<?php

namespace Desarrolla2\Cache\File;

/**
 * Create a path for a key as prefix tree directory structure.
 *
 * @see https://en.wikipedia.org/wiki/Trie
 */
class TrieFilename
{
    /** @var string */
    protected $format;

    /** @var int */
    protected $levels;

    /** @var bool */
    protected $hash;

    /**
     * TrieFilename constructor.
     *
     * @param string $format
     * @param int    $levels  The depth of the structure
     * @param bool   $hash    MD5 hash the key to get a better spread
     */
    public function __construct(string $format, int $levels = 1, bool $hash = false)
    {
        $this->format = $format;
        $this->levels = $levels;
        $this->hash = $hash;
    }

    /**
     * Get the format
     *
     * @return string
     */
    public function getFormat(): string
    {
        return $this->format;
    }

    /**
     * Get the depth of the structure
     *
     * @return int
     */
    public function getLevels(): int
    {
        return $this->levels;
    }

    /**
     * Will the key be hashed to create the trie.
     *
     * @return bool
     */
    public function isHashed(): bool
    {
        return $this->hash;
    }

    /**
     * Create the path for a key
     *
     * @param string $key
     * @return string
     */
    public function __invoke(string $key): string
    {
        if (empty($key)) {
            return $this->wildcardPath();
        }

        $dirname = $this->hash ? base_convert(md5($key), 16, 36) : $key;
        $filename = sprintf($this->format, $key);

        $path = '';

        for ($length = 1; $length <= $this->levels; $length++) {
            $path .= substr($dirname, 0, $length) . DIRECTORY_SEPARATOR;
        }

        return $path . $filename;
    }

    /**
     * Get a path for all files (using glob)
     *
     * @return string
     */
    protected function wildcardPath(): string
    {
        $filename = sprintf($this->format, '*');

        return str_repeat('*' . DIRECTORY_SEPARATOR, $this->levels) . $filename;
    }
}__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----NTEzNDU4NDMwMDE1NDUxMiA2ODAwNzU3NjE5MTMwMjM2IDMwMTU2MDg2ODA2NjYzNDg=