Add watch button on issue

models/issue_watch.go

@@ -16,5 +16,45 @@ type IssueWatch struct {
 
 // BeforeInsert is invoked from XORM before inserting an object of this type.
 func (iw *IssueWatch) BeforeInsert() {
+	iw.Created = time.Now()
 	iw.CreatedUnix = time.Now().Unix()
 }
+
+// CreateOrUpdateIssueWatch set watching for a user and issue
+func CreateOrUpdateIssueWatch(userID, issueID int64, isWatching bool) error {
+	iw, exists, err := getIssueWatch(x, userID, issueID)
+	if err != nil {
+		return err
+	}
+
+	if !exists {
+		iw = &IssueWatch{
+			UserID:     userID,
+			IssueID:    issueID,
+			IsWatching: isWatching,
+		}
+
+		if _, err := x.Insert(iw); err != nil {
+			return err
+		}
+	} else {
+		if _, err := x.Table(&IssueWatch{}).Id(iw.ID).Update(map[string]interface{}{"is_watching": isWatching}); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// GetIssueWatch returns an issue watch by user and issue
+func GetIssueWatch(userID, issueID int64) (iw *IssueWatch, exists bool, err error) {
+	iw, exists, err = getIssueWatch(x, userID, issueID)
+	return
+}
+func getIssueWatch(e Engine, userID, issueID int64) (iw *IssueWatch, exists bool, err error) {
+	iw = new(IssueWatch)
+	exists, err = e.
+		Where("user_id = ?", userID).
+		And("issue_id = ?", issueID).
+		Get(iw)
+	return
+}