Use `CloseIssue` and `ReopenIssue` instead of `ChangeStatus` (#32467)

The behaviors of closing issues and reopening issues are very different.
So splitting it into two different functions makes it easier to
maintain.

- [x] Split ChangeIssueStatus into CloseIssue and ReopenIssue both at
the service layer and model layer
- [x] Rename `isClosed` to `CloseOrReopen` to make it more readable.
- [x] Add transactions for ReopenIssue and CloseIssue

---------

Co-authored-by: Zettat123 <zettat123@gmail.com>

11 files changed, 167 insertions, 95 deletions

diff --git a/models/issues/dependency_test.go b/models/issues/dependency_test.go
index 6eed483cc9..67418039de 100644
--- a/models/issues/dependency_test.go
+++ b/models/issues/dependency_test.go
@@ -49,9 +49,13 @@ func TestCreateIssueDependency(t *testing.T) {
 	assert.False(t, left)
 
 	// Close #2 and check again
-	_, err = issues_model.ChangeIssueStatus(db.DefaultContext, issue2, user1, true)
+	_, err = issues_model.CloseIssue(db.DefaultContext, issue2, user1)
 	assert.NoError(t, err)
 
+	issue2Closed, err := issues_model.GetIssueByID(db.DefaultContext, 2)
+	assert.NoError(t, err)
+	assert.True(t, issue2Closed.IsClosed)
+
 	left, err = issues_model.IssueNoDependenciesLeft(db.DefaultContext, issue1)
 	assert.NoError(t, err)
 	assert.True(t, left)
@@ -59,4 +63,11 @@ func TestCreateIssueDependency(t *testing.T) {
 	// Test removing the dependency
 	err = issues_model.RemoveIssueDependency(db.DefaultContext, user1, issue1, issue2, issues_model.DependencyTypeBlockedBy)
 	assert.NoError(t, err)
+
+	_, err = issues_model.ReopenIssue(db.DefaultContext, issue2, user1)
+	assert.NoError(t, err)
+
+	issue2Reopened, err := issues_model.GetIssueByID(db.DefaultContext, 2)
+	assert.NoError(t, err)
+	assert.False(t, issue2Reopened.IsClosed)
 }
diff --git a/models/issues/issue_update.go b/models/issues/issue_update.go
index 5b929c9115..ceb4a4027e 100644
--- a/models/issues/issue_update.go
+++ b/models/issues/issue_update.go
@@ -119,8 +119,8 @@ func doChangeIssueStatus(ctx context.Context, issue *Issue, doer *user_model.Use
 	})
 }
 
-// ChangeIssueStatus changes issue status to open or closed.
-func ChangeIssueStatus(ctx context.Context, issue *Issue, doer *user_model.User, isClosed bool) (*Comment, error) {
+// CloseIssue changes issue status to closed.
+func CloseIssue(ctx context.Context, issue *Issue, doer *user_model.User) (*Comment, error) {
 	if err := issue.LoadRepo(ctx); err != nil {
 		return nil, err
 	}
@@ -128,7 +128,45 @@ func ChangeIssueStatus(ctx context.Context, issue *Issue, doer *user_model.User,
 		return nil, err
 	}
 
-	return changeIssueStatus(ctx, issue, doer, isClosed, false)
+	ctx, committer, err := db.TxContext(ctx)
+	if err != nil {
+		return nil, err
+	}
+	defer committer.Close()
+
+	comment, err := changeIssueStatus(ctx, issue, doer, true, false)
+	if err != nil {
+		return nil, err
+	}
+	if err := committer.Commit(); err != nil {
+		return nil, err
+	}
+	return comment, nil
+}
+
+// ReopenIssue changes issue status to open.
+func ReopenIssue(ctx context.Context, issue *Issue, doer *user_model.User) (*Comment, error) {
+	if err := issue.LoadRepo(ctx); err != nil {
+		return nil, err
+	}
+	if err := issue.LoadPoster(ctx); err != nil {
+		return nil, err
+	}
+
+	ctx, committer, err := db.TxContext(ctx)
+	if err != nil {
+		return nil, err
+	}
+	defer committer.Close()
+
+	comment, err := changeIssueStatus(ctx, issue, doer, false, false)
+	if err != nil {
+		return nil, err
+	}
+	if err := committer.Commit(); err != nil {
+		return nil, err
+	}
+	return comment, nil
 }
 
