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Create a FeedBuilder class which build data for both ATOM and RSS feed.

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This commit is contained in:
ArthurHoaro 2016-03-12 16:08:01 +01:00
parent d4542fdb0d
commit 82e3680203
3 changed files with 337 additions and 239 deletions
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295
application/FeedBuilder.php Normal file
View file

@ -0,0 +1,295 @@
<?php
/**
* FeedBuilder class.
*
* Used to build ATOM and RSS feeds data.
*/
class FeedBuilder
{
/**
* @var string Constant: RSS feed type.
*/
public static $FEED_RSS = 'rss';
/**
* @var string Constant: ATOM feed type.
*/
public static $FEED_ATOM = 'atom';
/**
* @var string Default language if the locale isn't set.
*/
public static $DEFAULT_LANGUAGE = 'en-en';
/**
* @var int Number of links to display in a feed by default.
*/
public static $DEFAULT_NB_LINKS = 50;
/**
* @var LinkDB instance.
*/
protected $linkDB;
/**
* @var string RSS or ATOM feed.
*/
protected $feedType;
/**
* @var array $_SERVER.
*/
protected $serverInfo;
/**
* @var array $_GET.
*/
protected $userInput;
/**
* @var boolean True if the user is currently logged in, false otherwise.
*/
protected $isLoggedIn;
/**
* @var boolean Use permalinks instead of direct links if true.
*/
protected $usePermalinks;
/**
* @var boolean true to hide dates in feeds.
*/
protected $hideDates;
/**
* @var string PubSub hub URL.
*/
protected $pubsubhubUrl;
/**
* @var string server locale.
*/
protected $locale;
/**
* @var DateTime Latest item date.
*/
protected $latestDate;
/**
* Feed constructor.
*
* @param LinkDB $linkDB LinkDB instance.
* @param string $feedType Type of feed.
* @param array $serverInfo $_SERVER.
* @param array $userInput $_GET.
* @param boolean $isLoggedIn True if the user is currently logged in, false otherwise.
*/
public function __construct($linkDB, $feedType, $serverInfo, $userInput, $isLoggedIn)
{
$this->linkDB = $linkDB;
$this->feedType = $feedType;
$this->serverInfo = $serverInfo;
$this->userInput = $userInput;
$this->isLoggedIn = $isLoggedIn;
}
/**
* Build data for feed templates.
*
* @return array Formatted data for feeds templates.
*/
public function buildData()
{
// Optionally filter the results:
$searchtags = !empty($this->userInput['searchtags']) ? escape($this->userInput['searchtags']) : '';
$searchterm = !empty($this->userInput['searchterm']) ? escape($this->userInput['searchterm']) : '';
if (! empty($searchtags) && ! empty($searchterm)) {
$linksToDisplay = $this->linkDB->filter(
LinkFilter::$FILTER_TAG | LinkFilter::$FILTER_TEXT,
array($searchtags, $searchterm)
);
}
elseif ($searchtags) {
$linksToDisplay = $this->linkDB->filter(LinkFilter::$FILTER_TAG, $searchtags);
}
elseif ($searchterm) {
$linksToDisplay = $this->linkDB->filter(LinkFilter::$FILTER_TEXT, $searchterm);
}
else {
$linksToDisplay = $this->linkDB;
}
$nblinksToDisplay = $this->getNbLinks(count($linksToDisplay));
// Can't use array_keys() because $link is a LinkDB instance and not a real array.
$keys = array();
foreach ($linksToDisplay as $key => $value) {
$keys[] = $key;
}
$pageaddr = escape(index_url($this->serverInfo));
$linkDisplayed = array();
for ($i = 0; $i < $nblinksToDisplay && $i < count($keys); $i++) {
$linkDisplayed[$keys[$i]] = $this->buildItem($linksToDisplay[$keys[$i]], $pageaddr);
}
$data['language'] = $this->getTypeLanguage();
$data['pubsubhub_url'] = $this->pubsubhubUrl;
$data['last_update'] = $this->getLatestDateFormatted();
$data['show_dates'] = !$this->hideDates || $this->isLoggedIn;
// Remove leading slash from REQUEST_URI.
