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<?php
namespace Icamys\SitemapGenerator;
use BadMethodCallException;
use DateTime;
use Icamys\SitemapGenerator\Extensions\GoogleVideoExtension;
use InvalidArgumentException;
use OutOfRangeException;
use RuntimeException;
use XMLWriter;
/**
* Class SitemapGenerator
* @package Icamys\SitemapGenerator
*/
class SitemapGenerator
{
/**
* Max size of a sitemap according to spec.
* @see https://www.sitemaps.org/protocol.html
*/
private const MAX_FILE_SIZE = 52428800;
/**
* Max number of urls per sitemap according to spec.
* @see https://www.sitemaps.org/protocol.html
*/
private const MAX_URLS_PER_SITEMAP = 50000;
/**
* Max number of sitemaps per index file according to spec.
* @see http://www.sitemaps.org/protocol.html
*/
private const MAX_SITEMAPS_PER_INDEX = 50000;
/**
* Total max number of URLs.
*/
private const TOTAL_MAX_URLS = self::MAX_URLS_PER_SITEMAP * self::MAX_SITEMAPS_PER_INDEX;
/**
* Max url length according to spec.
* @see https://www.sitemaps.org/protocol.html#xmlTagDefinitions
*/
private const MAX_URL_LEN = 2048;
/**
* Robots file name
* @var string
* @access public
*/
private $robotsFileName = "robots.txt";
/**
* Name of sitemap file
* @var string
* @access public
*/
private $sitemapFileName = "sitemap.xml";
/**
* Name of sitemap index file
* @var string
* @access public
*/
private $sitemapIndexFileName = "sitemap-index.xml";
/**
* Quantity of URLs per single sitemap file.
* If Your links are very long, sitemap file can be bigger than 10MB,
* in this case use smaller value.
* @var int
* @access public
*/
private $maxUrlsPerSitemap = self::MAX_URLS_PER_SITEMAP;
/**
* If true, two sitemap files (.xml and .xml.gz) will be created and added to robots.txt.
* If true, .gz file will be submitted to search engines.
* If quantity of URLs will be bigger than 50.000, option will be ignored,
* all sitemap files except sitemap index will be compressed.
* @var bool
* @access public
*/
private $isCompressionEnabled = false;
/**
* URL to Your site.
* Script will use it to send sitemaps to search engines.
* @var string
* @access private
*/
private $baseURL;
/**
* Base path. Relative to script location.
* Use this if Your sitemap and robots files should be stored in other
* directory then script.
* @var string
* @access private
*/
private $basePath;
/**
* Version of this class
* @var string
* @access private
*/
private $classVersion = "4.3.2";
/**
* Search engines URLs
* @var array of strings
* @access private
*/
private $searchEngines = [
[
"http://search.yahooapis.com/SiteExplorerService/V1/updateNotification?appid=USERID&url=",
"http://search.yahooapis.com/SiteExplorerService/V1/ping?sitemap=",
],
"http://www.google.com/ping?sitemap=",
"http://submissions.ask.com/ping?sitemap=",
"http://www.bing.com/ping?sitemap=",
"http://www.webmaster.yandex.ru/ping?sitemap=",
];
/**
* Array with urls
* @var array
* @access private
*/
private $urls;
/**
* Lines for robots.txt file that are written if file does not exist
* @var array
*/
private $sampleRobotsLines = [
"User-agent: *",
"Allow: /",
];
/**
* @var array list of valid changefreq values according to the spec
*/
private $validChangefreqValues = [
'always',
'hourly',
'daily',
'weekly',
'monthly',
'yearly',
'never',
];
/**
* @var float[] list of valid priority values according to the spec
*/
private $validPriorities = [
0.0,
0.1,
0.2,
0.3,
0.4,
0.5,
0.6,
0.7,
0.8,
0.9,
1.0,
];
/**
* @var FileSystem object used to communicate with file system
*/
private $fs;
/**
* @var Runtime object used to communicate with runtime
*/
private $runtime;
/**
* @var XMLWriter Used for writing xml to files
*/
private $xmlWriter;
/**
* @var string
*/
private $flushedSitemapFilenameFormat;
/**
* @var int
*/
private $flushedSitemapSize = 0;
/**
* @var int
*/
private $flushedSitemapCounter = 0;
/**
* @var array
*/
private $flushedSitemaps = [];
/**
* @var bool
*/
private $isSitemapStarted = false;
/**
* @var int
*/
private $totalUrlCount = 0;
/**
* @var int
*/
private $urlsetClosingTagLen = 10; // strlen("</urlset>\n")
private $sitemapUrlCount = 0;
private $generatedFiles = [];
/**
* @param string $baseURL You site URL
* @param string $basePath Relative path where sitemap and robots should be stored.
