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AbstractFeed.php
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AbstractFeed.php
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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Feed_Writer
* @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
/**
* @namespace
*/
namespace Zend\Feed\Writer;
use Zend\Uri,
Zend\Date,
Zend\Validator;
/**
* @uses \Zend\Date\Date
* @uses \Zend\Feed\Exception
* @uses \Zend\Feed\Writer\Writer
* @uses \Zend\Feed\Writer\Entry
* @uses \Zend\Feed\Writer\Renderer\Feed\Atom\Atom
* @uses \Zend\Feed\Writer\Renderer\Feed\Rss
* @uses \Zend\Uri\Url
* @uses \Zend\Validator\EmailAddress
* @category Zend
* @package Zend_Feed_Writer
* @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class AbstractFeed
{
/**
* Contains all Feed level date to append in feed output
*
* @var array
*/
protected $_data = array();
/**
* Holds the value "atom" or "rss" depending on the feed type set when
* when last exported.
*
* @var string
*/
protected $_type = null;
/**
* Constructor: Primarily triggers the registration of core extensions and
* loads those appropriate to this data container.
*
* @return void
*/
public function __construct()
{
Writer::registerCoreExtensions();
$this->_loadExtensions();
}
/**
* Set a single author
*
* @param int $index
* @return string|null
*/
public function addAuthor($name, $email = null, $uri = null)
{
$author = array();
if (is_array($name)) {
if (!array_key_exists('name', $name) || empty($name['name']) || !is_string($name['name'])) {
throw new Exception('Invalid parameter: author array must include a "name" key with a non-empty string value');
}
$author['name'] = $name['name'];
if (isset($name['email'])) {
if (empty($name['email']) || !is_string($name['email'])) {
throw new Exception('Invalid parameter: "email" array value must be a non-empty string');
}
$author['email'] = $name['email'];
}
if (isset($name['uri'])) {
if (empty($name['uri']) || !is_string($name['uri']) || !Uri\Url::validate($name['uri'])) {
throw new Exception('Invalid parameter: "uri" array value must be a non-empty string and valid URI/IRI');
}
$author['uri'] = $name['uri'];
}
} else {
if (empty($name['name']) || !is_string($name['name'])) {
throw new Exception('Invalid parameter: "name" must be a non-empty string value');
}
$author['name'] = $name;
if (isset($email)) {
if (empty($email) || !is_string($email)) {
throw new Exception('Invalid parameter: "email" value must be a non-empty string');
}
$author['email'] = $email;
}
if (isset($uri)) {
if (empty($uri) || !is_string($uri) || !Uri\Url::validate($uri)) {
throw new Exception('Invalid parameter: "uri" value must be a non-empty string and valid URI/IRI');
}
$author['uri'] = $uri;
}
}
$this->_data['authors'][] = $author;
}
/**
* Set an array with feed authors
*
* @return array
*/
public function addAuthors(array $authors)
{
foreach($authors as $author) {
$this->addAuthor($author);
}
}
/**
* Set the copyright entry
*
* @return string|null
*/
public function setCopyright($copyright)
{
if (empty($copyright) || !is_string($copyright)) {
throw new Exception('Invalid parameter: parameter must be a non-empty string');
}
$this->_data['copyright'] = $copyright;
}
/**
* Set the feed creation date
*
* @param null|integer|Date\Date
*/
public function setDateCreated($date = null)
{
$zdate = null;
if ($date === null) {
$zdate = new Date\Date;
} elseif (ctype_digit($date) && strlen($date) == 10) {
$zdate = new Date\Date($date, Date\Date::TIMESTAMP);
} elseif ($date instanceof Date\Date) {
$zdate = $date;
} else {
throw new Exception('Invalid Date\Date object or UNIX Timestamp passed as parameter');
}
$this->_data['dateCreated'] = $zdate;
}
/**
* Set the feed modification date
*
* @param null|integer|Date\Date
*/
public function setDateModified($date = null)
{
$zdate = null;
if ($date === null) {
$zdate = new Date\Date;
} elseif (ctype_digit($date) && strlen($date) == 10) {
$zdate = new Date\Date($date, Date\Date::TIMESTAMP);
} elseif ($date instanceof Date\Date) {
$zdate = $date;
} else {
throw new Exception('Invalid Date\Date object or UNIX Timestamp passed as parameter');
}
$this->_data['dateModified'] = $zdate;
}
/**
* Set the feed last-build date. Ignored for Atom 1.0.