$data['self_link'] = $pageaddr . escape(ltrim($this->serverInfo['REQUEST_URI'], '/'));
$data['index_url'] = $pageaddr;
$data['usepermalinks'] = $this->usePermalinks === true;
$data['links'] = $linkDisplayed;
return $data;
}
/**
* Build a feed item (one per shaare).
*
* @param array $link Single link array extracted from LinkDB.
* @param string $pageaddr Index URL.
*
* @return array Link array with feed attributes.
*/
protected function buildItem($link, $pageaddr)
{
$link['guid'] = $pageaddr .'?'. smallHash($link['linkdate']);
// Check for both signs of a note: starting with ? and 7 chars long.
if ($link['url'][0] === '?' && strlen($link['url']) === 7) {
$link['url'] = $pageaddr . $link['url'];
}
if ($this->usePermalinks === true) {
$permalink = '<a href="'. $link['url'] .'" title="Direct link">Direct link</a>';
} else {
$permalink = '<a href="'. $link['guid'] .'" title="Permalink">Permalink</a>';
}
$link['description'] = format_description($link['description']) . PHP_EOL .'<br>&#8212; '. $permalink;
$date = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $link['linkdate']);
if ($this->feedType == self::$FEED_RSS) {
$link['iso_date'] = $date->format(DateTime::RSS);
} else {
$link['iso_date'] = $date->format(DateTime::ATOM);
}
// Save the more recent item.
if (empty($this->latestDate) || $this->latestDate < $date) {
$this->latestDate = $date;
}
$taglist = array_filter(explode(' ', $link['tags']), 'strlen');
uasort($taglist, 'strcasecmp');
$link['taglist'] = $taglist;
return $link;
}
/**
* Assign PubSub hub URL.
*
* @param string $pubsubhubUrl PubSub hub url.
*/
public function setPubsubhubUrl($pubsubhubUrl)
{
$this->pubsubhubUrl = $pubsubhubUrl;
}
/**
* Set this to true to use permalinks instead of direct links.
*
* @param boolean $usePermalinks true to force permalinks.
*/
public function setUsePermalinks($usePermalinks)
{
$this->usePermalinks = $usePermalinks;
}
/**
* Set this to true to hide timestamps in feeds.
*
* @param boolean $hideDates true to enable.
*/
public function setHideDates($hideDates)
{
$this->hideDates = $hideDates;
}
/**
* Set the locale. Used to show feed language.
*
* @param string $locale The locale (eg. 'fr_FR.UTF8').
*/
public function setLocale($locale)
{
$this->locale = strtolower($locale);
}
/**
* Get the language according to the feed type, based on the locale:
*
* - RSS format: en-us (default: 'en-en').
* - ATOM format: fr (default: 'en').
*
* @return string The language.
*/
public function getTypeLanguage()
{
// Use the locale do define the language, if available.
if (! empty($this->locale) && preg_match('/^\w{2}[_\-]\w{2}/', $this->locale)) {
$length = ($this->feedType == self::$FEED_RSS) ? 5 : 2;
return str_replace('_', '-', substr($this->locale, 0, $length));
}
return ($this->feedType == self::$FEED_RSS) ? 'en-en' : 'en';
}
/**
* Format the latest item date found according to the feed type.
*
* Return an empty string if invalid DateTime is passed.
*
* @return string Formatted date.
*/
protected function getLatestDateFormatted()
{
if (empty($this->latestDate) || !$this->latestDate instanceof DateTime) {
return '';
}
$type = ($this->feedType == self::$FEED_RSS) ? DateTime::RSS : DateTime::ATOM;
return $this->latestDate->format($type);
}
/**
* Returns the number of link to display according to 'nb' user input parameter.
*
* If 'nb' not set or invalid, default value: $DEFAULT_NB_LINKS.
* If 'nb' is set to 'all', display all filtered links (max parameter).
*
* @param int $max maximum number of links to display.
*
* @return int number of links to display.
*/
public function getNbLinks($max)
{
if (empty($this->userInput['nb'])) {
return self::$DEFAULT_NB_LINKS;
}
if ($this->userInput['nb'] == 'all') {
return $max;
}
$intNb = intval($this->userInput['nb']);
if (! is_int($intNb) || $intNb == 0) {
return self::$DEFAULT_NB_LINKS;
}
return $intNb;
}
}

2
application/Router.php
View file

@ -53,7 +53,7 @@ class Router
* @param array $get $_SERVER['GET'].
