Add API for Label templates (#24602)

This adds API that allows getting the Label templates of the Gitea
Instance

routers/api/v1/api.go

@@ -723,6 +723,8 @@ func Routes(ctx gocontext.Context) *web.Route {
 		m.Get("/gitignore/templates/{name}", misc.GetGitignoreTemplateInfo)
 		m.Get("/licenses", misc.ListLicenseTemplates)
 		m.Get("/licenses/{name}", misc.GetLicenseTemplateInfo)
+		m.Get("/label/templates", misc.ListLabelTemplates)
+		m.Get("/label/templates/{name}", misc.GetLabelTemplate)
 		m.Group("/settings", func() {
 			m.Get("/ui", settings.GetGeneralUISettings)
 			m.Get("/api", settings.GetGeneralAPISettings)

routers/api/v1/misc/label_templates.go

@@ -0,0 +1,60 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package misc
+
+import (
+	"net/http"
+
+	"code.gitea.io/gitea/modules/context"
+	repo_module "code.gitea.io/gitea/modules/repository"
+	"code.gitea.io/gitea/modules/util"
+	"code.gitea.io/gitea/services/convert"
+)
+
+// Shows a list of all Label templates
+func ListLabelTemplates(ctx *context.APIContext) {
+	// swagger:operation GET /label/templates miscellaneous listLabelTemplates
+	// ---
+	// summary: Returns a list of all label templates
+	// produces:
+	// - application/json
+	// responses:
+	//   "200":
+	//     "$ref": "#/responses/LabelTemplateList"
+	result := make([]string, len(repo_module.LabelTemplateFiles))
+	for i := range repo_module.LabelTemplateFiles {
+		result[i] = repo_module.LabelTemplateFiles[i].DisplayName
+	}
+
+	ctx.JSON(http.StatusOK, result)
+}
+
+// Shows all labels in a template
+func GetLabelTemplate(ctx *context.APIContext) {
+	// swagger:operation GET /label/templates/{name} miscellaneous getLabelTemplateInfo
+	// ---
+	// summary: Returns all labels in a template
+	// produces:
+	// - application/json
+	// parameters:
+	// - name: name
+	//   in: path
+	//   description: name of the template
+	//   type: string
+	//   required: true
+	// responses:
+	//   "200":
+	//     "$ref": "#/responses/LabelTemplateInfo"
+	//   "404":
+	//     "$ref": "#/responses/notFound"
+	name := util.PathJoinRelX(ctx.Params("name"))
+
+	labels, err := repo_module.LoadTemplateLabelsByDisplayName(name)
+	if err != nil {
+		ctx.NotFound()
+		return
+	}
+
+	ctx.JSON(http.StatusOK, convert.ToLabelTemplateList(labels))
+}

routers/api/v1/swagger/misc.go

@@ -48,3 +48,17 @@ type swaggerResponseStringSlice struct {
 	// in:body
 	Body []string `json:"body"`
 }
+
+// LabelTemplateList
+// swagger:response LabelTemplateList
+type swaggerResponseLabelTemplateList struct {
+	// in:body
+	Body []string `json:"body"`
+}
+
+// LabelTemplateInfo
+// swagger:response LabelTemplateInfo
+type swaggerResponseLabelTemplateInfo struct {
+	// in:body
+	Body []api.LabelTemplate `json:"body"`
+}