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// Copyright 2019 clair authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package layer
import (
"database/sql"
"sort"
"github.com/coreos/clair/database/pgsql/namespace"
"github.com/coreos/clair/database"
"github.com/coreos/clair/database/pgsql/detector"
"github.com/coreos/clair/database/pgsql/feature"
"github.com/coreos/clair/database/pgsql/util"
)
const findLayerFeatures = `
SELECT
f.name, f.version, f.version_format, ft.name, lf.detector_id, ns.name, ns.version_format
FROM
layer_feature AS lf
LEFT JOIN feature f on f.id = lf.feature_id
LEFT JOIN feature_type ft on ft.id = f.type
LEFT JOIN namespace ns ON ns.id = lf.namespace_id
WHERE lf.layer_id = $1`
func queryPersistLayerFeature(count int) string {
return util.QueryPersist(count,
"layer_feature",
"layer_feature_layer_id_feature_id_namespace_id_key",
"layer_id",
"feature_id",
"detector_id",
"namespace_id")
}
// dbLayerFeature represents the layer_feature table
type dbLayerFeature struct {
layerID int64
featureID int64
detectorID int64
namespaceID sql.NullInt64
}
func FindLayerFeatures(tx *sql.Tx, layerID int64, detectors detector.DetectorMap) ([]database.LayerFeature, error) {
rows, err := tx.Query(findLayerFeatures, layerID)
if err != nil {
return nil, util.HandleError("findLayerFeatures", err)
}
defer rows.Close()
features := []database.LayerFeature{}
for rows.Next() {
var (
detectorID int64
feature database.LayerFeature
)
var namespaceName, namespaceVersion sql.NullString
if err := rows.Scan(&feature.Name, &feature.Version, &feature.VersionFormat, &feature.Type, &detectorID, &namespaceName, &namespaceVersion); err != nil {
return nil, util.HandleError("findLayerFeatures", err)
}
feature.PotentialNamespace.Name = namespaceName.String
feature.PotentialNamespace.VersionFormat = namespaceVersion.String
feature.By = detectors.ByID[detectorID]
features = append(features, feature)
}
return features, nil
}
func PersistAllLayerFeatures(tx *sql.Tx, layerID int64, features []database.LayerFeature) error {
detectorMap, err := detector.FindAllDetectors(tx)
if err != nil {
return err
}
var namespaces []database.Namespace
for _, feature := range features {
namespaces = append(namespaces, feature.PotentialNamespace)
}
nameSpaceIDs, _ := namespace.FindNamespaceIDs(tx, namespaces)
featureNamespaceMap := map[database.Namespace]sql.NullInt64{}
rawFeatures := make([]database.Feature, 0, len(features))
for i, f := range features {
rawFeatures = append(rawFeatures, f.Feature)
if f.PotentialNamespace.Valid() {
featureNamespaceMap[f.PotentialNamespace] = nameSpaceIDs[i]
}
}
featureIDs, err := feature.FindFeatureIDs(tx, rawFeatures)
if err != nil {
return err
}
var namespaceID sql.NullInt64
dbFeatures := make([]dbLayerFeature, 0, len(features))
for i, f := range features {
detectorID := detectorMap.ByValue[f.By]
featureID := featureIDs[i].Int64
if !featureIDs[i].Valid {
return database.ErrMissingEntities
}
namespaceID = featureNamespaceMap[f.PotentialNamespace]
dbFeatures = append(dbFeatures, dbLayerFeature{layerID, featureID, detectorID, namespaceID})
}
if err := PersistLayerFeatures(tx, dbFeatures); err != nil {
return err
}
return nil
}
func PersistLayerFeatures(tx *sql.Tx, features []dbLayerFeature) error {
if len(features) == 0 {
return nil
}
sort.Slice(features, func(i, j int) bool {
return features[i].featureID < features[j].featureID
})
keys := make([]interface{}, 0, len(features)*4)
for _, f := range features {
keys = append(keys, f.layerID, f.featureID, f.detectorID, f.namespaceID)
}
_, err := tx.Exec(queryPersistLayerFeature(len(features)), keys...)
if err != nil {
return util.HandleError("queryPersistLayerFeature", err)
}
return nil
}
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