* @param bool $loggedIn true if authenticated user.
*
* @return self::page found.
* @return string page found.
*/
public static function findPage($query, $get, $loggedIn)
{

277
index.php
View file

@ -154,6 +154,7 @@
require_once 'application/ApplicationUtils.php';
require_once 'application/Cache.php';
require_once 'application/CachedPage.php';
require_once 'application/FeedBuilder.php';
require_once 'application/FileUtils.php';
require_once 'application/HttpUtils.php';
require_once 'application/LinkDB.php';
@ -681,237 +682,6 @@ public function render404($message='The page you are trying to reach does not ex
}
}
// ------------------------------------------------------------------------------------------
// Output the last N links in RSS 2.0 format.
function showRSS($pageBuilder, $linkDB)
{
header('Content-Type: application/rss+xml; charset=utf-8');
// $usepermalink : If true, use permalink instead of final link.
// User just has to add 'permalink' in URL parameters. e.g. http://mysite.com/shaarli/?do=rss&permalinks
// Also enabled through a config option
$usepermalinks = isset($_GET['permalinks']) || !$GLOBALS['config']['ENABLE_RSS_PERMALINKS'];
// Cache system
$query = $_SERVER['QUERY_STRING'];
$cache = new CachedPage(
$GLOBALS['config']['PAGECACHE'],
page_url($_SERVER),
startsWith($query, 'do=rss') && !isLoggedIn()
);
$cached = $cache->cachedVersion();
if (! empty($cached)) {
echo $cached;
exit;
}
// Optionally filter the results:
$searchtags = !empty($_GET['searchtags']) ? escape($_GET['searchtags']) : '';
$searchterm = !empty($_GET['searchterm']) ? escape($_GET['searchterm']) : '';
if (! empty($searchtags) && ! empty($searchterm)) {
$linksToDisplay = $linkDB->filter(
LinkFilter::$FILTER_TAG | LinkFilter::$FILTER_TEXT,
array($searchtags, $searchterm)
);
}
elseif ($searchtags) {
$linksToDisplay = $linkDB->filter(LinkFilter::$FILTER_TAG, $searchtags);
}
elseif ($searchterm) {
$linksToDisplay = $linkDB->filter(LinkFilter::$FILTER_TEXT, $searchterm);
}
else {
$linksToDisplay = $linkDB;
}
$nblinksToDisplay = 50; // Number of links to display.
// In URL, you can specificy the number of links. Example: nb=200 or nb=all for all links.
if (!empty($_GET['nb'])) {
$nblinksToDisplay = $_GET['nb'] == 'all' ? count($linksToDisplay) : max(intval($_GET['nb']), 1);
}
$keys = array();
foreach ($linksToDisplay as $key=>$value) {
$keys[] = $key; // No, I can't use array_keys().
}
$pageaddr = escape(index_url($_SERVER));
$latestDate = '';
$i = 0;
$linkDisp = array();
while ($i < $nblinksToDisplay && $i < count($keys))
{
$link = $linksToDisplay[$keys[$i]];
$link['guid'] = $pageaddr. '?' .smallHash($link['linkdate']);
// Check for both signs of a note: starting with ? and 7 chars long.
if ($link['url'][0] === '?' && strlen($link['url']) === 7) {
$link['url'] = $pageaddr . $link['url'];
}
if ($usepermalinks) {
$permalink = '<a href="'. $link['url'] .'" title="Direct link">Direct link</a>';
} else {
$permalink = '<a href="'. $link['guid'] .'" title="Permalink">Permalink</a>';
}
$link['description'] = format_description($link['description']) . PHP_EOL .'<br>&#8212; '. $permalink;
$date = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $link['linkdate']);
$link['iso_date'] = $date->format(DateTime::RSS);
$latestDate = max($latestDate, $link['iso_date']);
$taglist = array_filter(explode(' ', $link['tags']), 'strlen');
uasort($taglist, 'strcasecmp');
$link['taglist'] = $taglist;
$linkDisp[$keys[$i]] = $link;
$i++;
}
$data = array();
if (!empty($GLOBALS['config']['PUBSUBHUB_URL'])) {
$data['pubsubhub_url'] = escape($GLOBALS['config']['PUBSUBHUB_URL']);
}
// Use the locale do define the language, if available.
