Automatically clear stopwatch on merging a PR (#4327)

* Don't display buttons if there are no notices

* clear stopwatch on merging a PR

* remove redundant gt check

* use ctx.Flash as per @bkcsoft comment

* stop timer on closing issues/PRs too

* updated translation as per review

* redirect to login page after successfully activating account

* remove unrelated changes

* stop timer for issues that are closed via commits too..Not just the 'close' UI button

routers/repo/issue.go

@@ -1181,6 +1181,12 @@ func NewComment(ctx *context.Context, form auth.CreateCommentForm) {
 						return
 					}
 				} else {
+
+					if err := stopTimerIfAvailable(ctx.User, issue); err != nil {
+						ctx.ServerError("CreateOrStopIssueStopwatch", err)
+						return
+					}
+
 					log.Trace("Issue [%d] status changed to closed: %v", issue.ID, issue.IsClosed)
 
 					notification.NotifyIssueChangeStatus(ctx.User, issue, isClosed)

routers/repo/issue_stopwatch.go

@@ -17,6 +17,13 @@ func IssueStopwatch(c *context.Context) {
 	if c.Written() {
 		return
 	}
+
+	var showSuccessMessage bool
+
+	if !models.StopwatchExists(c.User.ID, issue.ID) {
+		showSuccessMessage = true
+	}
+
 	if !c.Repo.CanUseTimetracker(issue, c.User) {
 		c.NotFound("CanUseTimetracker", nil)
 		return
@@ -27,6 +34,10 @@ func IssueStopwatch(c *context.Context) {
 		return
 	}
 
+	if showSuccessMessage {
+		c.Flash.Success(c.Tr("repo.issues.tracker_auto_close"))
+	}
+
 	url := issue.HTMLURL()
 	c.Redirect(url, http.StatusSeeOther)
 }

routers/repo/pull.go

@@ -590,12 +590,28 @@ func MergePullRequest(ctx *context.Context, form auth.MergePullRequestForm) {
 		return
 	}
 
+	if err := stopTimerIfAvailable(ctx.User, issue); err != nil {
+		ctx.ServerError("CreateOrStopIssueStopwatch", err)
+		return
+	}
+
 	notification.NotifyMergePullRequest(pr, ctx.User, ctx.Repo.GitRepo)
 
 	log.Trace("Pull request merged: %d", pr.ID)
 	ctx.Redirect(ctx.Repo.RepoLink + "/pulls/" + com.ToStr(pr.Index))
 }
 
+func stopTimerIfAvailable(user *models.User, issue *models.Issue) error {
+
+	if models.StopwatchExists(user.ID, issue.ID) {
+		if err := models.CreateOrStopIssueStopwatch(user, issue); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
 // ParseCompareInfo parse compare info between two commit for preparing pull request
 func ParseCompareInfo(ctx *context.Context) (*models.User, *models.Repository, *git.Repository, *git.PullRequestInfo, string, string) {
 	baseRepo := ctx.Repo.Repository