1 files changed, 170 insertions, 0 deletions
diff --git a/models/repo/collaboration.go b/models/repo/collaboration.go
new file mode 100644
index 00000000..cb66cb56
--- /dev/null
+++ b/models/repo/collaboration.go
@@ -0,0 +1,170 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package repo
+
+import (
+	"context"
+	"fmt"
+
+	"code.gitea.io/gitea/models/db"
+	"code.gitea.io/gitea/models/perm"
+	"code.gitea.io/gitea/models/unit"
+	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/timeutil"
+
+	"xorm.io/builder"
+)
+
+// Collaboration represent the relation between an individual and a repository.
+type Collaboration struct {
+	ID          int64              `xorm:"pk autoincr"`
+	RepoID      int64              `xorm:"UNIQUE(s) INDEX NOT NULL"`
+	UserID      int64              `xorm:"UNIQUE(s) INDEX NOT NULL"`
+	Mode        perm.AccessMode    `xorm:"DEFAULT 2 NOT NULL"`
+	CreatedUnix timeutil.TimeStamp `xorm:"INDEX created"`
+	UpdatedUnix timeutil.TimeStamp `xorm:"INDEX updated"`
+}
+
+func init() {
+	db.RegisterModel(new(Collaboration))
+}
+
+// Collaborator represents a user with collaboration details.
+type Collaborator struct {
+	*user_model.User
+	Collaboration *Collaboration
+}
+
+// GetCollaborators returns the collaborators for a repository
+func GetCollaborators(ctx context.Context, repoID int64, listOptions db.ListOptions) ([]*Collaborator, error) {
+	collaborations, err := db.Find[Collaboration](ctx, FindCollaborationOptions{
+		ListOptions: listOptions,
+		RepoID:      repoID,
+	})
+	if err != nil {
+		return nil, fmt.Errorf("db.Find[Collaboration]: %w", err)
+	}
+
+	collaborators := make([]*Collaborator, 0, len(collaborations))
+	userIDs := make([]int64, 0, len(collaborations))
+	for _, c := range collaborations {
+		userIDs = append(userIDs, c.UserID)
+	}
+
+	usersMap := make(map[int64]*user_model.User)
+	if err := db.GetEngine(ctx).In("id", userIDs).Find(&usersMap); err != nil {
+		return nil, fmt.Errorf("Find users map by user ids: %w", err)
+	}
+
+	for _, c := range collaborations {
+		u := usersMap[c.UserID]
+		if u == nil {
+			u = user_model.NewGhostUser()
+		}
+		collaborators = append(collaborators, &Collaborator{
+			User:          u,
+			Collaboration: c,
+		})
+	}
+	return collaborators, nil
+}
+
+// GetCollaboration get collaboration for a repository id with a user id
+func GetCollaboration(ctx context.Context, repoID, uid int64) (*Collaboration, error) {
+	collaboration := &Collaboration{
+		RepoID: repoID,
+		UserID: uid,
+	}
+	has, err := db.GetEngine(ctx).Get(collaboration)
+	if !has {
+		collaboration = nil
+	}
+	return collaboration, err
+}
+
+// IsCollaborator check if a user is a collaborator of a repository
+func IsCollaborator(ctx context.Context, repoID, userID int64) (bool, error) {
+	return db.GetEngine(ctx).Get(&Collaboration{RepoID: repoID, UserID: userID})
+}
+
+type FindCollaborationOptions struct {
+	db.ListOptions
+	RepoID int64
+}
+
+func (opts FindCollaborationOptions) ToConds() builder.Cond {
+	return builder.And(builder.Eq{"repo_id": opts.RepoID})
+}
+
+// ChangeCollaborationAccessMode sets new access mode for the collaboration.
+func ChangeCollaborationAccessMode(ctx context.Context, repo *Repository, uid int64, mode perm.AccessMode) error {
+	// Discard invalid input
+	if mode <= perm.AccessModeNone || mode > perm.AccessModeOwner {
+		return nil
+	}
+
+	return db.WithTx(ctx, func(ctx context.Context) error {
+		e := db.GetEngine(ctx)
+
+		collaboration := &Collaboration{
+			RepoID: repo.ID,
+			UserID: uid,
+		}
+		has, err := e.Get(collaboration)
+		if err != nil {
+			return fmt.Errorf("get collaboration: %w", err)
+		} else if !has {
+			return nil
+		}
+
+		if collaboration.Mode == mode {
+			return nil
+		}
+		collaboration.Mode = mode
+
+		if _, err = e.
+			ID(collaboration.ID).
+			Cols("mode").
+			Update(collaboration); err != nil {
+			return fmt.Errorf("update collaboration: %w", err)
+		} else if _, err = e.Exec("UPDATE access SET mode = ? WHERE user_id = ? AND repo_id = ?", mode, uid, repo.ID); err != nil {
+			return fmt.Errorf("update access table: %w", err)
+		}
+
+		return nil
+	})
+}
+
+// GetCollaboratorWithUser returns all collaborator IDs of collabUserID on
+// repositories of ownerID.
+func GetCollaboratorWithUser(ctx context.Context, ownerID, collabUserID int64) ([]int64, error) {
+	collabsID := make([]int64, 0, 8)
+	err := db.GetEngine(ctx).Table("collaboration").Select("collaboration.`id`").
+		Join("INNER", "repository", "repository.id = collaboration.repo_id").
+		Where("repository.`owner_id` = ?", ownerID).
+		And("collaboration.`user_id` = ?", collabUserID).
+		Find(&collabsID)
+
+	return collabsID, err
+}
+
+// IsOwnerMemberCollaborator checks if a provided user is the owner, a collaborator or a member of a team in a repository
+func IsOwnerMemberCollaborator(ctx context.Context, repo *Repository, userID int64) (bool, error) {
+	if repo.OwnerID == userID {
+		return true, nil
+	}
+	teamMember, err := db.GetEngine(ctx).Join("INNER", "team_repo", "team_repo.team_id = team_user.team_id").
+		Join("INNER", "team_unit", "team_unit.team_id = team_user.team_id").
+		Where("team_repo.repo_id = ?", repo.ID).
+		And("team_unit.`type` = ?", unit.TypeCode).
+		And("team_user.uid = ?", userID).Table("team_user").Exist()
+	if err != nil {
+		return false, err
+	}
+	if teamMember {
+		return true, nil
+	}
+
+	return db.GetEngine(ctx).Get(&Collaboration{RepoID: repo.ID, UserID: userID})
+}