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

2 files changed, 48 insertions, 0 deletions

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 {