Add API for Label templates (#24602)

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

7 files changed, 258 insertions, 0 deletions

diff --git a/modules/structs/issue_label.go b/modules/structs/issue_label.go
index 5bb6cc3b84..2610d3e93f 100644
--- a/modules/structs/issue_label.go
+++ b/modules/structs/issue_label.go
@@ -44,3 +44,13 @@ type IssueLabelsOption struct {
 	// list of label IDs
 	Labels []int64 `json:"labels"`
 }
+
+// LabelTemplate info of a Label template
+type LabelTemplate struct {
+	Name string `json:"name"`
+	// example: false
+	Exclusive bool `json:"exclusive"`
+	// example: 00aabb
+	Color       string `json:"color"`
+	Description string `json:"description"`
+}
diff --git a/routers/api/v1/api.go b/routers/api/v1/api.go
index f1e1cf946a..53c58c4b9b 100644
--- a/routers/api/v1/api.go
+++ b/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)
diff --git a/routers/api/v1/misc/label_templates.go b/routers/api/v1/misc/label_templates.go
new file mode 100644
index 0000000000..0e0ca39fc5
--- /dev/null
+++ b/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))
+}
diff --git a/routers/api/v1/swagger/misc.go b/routers/api/v1/swagger/misc.go
index 5778b659b5..df8a813dfb 100644
--- a/routers/api/v1/swagger/misc.go
+++ b/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"`
+}
diff --git a/services/convert/issue.go b/services/convert/issue.go
index 6d31a123bd..3d1b21c6bf 100644
--- a/services/convert/issue.go
+++ b/services/convert/issue.go
@@ -13,6 +13,7 @@ import (
 	issues_model "code.gitea.io/gitea/models/issues"
 	repo_model "code.gitea.io/gitea/models/repo"
 	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/label"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/setting"
 	api "code.gitea.io/gitea/modules/structs"
@@ -238,3 +239,24 @@ func ToAPIMilestone(m *issues_model.Milestone) *api.Milestone {
 	}
 	return apiMilestone
 }
+
+// ToLabelTemplate converts Label to API format
+func ToLabelTemplate(label *label.Label) *api.LabelTemplate {
+	result := &api.LabelTemplate{
+		Name:        label.Name,
+		Exclusive:   label.Exclusive,
+		Color:       strings.TrimLeft(label.Color, "#"),
+		Description: label.Description,
+	}
+
+	return result
+}
+
+// ToLabelTemplateList converts list of Label to API format
+func ToLabelTemplateList(labels []*label.Label) []*api.LabelTemplate {
+	result := make([]*api.LabelTemplate, len(labels))
+	for i := range labels {
+		result[i] = ToLabelTemplate(labels[i])
+	}
+	return result
+}
diff --git a/templates/swagger/v1_json.tmpl b/templates/swagger/v1_json.tmpl
index 3c56fc9efb..15402ecdfd 100644
--- a/templates/swagger/v1_json.tmpl
+++ b/templates/swagger/v1_json.tmpl
@@ -929,6 +929,52 @@
         }
       }
     },
+    "/label/templates": {
+      "get": {
+        "produces": [
+          "application/json"
+        ],
+        "tags": [
+          "miscellaneous"
+        ],
+        "summary": "Returns a list of all label templates",
+        "operationId": "listLabelTemplates",
+        "responses": {
+          "200": {
+            "$ref": "#/responses/LabelTemplateList"
+          }
+        }
+      }
+    },
+    "/label/templates/{name}": {
+      "get": {
+        "produces": [
+          "application/json"
+        ],
+        "tags": [
+          "miscellaneous"
+        ],
+        "summary": "Returns all labels in a template",
+        "operationId": "getLabelTemplateInfo",
+        "parameters": [
+          {
+            "type": "string",
+            "description": "name of the template",
+            "name": "name",
+            "in": "path",
+            "required": true
+          }
+        ],
+        "responses": {