* @param FileSystem|null $fs
* @param Runtime|null $runtime
*/
public function __construct(string $baseURL, string $basePath = "", FileSystem $fs = null, Runtime $runtime = null)
{
$this->urls = [];
$this->baseURL = rtrim($baseURL, '/');
if ($fs === null) {
$this->fs = new FileSystem();
} else {
$this->fs = $fs;
}
if ($runtime === null) {
$this->runtime = new Runtime();
} else {
$this->runtime = $runtime;
}
if ($this->runtime->is_writable($basePath) === false) {
throw new InvalidArgumentException(
sprintf('the provided basePath (%s) should be a writable directory,', $basePath) .
' please check its existence and permissions'
);
}
if (strlen($basePath) > 0 && substr($basePath, -1) != DIRECTORY_SEPARATOR) {
$basePath = $basePath . DIRECTORY_SEPARATOR;
}
$this->basePath = $basePath;
$this->xmlWriter = $this->createXmlWriter();
$this->flushedSitemapFilenameFormat = sprintf("sm-%%d-%d.xml", time());
}
private function createXmlWriter(): XMLWriter
{
$w = new XMLWriter();
$w->openMemory();
$w->setIndent(true);
return $w;
}
/**
* @param string $filename
* @return SitemapGenerator
*/
public function setSitemapFilename(string $filename = ''): SitemapGenerator
{
if (strlen($filename) === 0) {
throw new InvalidArgumentException('sitemap filename should not be empty');
}
if (pathinfo($filename, PATHINFO_EXTENSION) !== 'xml') {
throw new InvalidArgumentException('sitemap filename should have *.xml extension');
}
$this->sitemapFileName = $filename;
return $this;
}
/**
* @param string $filename
* @return $this
*/
public function setSitemapIndexFilename(string $filename = ''): SitemapGenerator
{
if (strlen($filename) === 0) {
throw new InvalidArgumentException('filename should not be empty');
}
$this->sitemapIndexFileName = $filename;
return $this;
}
/**
* @param string $filename
* @return $this
*/
public function setRobotsFileName(string $filename): SitemapGenerator
{
if (strlen($filename) === 0) {
throw new InvalidArgumentException('filename should not be empty');
}
$this->robotsFileName = $filename;
return $this;
}
/**
* @param int $value
* @return $this
*/
public function setMaxUrlsPerSitemap(int $value): SitemapGenerator
{
if ($value < 1 || self::MAX_URLS_PER_SITEMAP < $value) {
throw new OutOfRangeException(
sprintf('value %d is out of range 1-%d', $value, self::MAX_URLS_PER_SITEMAP)
);
}
$this->maxUrlsPerSitemap = $value;
return $this;
}
public function enableCompression(): SitemapGenerator
{
$this->isCompressionEnabled = true;
return $this;
}
public function disableCompression(): SitemapGenerator
{
$this->isCompressionEnabled = false;
return $this;
}
public function isCompressionEnabled(): bool
{
return $this->isCompressionEnabled;
}
public function validate(
string $path,
DateTime $lastModified = null,
string $changeFrequency = null,
float $priority = null,
array $alternates = null,
array $extensions = [])
{
if (!(1 <= mb_strlen($path) && mb_strlen($path) <= self::MAX_URL_LEN)) {
throw new InvalidArgumentException(
sprintf("The urlPath argument length must be between 1 and %d.", self::MAX_URL_LEN)
);
}
if ($changeFrequency !== null && !in_array($changeFrequency, $this->validChangefreqValues)) {
throw new InvalidArgumentException(
'The change frequency argument should be one of: %s' . implode(',', $this->validChangefreqValues)
);
}
if ($priority !== null && !in_array($priority, $this->validPriorities)) {
throw new InvalidArgumentException("Priority argument should be a float number in the range [0.0..1.0]");
}
if ($extensions !== null && isset($extensions['google_video'])) {
GoogleVideoExtension::validate($this->baseURL . $path, $extensions['google_video']);
}
}
/**
* Add url components.
* Instead of storing all urls in the memory, the generator will flush sets of added urls
* to the temporary files created on your disk.
