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command.go
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command.go
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package genrepository
import (
"fmt"
"go/ast"
"go/printer"
"go/token"
"os"
"github.com/mirzaakhena/gogen/command/genentity"
"github.com/mirzaakhena/gogen/utils"
)
// ObjTemplate ...
type ObjTemplate struct {
PackagePath string
RepositoryName string
EntityName string
UsecaseName *string
}
func Run(inputs ...string) error {
if len(inputs) < 2 {
err := fmt.Errorf("\n" +
" # Create a repository and inject the template code into interactor file with '//!' flag\n" +
" gogen repository SaveOrder Order CreateOrder\n" +
" 'SaveOrder' is a repository func name\n" +
" 'Order' is an entity name\n" +
" 'CreateOrder' is an usecase name\n" +
"\n" +
" # Create a repository without inject the template code into usecase\n" +
" gogen repository SaveOrder Order\n" +
" 'SaveOrder' is a repository func name\n" +
" 'Order' is an entity name\n" +
"\n")
return err
}
packagePath := utils.GetPackagePath()
gcfg := utils.GetGogenConfig()
repositoryName := inputs[0]
entityName := inputs[1]
obj := ObjTemplate{
PackagePath: packagePath,
RepositoryName: repositoryName,
EntityName: entityName,
UsecaseName: nil,
}
if len(inputs) >= 3 {
obj.UsecaseName = &inputs[2]
}
fileRenamer := map[string]string{
"domainname": utils.LowerCase(gcfg.Domain),
}
err := genentity.Run(entityName)
if err != nil {
return err
}
err = utils.CreateEverythingExactly("templates/", "repository", fileRenamer, obj, utils.AppTemplates)
if err != nil {
return err
}
// repository.go file is already exist, but is the interface is exist ?
exist, err := isRepoExist(getRepositoryFolder(gcfg.Domain), repositoryName)
if err != nil {
return err
}
if !exist {
// check the prefix and give specific template for it
templateCode, err := getRepoInterfaceTemplate(obj.RepositoryName)
if err != nil {
return err
}
templateHasBeenInjected, err := utils.PrintTemplate(string(templateCode), obj)
if err != nil {
return err
}
dataInBytes, err := injectCodeToRepositoryFile(gcfg.Domain, templateHasBeenInjected)
if err != nil {
return err
}
// reformat interactor.go
err = utils.Reformat(getRepositoryFile(gcfg.Domain), dataInBytes)
if err != nil {
return err
}
}
// no usecase name means no need to inject to outport and interactor
if obj.UsecaseName == nil {
return nil
}
// inject to outport
{
err := injectToOutport(gcfg.Domain, obj)
if err != nil {
return err
}
outportFile := getOutportFile(gcfg.Domain, *obj.UsecaseName)
// reformat outport._go
err = utils.Reformat(outportFile, nil)
if err != nil {
return err
}
}
// inject to interactor
{
// check the prefix and give specific template for it
interactorCode, err := getRepoInjectTemplate(obj.RepositoryName)
if err != nil {
return err
}
templateHasBeenInjected, err := utils.PrintTemplate(string(interactorCode), obj)
if err != nil {
return err
}
interactorFilename := getInteractorFilename(gcfg.Domain, *obj.UsecaseName)
interactorBytes, err := utils.InjectToCode(interactorFilename, templateHasBeenInjected)
if err != nil {
return err
}
// reformat interactor._go
err = utils.Reformat(interactorFilename, interactorBytes)
if err != nil {
return err
}
}
return nil
}
func getOutportFile(domainName, usecaseName string) string {
return fmt.Sprintf("domain_%s/usecase/%s/outport.go", domainName, usecaseName)
}
func injectCodeToRepositoryFile(domainName, repoTemplateCode string) ([]byte, error) {
filename := getRepositoryFile(domainName)
return utils.InjectCodeAtTheEndOfFile(filename, repoTemplateCode)
}
func isRepoExist(repoPath, repoName string) (bool, error) {
fset := token.NewFileSet()
exist := utils.IsExist(fset, repoPath, func(file *ast.File, ts *ast.TypeSpec) bool {
_, ok := ts.Type.(*ast.InterfaceType)
return ok && ts.Name.String() == getRepositoryName(repoName)
})
return exist, nil
}
func getRepositoryName(repoName string) string {
return fmt.Sprintf("%sRepo", repoName)
}
func getRepoInterfaceTemplate(repoName string) ([]byte, error) {
if utils.HasOneOfThisPrefix(repoName, "save", "create", "add", "update") {
return utils.AppTemplates.ReadFile("templates/repository/domain_${domainname}/model/repository/~repository_interface_save._go")
}
if utils.HasOneOfThisPrefix(repoName, "findone", "findfirst", "findlast", "getone") {
return utils.AppTemplates.ReadFile("templates/repository/domain_${domainname}/model/repository/~repository_interface_findone._go")
}
if utils.HasOneOfThisPrefix(repoName, "find", "get") {
return utils.AppTemplates.ReadFile("templates/repository/domain_${domainname}/model/repository/~repository_interface_find._go")
}
if utils.HasOneOfThisPrefix(repoName, "remove", "delete") {
return utils.AppTemplates.ReadFile("templates/repository/domain_${domainname}/model/repository/~repository_interface_remove._go")
}
return utils.AppTemplates.ReadFile("templates/repository/domain_${domainname}/model/repository/~repository_interface._go")
}
// getRepoInjectTemplate ...
