[API] Add notification endpoint (#9488)

* [API] Add notification endpoints

 * add func GetNotifications(opts FindNotificationOptions)
 * add func (n *Notification) APIFormat()
 * add func (nl NotificationList) APIFormat()
 * add func (n *Notification) APIURL()
 * add func (nl NotificationList) APIFormat()
 * add LoadAttributes functions (loadRepo, loadIssue, loadComment, loadUser)
 * add func (c *Comment) APIURL()
 * add func (issue *Issue) GetLastComment()
 * add endpoint GET /notifications
 * add endpoint PUT /notifications
 * add endpoint GET /repos/{owner}/{repo}/notifications
 * add endpoint PUT /repos/{owner}/{repo}/notifications
 * add endpoint GET /notifications/threads/{id}
 * add endpoint PATCH /notifications/threads/{id}

* Add TEST

* code format

* code format

7 files changed, 422 insertions, 2 deletions

diff --git a/routers/api/v1/admin/user.go b/routers/api/v1/admin/user.go
index 7387037d33..ebc651516a 100644
--- a/routers/api/v1/admin/user.go
+++ b/routers/api/v1/admin/user.go
@@ -56,10 +56,10 @@ func CreateUser(ctx *context.APIContext, form api.CreateUserOption) {
 	// responses:
 	//   "201":
 	//     "$ref": "#/responses/User"
-	//   "403":
-	//     "$ref": "#/responses/forbidden"
 	//   "400":
 	//     "$ref": "#/responses/error"
+	//   "403":
+	//     "$ref": "#/responses/forbidden"
 	//   "422":
 	//     "$ref": "#/responses/validationError"
 
diff --git a/routers/api/v1/api.go b/routers/api/v1/api.go
index 9f18951893..ccce00e2b2 100644
--- a/routers/api/v1/api.go
+++ b/routers/api/v1/api.go
@@ -70,6 +70,7 @@ import (
 	api "code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/routers/api/v1/admin"
 	"code.gitea.io/gitea/routers/api/v1/misc"
+	"code.gitea.io/gitea/routers/api/v1/notify"
 	"code.gitea.io/gitea/routers/api/v1/org"
 	"code.gitea.io/gitea/routers/api/v1/repo"
 	_ "code.gitea.io/gitea/routers/api/v1/swagger" // for swagger generation
@@ -512,6 +513,16 @@ func RegisterRoutes(m *macaron.Macaron) {
 		m.Post("/markdown", bind(api.MarkdownOption{}), misc.Markdown)
 		m.Post("/markdown/raw", misc.MarkdownRaw)
 
