add Group methods and helper functions

models/group/group.go

@@ -3,20 +3,25 @@ package group
 import (
 	"code.gitea.io/gitea/models/db"
 	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/util"
+	"context"
+	"errors"
+	"fmt"
+	"xorm.io/builder"
 )
 
 // Group represents a group of repositories for a user or organization
 type Group struct {
-	ID          int64 `xorm:"pk autoincr"`
-	OwnerID     int64 `xorm:"UNIQUE(s) index"`
-	OwnerName   string
+	ID          int64            `xorm:"pk autoincr"`
+	OwnerID     int64            `xorm:"UNIQUE(s) index NOT NULL"`
 	Owner       *user_model.User `xorm:"-"`
 	LowerName   string           `xorm:"UNIQUE(s) INDEX NOT NULL"`
 	Name        string           `xorm:"INDEX NOT NULL"`
+	DisplayName string           `xorm:"TEXT"`
 	Description string           `xorm:"TEXT"`
 
-	ParentGroupID int64    `xorm:"DEFAULT NULL"`
-	SubGroups     []*Group `xorm:"-"`
+	ParentGroupID int64     `xorm:"INDEX DEFAULT NULL"`
+	Subgroups     GroupList `xorm:"-"`
 }
 
 func (Group) TableName() string { return "repo_group" }
@@ -24,3 +29,127 @@ func (Group) TableName() string { return "repo_group" }
 func init() {
 	db.RegisterModel(new(Group))
 }
+
+func (g *Group) doLoadSubgroups(ctx context.Context, recursive bool, currentLevel int) error {
+	if currentLevel >= 20 {
+		return ErrGroupTooDeep{
+			g.ID,
+		}
+	}
+	if g.Subgroups != nil {
+		return nil
+	}
+	var err error
+	g.Subgroups, err = FindGroups(ctx, &FindGroupsOptions{
+		ParentGroupID: g.ID,
+	})
+	if err != nil {
+		return err
+	}
+	if recursive {
+		for _, group := range g.Subgroups {
+			err = group.doLoadSubgroups(ctx, recursive, currentLevel+1)
+			if err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+func (g *Group) LoadSubgroups(ctx context.Context, recursive bool) error {
+	err := g.doLoadSubgroups(ctx, recursive, 0)
+	return err
+}
+
+func (g *Group) LoadAttributes(ctx context.Context) error {
+	err := g.LoadOwner(ctx)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func (g *Group) LoadOwner(ctx context.Context) error {
+	if g.Owner != nil {
+		return nil
+	}
+	var err error
+	g.Owner, err = user_model.GetUserByID(ctx, g.OwnerID)
+	return err
+}
+
+func (g *Group) GetGroupByID(ctx context.Context, id int64) (*Group, error) {
+	group := new(Group)
+
+	has, err := db.GetEngine(ctx).ID(id).Get(g)
+	if err != nil {
+		return nil, err
+	} else if !has {
+		return nil, ErrGroupNotExist{id}
+	}
+	return group, nil
+}
+
+type FindGroupsOptions struct {
+	db.ListOptions
+	OwnerID       int64
+	ParentGroupID int64
+}
+
+func (opts FindGroupsOptions) ToConds() builder.Cond {
+	cond := builder.NewCond()
+	if opts.OwnerID != 0 {
+		cond = cond.And(builder.Eq{"owner_id": opts.OwnerID})
+	}
+	if opts.ParentGroupID != 0 {
+		cond = cond.And(builder.Eq{"parent_group_id": opts.ParentGroupID})
+	} else {
+		cond = cond.And(builder.IsNull{"parent_group_id"})
+	}
+	return cond
+}
+
+func FindGroups(ctx context.Context, opts *FindGroupsOptions) (GroupList, error) {
+	sess := db.GetEngine(ctx).Where(opts.ToConds())
+	if opts.Page > 0 {
+		sess = db.SetSessionPagination(sess, opts)
+	}
+	groups := make([]*Group, 0, 10)
+	return groups, sess.
+		Asc("repo_group.id").
+		Find(&groups)
+}
+
+type ErrGroupNotExist struct {
+	ID int64
+}
+
+// IsErrGroupNotExist checks if an error is a ErrCommentNotExist.
+func IsErrGroupNotExist(err error) bool {
+	var errGroupNotExist ErrGroupNotExist
+	ok := errors.As(err, &errGroupNotExist)
+	return ok
+}
+
+func (err ErrGroupNotExist) Error() string {
+	return fmt.Sprintf("group does not exist [id: %d]", err.ID)
+}
+
+func (err ErrGroupNotExist) Unwrap() error {
+	return util.ErrNotExist
+}
+
+type ErrGroupTooDeep struct {
+	ID int64
+}
+
+func IsErrGroupTooDeep(err error) bool {
+	var errGroupTooDeep ErrGroupTooDeep
+	ok := errors.As(err, &errGroupTooDeep)
+	return ok
+}
+
+func (err ErrGroupTooDeep) Error() string {
+	return fmt.Sprintf("group has reached or exceeded the subgroup nesting limit [id: %d]", err.ID)
+}