
				"Unmarshal": unmarshal,
				"Payload":   a.Payload,
			}
			data.Actions = append(data.Actions, action)
			return nil
		})
		if err != nil {
			return err
		}
		if len(data.Actions) > 0 {
			data.Version = version
			controllersData = append(controllersData, data)
		}
		return nil
	})
	g.genfiles = append(g.genfiles, ctlFile)
	if err = ctlWr.Execute(controllersData); err != nil {
		return err
	}
	return ctlWr.FormatCode()
}

// generateContexts iterates through the version resources and actions and generates the action
// contexts.
func (g *Generator) generateContexts(verdir string, api *design.APIDefinition, version *design.APIVersionDefinition) error {
	ctxFile := filepath.Join(verdir, "contexts.go")
	ctxWr, err := NewContextsWriter(ctxFile)
	if err != nil {
		panic(err) // bug
	}
	title := fmt.Sprintf("%s: Application Contexts", version.Context())
	imports := []*codegen.ImportSpec{
		codegen.SimpleImport("fmt"),
		codegen.SimpleImport("strconv"),
		codegen.SimpleImport("github.com/raphael/goa"),
	}
	if !version.IsDefault() {
		appPkg, err := AppPackagePath()
		if err != nil {
			return err
		}
		imports = append(imports, codegen.SimpleImport(filepath.ToSlash(appPkg)))
	}
	ctxWr.WriteHeader(title, packageName(version), imports)
	var appPackage string
	if !version.IsDefault() {
		appPackage = TargetPackage
	}
	err = version.IterateResources(func(r *design.ResourceDefinition) error {
		if !r.SupportsVersion(version.Version) {
			return nil
		}
		return r.IterateActions(func(a *design.ActionDefinition) error {
			ctxName := codegen.Goify(a.Name, true) + codegen.Goify(a.Parent.Name, true) + "Context"
			ctxData := ContextTemplateData{
				Name:         ctxName,
				ResourceName: r.Name,
				ActionName:   a.Name,
				Payload:      a.Payload,
				Params:       a.AllParams(),
				Headers:      r.Headers.Merge(a.Headers),
				Routes:       a.Routes,
				Responses:    MergeResponses(r.Responses, a.Responses),
				API:          api,
				Version:      version,
				AppPackage:   appPackage,
			}
			return ctxWr.Execute(&ctxData)
		})
	})
	g.genfiles = append(g.genfiles, ctxFile)
	if err != nil {
		return err
	}
	return ctxWr.FormatCode()
}

// generateHrefs iterates through the version resources and generates the href factory methods.
func (g *Generator) generateHrefs(verdir string, version *design.APIVersionDefinition) error {
	hrefFile := filepath.Join(verdir, "hrefs.go")
	resWr, err := NewResourcesWriter(hrefFile)
	if err != nil {
		panic(err) // bug
	}
	title := fmt.Sprintf("%s: Application Resource Href Factories", version.Context())
	resWr.WriteHeader(title, packageName(version), nil)
	err = version.IterateResources(func(r *design.ResourceDefinition) error {
		if !r.SupportsVersion(version.Version) {
			return nil
		}
		m := design.Design.MediaTypeWithIdentifier(r.MediaType)
		var identifier string
		if m != nil {
			identifier = m.Identifier
		} else {
			identifier = "plain/text"
		}
		canoTemplate := r.URITemplate(version)
		canoTemplate = design.WildcardRegex.ReplaceAllLiteralString(canoTemplate, "/%v")
		var canoParams []string
		if ca := r.CanonicalAction(); ca != nil {
			if len(ca.Routes) > 0 {
				canoParams = ca.Routes[0].Params(version)
			}
		}

		data := ResourceData{
			Name:              codegen.Goify(r.Name, true),
			Identifier:        identifier,
			Description:       r.Description,
			Type:              m,
			CanonicalTemplate: canoTemplate,
			CanonicalParams:   canoParams,
		}
		return resWr.Execute(&data)
	})
	g.genfiles = append(g.genfiles, hrefFile)
	if err != nil {
		return err
	}
	return resWr.FormatCode()
}