<?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:----NjQyODgwNDM4MDEzNzU2NSAzODI4NzI0ODM3NjU3MDY5IDkwNzMwNzQwNDA0MTU5NjE=