 // ChangeIssueTitle changes the title of this issue, as the given user.
diff --git a/models/issues/issue_xref_test.go b/models/issues/issue_xref_test.go
index f1b1bb2a6b..7f257330b7 100644
--- a/models/issues/issue_xref_test.go
+++ b/models/issues/issue_xref_test.go
@@ -98,7 +98,7 @@ func TestXRef_ResolveCrossReferences(t *testing.T) {
 	i1 := testCreateIssue(t, 1, 2, "title1", "content1", false)
 	i2 := testCreateIssue(t, 1, 2, "title2", "content2", false)
 	i3 := testCreateIssue(t, 1, 2, "title3", "content3", false)
-	_, err := issues_model.ChangeIssueStatus(db.DefaultContext, i3, d, true)
+	_, err := issues_model.CloseIssue(db.DefaultContext, i3, d)
 	assert.NoError(t, err)
 
 	pr := testCreatePR(t, 1, 2, "titlepr", fmt.Sprintf("closes #%d", i1.Index))
diff --git a/routers/api/v1/repo/issue.go b/routers/api/v1/repo/issue.go
index 6f45fce226..86dbcee5f7 100644
--- a/routers/api/v1/repo/issue.go
+++ b/routers/api/v1/repo/issue.go
@@ -733,7 +733,7 @@ func CreateIssue(ctx *context.APIContext) {
 	}
 
 	if form.Closed {
-		if err := issue_service.ChangeStatus(ctx, issue, ctx.Doer, "", true); err != nil {
+		if err := issue_service.CloseIssue(ctx, issue, ctx.Doer, ""); err != nil {
 			if issues_model.IsErrDependenciesLeft(err) {
 				ctx.Error(http.StatusPreconditionFailed, "DependenciesLeft", "cannot close this issue because it still has open dependencies")
 				return
@@ -912,27 +912,11 @@ func EditIssue(ctx *context.APIContext) {
 			}
 		}
 
-		var isClosed bool
-		switch state := api.StateType(*form.State); state {
-		case api.StateOpen:
-			isClosed = false
-		case api.StateClosed:
-			isClosed = true
-		default:
-			ctx.Error(http.StatusPreconditionFailed, "UnknownIssueStateError", fmt.Sprintf("unknown state: %s", state))
+		state := api.StateType(*form.State)
+		closeOrReopenIssue(ctx, issue, state)
+		if ctx.Written() {
 			return
 		}
-
-		if issue.IsClosed != isClosed {
-			if err := issue_service.ChangeStatus(ctx, issue, ctx.Doer, "", isClosed); err != nil {
-				if issues_model.IsErrDependenciesLeft(err) {
-					ctx.Error(http.StatusPreconditionFailed, "DependenciesLeft", "cannot close this issue because it still has open dependencies")
-					return
-				}
-				ctx.Error(http.StatusInternalServerError, "ChangeStatus", err)
-				return
-			}
-		}
 	}
 
 	// Refetch from database to assign some automatic values
@@ -1055,3 +1039,26 @@ func UpdateIssueDeadline(ctx *context.APIContext) {
 
 	ctx.JSON(http.StatusCreated, api.IssueDeadline{Deadline: deadlineUnix.AsTimePtr()})
 }
+
+func closeOrReopenIssue(ctx *context.APIContext, issue *issues_model.Issue, state api.StateType) {
+	if state != api.StateOpen && state != api.StateClosed {
+		ctx.Error(http.StatusPreconditionFailed, "UnknownIssueStateError", fmt.Sprintf("unknown state: %s", state))
+		return
+	}
+
+	if state == api.StateClosed && !issue.IsClosed {
+		if err := issue_service.CloseIssue(ctx, issue, ctx.Doer, ""); err != nil {
+			if issues_model.IsErrDependenciesLeft(err) {
+				ctx.Error(http.StatusPreconditionFailed, "DependenciesLeft", "cannot close this issue or pull request because it still has open dependencies")
+				return
+			}
+			ctx.Error(http.StatusInternalServerError, "CloseIssue", err)
+			return
+		}
+	} else if state == api.StateOpen && issue.IsClosed {
+		if err := issue_service.ReopenIssue(ctx, issue, ctx.Doer, ""); err != nil {
+			ctx.Error(http.StatusInternalServerError, "ReopenIssue", err)
+			return
+		}
+	}
+}
diff --git a/routers/api/v1/repo/pull.go b/routers/api/v1/repo/pull.go
index ca5120eef5..d0c3459b63 100644
--- a/routers/api/v1/repo/pull.go
+++ b/routers/api/v1/repo/pull.go
@@ -728,27 +728,11 @@ func EditPullRequest(ctx *context.APIContext) {
 			return
 		}
 