func getRepoInjectTemplate(repoName string) ([]byte, error) {
if utils.HasOneOfThisPrefix(repoName, "findone", "findfirst", "findlast", "getone") { //
return utils.AppTemplates.ReadFile("templates/repository/domain_${domainname}/model/repository/~interactor_inject_findone._go")
}
if utils.HasOneOfThisPrefix(repoName, "find", "get") {
return utils.AppTemplates.ReadFile("templates/repository/domain_${domainname}/model/repository/~interactor_inject_find._go")
}
if utils.HasOneOfThisPrefix(repoName, "remove", "delete") {
return utils.AppTemplates.ReadFile("templates/repository/domain_${domainname}/model/repository/~interactor_inject_remove._go")
}
if utils.HasOneOfThisPrefix(repoName, "save", "create", "add", "update") {
return utils.AppTemplates.ReadFile("templates/repository/domain_${domainname}/model/repository/~interactor_inject_save._go")
}
return utils.AppTemplates.ReadFile("templates/repository/domain_${domainname}/model/repository/~interactor_inject._go")
}
// injectToOutport ...
func injectToOutport(domainName string, obj ObjTemplate) error {
fset := token.NewFileSet()
var iFace *ast.InterfaceType
var file *ast.File
rootFolderName := fmt.Sprintf("domain_%s/usecase/%s", domainName, *obj.UsecaseName)
isAlreadyInjectedBefore := utils.IsExist(fset, rootFolderName, func(f *ast.File, ts *ast.TypeSpec) bool {
interfaceType, ok := ts.Type.(*ast.InterfaceType)
if ok && ts.Name.String() == "Outport" {
file = f
iFace = interfaceType
// trace every method to find something line like `repository.SaveOrderRepo`
for _, meth := range iFace.Methods.List {
selType, ok := meth.Type.(*ast.SelectorExpr)
// if interface already injected (SaveOrderRepo) then abort the mission
if ok && selType.Sel.String() == getRepositoryName(obj.RepositoryName) {
return true
}
}
}
return false
})
// if it is already injected, then nothing to do
if isAlreadyInjectedBefore {
return nil
}
if iFace == nil {
return fmt.Errorf("outport struct not found")
}
// we want to inject it now
// add new repository to outport interface
iFace.Methods.List = append(iFace.Methods.List, &ast.Field{
Type: &ast.SelectorExpr{
X: &ast.Ident{
Name: utils.GetPackageName(getRepositoryFolder(domainName)),
},
Sel: &ast.Ident{
Name: getRepositoryName(obj.RepositoryName),
},
},
})
fileReadPath := fset.Position(file.Pos()).Filename
// rewrite the outport
f, err := os.Create(fileReadPath)
if err != nil {
return err
}
if err := printer.Fprint(f, fset, file); err != nil {
return err
}
err = f.Close()
if err != nil {
return err
}
err = utils.Reformat(fileReadPath, nil)
if err != nil {
return err
}
return nil
}
func getRepositoryFolder(domainName string) string {
return fmt.Sprintf("domain_%s/model/repository", domainName)
}
func getRepositoryFile(domainName string) string {
return fmt.Sprintf("%s/repository.go", getRepositoryFolder(domainName))
}
func getInteractorFilename(domainName, usecaseName string) string {
return fmt.Sprintf("domain_%s/usecase/%s/interactor.go", domainName, usecaseName)
}