1 files changed, 162 insertions, 0 deletions

diff --git a/models/issues/issue_project.go b/models/issues/issue_project.go
new file mode 100644
index 00000000..835ea1db
--- /dev/null
+++ b/models/issues/issue_project.go
@@ -0,0 +1,162 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package issues
+
+import (
+	"context"
+
+	"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
+func (issue *Issue) LoadProject(ctx context.Context) (err error) {
+	if issue.Project == nil {
+		var p project_model.Project
+		has, err := db.GetEngine(ctx).Table("project").
+			Join("INNER", "project_issue", "project.id=project_issue.project_id").
+			Where("project_issue.issue_id = ?", issue.ID).Get(&p)
+		if err != nil {
+			return err
+		} else if has {
+			issue.Project = &p
+		}
+	}
+	return err
+}
+
+func (issue *Issue) projectID(ctx context.Context) int64 {
+	var ip project_model.ProjectIssue
+	has, err := db.GetEngine(ctx).Where("issue_id=?", issue.ID).Get(&ip)
+	if err != nil || !has {
+		return 0
+	}
+	return ip.ProjectID
+}
+
+// ProjectColumnID return project column id if issue was assigned to one
+func (issue *Issue) ProjectColumnID(ctx context.Context) int64 {
+	var ip project_model.ProjectIssue
+	has, err := db.GetEngine(ctx).Where("issue_id=?", issue.ID).Get(&ip)
+	if err != nil || !has {
+		return 0
+	}
+	return ip.ProjectColumnID
+}
+
+// LoadIssuesFromColumn load issues assigned to this column
+func LoadIssuesFromColumn(ctx context.Context, b *project_model.Column) (IssueList, error) {
+	issueList, err := Issues(ctx, &IssuesOptions{
+		ProjectColumnID: b.ID,
+		ProjectID:       b.ProjectID,
+		SortType:        "project-column-sorting",
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	if b.Default {
+		issues, err := Issues(ctx, &IssuesOptions{
+			ProjectColumnID: db.NoConditionID,
+			ProjectID:       b.ProjectID,
+			SortType:        "project-column-sorting",
+		})
+		if err != nil {
+			return nil, err
+		}
+		issueList = append(issueList, issues...)
+	}
+
+	if err := issueList.LoadComments(ctx); err != nil {
+		return nil, err
+	}
+
+	return issueList, nil
+}
+
+// LoadIssuesFromColumnList load issues assigned to the columns
+func LoadIssuesFromColumnList(ctx context.Context, bs project_model.ColumnList) (map[int64]IssueList, error) {
+	issuesMap := make(map[int64]IssueList, len(bs))
+	for i := range bs {
+		il, err := LoadIssuesFromColumn(ctx, bs[i])
+		if err != nil {
+			return nil, err
+		}
+		issuesMap[bs[i].ID] = il
+	}
+	return issuesMap, nil
+}
+
+// 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 := 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 {
+				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.GetDefaultColumn(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 {
+				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,
+			ProjectColumnID: newColumnID,
+			Sorting:         newSorting,
+		})
+	})
+}