Fix various problems around projects board view (#30696)

The previous implementation will start multiple POST requests from the
frontend when moving a column and another bug is moving the default
column will never be remembered in fact.

- [x] This PR will allow the default column to move to a non-first
position
- [x] And it also uses one request instead of multiple requests when
moving the columns
- [x] Use a star instead of a pin as the icon for setting the default
column action
- [x] Inserted new column will be append to the end
- [x] Fix #30701 the newly added issue will be append to the end of the
default column
- [x] Fix when deleting a column, all issues in it will be displayed
from UI but database records exist.
- [x] Add a limitation for columns in a project to 20. So the sorting
will not be overflow because it's int8.

---------

Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
(cherry picked from commit a303c973e0264dab45a787c4afa200e183e0d953)

Conflicts:
	routers/web/web.go
	e91733468ef726fc9365aa4820cdd5f2ddfdaa23 Add missing database transaction for new issue (#29490) was not cherry-picked
	services/issue/issue.go
	fe6792dff3 Enable/disable owner and repo projects independently (#28805) was not cherry-picked
(cherry picked from commit 7d3ca90dfe)

(cherry picked from commit 084bec89ed7ae0816fc2d8db6784ad22523d1fc4)

models/issues/issue_project.go

@@ -5,11 +5,11 @@ package issues
 
 import (
 	"context"
-	"fmt"
 
 	"code.gitea.io/gitea/models/db"
 	project_model "code.gitea.io/gitea/models/project"
 	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/util"
 )
 
 // LoadProject load the project the issue was assigned to
@@ -90,58 +90,73 @@ func LoadIssuesFromBoardList(ctx context.Context, bs project_model.BoardList) (m
 	return issuesMap, nil
 }
 
-// ChangeProjectAssign changes the project associated with an issue
-func ChangeProjectAssign(ctx context.Context, issue *Issue, doer *user_model.User, newProjectID int64) error {
-	ctx, committer, err := db.TxContext(ctx)
-	if err != nil {
-		return err
-	}
-	defer committer.Close()
+// IssueAssignOrRemoveProject changes the project associated with an issue
+// If newProjectID is 0, the issue is removed from the project
+func IssueAssignOrRemoveProject(ctx context.Context, issue *Issue, doer *user_model.User, newProjectID, newColumnID int64) error {
+	return db.WithTx(ctx, func(ctx context.Context) error {
+		oldProjectID := issue.projectID(ctx)
 
-	if err := addUpdateIssueProject(ctx, issue, doer, newProjectID); err != nil {
-		return err
-	}
-
-	return committer.Commit()
-}
-
-func addUpdateIssueProject(ctx context.Context, issue *Issue, doer *user_model.User, newProjectID int64) error {
-	oldProjectID := issue.projectID(ctx)
-
-	if err := issue.LoadRepo(ctx); err != nil {
-		return err
-	}
-
-	// Only check if we add a new project and not remove it.
-	if newProjectID > 0 {
-		newProject, err := project_model.GetProjectByID(ctx, newProjectID)
-		if err != nil {
+		if err := issue.LoadRepo(ctx); err != nil {
 			return err
 		}
-		if newProject.RepoID != issue.RepoID && newProject.OwnerID != issue.Repo.OwnerID {
-			return fmt.Errorf("issue's repository is not the same as project's repository")
+
+		// Only check if we add a new project and not remove it.
+		if newProjectID > 0 {
+			newProject, err := project_model.GetProjectByID(ctx, newProjectID)
+			if err != nil {
+				return err
+			}
+			if !newProject.CanBeAccessedByOwnerRepo(issue.Repo.OwnerID, issue.Repo) {
+				return util.NewPermissionDeniedErrorf("issue %d can't be accessed by project %d", issue.ID, newProject.ID)
+			}
+			if newColumnID == 0 {
+				newDefaultColumn, err := newProject.GetDefaultBoard(ctx)
+				if err != nil {
+					return err
+				}
+				newColumnID = newDefaultColumn.ID
+			}
 		}
-	}
 
-	if _, err := db.GetEngine(ctx).Where("project_issue.issue_id=?", issue.ID).Delete(&project_model.ProjectIssue{}); err != nil {
-		return err
-	}
-
-	if oldProjectID > 0 || newProjectID > 0 {
-		if _, err := CreateComment(ctx, &CreateCommentOptions{
-			Type:         CommentTypeProject,
-			Doer:         doer,
-			Repo:         issue.Repo,
-			Issue:        issue,
-			OldProjectID: oldProjectID,
-			ProjectID:    newProjectID,
-		}); err != nil {
+		if _, err := db.GetEngine(ctx).Where("project_issue.issue_id=?", issue.ID).Delete(&project_model.ProjectIssue{}); err != nil {
 			return err
 		}
-	}
 
-	return db.Insert(ctx, &project_model.ProjectIssue{
-		IssueID:   issue.ID,
-		ProjectID: newProjectID,
+		if oldProjectID > 0 || newProjectID > 0 {
+			if _, err := CreateComment(ctx, &CreateCommentOptions{
+				Type:         CommentTypeProject,
+				Doer:         doer,
+				Repo:         issue.Repo,
+				Issue:        issue,
+				OldProjectID: oldProjectID,
+				ProjectID:    newProjectID,
+			}); err != nil {
+				return err
+			}
+		}
+		if newProjectID == 0 {
+			return nil
+		}
+		if newColumnID == 0 {
+			panic("newColumnID must not be zero") // shouldn't happen
+		}
+
+		res := struct {
+			MaxSorting int64
+			IssueCount int64
+		}{}
+		if _, err := db.GetEngine(ctx).Select("max(sorting) as max_sorting, count(*) as issue_count").Table("project_issue").
+			Where("project_id=?", newProjectID).
+			And("project_board_id=?", newColumnID).
+			Get(&res); err != nil {
+			return err
+		}
+		newSorting := util.Iif(res.IssueCount > 0, res.MaxSorting+1, 0)
+		return db.Insert(ctx, &project_model.ProjectIssue{
+			IssueID:        issue.ID,
+			ProjectID:      newProjectID,
+			ProjectBoardID: newColumnID,
+			Sorting:        newSorting,
+		})
 	})
 }