-		var isClosed bool
-		switch state := api.StateType(*form.State); state {
-		case api.StateOpen:
-			isClosed = false
-		case api.StateClosed:
-			isClosed = true
-		default:
-			ctx.Error(http.StatusPreconditionFailed, "UnknownPRStateError", fmt.Sprintf("unknown state: %s", state))
+		state := api.StateType(*form.State)
+		closeOrReopenIssue(ctx, issue, state)
+		if ctx.Written() {
 			return
 		}
-
-		if issue.IsClosed != isClosed {
-			if err := issue_service.ChangeStatus(ctx, issue, ctx.Doer, "", isClosed); err != nil {
-				if issues_model.IsErrDependenciesLeft(err) {
-					ctx.Error(http.StatusPreconditionFailed, "DependenciesLeft", "cannot close this pull request because it still has open dependencies")
-					return
-				}
-				ctx.Error(http.StatusInternalServerError, "ChangeStatus", err)
-				return
-			}
-		}
 	}
 
 	// change pull target branch
diff --git a/routers/web/repo/issue_comment.go b/routers/web/repo/issue_comment.go
index 438822431d..8564c613de 100644
--- a/routers/web/repo/issue_comment.go
+++ b/routers/web/repo/issue_comment.go
@@ -154,25 +154,28 @@ func NewComment(ctx *context.Context) {
 			if pr != nil {
 				ctx.Flash.Info(ctx.Tr("repo.pulls.open_unmerged_pull_exists", pr.Index))
 			} else {
-				isClosed := form.Status == "close"
-				if err := issue_service.ChangeStatus(ctx, issue, ctx.Doer, "", isClosed); err != nil {
-					log.Error("ChangeStatus: %v", err)
-
-					if issues_model.IsErrDependenciesLeft(err) {
-						if issue.IsPull {
-							ctx.JSONError(ctx.Tr("repo.issues.dependency.pr_close_blocked"))
-						} else {
-							ctx.JSONError(ctx.Tr("repo.issues.dependency.issue_close_blocked"))
+				if form.Status == "close" && !issue.IsClosed {
+					if err := issue_service.CloseIssue(ctx, issue, ctx.Doer, ""); err != nil {
+						log.Error("CloseIssue: %v", err)
+						if issues_model.IsErrDependenciesLeft(err) {
+							if issue.IsPull {
+								ctx.JSONError(ctx.Tr("repo.issues.dependency.pr_close_blocked"))
+							} else {
+								ctx.JSONError(ctx.Tr("repo.issues.dependency.issue_close_blocked"))
+							}
+							return
 						}
-						return
+					} else {
+						if err := stopTimerIfAvailable(ctx, ctx.Doer, issue); err != nil {
+							ctx.ServerError("stopTimerIfAvailable", err)
+							return
+						}
+						log.Trace("Issue [%d] status changed to closed: %v", issue.ID, issue.IsClosed)
 					}
-				} else {
-					if err := stopTimerIfAvailable(ctx, ctx.Doer, issue); err != nil {
-						ctx.ServerError("CreateOrStopIssueStopwatch", err)
-						return
+				} else if form.Status == "reopen" && issue.IsClosed {
+					if err := issue_service.ReopenIssue(ctx, issue, ctx.Doer, ""); err != nil {
+						log.Error("ReopenIssue: %v", err)
 					}
-
-					log.Trace("Issue [%d] status changed to closed: %v", issue.ID, issue.IsClosed)
 				}
 			}
 		}
diff --git a/routers/web/repo/issue_list.go b/routers/web/repo/issue_list.go
index 2c73a24632..2f615a100e 100644
--- a/routers/web/repo/issue_list.go
+++ b/routers/web/repo/issue_list.go
@@ -418,14 +418,11 @@ func UpdateIssueStatus(ctx *context.Context) {
 		return
 	}
 