+		// Notifications
+		m.Group("/notifications", func() {
+			m.Combo("").
+				Get(notify.ListNotifications).
+				Put(notify.ReadNotifications)
+			m.Combo("/threads/:id").
+				Get(notify.GetThread).
+				Patch(notify.ReadThread)
+		}, reqToken())
+
 		// Users
 		m.Group("/users", func() {
 			m.Get("/search", user.Search)
@@ -610,6 +621,9 @@ func RegisterRoutes(m *macaron.Macaron) {
 				m.Combo("").Get(reqAnyRepoReader(), repo.Get).
 					Delete(reqToken(), reqOwner(), repo.Delete).
 					Patch(reqToken(), reqAdmin(), bind(api.EditRepoOption{}), context.RepoRef(), repo.Edit)
+				m.Combo("/notifications").
+					Get(reqToken(), notify.ListRepoNotifications).
+					Put(reqToken(), notify.ReadRepoNotifications)
 				m.Group("/hooks", func() {
 					m.Combo("").Get(repo.ListHooks).
 						Post(bind(api.CreateHookOption{}), repo.CreateHook)
diff --git a/routers/api/v1/notify/repo.go b/routers/api/v1/notify/repo.go
new file mode 100644
index 0000000000..b939d90f06
--- /dev/null
+++ b/routers/api/v1/notify/repo.go
@@ -0,0 +1,151 @@
+// Copyright 2020 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 notify
+
+import (
+	"net/http"
+	"strings"
+	"time"
+
+	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/routers/api/v1/utils"
+)
+
+// ListRepoNotifications list users's notification threads on a specific repo
+func ListRepoNotifications(ctx *context.APIContext) {
+	// swagger:operation GET /repos/{owner}/{repo}/notifications notification notifyGetRepoList
+	// ---
+	// summary: List users's notification threads on a specific repo
+	// consumes:
+	// - application/json
+	// produces:
+	// - application/json
+	// parameters:
+	// - name: owner
+	//   in: path
+	//   description: owner of the repo
+	//   type: string
+	//   required: true
+	// - name: repo
+	//   in: path
+	//   description: name of the repo
+	//   type: string
+	//   required: true
+	// - name: all
+	//   in: query
+	//   description: If true, show notifications marked as read. Default value is false
+	//   type: string
+	//   required: false
+	// - name: since
+	//   in: query
+	//   description: Only show notifications updated after the given time. This is a timestamp in RFC 3339 format
+	//   type: string
+	//   format: date-time
+	//   required: false
+	// - name: before
+	//   in: query
+	//   description: Only show notifications updated before the given time. This is a timestamp in RFC 3339 format
+	//   type: string
+	//   format: date-time
+	//   required: false
+	// responses:
+	//   "200":
+	//     "$ref": "#/responses/NotificationThreadList"
+
+	before, since, err := utils.GetQueryBeforeSince(ctx)
+	if err != nil {
+		ctx.InternalServerError(err)
+		return
+	}
+	opts := models.FindNotificationOptions{
+		UserID:            ctx.User.ID,
+		RepoID:            ctx.Repo.Repository.ID,
+		UpdatedBeforeUnix: before,
+		UpdatedAfterUnix:  since,
+	}
+	qAll := strings.Trim(ctx.Query("all"), " ")
+	if qAll != "true" {
+		opts.Status = models.NotificationStatusUnread
+	}
+	nl, err := models.GetNotifications(opts)
+	if err != nil {
+		ctx.InternalServerError(err)
+		return
+	}
+	err = nl.LoadAttributes()
+	if err != nil {
+		ctx.InternalServerError(err)
+		return
+	}
+
+	ctx.JSON(http.StatusOK, nl.APIFormat())
+}
+
+// ReadRepoNotifications mark notification threads as read on a specific repo
+func ReadRepoNotifications(ctx *context.APIContext) {
+	// swagger:operation PUT /repos/{owner}/{repo}/notifications notification notifyReadRepoList
+	// ---
+	// summary: Mark notification threads as read on a specific repo
+	// consumes:
+	// - application/json
+	// produces:
+	// - application/json
+	// parameters:
+	// - name: owner
+	//   in: path
+	//   description: owner of the repo
+	//   type: string
+	//   required: true
+	// - name: repo
+	//   in: path
+	//   description: name of the repo
+	//   type: string
+	//   required: true
+	// - name: last_read_at
+	//   in: query
+	//   description: Describes the last point that notifications were checked. Anything updated since this time will not be updated.
+	//   type: string
+	//   format: date-time
+	//   required: false
+	// responses:
