Add topic support (#3711)

* add topic models and unit tests

* fix comments

* fix comment

* add the UI to show or add topics for a repo

* show topics on repositories list

* fix test

* don't show manage topics link when no permission

* use green basic as topic label

* fix topic label color

* remove trace content

* remove debug function

5 files changed, 98 insertions, 0 deletions

diff --git a/routers/api/v1/api.go b/routers/api/v1/api.go
index 4c454cb6a0..02606bdfd0 100644
--- a/routers/api/v1/api.go
+++ b/routers/api/v1/api.go
@@ -571,5 +571,9 @@ func RegisterRoutes(m *macaron.Macaron) {
 				})
 			})
 		}, reqAdmin())
+
+		m.Group("/topics", func() {
+			m.Get("/search", repo.TopicSearch)
+		})
 	}, context.APIContexter())
 }
diff --git a/routers/api/v1/repo/repo.go b/routers/api/v1/repo/repo.go
index 25ed62fa49..9f64dda61d 100644
--- a/routers/api/v1/repo/repo.go
+++ b/routers/api/v1/repo/repo.go
@@ -501,3 +501,45 @@ func MirrorSync(ctx *context.APIContext) {
 	go models.MirrorQueue.Add(repo.ID)
 	ctx.Status(200)
 }
+
+// TopicSearch search for creating topic
+func TopicSearch(ctx *context.Context) {
+	// swagger:operation GET /topics/search repository topicSearch
+	// ---
+	// summary: search topics via keyword
+	// produces:
+	// - application/json
+	// parameters:
+	// - name: keyword
+	//   in: path
+	//   description: id of the repo to get
+	//   type: integer
+	//   required: true
+	// responses:
+	//   "200":
+	//     "$ref": "#/responses/Repository"
+	if ctx.User == nil {
+		ctx.JSON(403, map[string]interface{}{
+			"message": "Only owners could change the topics.",
+		})
+		return
+	}
+
+	kw := ctx.Query("q")
+
+	topics, err := models.FindTopics(&models.FindTopicOptions{
+		Keyword: kw,
+		Limit:   10,
+	})
+	if err != nil {
+		log.Error(2, "SearchTopics failed: %v", err)
+		ctx.JSON(500, map[string]interface{}{
+			"message": "Search topics failed.",
+		})
+		return
+	}
+
+	ctx.JSON(200, map[string]interface{}{
+		"topics": topics,
+	})
+}
diff --git a/routers/repo/topic.go b/routers/repo/topic.go
new file mode 100644
index 0000000000..90ef0d189c
--- /dev/null
+++ b/routers/repo/topic.go
@@ -0,0 +1,38 @@
+// Copyright 2018 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package repo
+
+import (
+	"strings"
+
+	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/log"
+)
+
+// TopicPost response for creating repository
+func TopicPost(ctx *context.Context) {
+	if ctx.User == nil {
+		ctx.JSON(403, map[string]interface{}{
+			"message": "Only owners could change the topics.",
+		})
+		return
+	}
+
+	topics := strings.Split(ctx.Query("topics"), ",")
+
+	err := models.SaveTopics(ctx.Repo.Repository.ID, topics...)
+	if err != nil {
+		log.Error(2, "SaveTopics failed: %v", err)
+		ctx.JSON(500, map[string]interface{}{
+			"message": "Save topics failed.",
+		})
+		return
+	}
+
+	ctx.JSON(200, map[string]interface{}{
+		"status": "ok",
+	})
+}
diff --git a/routers/repo/view.go b/routers/repo/view.go
index 685dd411d6..ca2ece648f 100644
--- a/routers/repo/view.go
+++ b/routers/repo/view.go
@@ -314,6 +314,16 @@ func renderCode(ctx *context.Context) {
 		treeLink += "/" + ctx.Repo.TreePath
 	}
 
+	// Get Topics of this repo
+	topics, err := models.FindTopics(&models.FindTopicOptions{
+		RepoID: ctx.Repo.Repository.ID,
+	})
+	if err != nil {
+		ctx.ServerError("models.FindTopics", err)
+		return
+	}
+	ctx.Data["Topics"] = topics
+
 	// Get current entry user currently looking at.
 	entry, err := ctx.Repo.Commit.GetTreeEntryByPath(ctx.Repo.TreePath)
 	if err != nil {
diff --git a/routers/routes/routes.go b/routers/routes/routes.go
index da7157080a..47a0854e19 100644
--- a/routers/routes/routes.go
+++ b/routers/routes/routes.go
@@ -588,6 +588,10 @@ func RegisterRoutes(m *macaron.Macaron) {
 	}, context.RepoAssignment(), context.UnitTypes(), context.LoadRepoUnits(), context.CheckUnit(models.UnitTypeReleases))
 
 	m.Group("/:username/:reponame", func() {
+		m.Post("/topics", repo.TopicPost)
+	}, context.RepoAssignment(), reqRepoAdmin)
+
+	m.Group("/:username/:reponame", func() {
 		m.Group("", func() {
 			m.Get("/^:type(issues|pulls)$", repo.RetrieveLabels, repo.Issues)
 			m.Get("/^:type(issues|pulls)$/:index", repo.ViewIssue)