<?php

namespace PharLite;

use Symfony\Component\Finder\Finder;


class Manifest implements \IteratorAggregate, \Countable
{
    /** @var string Root directory of the project being built */
    protected $root;
    /** @var ManifestObject[] The included objects */
    protected $objects = [];

    protected $excluded = [];

    public function __construct($root)
    {
        $this->root = $root;
    }

    public function setExcluded(array $patterns=[])
    {
        $this->excluded = $patterns;
    }

    public function addDirectory($path, callable $filter=null)
    {
        $path = rtrim($path, DIRECTORY_SEPARATOR);
        $obj = (new Finder)->files()->in($path);
        foreach ($obj as $o) {
            if (is_callable($filter) && (false === $filter($o))) {
                continue;
            }
            $path = $o->getPathname();
            $this->addFile($path);
        }
    }

    public function addFile($file)
    {
        // Don't add the file if it matches an excluded pattern
        if ($this->excluded) foreach ($this->excluded as $p) {
            if (fnmatch($p, $file)) return;
        }

        // Figure out local path name
        if (strpos($file, $this->root) === 0) {
            $local = substr($file, 0, strlen($this->root));
        } else {
            $local = $file;
        }

        // Add object to manifest
        $this->objects[] = new ManifestObject($file, $local);
    }

    public function getIterator()
    {
        return new \ArrayIterator($this->objects);
    }

    public function count()
    {
        return count($this->objects);
    }

}