1 files changed, 121 insertions, 0 deletions
diff --git a/models/packages/package_property.go b/models/packages/package_property.go
new file mode 100644
index 0000000..e017001
--- /dev/null
+++ b/models/packages/package_property.go
@@ -0,0 +1,121 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package packages
+
+import (
+	"context"
+
+	"code.gitea.io/gitea/models/db"
+
+	"xorm.io/builder"
+)
+
+func init() {
+	db.RegisterModel(new(PackageProperty))
+}
+
+type PropertyType int64
+
+const (
+	// PropertyTypeVersion means the reference is a package version
+	PropertyTypeVersion PropertyType = iota // 0
+	// PropertyTypeFile means the reference is a package file
+	PropertyTypeFile // 1
+	// PropertyTypePackage means the reference is a package
+	PropertyTypePackage // 2
+)
+
+// PackageProperty represents a property of a package, version or file
+type PackageProperty struct {
+	ID      int64        `xorm:"pk autoincr"`
+	RefType PropertyType `xorm:"INDEX NOT NULL"`
+	RefID   int64        `xorm:"INDEX NOT NULL"`
+	Name    string       `xorm:"INDEX NOT NULL"`
+	Value   string       `xorm:"TEXT NOT NULL"`
+}
+
+// InsertProperty creates a property
+func InsertProperty(ctx context.Context, refType PropertyType, refID int64, name, value string) (*PackageProperty, error) {
+	pp := &PackageProperty{
+		RefType: refType,
+		RefID:   refID,
+		Name:    name,
+		Value:   value,
+	}
+
+	_, err := db.GetEngine(ctx).Insert(pp)
+	return pp, err
+}
+
+// GetProperties gets all properties
+func GetProperties(ctx context.Context, refType PropertyType, refID int64) ([]*PackageProperty, error) {
+	pps := make([]*PackageProperty, 0, 10)
+	return pps, db.GetEngine(ctx).Where("ref_type = ? AND ref_id = ?", refType, refID).Find(&pps)
+}
+
+// GetPropertiesByName gets all properties with a specific name
+func GetPropertiesByName(ctx context.Context, refType PropertyType, refID int64, name string) ([]*PackageProperty, error) {
+	pps := make([]*PackageProperty, 0, 10)
+	return pps, db.GetEngine(ctx).Where("ref_type = ? AND ref_id = ? AND name = ?", refType, refID, name).Find(&pps)
+}
+
+// UpdateProperty updates a property
+func UpdateProperty(ctx context.Context, pp *PackageProperty) error {
+	_, err := db.GetEngine(ctx).ID(pp.ID).Update(pp)
+	return err
+}
+
+// DeleteAllProperties deletes all properties of a ref
+func DeleteAllProperties(ctx context.Context, refType PropertyType, refID int64) error {
+	_, err := db.GetEngine(ctx).Where("ref_type = ? AND ref_id = ?", refType, refID).Delete(&PackageProperty{})
+	return err
+}
+
+// DeletePropertyByID deletes a property
+func DeletePropertyByID(ctx context.Context, propertyID int64) error {
+	_, err := db.GetEngine(ctx).ID(propertyID).Delete(&PackageProperty{})
+	return err
+}
+
+// DeletePropertyByName deletes properties by name
+func DeletePropertyByName(ctx context.Context, refType PropertyType, refID int64, name string) error {
+	_, err := db.GetEngine(ctx).Where("ref_type = ? AND ref_id = ? AND name = ?", refType, refID, name).Delete(&PackageProperty{})
+	return err
+}
+
+type DistinctPropertyDependency struct {
+	Name  string
+	Value string
+}
+
+// GetDistinctPropertyValues returns all distinct property values for a given type.
+// Optional: Search only in dependence of another property.
+func GetDistinctPropertyValues(ctx context.Context, packageType Type, ownerID int64, refType PropertyType, propertyName string, dep *DistinctPropertyDependency) ([]string, error) {
+	var cond builder.Cond = builder.Eq{
+		"package_property.ref_type": refType,
+		"package_property.name":     propertyName,
+		"package.type":              packageType,
+		"package.owner_id":          ownerID,
+	}
+	if dep != nil {
+		innerCond := builder.
+			Expr("pp.ref_id = package_property.ref_id").
+			And(builder.Eq{
+				"pp.ref_type": refType,
+				"pp.name":     dep.Name,
+				"pp.value":    dep.Value,
+			})
+		cond = cond.And(builder.Exists(builder.Select("pp.ref_id").From("package_property pp").Where(innerCond)))
+	}
+
+	values := make([]string, 0, 5)
+	return values, db.GetEngine(ctx).
+		Table("package_property").
+		Distinct("package_property.value").
+		Join("INNER", "package_file", "package_file.id = package_property.ref_id").
+		Join("INNER", "package_version", "package_version.id = package_file.version_id").
+		Join("INNER", "package", "package.id = package_version.package_id").
+		Where(cond).
+		Find(&values)
+}