*
* @param null|integer|Date\Date
*/
public function setLastBuildDate($date = null)
{
$zdate = null;
if ($date === null) {
$zdate = new Date\Date;
} elseif (ctype_digit($date) && strlen($date) == 10) {
$zdate = new Date\Date($date, Date\Date::TIMESTAMP);
} elseif ($date instanceof Date\Date) {
$zdate = $date;
} else {
throw new Exception('Invalid Date\Date object or UNIX Timestamp passed as parameter');
}
$this->_data['lastBuildDate'] = $zdate;
}
/**
* Set the feed description
*
* @return string|null
*/
public function setDescription($description)
{
if (empty($description) || !is_string($description)) {
throw new Exception('Invalid parameter: parameter must be a non-empty string');
}
$this->_data['description'] = $description;
}
/**
* Set the feed generator entry
*
* @return string|null
*/
public function setGenerator($name, $version = null, $uri = null)
{
if (is_array($name)) {
$data = $name;
if (empty($data['name']) || !is_string($data['name'])) {
throw new Exception('Invalid parameter: "name" must be a non-empty string');
}
$generator = array('name' => $data['name']);
if (isset($data['version'])) {
if (empty($data['version']) || !is_string($data['version'])) {
throw new Exception('Invalid parameter: "version" must be a non-empty string');
}
$generator['version'] = $data['version'];
}
if (isset($data['uri'])) {
if (empty($data['uri']) || !is_string($data['uri']) || !Uri\Url::validate($data['uri'])) {
throw new Exception('Invalid parameter: "uri" must be a non-empty string and a valid URI/IRI');
}
$generator['uri'] = $data['uri'];
}
} else {
if (empty($name) || !is_string($name)) {
throw new Exception('Invalid parameter: "name" must be a non-empty string');
}
$generator = array('name' => $name);
if (isset($version)) {
if (empty($version) || !is_string($version)) {
throw new Exception('Invalid parameter: "version" must be a non-empty string');
}
$generator['version'] = $version;
}
if (isset($uri)) {
if (empty($uri) || !is_string($uri) || !Uri\Url::validate($uri)) {
throw new Exception('Invalid parameter: "uri" must be a non-empty string and a valid URI/IRI');
}
$generator['uri'] = $uri;
}
}
$this->_data['generator'] = $generator;
}
/**
* Set the feed ID - URI or URN (via PCRE pattern) supported
*
* @param string $id
*/
public function setId($id)
{
if ((empty($id) || !is_string($id) || !Uri\Url::validate($id)) &&
!preg_match("#^urn:[a-zA-Z0-9][a-zA-Z0-9\-]{1,31}:([a-zA-Z0-9\(\)\+\,\.\:\=\@\;\$\_\!\*\-]|%[0-9a-fA-F]{2})*#", $id)
&& !$this->_validateTagUri($id)) {
throw new Exception('Invalid parameter: parameter must be a non-empty string and valid URI/IRI');
}
$this->_data['id'] = $id;
}
/**
* Validate a URI using the tag scheme (RFC 4151)
*
* @param string $id
* @return bool
*/
protected function _validateTagUri($id)
{
if (preg_match('/^tag:(?<name>.*),(?<date>\d{4}-?\d{0,2}-?\d{0,2}):(?<specific>.*)(.*:)*$/', $id, $matches)) {
$dvalid = false;
$nvalid = false;
$date = $matches['date'];
$d6 = strtotime($date);
if ((strlen($date) == 4) && $date <= date('Y')) {
$dvalid = true;
} elseif ((strlen($date) == 7) && ($d6 < strtotime("now"))) {
$dvalid = true;
} elseif ((strlen($date) == 10) && ($d6 < strtotime("now"))) {
$dvalid = true;
}
$validator = new Validator\EmailAddress;
if ($validator->isValid($matches['name'])) {
$nvalid = true;
} else {
$nvalid = $validator->isValid('info@' . $matches['name']);
}
return $dvalid && $nvalid;
}
return false;
}
/**
* Set a feed image (URI at minimum). Parameter is a single array with the
* required key 'uri'. When rendering as RSS, the required keys are 'uri',
* 'title' and 'link'. RSS also specifies three optional parameters 'width',
* 'height' and 'description'. Only 'uri' is required and used for Atom rendering.
