1 files changed, 170 insertions, 0 deletions
diff --git a/models/packages/conan/references.go b/models/packages/conan/references.go
new file mode 100644
index 0000000..0d888a1
--- /dev/null
+++ b/models/packages/conan/references.go
@@ -0,0 +1,170 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package conan
+
+import (
+	"context"
+	"strconv"
+	"strings"
+
+	"code.gitea.io/gitea/models/db"
+	"code.gitea.io/gitea/models/packages"
+	conan_module "code.gitea.io/gitea/modules/packages/conan"
+	"code.gitea.io/gitea/modules/timeutil"
+	"code.gitea.io/gitea/modules/util"
+
+	"xorm.io/builder"
+)
+
+var (
+	ErrRecipeReferenceNotExist  = util.NewNotExistErrorf("recipe reference does not exist")
+	ErrPackageReferenceNotExist = util.NewNotExistErrorf("package reference does not exist")
+)
+
+// RecipeExists checks if a recipe exists
+func RecipeExists(ctx context.Context, ownerID int64, ref *conan_module.RecipeReference) (bool, error) {
+	revisions, err := GetRecipeRevisions(ctx, ownerID, ref)
+	if err != nil {
+		return false, err
+	}
+
+	return len(revisions) != 0, nil
+}
+
+type PropertyValue struct {
+	Value       string
+	CreatedUnix timeutil.TimeStamp
+}
+
+func findPropertyValues(ctx context.Context, propertyName string, ownerID int64, name, version string, propertyFilter map[string]string) ([]*PropertyValue, error) {
+	var propsCond builder.Cond = builder.Eq{
+		"package_property.ref_type": packages.PropertyTypeFile,
+	}
+	propsCond = propsCond.And(builder.Expr("package_property.ref_id = package_file.id"))
+
+	propsCondBlock := builder.NewCond()
+	for name, value := range propertyFilter {
+		propsCondBlock = propsCondBlock.Or(builder.Eq{
+			"package_property.name":  name,
+			"package_property.value": value,
+		})
+	}
+	propsCond = propsCond.And(propsCondBlock)
+
+	var cond builder.Cond = builder.Eq{
+		"package.type":                    packages.TypeConan,
+		"package.owner_id":                ownerID,
+		"package.lower_name":              strings.ToLower(name),
+		"package_version.lower_version":   strings.ToLower(version),
+		"package_version.is_internal":     false,
+		strconv.Itoa(len(propertyFilter)): builder.Select("COUNT(*)").Where(propsCond).From("package_property"),
+	}
+
+	in2 := builder.
+		Select("package_file.id").
+		From("package_file").
+		InnerJoin("package_version", "package_version.id = package_file.version_id").
+		InnerJoin("package", "package.id = package_version.package_id").
+		Where(cond)
+
+	query := builder.
+		Select("package_property.value, MAX(package_file.created_unix) AS created_unix").
+		From("package_property").
+		InnerJoin("package_file", "package_file.id = package_property.ref_id").
+		Where(builder.Eq{"package_property.name": propertyName}.And(builder.In("package_property.ref_id", in2))).
+		GroupBy("package_property.value").
+		OrderBy("created_unix DESC")
+
+	var values []*PropertyValue
+	return values, db.GetEngine(ctx).SQL(query).Find(&values)
+}
+
+// GetRecipeRevisions gets all revisions of a recipe
+func GetRecipeRevisions(ctx context.Context, ownerID int64, ref *conan_module.RecipeReference) ([]*PropertyValue, error) {
+	values, err := findPropertyValues(
+		ctx,
+		conan_module.PropertyRecipeRevision,
+		ownerID,
+		ref.Name,
+		ref.Version,
+		map[string]string{
+			conan_module.PropertyRecipeUser:    ref.User,
+			conan_module.PropertyRecipeChannel: ref.Channel,
+		},
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return values, nil
+}
+
+// GetLastRecipeRevision gets the latest recipe revision
+func GetLastRecipeRevision(ctx context.Context, ownerID int64, ref *conan_module.RecipeReference) (*PropertyValue, error) {
+	revisions, err := GetRecipeRevisions(ctx, ownerID, ref)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(revisions) == 0 {
+		return nil, ErrRecipeReferenceNotExist
+	}
+	return revisions[0], nil
+}
+
+// GetPackageReferences gets all package references of a recipe
+func GetPackageReferences(ctx context.Context, ownerID int64, ref *conan_module.RecipeReference) ([]*PropertyValue, error) {
+	values, err := findPropertyValues(
+		ctx,
+		conan_module.PropertyPackageReference,
+		ownerID,
+		ref.Name,
+		ref.Version,
+		map[string]string{
+			conan_module.PropertyRecipeUser:     ref.User,
+			conan_module.PropertyRecipeChannel:  ref.Channel,
+			conan_module.PropertyRecipeRevision: ref.Revision,
+		},
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return values, nil
+}
+
+// GetPackageRevisions gets all revision of a package
+func GetPackageRevisions(ctx context.Context, ownerID int64, ref *conan_module.PackageReference) ([]*PropertyValue, error) {
+	values, err := findPropertyValues(
+		ctx,
+		conan_module.PropertyPackageRevision,
+		ownerID,
+		ref.Recipe.Name,
+		ref.Recipe.Version,
+		map[string]string{
+			conan_module.PropertyRecipeUser:       ref.Recipe.User,
+			conan_module.PropertyRecipeChannel:    ref.Recipe.Channel,
+			conan_module.PropertyRecipeRevision:   ref.Recipe.Revision,
+			conan_module.PropertyPackageReference: ref.Reference,
+		},
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return values, nil
+}
+
+// GetLastPackageRevision gets the latest package revision
+func GetLastPackageRevision(ctx context.Context, ownerID int64, ref *conan_module.PackageReference) (*PropertyValue, error) {
+	revisions, err := GetPackageRevisions(ctx, ownerID, ref)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(revisions) == 0 {
+		return nil, ErrPackageReferenceNotExist
+	}
+	return revisions[0], nil
+}