<?php
/*
  A set of utilities for tracking text-based game releases
  Copyright (C) 2017-2018  Alexander Yakovlev

  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
namespace Oreolek\Source;

use \Oreolek\Game;
use \Oreolek\Source;
use \Pandoc\Pandoc;

class Itch extends Source {
  public $title = "Itch.io";
  public $queue = [];
  public $games = [];
  public $print_description = FALSE;
  protected function parse_tag($url) {
    $max_pages = 4; // load 30*4 = 120 latest games
    for ($i = 1; $i <= $max_pages; $i++) {
      $cururl = $url.'?format=json&page='.$i; 
      $text = $this->get_json($cururl);
      $this->loadStr($text->content);
      $this->dom->filter('.game_cell')->each(function($cell) {
        $game = new Game;
        $game->url = $cell->filter('a.game_link')->attr('href');
        $game->title = $cell->filter('a.title')->text();
        $game->author = $cell->filter('.game_author')->text();
        $game->image = $cell->filter('.game_thumb')->attr('data-background_image');
        $this->queue[] = $game;
      });
      if ($text->num_items < 30) {
        // less than default number of games, probably last page
        break;
      }
    }
  }
  protected function parse() {
    global $argv;
    if (!$this->period instanceof \DateTime) {
      $this->period = new \DateTime('@'.$this->period);
    }
    if (isset($argv[2])) {
      $game_page = $this->get_text($argv[2]);
      $this->loadStr($game_page, []);
      $this->output .= $this->page($argv[2])->print();
    } else {
      $this->parse_tag("https://itch.io/games/newest/tag-text-based");
      $this->parse_tag("https://itch.io/games/newest/tag-twine");
      $this->parse_tag("https://itch.io/games/newest/tag-interactive-fiction");
      $this->queue = array_unique($this->queue);
      foreach ($this->queue as $game) {
        $game_page = $this->get_text($game->url);
        $this->loadStr($game_page, []);
        $game = $this->page($game->url);
        if ($game->date < $this->period) {
          continue;
        }
        $this->games[] = $game->print();
      }
      $this->games = array_unique($this->games);
      foreach ($this->games as $game) {
        $this->output .= $game;
      }
    }
  }
  public function checkPage($url) {
    return (strpos($url,'.itch.io/') !== FALSE);
  }
  public function page($url) {
    $game = new Game;
    $game->url = $url;
    $title = trim($this->dom->filter("title")->first()->text());
    [$game->title, $game->author] = explode(' by ', $title);
    unset($title);
    $this->dom->filter('script[type="application/ld+json"]')->each(function($script) use(&$game) {
      $data = json_decode($script->html());
      if ($data === false) {
        return;
      }
      if ($data->{'@type'} === 'Product') {
        if (isset($data->description)) {
          $game->short_description = $data->description;
        }
        if (isset($data->name)) {
          $game->title = $data->name;
        }
        if (isset($data->offers) && isset($data->offers->seller)) {
          $game->author = $data->offers->seller->name;
        }
      }
    });
    $date = $this->dom->filter('td abbr');
    if ($date->count() > 0) {
      $date = $date->first()->attr('title');
      $date = str_replace('@', '', $date);
      $game->date = new \DateTime($date);
    }
    if ($this->print_description) {
      $desc = $this->dom->filter('.formatted_description');
      try {
        $game->description = trim($desc->first()->html());
      } catch (\Throwable $e) {
      }
      if (empty($game->short_description)) {
        $converter = new Pandoc();
        $description = $converter->convert($game->description, 'html', 'mediawiki');
        $description = explode(' ',$description);
        // 50 first words
        $game->short_description = implode(' ', array_slice($description, 0, 50));
      }
    }
    return $game;
  }
}