// 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"
	"encoding/json"
)

// MetadataMap is for storing the metadata returned by vulnerability database.
type MetadataMap map[string]interface{}

func (mm *MetadataMap) Scan(value interface{}) error {
	if value == nil {
		return nil
	}

	// github.com/lib/pq decodes TEXT/VARCHAR fields into strings.
	val, ok := value.(string)
	if !ok {
		panic("got type other than []byte from database")
	}
	return json.Unmarshal([]byte(val), mm)
}

func (mm *MetadataMap) Value() (driver.Value, error) {
	json, err := json.Marshal(*mm)
	return string(json), err
}