+	//   "205":
+	//     "$ref": "#/responses/empty"
+
+	lastRead := int64(0)
+	qLastRead := strings.Trim(ctx.Query("last_read_at"), " ")
+	if len(qLastRead) > 0 {
+		tmpLastRead, err := time.Parse(time.RFC3339, qLastRead)
+		if err != nil {
+			ctx.InternalServerError(err)
+			return
+		}
+		if !tmpLastRead.IsZero() {
+			lastRead = tmpLastRead.Unix()
+		}
+	}
+	opts := models.FindNotificationOptions{
+		UserID:            ctx.User.ID,
+		RepoID:            ctx.Repo.Repository.ID,
+		UpdatedBeforeUnix: lastRead,
+		Status:            models.NotificationStatusUnread,
+	}
+	nl, err := models.GetNotifications(opts)
+	if err != nil {
+		ctx.InternalServerError(err)
+		return
+	}
+
+	for _, n := range nl {
+		err := models.SetNotificationStatus(n.ID, ctx.User, models.NotificationStatusRead)
+		if err != nil {
+			ctx.InternalServerError(err)
+			return
+		}
+		ctx.Status(http.StatusResetContent)
+	}
+
+	ctx.Status(http.StatusResetContent)
+}
diff --git a/routers/api/v1/notify/threads.go b/routers/api/v1/notify/threads.go
new file mode 100644
index 0000000000..d0119e9938
--- /dev/null
+++ b/routers/api/v1/notify/threads.go
@@ -0,0 +1,101 @@
+// Copyright 2020 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 notify
+
+import (
+	"fmt"
+	"net/http"
+
+	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/modules/context"
+)
+
+// GetThread get notification by ID
+func GetThread(ctx *context.APIContext) {
+	// swagger:operation GET /notifications/threads/{id} notification notifyGetThread
+	// ---
+	// summary: Get notification thread by ID
+	// consumes:
+	// - application/json
+	// produces:
+	// - application/json
+	// parameters:
+	// - name: id
+	//   in: path
+	//   description: id of notification thread
+	//   type: string
+	//   required: true
+	// responses:
+	//   "200":
+	//     "$ref": "#/responses/NotificationThread"
+	//   "403":
+	//     "$ref": "#/responses/forbidden"
+	//   "404":
+	//     "$ref": "#/responses/notFound"
+
+	n := getThread(ctx)
+	if n == nil {
+		return
+	}
+	if err := n.LoadAttributes(); err != nil {
+		ctx.InternalServerError(err)
+		return
+	}
+
+	ctx.JSON(http.StatusOK, n.APIFormat())
+}
+
+// ReadThread mark notification as read by ID
+func ReadThread(ctx *context.APIContext) {
+	// swagger:operation PATCH /notifications/threads/{id} notification notifyReadThread
+	// ---
+	// summary: Mark notification thread as read by ID
+	// consumes:
+	// - application/json
+	// produces:
+	// - application/json
+	// parameters:
+	// - name: id
+	//   in: path
+	//   description: id of notification thread
+	//   type: string
+	//   required: true
+	// responses:
+	//   "205":
+	//     "$ref": "#/responses/empty"
+	//   "403":
+	//     "$ref": "#/responses/forbidden"
+	//   "404":
+	//     "$ref": "#/responses/notFound"
+
+	n := getThread(ctx)
+	if n == nil {
+		return
+	}
+
+	err := models.SetNotificationStatus(n.ID, ctx.User, models.NotificationStatusRead)
+	if err != nil {
+		ctx.InternalServerError(err)
+		return
+	}
+	ctx.Status(http.StatusResetContent)
+}
+
+func getThread(ctx *context.APIContext) *models.Notification {
+	n, err := models.GetNotificationByID(ctx.ParamsInt64(":id"))
+	if err != nil {
+		if models.IsErrNotExist(err) {
+			ctx.Error(http.StatusNotFound, "GetNotificationByID", err)
+		} else {
+			ctx.InternalServerError(err)
+		}
+		return nil
+	}
+	if n.UserID != ctx.User.ID && !ctx.User.IsAdmin {
+		ctx.Error(http.StatusForbidden, "GetNotificationByID", fmt.Errorf("only user itself and admin are allowed to read/change this thread %d", n.ID))
+		return nil
+	}
+	return n
+}
diff --git a/routers/api/v1/notify/user.go b/routers/api/v1/notify/user.go
new file mode 100644
index 0000000000..d16e4da0e0
--- /dev/null
+++ b/routers/api/v1/notify/user.go
@@ -0,0 +1,129 @@
+// Copyright 2020 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 notify
+
+import (
+	"net/http"
+	"strings"
+	"time"
+
+	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/routers/api/v1/utils"
+)
+
+// ListNotifications list users's notification threads
+func ListNotifications(ctx *context.APIContext) {
+	// swagger:operation GET /notifications notification notifyGetList
