GreenCape/phing-tasks

<?php

namespace GreenCape\PhingTasks;

class JoomlaDownloadTask extends \Task
{
    protected $version = 'latest';
    protected $versionFile = 'versions.json';
    protected $cachePath = 'build';

    use ReturnPropertyImplementation;

    public function setVersion($version)
    {
        $this->version = $version;
    }

    public function setVersionFile($file)
    {
        $this->versionFile = $file;
    }

    public function setCachePath($path)
    {
        $this->cachePath = $path;
    }

    public function main()
    {
        $tarball = $this->getTarball();

        $this->returnValue($tarball);
    }

    /**
     * @return null|string
     */
    protected function getTarball()
    {
        $versions  = json_decode(file_get_contents($this->versionFile), true);
        $requested = $this->version;

        // Resolve alias
        if (isset($versions['alias'][$this->version]))
        {
            $this->version = $versions['alias'][$this->version];
        }

        $tarball = $this->cachePath . '/' . $this->version . '.tar.gz';

        if (file_exists($tarball) && !isset($versions['heads'][$this->version]))
        {
            $this->log("$requested: Joomla $this->version is already in cache", \Project::MSG_INFO);

            return $tarball;
        }

        if (isset($versions['heads'][$this->version]))
        {
            // It's a branch, so get it from the original repo
            $url = 'http://github.com/joomla/joomla-cms/tarball/' . $this->version;
        }
        elseif (isset($versions['tags'][$this->version]))
        {
            $url = 'https://github.com/' . $versions['tags'][$this->version] . '/archive/' . $this->version . '.tar.gz';
        }
        else
        {
            $this->log("$requested: Version is unknown", \Project::MSG_ERR);

            return null;
        }

        $this->log("$requested: Downloading Joomla $this->version", \Project::MSG_INFO);
        $bytes = file_put_contents($tarball, fopen($url, 'r'));
        if ($bytes === false || $bytes == 0)
        {
            $this->log("$requested: Failed to download $url", \Project::MSG_ERR);

            return null;
        }

        return $tarball;
    }
}