gen_release

#!/usr/bin/env php
<?php

/**
 * Template for migration
 */
$template = "<?php

use App\Configs;
use Illuminate\Database\Migrations\Migration;

class BumpVersion%s extends Migration
{
	/**
	 * Run the migrations.
	 *
	 * @return void
	 */
	public function up()
	{
		Configs::where('key', 'version')->update(['value' => '%s']);
	}

	/**
	 * Reverse the migrations.
	 *
	 * @return void
	 */
	public function down()
	{
		Configs::where('key', 'version')->update(['value' => '%s']);
	}
}
";

/**
 * We get the current version number
 * 
 * @return array
 */
function get_version()
{
    $str_CurrentVersion = @file_get_contents('version.md');
    if (!$str_CurrentVersion)
    {
        throw new Exception("unable to find current version number in version.md\n");
    }
    $arr_CurrentVersion = array_map('intval', explode('.', $str_CurrentVersion));
    if (count($arr_CurrentVersion) != 3)
    {
        throw new Exception("invalid version number");
    }

    return $arr_CurrentVersion;
}

/**
 * Given the current version and the update array return the new version number
 * 
 * @param array $curr_version : current version number
 * @param string $kind : 'minor' or 'major'
 * 
 * @return array
 */
function new_version(array $curr_version, string $kind)
{
    $new_version = $curr_version;
    switch ($kind){
        case 'major':
            if ($curr_version[1] == 99)
            {
                throw new Exception("Maybe it is time for a big change?");
            }
            $new_version[1] += 1;
            $new_version[2] = 0;
        break;
        case 'minor':
        default:
            if ($curr_version[2] == 99)
            {
                throw new Exception("Maybe it is time for a major release?");
            }
            $new_version[2] += 1;
        break;
    }

    return $new_version;
}

/**
 * encode $version into a string of 6 digits
 * 
 * @return string
 */
function str_version(array $version)
{
    return sprintf("%02d%02d%02d",$version[0], $version[1], $version[2]);
}

/**
 * Check if migration with same name already exists
 */
function does_migration_exists(string $version)
{
    $name_candidate = 'bump_version'.$version;
    $migrations = array_slice(scandir('database/migrations'), 2);
    foreach ($migrations as $migration) {
        // given 2020_04_22_155712_bump_version040002.php we retrieve bump_version040002
        $name = explode("_",$migration,5);
        $name = substr($name[4],0,-4); 
        if($name == $name_candidate) {
            throw new Exception('Migration '.$name_candidate.' already exsists!');
        }
    }
}

$kind = $argv[1] ?? 'minor';

try {
    $cv = get_version();
    $nv = new_version($cv, $kind);
    
    $str_cv = str_version($cv);
    $str_nv = str_version($nv);

    does_migration_exists($str_nv);

    $fileName = sprintf('database/migrations/%s_bump_version%s.php',date('Y_m_d_His'), $str_nv);
    $fileContent = sprintf($template, $str_nv, $str_nv, $str_cv);

    file_put_contents($fileName, $fileContent);
    echo "Migration generated!\n";

    file_put_contents('version.md', implode('.',$nv));
    echo "version.md updated!\n";

    exit;
}
catch (Exception $e)
{
    exit("\e[0;31m".$e->getMessage()."\e[0m\n");
}