+	// ---
+	// summary: List users's notification threads
+	// consumes:
+	// - application/json
+	// produces:
+	// - application/json
+	// parameters:
+	// - name: all
+	//   in: query
+	//   description: If true, show notifications marked as read. Default value is false
+	//   type: string
+	//   required: false
+	// - name: since
+	//   in: query
+	//   description: Only show notifications updated after the given time. This is a timestamp in RFC 3339 format
+	//   type: string
+	//   format: date-time
+	//   required: false
+	// - name: before
+	//   in: query
+	//   description: Only show notifications updated before the given time. This is a timestamp in RFC 3339 format
+	//   type: string
+	//   format: date-time
+	//   required: false
+	// responses:
+	//   "200":
+	//     "$ref": "#/responses/NotificationThreadList"
+
+	before, since, err := utils.GetQueryBeforeSince(ctx)
+	if err != nil {
+		ctx.InternalServerError(err)
+		return
+	}
+	opts := models.FindNotificationOptions{
+		UserID:            ctx.User.ID,
+		UpdatedBeforeUnix: before,
+		UpdatedAfterUnix:  since,
+	}
+	qAll := strings.Trim(ctx.Query("all"), " ")
+	if qAll != "true" {
+		opts.Status = models.NotificationStatusUnread
+	}
+	nl, err := models.GetNotifications(opts)
+	if err != nil {
+		ctx.InternalServerError(err)
+		return
+	}
+	err = nl.LoadAttributes()
+	if err != nil {
+		ctx.InternalServerError(err)
+		return
+	}
+
+	ctx.JSON(http.StatusOK, nl.APIFormat())
+}
+
+// ReadNotifications mark notification threads as read
+func ReadNotifications(ctx *context.APIContext) {
+	// swagger:operation PUT /notifications notification notifyReadList
+	// ---
+	// summary: Mark notification threads as read
+	// consumes:
+	// - application/json
+	// produces:
+	// - application/json
+	// parameters:
+	// - name: last_read_at
+	//   in: query
+	//   description: Describes the last point that notifications were checked. Anything updated since this time will not be updated.
+	//   type: string
+	//   format: date-time
+	//   required: false
+	// responses:
+	//   "205":
+	//     "$ref": "#/responses/empty"
+
+	lastRead := int64(0)
+	qLastRead := strings.Trim(ctx.Query("last_read_at"), " ")
+	if len(qLastRead) > 0 {
+		tmpLastRead, err := time.Parse(time.RFC3339, qLastRead)
+		if err != nil {
+			ctx.InternalServerError(err)
+			return
+		}
+		if !tmpLastRead.IsZero() {
+			lastRead = tmpLastRead.Unix()
+		}
+	}
+	opts := models.FindNotificationOptions{
+		UserID:            ctx.User.ID,
+		UpdatedBeforeUnix: lastRead,
+		Status:            models.NotificationStatusUnread,
+	}
+	nl, err := models.GetNotifications(opts)
+	if err != nil {
+		ctx.InternalServerError(err)
+		return
+	}
+
+	for _, n := range nl {
+		err := models.SetNotificationStatus(n.ID, ctx.User, models.NotificationStatusRead)
+		if err != nil {
+			ctx.InternalServerError(err)
+			return
+		}
+		ctx.Status(http.StatusResetContent)
+	}
+
+	ctx.Status(http.StatusResetContent)
+}
diff --git a/routers/api/v1/repo/pull.go b/routers/api/v1/repo/pull.go
index d0551320fd..85ef419780 100644
--- a/routers/api/v1/repo/pull.go
+++ b/routers/api/v1/repo/pull.go
@@ -136,6 +136,8 @@ func GetPullRequest(ctx *context.APIContext) {
 	// responses:
 	//   "200":
 	//     "$ref": "#/responses/PullRequest"
+	//   "404":
+	//     "$ref": "#/responses/notFound"
 
 	pr, err := models.GetPullRequestByIndex(ctx.Repo.Repository.ID, ctx.ParamsInt64(":index"))
 	if err != nil {
diff --git a/routers/api/v1/swagger/notify.go b/routers/api/v1/swagger/notify.go
new file mode 100644
index 0000000000..7d45da0e12
--- /dev/null
+++ b/routers/api/v1/swagger/notify.go
@@ -0,0 +1,23 @@
+// Copyright 2019 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 swagger
+
+import (
+	api "code.gitea.io/gitea/modules/structs"
+)
+
+// NotificationThread
+// swagger:response NotificationThread
+type swaggerNotificationThread struct {
+	// in:body
+	Body api.NotificationThread `json:"body"`
+}
+
+// NotificationThreadList
+// swagger:response NotificationThreadList
+type swaggerNotificationThreadList struct {
+	// in:body
+	Body []api.NotificationThread `json:"body"`
+}