-	var isClosed bool
-	switch action := ctx.FormString("action"); action {
-	case "open":
-		isClosed = false
-	case "close":
-		isClosed = true
-	default:
+	action := ctx.FormString("action")
+	if action != "open" && action != "close" {
 		log.Warn("Unrecognized action: %s", action)
+		ctx.JSONOK()
+		return
 	}
 
 	if _, err := issues.LoadRepositories(ctx); err != nil {
@@ -441,15 +438,20 @@ func UpdateIssueStatus(ctx *context.Context) {
 		if issue.IsPull && issue.PullRequest.HasMerged {
 			continue
 		}
-		if issue.IsClosed != isClosed {
-			if err := issue_service.ChangeStatus(ctx, issue, ctx.Doer, "", isClosed); err != nil {
+		if action == "close" && !issue.IsClosed {
+			if err := issue_service.CloseIssue(ctx, issue, ctx.Doer, ""); err != nil {
 				if issues_model.IsErrDependenciesLeft(err) {
 					ctx.JSON(http.StatusPreconditionFailed, map[string]any{
 						"error": ctx.Tr("repo.issues.dependency.issue_batch_close_blocked", issue.Index),
 					})
 					return
 				}
-				ctx.ServerError("ChangeStatus", err)
+				ctx.ServerError("CloseIssue", err)
+				return
+			}
+		} else if action == "open" && issue.IsClosed {
+			if err := issue_service.ReopenIssue(ctx, issue, ctx.Doer, ""); err != nil {
+				ctx.ServerError("ReopenIssue", err)
 				return
 			}
 		}
diff --git a/services/issue/commit.go b/services/issue/commit.go
index 0579e0f5c5..963d0359fd 100644
--- a/services/issue/commit.go
+++ b/services/issue/commit.go
@@ -188,15 +188,19 @@ func UpdateIssuesCommit(ctx context.Context, doer *user_model.User, repo *repo_m
 					continue
 				}
 			}
-			isClosed := ref.Action == references.XRefActionCloses
-			if isClosed && len(ref.TimeLog) > 0 {
-				if err := issueAddTime(ctx, refIssue, doer, c.Timestamp, ref.TimeLog); err != nil {
+
+			refIssue.Repo = refRepo
+			if ref.Action == references.XRefActionCloses && !refIssue.IsClosed {
+				if len(ref.TimeLog) > 0 {
+					if err := issueAddTime(ctx, refIssue, doer, c.Timestamp, ref.TimeLog); err != nil {
+						return err
+					}
+				}
+				if err := CloseIssue(ctx, refIssue, doer, c.Sha1); err != nil {
 					return err
 				}
-			}
-			if isClosed != refIssue.IsClosed {
-				refIssue.Repo = refRepo
-				if err := ChangeStatus(ctx, refIssue, doer, c.Sha1, isClosed); err != nil {
+			} else if ref.Action == references.XRefActionReopens && refIssue.IsClosed {
+				if err := ReopenIssue(ctx, refIssue, doer, c.Sha1); err != nil {
 					return err
 				}
 			}
diff --git a/services/issue/status.go b/services/issue/status.go
index 967c29bd22..e18b891175 100644
--- a/services/issue/status.go
+++ b/services/issue/status.go
@@ -6,34 +6,54 @@ package issue
 import (
 	"context"
 
+	"code.gitea.io/gitea/models/db"
 	issues_model "code.gitea.io/gitea/models/issues"
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/log"
 	notify_service "code.gitea.io/gitea/services/notify"
 )
 
-// ChangeStatus changes issue status to open or closed.
-// closed means the target status
-// Fix me: you should check whether the current issue status is same to the target status before call this function
-// as in function changeIssueStatus we will return WasClosedError, even the issue status and target status are both open
-func ChangeStatus(ctx context.Context, issue *issues_model.Issue, doer *user_model.User, commitID string, closed bool) error {
-	comment, err := issues_model.ChangeIssueStatus(ctx, issue, doer, closed)
+// CloseIssue close an issue.
+func CloseIssue(ctx context.Context, issue *issues_model.Issue, doer *user_model.User, commitID string) error {
+	dbCtx, committer, err := db.TxContext(ctx)
 	if err != nil {
-		if issues_model.IsErrDependenciesLeft(err) && closed {
-			if err := issues_model.FinishIssueStopwatchIfPossible(ctx, doer, issue); err != nil {
+		return err
+	}
+	defer committer.Close()
+
+	comment, err := issues_model.CloseIssue(dbCtx, issue, doer)
+	if err != nil {
+		if issues_model.IsErrDependenciesLeft(err) {
+			if err := issues_model.FinishIssueStopwatchIfPossible(dbCtx, doer, issue); err != nil {
 				log.Error("Unable to stop stopwatch for issue[%d]#%d: %v", issue.ID, issue.Index, err)
 			}
 		}
 		return err
 	}
 
