<?php

namespace LakeDrops\Component\Composer;

/**
 * Manages composer.json files.
 */
final class Utils {

  /**
   * @var string[]
   */
  private static $ignoredGitPatterns;

  /**
   * @var string
   */
  private static $lfsGitPatterns;

  /**
   * Make sure that git init was called.
   */
  protected static function gitInit(): void {
    if (!file_exists('.git')) {
      passthru(escapeshellcmd('git init'));
    }
  }

  /**
   * @param string $command
   */
  public static function git(string $command): void {
    self::gitInit();
    passthru(escapeshellcmd('git -c "user.email=composer@lakedrops.com" ' . $command));
  }

  /**
   * @param string $pattern
   */
  public static function gitIgnore(string $pattern): void {
    if (self::$ignoredGitPatterns === NULL) {
      if (file_exists('.gitignore')) {
        self::$ignoredGitPatterns = explode(PHP_EOL, file_get_contents('.gitignore'));
      }
      else {
        self::$ignoredGitPatterns = [];
      }
    }

    if (in_array($pattern, self::$ignoredGitPatterns, TRUE)) {
      return;
    }

    self::$ignoredGitPatterns[] = $pattern;
    self::git('ignore ' . $pattern);
  }

  /**
   * @param string $pattern
   */
  public static function gitLFS(string $pattern): void {
    if (self::$lfsGitPatterns === NULL) {
      self::gitInit();
      $output = [];
      exec('git lfs track', $output);
      self::$lfsGitPatterns = implode(PHP_EOL, $output);
    }

    if (strpos(self::$lfsGitPatterns, $pattern)) {
      return;
    }

    self::$lfsGitPatterns = $pattern . PHP_EOL;
    self::git('lfs track ' . $pattern);
  }

}