+          "200": {
+            "$ref": "#/responses/LabelTemplateInfo"
+          },
+          "404": {
+            "$ref": "#/responses/notFound"
+          }
+        }
+      }
+    },
     "/licenses": {
       "get": {
         "produces": [
@@ -18858,6 +18904,31 @@
       },
       "x-go-package": "code.gitea.io/gitea/modules/structs"
     },
+    "LabelTemplate": {
+      "description": "LabelTemplate info of a Label template",
+      "type": "object",
+      "properties": {
+        "color": {
+          "type": "string",
+          "x-go-name": "Color",
+          "example": "00aabb"
+        },
+        "description": {
+          "type": "string",
+          "x-go-name": "Description"
+        },
+        "exclusive": {
+          "type": "boolean",
+          "x-go-name": "Exclusive",
+          "example": false
+        },
+        "name": {
+          "type": "string",
+          "x-go-name": "Name"
+        }
+      },
+      "x-go-package": "code.gitea.io/gitea/modules/structs"
+    },
     "LicenseTemplateInfo": {
       "description": "LicensesInfo contains information about a License",
       "type": "object",
@@ -21797,6 +21868,24 @@
         }
       }
     },
+    "LabelTemplateInfo": {
+      "description": "LabelTemplateInfo",
+      "schema": {
+        "type": "array",
+        "items": {
+          "$ref": "#/definitions/LabelTemplate"
+        }
+      }
+    },
+    "LabelTemplateList": {
+      "description": "LabelTemplateList",
+      "schema": {
+        "type": "array",
+        "items": {
+          "type": "string"
+        }
+      }
+    },
     "LanguageStatistics": {
       "description": "LanguageStatistics",
       "schema": {
diff --git a/tests/integration/api_label_templates_test.go b/tests/integration/api_label_templates_test.go
new file mode 100644
index 0000000000..007e979011
--- /dev/null
+++ b/tests/integration/api_label_templates_test.go
@@ -0,0 +1,61 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package integration
+
+import (
+	"fmt"
+	"net/http"
+	"net/url"
+	"strings"
+	"testing"
+
+	repo_module "code.gitea.io/gitea/modules/repository"
+	api "code.gitea.io/gitea/modules/structs"
+	"code.gitea.io/gitea/tests"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestAPIListLabelTemplates(t *testing.T) {
+	defer tests.PrepareTestEnv(t)()
+
+	req := NewRequest(t, "GET", "/api/v1/label/templates")
+	resp := MakeRequest(t, req, http.StatusOK)
+
+	var templateList []string
+	DecodeJSON(t, resp, &templateList)
+
+	for i := range repo_module.LabelTemplateFiles {
+		assert.Equal(t, repo_module.LabelTemplateFiles[i].DisplayName, templateList[i])
+	}
+}
+
+func TestAPIGetLabelTemplateInfo(t *testing.T) {
+	defer tests.PrepareTestEnv(t)()
+
+	// If Gitea has for some reason no Label templates, we need to skip this test
+	if len(repo_module.LabelTemplateFiles) == 0 {
+		return
+	}
+
+	// Use the first template for the test
+	templateName := repo_module.LabelTemplateFiles[0].DisplayName
+
+	urlStr := fmt.Sprintf("/api/v1/label/templates/%s", url.PathEscape(templateName))
+	req := NewRequest(t, "GET", urlStr)
+	resp := MakeRequest(t, req, http.StatusOK)
+
+	var templateInfo []api.LabelTemplate
+	DecodeJSON(t, resp, &templateInfo)
+
+	labels, err := repo_module.LoadTemplateLabelsByDisplayName(templateName)
+	assert.NoError(t, err)
+
+	for i := range labels {
+		assert.Equal(t, strings.TrimLeft(labels[i].Color, "#"), templateInfo[i].Color)
+		assert.Equal(t, labels[i].Description, templateInfo[i].Description)
+		assert.Equal(t, labels[i].Exclusive, templateInfo[i].Exclusive)
+		assert.Equal(t, labels[i].Name, templateInfo[i].Name)
+	}
+}