* The file format is 'sm-{index}-{timestamp}.xml'
* @param string $path
* @param DateTime|null $lastModified
* @param string|null $changeFrequency
* @param float|null $priority
* @param array|null $alternates
* @param array $extensions
* @return $this
*/
public function addURL(
string $path,
DateTime $lastModified = null,
string $changeFrequency = null,
float $priority = null,
array $alternates = null,
array $extensions = []
): SitemapGenerator
{
$this->validate($path, $lastModified, $changeFrequency, $priority, $alternates, $extensions);
if ($this->totalUrlCount >= self::TOTAL_MAX_URLS) {
throw new OutOfRangeException(
sprintf("Max url limit reached (%d)", self::TOTAL_MAX_URLS)
);
}
if ($this->isSitemapStarted === false) {
$this->writeSitemapStart();
}
$this->writeSitemapUrl($this->baseURL . $path, $lastModified, $changeFrequency, $priority, $alternates, $extensions);
if ($this->totalUrlCount % 1000 === 0 || $this->sitemapUrlCount >= $this->maxUrlsPerSitemap) {
$this->flushWriter();
}
if ($this->sitemapUrlCount === $this->maxUrlsPerSitemap) {
$this->writeSitemapEnd();
}
return $this;
}
private function writeSitemapStart()
{
$this->xmlWriter->startDocument("1.0", "UTF-8");
$this->xmlWriter->writeComment(sprintf('generator-class="%s"', get_class($this)));
$this->xmlWriter->writeComment(sprintf('generator-version="%s"', $this->classVersion));
$this->xmlWriter->writeComment(sprintf('generated-on="%s"', date('c')));
$this->xmlWriter->startElement('urlset');
$this->xmlWriter->writeAttribute('xmlns', 'http://www.sitemaps.org/schemas/sitemap/0.9');
$this->xmlWriter->writeAttribute('xmlns:xhtml', 'http://www.w3.org/1999/xhtml');
$this->xmlWriter->writeAttribute('xmlns:video', 'http://www.google.com/schemas/sitemap-video/1.1');
$this->xmlWriter->writeAttribute('xmlns:xsi', 'http://www.w3.org/2001/XMLSchema-instance');
$this->xmlWriter->writeAttribute('xsi:schemaLocation', 'http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd');
$this->isSitemapStarted = true;
}
private function writeSitemapUrl($loc, $lastModified, $changeFrequency, $priority, $alternates, $extensions)
{
$this->xmlWriter->startElement('url');
$this->xmlWriter->writeElement('loc', htmlspecialchars($loc, ENT_QUOTES));
if ($lastModified !== null) {
$this->xmlWriter->writeElement('lastmod', $lastModified->format(DateTime::ATOM));
}
if ($changeFrequency !== null) {
$this->xmlWriter->writeElement('changefreq', $changeFrequency);
}
if ($priority !== null) {
$this->xmlWriter->writeElement('priority', number_format($priority, 1, ".", ""));
}
if (is_array($alternates) && count($alternates) > 0) {
foreach ($alternates as $alternate) {
if (is_array($alternate) && isset($alternate['hreflang']) && isset($alternate['href'])) {
$this->xmlWriter->startElement('xhtml:link');
$this->xmlWriter->writeAttribute('rel', 'alternate');
$this->xmlWriter->writeAttribute('hreflang', $alternate['hreflang']);
$this->xmlWriter->writeAttribute('href', $alternate['href']);
$this->xmlWriter->endElement();
}
}
}
foreach ($extensions as $extName => $extFields) {
if ($extName === 'google_video') {
GoogleVideoExtension::writeVideoTag($this->xmlWriter, $loc, $extFields);
}
}
$this->xmlWriter->endElement(); // url
$this->sitemapUrlCount++;
$this->totalUrlCount++;
}
private function flushWriter()
{
$targetSitemapFilepath = $this->basePath . sprintf($this->flushedSitemapFilenameFormat, $this->flushedSitemapCounter);
$flushedString = $this->xmlWriter->outputMemory(true);
$flushedStringLen = mb_strlen($flushedString);
if ($flushedStringLen === 0) {
return;
}
$this->flushedSitemapSize += $flushedStringLen;
if ($this->flushedSitemapSize > self::MAX_FILE_SIZE - $this->urlsetClosingTagLen) {
$this->writeSitemapEnd();
$this->writeSitemapStart();
}
$this->fs->file_put_contents($targetSitemapFilepath, $flushedString, FILE_APPEND);
}
private function writeSitemapEnd()
{
$targetSitemapFilepath = $this->basePath . sprintf($this->flushedSitemapFilenameFormat, $this->flushedSitemapCounter);
$this->xmlWriter->endElement(); // urlset
$this->xmlWriter->endDocument();
$this->fs->file_put_contents($targetSitemapFilepath, $this->xmlWriter->flush(true), FILE_APPEND);
$this->isSitemapStarted = false;
$this->flushedSitemaps[] = $targetSitemapFilepath;
$this->flushedSitemapCounter++;
$this->sitemapUrlCount = 0;
}
/**
* Flush all stored urls from memory to the disk and close all necessary tags.