$locale = strtolower(setlocale(LC_COLLATE, 0));
if (! empty($locale) && preg_match('/^\w{2}[_\-]\w{2}/', $locale)) {
$data['language'] = str_replace('_', '-', substr($locale, 0, 5));
} else {
$data['language'] = 'en-en';
}
$data['last_update'] = escape($latestDate);
$data['show_dates'] = !$GLOBALS['config']['HIDE_TIMESTAMPS'] || isLoggedIn();
// Remove starting slash from REQUEST_URI.
$data['self_link'] = escape($pageaddr . substr($_SERVER['REQUEST_URI'], 1));
$data['index_url'] = escape($pageaddr);
$data['usepermalinks'] = $usepermalinks;
$data['links'] = $linkDisp;
$pluginManager = PluginManager::getInstance();
$pluginManager->executeHooks('render_feed', $data, array(
'loggedin' => isLoggedIn(),
'target' => Router::$PAGE_RSS,
));
$pageBuilder->assignAll($data);
$pageBuilder->renderPage('feed.rss', false);
$cache->cache(ob_get_contents());
ob_end_flush();
exit;
}
// ------------------------------------------------------------------------------------------
// Output the last N links in ATOM format.
function showATOM($pageBuilder, $linkDB)
{
header('Content-Type: application/atom+xml; charset=utf-8');
// Cache system
$query = $_SERVER["QUERY_STRING"];
$cache = new CachedPage(
$GLOBALS['config']['PAGECACHE'],
page_url($_SERVER),
startsWith($query,'do=atom') && !isLoggedIn()
);
$cached = $cache->cachedVersion();
if (!empty($cached)) {
echo $cached;
exit;
}
// $usepermalink : If true, use permalink instead of final link.
// User just has to add 'permalink' in URL parameters. e.g. http://mysite.com/shaarli/?do=atom&permalinks
$usepermalinks = isset($_GET['permalinks']) || !$GLOBALS['config']['ENABLE_RSS_PERMALINKS'];
// Optionally filter the results:
$searchtags = !empty($_GET['searchtags']) ? escape($_GET['searchtags']) : '';
$searchterm = !empty($_GET['searchterm']) ? escape($_GET['searchterm']) : '';
if (! empty($searchtags) && ! empty($searchterm)) {
$linksToDisplay = $linkDB->filter(
LinkFilter::$FILTER_TAG | LinkFilter::$FILTER_TEXT,
array($searchtags, $searchterm)
);
}
elseif ($searchtags) {
$linksToDisplay = $linkDB->filter(LinkFilter::$FILTER_TAG, $searchtags);
}
elseif ($searchterm) {
$linksToDisplay = $linkDB->filter(LinkFilter::$FILTER_TEXT, $searchterm);
}
else {
$linksToDisplay = $linkDB;
}
$nblinksToDisplay = 50; // Number of links to display.
// In URL, you can specificy the number of links. Example: nb=200 or nb=all for all links.
if (!empty($_GET['nb'])) {
$nblinksToDisplay = $_GET['nb'] == 'all' ? count($linksToDisplay) : max(intval($_GET['nb']), 1);
}
$keys = array();
foreach ($linksToDisplay as $key=>$value) {
$keys[] = $key; // No, I can't use array_keys().
}
$pageaddr = escape(index_url($_SERVER));
$latestDate = '';
$i = 0;
$linkDisp = array();
while ($i < $nblinksToDisplay && $i < count($keys))
{
$link = $linksToDisplay[$keys[$i]];
$link['guid'] = $pageaddr. '?' .smallHash($link['linkdate']);
// Check for both signs of a note: starting with ? and 7 chars long.