*
* @param array $data
*/
public function setImage(array $data)
{
if (empty($data['uri']) || !is_string($data['uri'])
|| !Uri\Url::validate($data['uri'])) {
throw new Exception('Invalid parameter: parameter \'uri\''
. ' must be a non-empty string and valid URI/IRI');
}
$this->_data['image'] = $data;
}
/**
* Set the feed language
*
* @return string|null
*/
public function setLanguage($language)
{
if (empty($language) || !is_string($language)) {
throw new Exception('Invalid parameter: parameter must be a non-empty string');
}
$this->_data['language'] = $language;
}
/**
* Set a link to the HTML source
*
* @param string $link
*/
public function setLink($link)
{
if (empty($link) || !is_string($link) || !Uri\Url::validate($link)) {
throw new Exception('Invalid parameter: parameter must be a non-empty string and valid URI/IRI');
}
$this->_data['link'] = $link;
}
/**
* Set a link to an XML feed for any feed type/version
*
* @return string|null
*/
public function setFeedLink($link, $type)
{
if (empty($link) || !is_string($link) || !Uri\Url::validate($link)) {
throw new Exception('Invalid parameter: "link"" must be a non-empty string and valid URI/IRI');
}
if (!in_array(strtolower($type), array('rss', 'rdf', 'atom'))) {
throw new Exception('Invalid parameter: "type"; You must declare the type of feed the link points to, i.e. RSS, RDF or Atom');
}
$this->_data['feedLinks'][strtolower($type)] = $link;
}
/**
* Set the feed title
*
* @return string|null
*/
public function setTitle($title)
{
if (empty($title) || !is_string($title)) {
throw new Exception('Invalid parameter: parameter must be a non-empty string');
}
$this->_data['title'] = $title;
}
/**
* Set the feed character encoding
*
* @param string $encoding
*/
public function setEncoding($encoding)
{
if (empty($encoding) || !is_string($encoding)) {
throw new Exception('Invalid parameter: parameter must be a non-empty string');
}
$this->_data['encoding'] = $encoding;
}
/**
* Set the feed's base URL
*
* @param string $url
*/
public function setBaseUrl($url)
{
if (empty($url) || !is_string($url) || !Uri\Url::validate($url)) {
throw new Exception('Invalid parameter: "url" array value'
. ' must be a non-empty string and valid URI/IRI');
}
$this->_data['baseUrl'] = $url;
}
/**
* Add a Pubsubhubbub hub endpoint URL
*
* @param string $url
*/
public function addHub($url)
{
if (empty($url) || !is_string($url) || !Uri\Url::validate($url)) {
throw new Exception('Invalid parameter: "url" array value'
. ' must be a non-empty string and valid URI/IRI');
}
if (!isset($this->_data['hubs'])) {
$this->_data['hubs'] = array();
}
$this->_data['hubs'][] = $url;
}
/**
* Add Pubsubhubbub hub endpoint URLs
*
* @param array $urls
*/
public function addHubs(array $urls)
{
foreach ($urls as $url) {
$this->addHub($url);
}
}
/**
* Add a feed category
*
* @param string $category
*/
public function addCategory(array $category)
{
if (!isset($category['term'])) {
throw new Exception('Each category must be an array and '
. 'contain at least a "term" element containing the machine '
. ' readable category name');
}
if (isset($category['scheme'])) {
if (empty($category['scheme'])
|| !is_string($category['scheme'])
|| !Uri\Url::validate($category['scheme'])
) {
throw new Exception('The Atom scheme or RSS domain of'
. ' a category must be a valid URI');
}
}
if (!isset($this->_data['categories'])) {
$this->_data['categories'] = array();
}
$this->_data['categories'][] = $category;
}
/**
* Set an array of feed categories
*
* @param array $categories
*/
public function addCategories(array $categories)
