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/*
* Copyright 2019 original authors
* SPDX-License-Identifier: Apache-2.0
*/
package yakworks.commons.beans

import groovy.transform.CompileStatic

/**
 * helpers to transform one type to another
 *
 * @author Joshua Burnett (@basejump)
 */
@CompileStatic
class Transform {

    /**
     * simple util that collects a list into a Long list
     */
    static List toIntList(List dataList){
        if(!dataList) return []
        return dataList.collect { it as Integer }
    }

    /**
     * simple util that collects a list into a Long list
     */
    static List toLongList(List dataList){
        if(!dataList) return []
        return dataList.collect { it as Long }
    }

    /**
     * simple util that collects a list of objects or maps as Long list,
     * can pass in idPropName for the field to collect
     */
    static List objectToLongList(List dataList, String idPropName = 'id'){
        if(!dataList) return []
        return dataList.collect { it[idPropName] as Long }
    }

    /**
     * converts a list of long ids to a list of maps with id key
     * so [1,2,3] would be converted to [[id:1], [id:2], [id:3]]
     * can also pass in a different key with idPropName
     */
    static List listToIdMap(List idList, String idPropName = 'id'){
        idList.collect { [(idPropName): it] } as List
    }

    /**
     * converts a list of objects with id to a list of maps with id key
     * so [1,2,3] would be converted to [[id:1], [id:2], [id:3]]
     * can also pass in a different key with idPropName
     */
    static List objectListToIdMapList(List entityList){
        entityList.collect { [id: it['id']] } as List
    }

}