-	if closed {
-		if err := issues_model.FinishIssueStopwatchIfPossible(ctx, doer, issue); err != nil {
-			return err
-		}
+	if err := issues_model.FinishIssueStopwatchIfPossible(dbCtx, doer, issue); err != nil {
+		return err
+	}
+
+	if err := committer.Commit(); err != nil {
+		return err
+	}
+	committer.Close()
+
+	notify_service.IssueChangeStatus(ctx, doer, commitID, issue, comment, true)
+
+	return nil
+}
+
+// ReopenIssue reopen an issue.
+// FIXME: If some issues dependent this one are closed, should we also reopen them?
+func ReopenIssue(ctx context.Context, issue *issues_model.Issue, doer *user_model.User, commitID string) error {
+	comment, err := issues_model.ReopenIssue(ctx, issue, doer)
+	if err != nil {
+		return err
 	}
 
-	notify_service.IssueChangeStatus(ctx, doer, commitID, issue, comment, closed)
+	notify_service.IssueChangeStatus(ctx, doer, commitID, issue, comment, false)
 
 	return nil
 }
diff --git a/services/pull/merge.go b/services/pull/merge.go
index fba85f1e51..75011a697c 100644
--- a/services/pull/merge.go
+++ b/services/pull/merge.go
@@ -263,14 +263,17 @@ func handleCloseCrossReferences(ctx context.Context, pr *issues_model.PullReques
 		if err = ref.Issue.LoadRepo(ctx); err != nil {
 			return err
 		}
-		isClosed := ref.RefAction == references.XRefActionCloses
-		if isClosed != ref.Issue.IsClosed {
-			if err = issue_service.ChangeStatus(ctx, ref.Issue, doer, pr.MergedCommitID, isClosed); err != nil {
+		if ref.RefAction == references.XRefActionCloses && !ref.Issue.IsClosed {
+			if err = issue_service.CloseIssue(ctx, ref.Issue, doer, pr.MergedCommitID); err != nil {
 				// Allow ErrDependenciesLeft
 				if !issues_model.IsErrDependenciesLeft(err) {
 					return err
 				}
 			}
+		} else if ref.RefAction == references.XRefActionReopens && ref.Issue.IsClosed {
+			if err = issue_service.ReopenIssue(ctx, ref.Issue, doer, pr.MergedCommitID); err != nil {
+				return err
+			}
 		}
 	}
 	return nil
diff --git a/services/pull/pull.go b/services/pull/pull.go
index 0256c2c3f6..ac91fd6409 100644
--- a/services/pull/pull.go
+++ b/services/pull/pull.go
@@ -706,7 +706,7 @@ func CloseBranchPulls(ctx context.Context, doer *user_model.User, repoID int64,
 
 	var errs errlist
 	for _, pr := range prs {
-		if err = issue_service.ChangeStatus(ctx, pr.Issue, doer, "", true); err != nil && !issues_model.IsErrPullWasClosed(err) && !issues_model.IsErrDependenciesLeft(err) {
+		if err = issue_service.CloseIssue(ctx, pr.Issue, doer, ""); err != nil && !issues_model.IsErrPullWasClosed(err) && !issues_model.IsErrDependenciesLeft(err) {
 			errs = append(errs, err)
 		}
 	}
@@ -740,7 +740,7 @@ func CloseRepoBranchesPulls(ctx context.Context, doer *user_model.User, repo *re
 			if pr.BaseRepoID == repo.ID {
 				continue
 			}
-			if err = issue_service.ChangeStatus(ctx, pr.Issue, doer, "", true); err != nil && !issues_model.IsErrPullWasClosed(err) {
+			if err = issue_service.CloseIssue(ctx, pr.Issue, doer, ""); err != nil && !issues_model.IsErrPullWasClosed(err) {
 				errs = append(errs, err)
 			}
 		}