database: Add feature_type database model

database/feature_type.go

@@ -0,0 +1,52 @@
+// 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 database
+
+import (
+	"database/sql/driver"
+	"fmt"
+)
+
+// FeatureType indicates the type of feature that a vulnerability
+// affects.
+type FeatureType string
+
+const (
+	SourcePackage FeatureType = "source"
+	BinaryPackage FeatureType = "binary"
+)
+
+var featureTypes = []FeatureType{
+	SourcePackage,
+	BinaryPackage,
+}
+
+// Scan implements the database/sql.Scanner interface.
+func (t *FeatureType) Scan(value interface{}) error {
+	val := value.(string)
+	for _, ft := range featureTypes {
+		if string(ft) == val {
+			*t = ft
+			return nil
+		}
+	}
+
+	panic(fmt.Sprintf("invalid feature type received from database: '%s'", val))
+}
+
+// Value implements the database/sql/driver.Valuer interface.
+func (t *FeatureType) Value() (driver.Value, error) {
+	return string(*t), nil
+}

database/pgsql/feature_type.go

@@ -0,0 +1,53 @@
+// 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 pgsql
+
+import "github.com/coreos/clair/database"
+
+const (
+	selectAllFeatureTypes = `SELECT id, name FROM feature_type`
+)
+
+type featureTypes struct {
+	byID   map[int]database.FeatureType
+	byName map[database.FeatureType]int
+}
+
+func newFeatureTypes() *featureTypes {
+	return &featureTypes{make(map[int]database.FeatureType), make(map[database.FeatureType]int)}
+}
+
+func (tx *pgSession) getFeatureTypeMap() (*featureTypes, error) {
+	rows, err := tx.Query(selectAllFeatureTypes)
+	if err != nil {
+		return nil, err
+	}
+
+	types := newFeatureTypes()
+	for rows.Next() {
+		var (
+			id   int
+			name database.FeatureType
+		)
+		if err := rows.Scan(&id, &name); err != nil {
+			return nil, err
+		}
+
+		types.byID[id] = name
+		types.byName[name] = id
+	}
+
+	return types, nil
+}

database/pgsql/feature_type_test.go

@@ -0,0 +1,38 @@
+// 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 pgsql
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/coreos/clair/database"
+)
+
+func TestGetFeatureTypeMap(t *testing.T) {
+	tx, cleanup := createTestPgSession(t, "TestGetFeatureTypeMap")
+	defer cleanup()
+
+	types, err := tx.getFeatureTypeMap()
+	if err != nil {
+		require.Nil(t, err, err.Error())
+	}
+
+	require.Equal(t, database.SourcePackage, types.byID[1])
+	require.Equal(t, database.BinaryPackage, types.byID[2])
+	require.Equal(t, 1, types.byName[database.SourcePackage])
+	require.Equal(t, 2, types.byName[database.BinaryPackage])
+}