File functions/currencies.php

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<?php

/**
 * Functies m.b.t. valuta's
 * 
 * @copyright 2019 SIW Internationale Vrijwilligersprojecten
 */

use SIW\Data\Currency;

/**
 * Geeft een array met valuta's terug
 * 
 * @since     3.0.0
 *
 * @param string $index
 * @return Currency[]
 */
function siw_get_currencies() {

    $currencies = wp_cache_get( "currencies", 'siw_currencies' );
    if ( false !== $currencies ) {
        return $currencies;
    }

    //Data ophalen en sorteren
    $data = siw_get_data( 'currencies' );
    $data = wp_list_sort( $data, 'name' );

    //Gebruik iso als index van array
    $data = array_column( $data , null, 'iso' );

    //Creëer objecten
    $currencies = array_map(
        function( $item ) {
            return new Currency( $item );
        },
        $data
    );
    wp_cache_set( "currencies", $currencies, 'siw_currencies' );

    return $currencies;
}

/**
 * Geeft informatie over een valuta terug
 * 
 * @since     3.0.0
 *
 * @return Currency
 */
function siw_get_currency( string $currency ) {
    $currencies = siw_get_currencies();
    return $currencies[ $currency ] ?? false;
}

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