ElfQuest comics downloader

.gitignore

/data/

elfquest.php

<?php

function __autoload($className)
{
    $fileName = dirname(__FILE__) . '/' . $className . '.php';
    if (file_exists($fileName)) {
        require_once $fileName;
    }
}

$questId = $argv[1];
$startChapter = $argv[2];

$factory = new QuestDataFactory();
if (! $factory->isKnown($questId)) {
    print "Unknown quest id '$questId'\n";
    exit;
}
$questData = $factory->produce($questId);
$downloader = new ElfQuestDownloader(
    $questData,
    dirname(__FILE__) . '/data',
    1000000
);

if ($startChapter) {
    $downloader->downloadFromChapter($startChapter);
} else {
    $downloader->downloadAll();
}

ElfQuestDownloader.php

<?php

class ElfQuestDownloader
{
    const FILE_TEMPLATE = '$quest-chapter$chapter-page$page.jpg';

    private $questData;
    private $baseDir;
    private $sleepMicroseconds;

    public function __construct(QuestData $questData, $baseDir, $sleepMicroseconds)
    {
        $this->questData = $questData;
        $this->baseDir = $baseDir;
        $this->sleepMicroseconds = $sleepMicroseconds;
    }

    public function downloadAll()
    {
        print "Begin\n";
        foreach ($this->questData->getChapterList() as $chapter) {
            $this->downloadChapter($chapter);
        }
        print "Done\n";
    }

    public function downloadFromChapter($startChapter)
    {
        print "Skipping to chapter $startChapter\n";
        $found = false;
        foreach ($this->questData->getChapterList() as $chapter) {
            if (! $found && $chapter == $startChapter) {
                $found = true;
                print "Begin\n";
            }
            if ($found) {
                $this->downloadChapter($chapter);
            }
        }
        print "Done\n";
    }

    public function downloadChapter($chapter)
    {
        print "Starting chapter $chapter\n";
        for ($page = 0; $page < 200; ++$page) {
            $this->downloadPage($chapter, $page);
        }
        print "Finished chapter $chapter with $page pages\n";
    }

    private function downloadPage($chapter, $page)
    {
        $url = $this->makeUrl($chapter, $page);
        print "Downloading from url $url\n";
        $contents = @file_get_contents($url);
        if (false === $contents) {
            print "Chapter $chapter does not have $page\n";
            break;
        }
        print "Finished downloading from url $url\n";
        $filename = $this->makeFilename($chapter, $page);
        $dirname = dirname($filename);
        if (! file_exists($dirname)) {
            mkdir($dirname, 0777, true);
        }
        print "Saving file $filename\n";
        $success = file_put_contents($filename, $contents);
        if (false === $success) {
            print "Error while saving file $filename\n";
            break;
        }
        print "Saved file $filename\n";
    }

    private function makeUrl($chapter, $page)
    {
        return $this->applyTemplate(
            $this->questData->getUrlTemplate(),
            $this->pad($chapter),
            $page
        );
    }

    private function makeFilename($chapter, $page)
    {
        return implode('/', [
            $this->baseDir,
            $this->questData->getQuestId(),
            $this->applyTemplate(
                self::FILE_TEMPLATE,
                $this->pad($chapter),
                $this->pad($page)
            ),
        ]);
    }

    private function applyTemplate($template, $chapter, $page)
    {
        return str_replace(
            array(
                '$quest',
                '$chapter',
                '$page',
            ),
            array(
                $this->questData->getQuestId(),
                $chapter,
                $page,
            ),
            $template
        );
    }

    private function pad($number)
    {
        if (is_int($number))
            return sprintf('%02d', $number);

        return sprintf('%04.1f', $number);
    }
}

QuestData.php

<?php

class QuestData
{
    /** @var string */
    private $questId;

    /** @var string */
    private $urlTemplate;

    /** @var float[] */
    private $chapterList;

    public function __construct($questId, $urlTemplate, array $chapterList)
    {
        $this->questId = $questId;
        $this->urlTemplate = $urlTemplate;
        $this->chapterList = $chapterList;
    }

    public function getQuestId()
    {
        return $this->questId;
    }

    public function getUrlTemplate()
    {
        return $this->urlTemplate;
    }

    public function getChapterList()
    {
        return $this->chapterList;
    }
}

QuestDataFactory.php

<?php

class QuestDataFactory
{
    private $urlTemplates = [
        'OQ'   => 'http://elfquest.com/read/OQ/OQ$chapter/oq$chapter-$page.jpg',
        'SABM' => 'http://elfquest.com/read/SABM/SABM$chapter/sabm$chapter-$page.jpg',
        'KOBW' => 'http://elfquest.com/read/KOBW/KOBW$chapter/kobw$chapter-$page.jpg',
        'HY'   => 'http://elfquest.com/read/HY/HY$chapter/hy$chapter-$page.jpg',
        'HYC'  => 'http://elfquest.com/read/HYC/hyc-$page.jpg',
        'SH'   => 'http://elfquest.com/read/SH/SH$chapter/sh$chapter-$page.jpg',
        'SHC'  => 'http://elfquest.com/read/SHC/shc-$page.jpg',
    ];

    private $chapterLists;

    public function __construct()
    {
        $this->chapterLists = [
            'OQ'   => range(1, 21),
            'SABM' => range(1, 8),
            'KOBW' => range(1, 9),
            'HY'   => array_merge([9.5], range(10, 29)),
            'HYC'  => [1],
            'SH'   => range(1, 16),
            'SHC'  => [1],
        ];
    }

    public function isKnown($questId)
    {
        return isset($this->urlTemplates[$questId]) && isset($this->chapterLists[$questId]);
    }

    public function produce($questId)
    {
        return new QuestData(
            $questId,
            $this->urlTemplates[$questId],
            $this->chapterLists[$questId]
        );
    }
}