*/
public function flush()
{
$this->flushWriter();
if ($this->isSitemapStarted) {
$this->writeSitemapEnd();
}
}
/**
* Move flushed files to their final location. Compress if necessary.
*/
public function finalize()
{
$this->generatedFiles = [];
if (count($this->flushedSitemaps) === 1) {
$targetSitemapFilename = $this->sitemapFileName;
if ($this->isCompressionEnabled) {
$targetSitemapFilename .= '.gz';
}
$targetSitemapFilepath = $this->basePath . $targetSitemapFilename;
if ($this->isCompressionEnabled) {
$this->fs->copy($this->flushedSitemaps[0], 'compress.zlib://' . $targetSitemapFilepath);
$this->fs->unlink($this->flushedSitemaps[0]);
} else {
$this->fs->rename($this->flushedSitemaps[0], $targetSitemapFilepath);
}
$this->generatedFiles['sitemaps_location'] = [$targetSitemapFilepath];
$this->generatedFiles['sitemaps_index_url'] = $this->baseURL . '/' . $targetSitemapFilename;
} else if (count($this->flushedSitemaps) > 1) {
$ext = '.' . pathinfo($this->sitemapFileName, PATHINFO_EXTENSION);
$targetExt = $ext;
if ($this->isCompressionEnabled) {
$targetExt .= '.gz';
}
$sitemapsUrls = [];
$targetSitemapFilepaths = [];
foreach ($this->flushedSitemaps as $i => $flushedSitemap) {
$targetSitemapFilename = str_replace($ext, ($i + 1) . $targetExt, $this->sitemapFileName);
$targetSitemapFilepath = $this->basePath . $targetSitemapFilename;
if ($this->isCompressionEnabled) {
$this->fs->copy($flushedSitemap, 'compress.zlib://' . $targetSitemapFilepath);
$this->fs->unlink($flushedSitemap);
} else {
$this->fs->rename($flushedSitemap, $targetSitemapFilepath);
}
$sitemapsUrls[] = htmlspecialchars($this->baseURL . '/' . $targetSitemapFilename, ENT_QUOTES);
$targetSitemapFilepaths[] = $targetSitemapFilepath;
}
$targetSitemapIndexFilepath = $this->basePath . $this->sitemapIndexFileName;
$this->createSitemapIndex($sitemapsUrls, $targetSitemapIndexFilepath);
$this->generatedFiles['sitemaps_location'] = $targetSitemapFilepaths;
$this->generatedFiles['sitemaps_index_location'] = $targetSitemapIndexFilepath;
$this->generatedFiles['sitemaps_index_url'] = $this->baseURL . '/' . $this->sitemapIndexFileName;
} else {
throw new RuntimeException('failed to finalize, please add urls and flush first');
}
}
private function createSitemapIndex($sitemapsUrls, $sitemapIndexFileName)
{
$this->xmlWriter->flush(true);
$this->writeSitemapIndexStart();
foreach ($sitemapsUrls as $sitemapsUrl) {
$this->writeSitemapIndexUrl($sitemapsUrl);
}
$this->writeSitemapIndexEnd();
$this->fs->file_put_contents(
$sitemapIndexFileName,
$this->xmlWriter->flush(true),
FILE_APPEND
);
}
private function writeSitemapIndexStart()
{
$this->xmlWriter->startDocument("1.0", "UTF-8");
$this->xmlWriter->writeComment(sprintf('generator-class="%s"', get_class($this)));
$this->xmlWriter->writeComment(sprintf('generator-version="%s"', $this->classVersion));
$this->xmlWriter->writeComment(sprintf('generated-on="%s"', date('c')));
$this->xmlWriter->startElement('sitemapindex');
$this->xmlWriter->writeAttribute('xmlns', 'http://www.sitemaps.org/schemas/sitemap/0.9');
$this->xmlWriter->writeAttribute('xmlns:xsi', 'http://www.w3.org/2001/XMLSchema-instance');
$this->xmlWriter->writeAttribute('xsi:schemaLocation', 'http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd');
}
private function writeSitemapIndexUrl($url)
{
$this->xmlWriter->startElement('sitemap');
$this->xmlWriter->writeElement('loc', htmlspecialchars($url, ENT_QUOTES));
$this->xmlWriter->writeElement('lastmod', date('c'));
$this->xmlWriter->endElement(); // sitemap
}
private function writeSitemapIndexEnd()
{
$this->xmlWriter->endElement(); // sitemapindex
$this->xmlWriter->endDocument();
}
/**
* @return array Array of previously generated files
*/
public function getGeneratedFiles(): array
{
return $this->generatedFiles;
}
/**
* Will inform search engines about newly created sitemaps.