if ($link['url'][0] === '?' && strlen($link['url']) === 7) {
$link['url'] = $pageaddr . $link['url'];
}
if ($usepermalinks) {
$permalink = '<a href="'. $link['url'] .'" title="Direct link">Direct link</a>';
} else {
$permalink = '<a href="'. $link['guid'] .'" title="Permalink">Permalink</a>';
}
$link['description'] = format_description($link['description']) . PHP_EOL .'<br>&#8212; '. $permalink;
$date = DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, $link['linkdate']);
$link['iso_date'] = $date->format(DateTime::ATOM);
$latestDate = max($latestDate, $link['iso_date']);
$taglist = array_filter(explode(' ', $link['tags']), 'strlen');
uasort($taglist, 'strcasecmp');
$link['taglist'] = $taglist;
$linkDisp[$keys[$i]] = $link;
$i++;
}
$data = array();
if (!empty($GLOBALS['config']['PUBSUBHUB_URL'])) {
$data['pubsubhub_url'] = escape($GLOBALS['config']['PUBSUBHUB_URL']);
}
// Use the locale do define the language, if available.
$locale = strtolower(setlocale(LC_COLLATE, 0));
if (! empty($locale) && preg_match('/^\w{2}[_\-]\w{2}/', $locale)) {
$data['language'] = substr($locale, 0, 2);
} else {
$data['language'] = 'en';
}
$data['last_update'] = escape($latestDate);
$data['show_dates'] = !$GLOBALS['config']['HIDE_TIMESTAMPS'] || isLoggedIn();
$data['self_link'] = escape($pageaddr . $_SERVER['REQUEST_URI']);
$data['index_url'] = escape($pageaddr);
$data['usepermalinks'] = $usepermalinks;
$data['links'] = $linkDisp;
$pluginManager = PluginManager::getInstance();
$pluginManager->executeHooks('render_feed', $data, array(
'loggedin' => isLoggedIn(),
'target' => Router::$PAGE_ATOM,
));
$pageBuilder->assignAll($data);
$pageBuilder->renderPage('feed.atom', false);
$cache->cache(ob_get_contents());
ob_end_flush();
exit;
}
// ------------------------------------------------------------------------------------------
// Daily RSS feed: 1 RSS entry per day giving all the links on that day.
// Gives the last 7 days (which have links).
@ -1288,14 +1058,47 @@ function renderPage()
showDaily($PAGE);
}
// ATOM feed.
if ($targetPage == Router::$PAGE_ATOM) {
showATOM($PAGE, $LINKSDB);
// ATOM and RSS feed.
if ($targetPage == Router::$PAGE_FEED_ATOM || $targetPage == Router::$PAGE_FEED_RSS) {
$feedType = $targetPage == Router::$PAGE_FEED_RSS ? FeedBuilder::$FEED_RSS : FeedBuilder::$FEED_ATOM;
header('Content-Type: application/'. $feedType .'+xml; charset=utf-8');
// Cache system
$query = $_SERVER['QUERY_STRING'];
$cache = new CachedPage(
$GLOBALS['config']['PAGECACHE'],
page_url($_SERVER),
startsWith($query,'do='. $targetPage) && !isLoggedIn()
);
$cached = $cache->cachedVersion();
if (!empty($cached)) {
echo $cached;
exit;
}
// RSS feed.
if ($targetPage == Router::$PAGE_RSS) {
showRSS($PAGE, $LINKSDB);
// Generate data.
$feedGenerator = new FeedBuilder($LINKSDB, $feedType, $_SERVER, $_GET, isLoggedIn());
$feedGenerator->setLocale(strtolower(setlocale(LC_COLLATE, 0)));
$feedGenerator->setHideDates($GLOBALS['config']['HIDE_TIMESTAMPS'] && !isLoggedIn());
$feedGenerator->setUsePermalinks(isset($_GET['permalinks']) || !$GLOBALS['config']['ENABLE_RSS_PERMALINKS']);
if (!empty($GLOBALS['config']['PUBSUBHUB_URL'])) {
$feedGenerator->setPubsubhubUrl($GLOBALS['config']['PUBSUBHUB_URL']);
}
$data = $feedGenerator->buildData();
// Process plugin hook.
$pluginManager = PluginManager::getInstance();
$pluginManager->executeHooks('render_feed', $data, array(
'loggedin' => isLoggedIn(),
'target' => $targetPage,
));
// Render the template.
$PAGE->assignAll($data);
$PAGE->renderPage('feed.'. $feedType);
$cache->cache(ob_get_contents());
ob_end_flush();
exit;
}
// Display openseach plugin (XML)