Creating a repo from a template repo via API (#15958)

* Creating a repo from a template repo via API

fix #15934
ref:
https://docs.github.com/en/rest/reference/repos#create-a-repository-using-a-template

Signed-off-by: a1012112796 <1012112796@qq.com>

3 files changed, 112 insertions, 0 deletions

diff --git a/routers/api/v1/api.go b/routers/api/v1/api.go
index b6913ea1bc..b4f14bf2d1 100644
--- a/routers/api/v1/api.go
+++ b/routers/api/v1/api.go
@@ -722,6 +722,7 @@ func Routes() *web.Route {
 				m.Combo("").Get(reqAnyRepoReader(), repo.Get).
 					Delete(reqToken(), reqOwner(), repo.Delete).
 					Patch(reqToken(), reqAdmin(), bind(api.EditRepoOption{}), repo.Edit)
+				m.Post("/generate", reqToken(), reqRepoReader(models.UnitTypeCode), bind(api.GenerateRepoOption{}), repo.Generate)
 				m.Post("/transfer", reqOwner(), bind(api.TransferRepoOption{}), repo.Transfer)
 				m.Combo("/notifications").
 					Get(reqToken(), notify.ListRepoNotifications).
diff --git a/routers/api/v1/repo/repo.go b/routers/api/v1/repo/repo.go
index 35d3490510..5d397191a6 100644
--- a/routers/api/v1/repo/repo.go
+++ b/routers/api/v1/repo/repo.go
@@ -307,6 +307,115 @@ func Create(ctx *context.APIContext) {
 	CreateUserRepo(ctx, ctx.User, *opt)
 }
 
+// Generate Create a repository using a template
+func Generate(ctx *context.APIContext) {
+	// swagger:operation POST /repos/{template_owner}/{template_repo}/generate repository generateRepo
+	// ---
+	// summary: Create a repository using a template
+	// consumes:
+	// - application/json
+	// produces:
+	// - application/json
+	// parameters:
+	// - name: template_owner
+	//   in: path
+	//   description: name of the template repository owner
+	//   type: string
+	//   required: true
+	// - name: template_repo
+	//   in: path
+	//   description: name of the template repository
+	//   type: string
+	//   required: true
+	// - name: body
+	//   in: body
+	//   schema:
+	//     "$ref": "#/definitions/GenerateRepoOption"
+	// responses:
+	//   "201":
+	//     "$ref": "#/responses/Repository"
+	//   "403":
+	//     "$ref": "#/responses/forbidden"
+	//   "404":
+	//     "$ref": "#/responses/notFound"
+	//   "409":
+	//     description: The repository with the same name already exists.
+	//   "422":
+	//     "$ref": "#/responses/validationError"
+	form := web.GetForm(ctx).(*api.GenerateRepoOption)
+
+	if !ctx.Repo.Repository.IsTemplate {
+		ctx.Error(http.StatusUnprocessableEntity, "", "this is not a template repo")
+		return
+	}
+
+	if ctx.User.IsOrganization() {
+		ctx.Error(http.StatusUnprocessableEntity, "", "not allowed creating repository for organization")
+		return
+	}
+
+	opts := models.GenerateRepoOptions{
+		Name:        form.Name,
+		Description: form.Description,
+		Private:     form.Private,
+		GitContent:  form.GitContent,
+		Topics:      form.Topics,
+		GitHooks:    form.GitHooks,
+		Webhooks:    form.Webhooks,
+		Avatar:      form.Avatar,
+		IssueLabels: form.Labels,
+	}
+
+	if !opts.IsValid() {
+		ctx.Error(http.StatusUnprocessableEntity, "", "must select at least one template item")
+		return
+	}
+
+	ctxUser := ctx.User
+	var err error
+	if form.Owner != ctxUser.Name {
+		ctxUser, err = models.GetOrgByName(form.Owner)
+		if err != nil {
+			if models.IsErrOrgNotExist(err) {
+				ctx.JSON(http.StatusNotFound, map[string]interface{}{
+					"error": "request owner `" + form.Name + "` is not exist",
+				})
+				return
+			}
+
+			ctx.Error(http.StatusInternalServerError, "GetOrgByName", err)
+			return
+		}
+
+		if !ctx.User.IsAdmin {
+			canCreate, err := ctxUser.CanCreateOrgRepo(ctx.User.ID)
+			if err != nil {
+				ctx.ServerError("CanCreateOrgRepo", err)
+				return
+			} else if !canCreate {
+				ctx.Error(http.StatusForbidden, "", "Given user is not allowed to create repository in organization.")
+				return
+			}
+		}
+	}
+
+	repo, err := repo_service.GenerateRepository(ctx.User, ctxUser, ctx.Repo.Repository, opts)
+	if err != nil {
+		if models.IsErrRepoAlreadyExist(err) {
+			ctx.Error(http.StatusConflict, "", "The repository with the same name already exists.")
+		} else if models.IsErrNameReserved(err) ||
+			models.IsErrNamePatternNotAllowed(err) {
+			ctx.Error(http.StatusUnprocessableEntity, "", err)
+		} else {
+			ctx.Error(http.StatusInternalServerError, "CreateRepository", err)
+		}
+		return
+	}
+	log.Trace("Repository generated [%d]: %s/%s", repo.ID, ctxUser.Name, repo.Name)
+
+	ctx.JSON(http.StatusCreated, convert.ToRepo(repo, models.AccessModeOwner))
+}
+
 // CreateOrgRepoDeprecated create one repository of the organization
 func CreateOrgRepoDeprecated(ctx *context.APIContext) {
 	// swagger:operation POST /org/{org}/repos organization createOrgRepoDeprecated
diff --git a/routers/api/v1/swagger/options.go b/routers/api/v1/swagger/options.go
index b5f34e86a3..0ae96a9203 100644
--- a/routers/api/v1/swagger/options.go
+++ b/routers/api/v1/swagger/options.go
@@ -87,6 +87,8 @@ type swaggerParameterBodies struct {
 	TransferRepoOption api.TransferRepoOption
 	// in:body
 	CreateForkOption api.CreateForkOption
+	// in:body
+	GenerateRepoOption api.GenerateRepoOption
 
 	// in:body
 	CreateStatusOption api.CreateStatusOption