/**
 * ZLIB packer
 * @see http://localhost/src/ZLIB.php
 * @requires pako `npm i pako @types/pako`
 */
class ZLIB {
    /**
     * Base64 decode from php
     * @param {Uint8Array} arr
     */
    static atos(arr) {
        for (var i = 0, l = arr.length, s = '', c; c = arr[i++];)
            s += String.fromCharCode(
                c > 0xdf && c < 0xf0 && i < l - 1 ?
                    (c & 0xf) << 12 | (arr[i++] & 0x3f) << 6 | arr[i++] & 0x3f :
                    c > 0x7f && i < l ?
                        (c & 0x1f) << 6 | arr[i++] & 0x3f :
                        c
            );
        return s;
    }

    static decompress(str) {
        var dec = this.atos(pako.ungzip(base64_decode(str)));
        console.log({
            'ZLIB.decompress': {
                target: str,
                result: dec
            }
        });
        return dec;
    }

    static compress(str) {
        var enc = pako.gzip(str, {
            to: 'string'
        });
        enc = base64_encode(enc);
        console.log({
            'ZLIB.compress': {
                target: str,
                result: enc
            }
        });
        return enc;
    }
}