* Google, Ask, Bing and Yahoo will be noticed.
* If You don't pass yahooAppId, Yahoo still will be informed,
* but this method can be used once per day. If You will do this often,
* message that limit was exceeded will be returned from Yahoo.
* @param string $yahooAppId Your site Yahoo appid.
* @return array of messages and http codes from each search engine
* @access public
* @throws BadMethodCallException
*/
public function submitSitemap($yahooAppId = null): array
{
if (count($this->generatedFiles) === 0) {
throw new BadMethodCallException("To update robots.txt, call finalize() first.");
}
if (!$this->runtime->extension_loaded('curl')) {
throw new BadMethodCallException("cURL extension is needed to do submission.");
}
$searchEngines = $this->searchEngines;
$searchEngines[0] = isset($yahooAppId) ?
str_replace("USERID", $yahooAppId, $searchEngines[0][0]) :
$searchEngines[0][1];
$result = [];
for ($i = 0; $i < count($searchEngines); $i++) {
$submitUrl = $searchEngines[$i] . htmlspecialchars($this->generatedFiles['sitemaps_index_url'], ENT_QUOTES);
$submitSite = $this->runtime->curl_init($submitUrl);
$this->runtime->curl_setopt($submitSite, CURLOPT_RETURNTRANSFER, true);
$responseContent = $this->runtime->curl_exec($submitSite);
$response = $this->runtime->curl_getinfo($submitSite);
$submitSiteShort = array_reverse(explode(".", parse_url($searchEngines[$i], PHP_URL_HOST)));
$result[] = [
"site" => $submitSiteShort[1] . "." . $submitSiteShort[0],
"fullsite" => $submitUrl,
"http_code" => $response['http_code'],
"message" => str_replace("\n", " ", strip_tags($responseContent)),
];
}
return $result;
}
/**
* Adds sitemap url to robots.txt file located in basePath.
* If robots.txt file exists,
* the function will append sitemap url to file.
* If robots.txt does not exist,
* the function will create new robots.txt file with sample content and sitemap url.
* @access public
* @throws BadMethodCallException
* @throws RuntimeException
*/
public function updateRobots(): SitemapGenerator
{
if (count($this->generatedFiles) === 0) {
throw new BadMethodCallException("To update robots.txt, call finalize() first.");
}
$robotsFilePath = $this->basePath . $this->robotsFileName;
$robotsFileContent = $this->createNewRobotsContentFromFile($robotsFilePath);
$this->fs->file_put_contents($robotsFilePath, $robotsFileContent);
return $this;
}
/**
* @param $filepath
* @return string
*/
private function createNewRobotsContentFromFile($filepath): string
{
if ($this->fs->file_exists($filepath)) {
$robotsFileContent = "";
$robotsFile = explode(PHP_EOL, $this->fs->file_get_contents($filepath));
foreach ($robotsFile as $key => $value) {
if (substr($value, 0, 8) == 'Sitemap:') {
unset($robotsFile[$key]);
} else {
$robotsFileContent .= $value . PHP_EOL;
}
}
} else {
$robotsFileContent = $this->getSampleRobotsContent();
}
$robotsFileContent .= "Sitemap: {$this->generatedFiles['sitemaps_index_url']}";
return $robotsFileContent;
}
/**
* @return string
* @access private
*/
private function getSampleRobotsContent(): string
{
return implode(PHP_EOL, $this->sampleRobotsLines) . PHP_EOL;
}
}