From a3e85f5929027f3a3e2698729d963418b691be2a Mon Sep 17 00:00:00 2001
From: Ethan Koenig <ethantkoenig@gmail.com>
Date: Mon, 31 Oct 2016 23:20:43 -0400
Subject: [PATCH] API Endpoint for watching

---
 models/user.go               | 15 +++++++
 routers/api/v1/api.go        | 11 ++++++
 routers/api/v1/user/watch.go | 76 ++++++++++++++++++++++++++++++++++++
 3 files changed, 102 insertions(+)
 create mode 100644 routers/api/v1/user/watch.go

diff --git a/models/user.go b/models/user.go
index e8c5c91680912..c80faae8213a5 100644
--- a/models/user.go
+++ b/models/user.go
@@ -1194,3 +1194,18 @@ func GetStarredRepos(userID int64, private bool) ([]*Repository, error) {
 	}
 	return repos, nil
 }
+
+// GetWatchedRepos returns the repos watched by a particular user
+func GetWatchedRepos(userID int64, private bool) ([]*Repository, error) {
+	sess := x.Where("watch.user_id=?", userID).
+		Join("LEFT", "watch", "`repository`.id=`watch`.repo_id")
+	if !private {
+		sess = sess.And("is_private=?", false)
+	}
+	repos := make([]*Repository, 0, 10)
+	err := sess.Find(&repos)
+	if err != nil {
+		return nil, err
+	}
+	return repos, nil
+}
diff --git a/routers/api/v1/api.go b/routers/api/v1/api.go
index 95bdfd072e6d3..7888fbe40b42a 100644
--- a/routers/api/v1/api.go
+++ b/routers/api/v1/api.go
@@ -202,6 +202,8 @@ func RegisterRoutes(m *macaron.Macaron) {
 				})
 
 				m.Get("/starred", user.GetStarredRepos)
+
+				m.Get("/subscriptions", user.GetWatchedRepos)
 			})
 		}, reqToken())
 
@@ -232,6 +234,15 @@ func RegisterRoutes(m *macaron.Macaron) {
 					m.Delete("", user.Unstar)
 				}, context.ExtractOwnerAndRepo())
 			})
+
+			m.Group("/subscriptions", func() {
+				m.Get("", user.GetMyWatchedRepos)
+				m.Group("/:username/:reponame", func() {
+					m.Get("", user.IsWatching)
+					m.Put("", user.Watch)
+					m.Delete("", user.Unwatch)
+				}, context.ExtractOwnerAndRepo())
+			})
 		}, reqToken())
 
 		// Repositories
diff --git a/routers/api/v1/user/watch.go b/routers/api/v1/user/watch.go
new file mode 100644
index 0000000000000..ee3da0305af78
--- /dev/null
+++ b/routers/api/v1/user/watch.go
@@ -0,0 +1,76 @@
+// Copyright 2016 The Gogs 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 user
+
+import (
+	api "code.gitea.io/sdk/gitea"
+
+	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/models"
+)
+
+// getWatchedRepos returns the repos that the user with the specified userID is
+// watching
+func getWatchedRepos(userID int64, private bool) ([]*api.Repository, error) {
+    watchedRepos, err := models.GetWatchedRepos(userID, private)
+	if err != nil {
+		return nil, err
+	}
+	repos := make([]*api.Repository, len(watchedRepos))
+	for i, watched := range watchedRepos {
+		repos[i] = watched.APIFormat(&api.Permission{true, true, true})
+	}
+	return repos, nil
+}
+
+// GetWatchedRepos returns the repos that the user specified in ctx is watching
+func GetWatchedRepos(ctx *context.APIContext) {
+	user := GetUserByParams(ctx)
+	private := user.ID == ctx.User.ID
+	repos, err := getWatchedRepos(user.ID, private)
+	if err != nil {
+		ctx.Error(500, "getWatchedRepos", err)
+	}
+	ctx.JSON(200, &repos)
+}
+
+// GetMyWatchedRepos returns the repos that the authenticated user is watching
+func GetMyWatchedRepos(ctx *context.APIContext) {
+	repos, err := getWatchedRepos(ctx.User.ID, true)
+	if err != nil {
+		ctx.Error(500, "getWatchedRepos", err)
+	}
+	ctx.JSON(200, &repos)
+}
+
+// IsWatching returns whether the authenticated user is watching the repo
+// specified in ctx
+func IsWatching(ctx *context.APIContext) {
+	if models.IsWatching(ctx.User.ID, ctx.Repo.Repository.ID) {
+		ctx.Status(204)
+	} else {
+		ctx.Status(404)
+	}
+}
+
+// Watch the repo specified in ctx, as the authenticated user
+func Watch(ctx *context.APIContext) {
+	err := models.WatchRepo(ctx.User.ID, ctx.Repo.Repository.ID, true)
+	if err != nil {
+		ctx.Status(500)
+		return
+	}
+	ctx.Status(204)
+}
+
+// Unwatch the repo specified in ctx, as the authenticated user
+func Unwatch(ctx *context.APIContext) {
+	err := models.WatchRepo(ctx.User.ID, ctx.Repo.Repository.ID, false)
+	if err != nil {
+		ctx.Status(500)
+		return
+	}
+	ctx.Status(204)
+}