<?php
/**
 * Runs during composer execution to help keep our Core library in same space as project.
 *
 * If initial run, everything proceeds and normal, and then vendor/mytrus/Core
 * is moved to src/Mytrus/Core.
 *
 * If previously run, or src/Mytrus/Core already exists, nothing is overwritten.
 *
 * Also overwrites the default phpunit bin file in vendor/bin/phpunit to fix some
 * issues.
 *
 * Last Commit Date: $Date: 2014-01-23 10:41:47 -0800 (Thu, 23 Jan 2014) $
 * Revision:         $Revision: 14411 $
 * Author:           $Author: jtreminio $
 * File:             $HeadURL: https://jira.mytrus.com/svn/ODY/trunk/site/src/Mytrus/Installer.php $
 *
 * @copyright Copyright (c) 2013 Mytrus, Inc. (http://www.mytrus.com)
 */

namespace Mytrus;

use Composer\Script\Event;

abstract class Installer
{
    static private $initialInstall = false;

    static public function postInstall(Event $event)
    {
        $twigCache = __DIR__ . '/../../twig.cache';

        if (!is_dir($twigCache)) {
            if (!mkdir($twigCache, 0777)) {
                throw new \Exception('Twig cache directory could not be created');
            }
        }

        if (!is_writable($twigCache)) {
            if (!chmod($twigCache, 0777)) {
                throw new \Exception('Twig cache directory could not be made writable');
            }
        }

        $vendorDir = realpath($event->getComposer()->getConfig()->get('vendor-dir'));
        $baseDir = $vendorDir . '/../';
        $coreRepoLoc = $baseDir . 'src/Mytrus/Core';

        if (is_dir($coreRepoLoc)) {
            $event->getIO()->write(
                "<warning>Core exists at {$coreRepoLoc} and will not be overwritten.</warning>"
            );

            $vendorPhpunit = "{$vendorDir}/bin/phpunit";
            if (is_link($vendorPhpunit) || !is_file($vendorPhpunit)) {
                $event->getIO()->write(
                    "<warning>Replacing the vendor-provided phpunit bin</warning>"
                );

                shell_exec("rm -f {$vendorPhpunit} && cp -f {$coreRepoLoc}/Config/bin/phpunit {$vendorPhpunit}");
            }

            return;
        }

        static::$initialInstall = true;

        shell_exec("mv {$vendorDir}/mytrus/core {$coreRepoLoc}");
    }

    /**
     * @param Event $event
     *
     * @throws \Exception when extra configuration is not defined properly
     */
    static public function preUpdate(Event $event)
    {
        $vendorDir = realpath($event->getComposer()->getConfig()->get('vendor-dir'));
        $baseDir = $vendorDir . '/../';
        $coreRepoLoc = $baseDir . 'src/Mytrus/Core';

        // Only throw exception if this isn't an initial $ composer install
        if (is_dir($coreRepoLoc) && !static::$initialInstall) {
            $event->getIO()->write(
                "<warning>Core exists at {$coreRepoLoc} and will not be overwritten.</warning>"
            );
        }
    }
}