{
foreach ($categories as $category) {
$this->addCategory($category);
}
}
/**
* Get a single author
*
* @param int $index
* @return string|null
*/
public function getAuthor($index = 0)
{
if (isset($this->_data['authors'][$index])) {
return $this->_data['authors'][$index];
} else {
return null;
}
}
/**
* Get an array with feed authors
*
* @return array
*/
public function getAuthors()
{
if (!array_key_exists('authors', $this->_data)) {
return null;
}
return $this->_data['authors'];
}
/**
* Get the copyright entry
*
* @return string|null
*/
public function getCopyright()
{
if (!array_key_exists('copyright', $this->_data)) {
return null;
}
return $this->_data['copyright'];
}
/**
* Get the feed creation date
*
* @return string|null
*/
public function getDateCreated()
{
if (!array_key_exists('dateCreated', $this->_data)) {
return null;
}
return $this->_data['dateCreated'];
}
/**
* Get the feed modification date
*
* @return string|null
*/
public function getDateModified()
{
if (!array_key_exists('dateModified', $this->_data)) {
return null;
}
return $this->_data['dateModified'];
}
/**
* Get the feed last-build date
*
* @return string|null
*/
public function getLastBuildDate()
{
if (!array_key_exists('lastBuildDate', $this->_data)) {
return null;
}
return $this->_data['lastBuildDate'];
}
/**
* Get the feed description
*
* @return string|null
*/
public function getDescription()
{
if (!array_key_exists('description', $this->_data)) {
return null;
}
return $this->_data['description'];
}
/**
* Get the feed generator entry
*
* @return string|null
*/
public function getGenerator()
{
if (!array_key_exists('generator', $this->_data)) {
return null;
}
return $this->_data['generator'];
}
/**
* Get the feed ID
*
* @return string|null
*/
public function getId()
{
if (!array_key_exists('id', $this->_data)) {
return null;
}
return $this->_data['id'];
}
/**
* Get the feed image URI
*
* @return array
*/
public function getImage()
{
if (!array_key_exists('image', $this->_data)) {
return null;
}
return $this->_data['image'];
}
/**
* Get the feed language
*
* @return string|null
*/
public function getLanguage()
{
if (!array_key_exists('language', $this->_data)) {
return null;
}
return $this->_data['language'];
}
/**
* Get a link to the HTML source
*
* @return string|null
*/
public function getLink()
{
if (!array_key_exists('link', $this->_data)) {
return null;
}
return $this->_data['link'];
}
/**
* Get a link to the XML feed
*
* @return string|null
*/
public function getFeedLinks()
{
if (!array_key_exists('feedLinks', $this->_data)) {
return null;
}
return $this->_data['feedLinks'];
}
/**
* Get the feed title
*
* @return string|null
*/
public function getTitle()
{
if (!array_key_exists('title', $this->_data)) {
return null;
}
return $this->_data['title'];
}
/**
* Get the feed character encoding
*
* @return string|null
*/
public function getEncoding()
{
if (!array_key_exists('encoding', $this->_data)) {
return 'UTF-8';
}
return $this->_data['encoding'];
}
/**
* Get the feed's base url
*
* @return string|null
*/
public function getBaseUrl()
{
if (!array_key_exists('baseUrl', $this->_data)) {
return null;
}
return $this->_data['baseUrl'];
}
/**
* Get the URLs used as Pubsubhubbub hubs endpoints
*
* @return string|null
*/
public function getHubs()
{
if (!array_key_exists('hubs', $this->_data)) {
return null;
}
return $this->_data['hubs'];
}
/**
* Get the feed categories
*
* @return string|null
*/
public function getCategories()
{
if (!array_key_exists('categories', $this->_data)) {
return null;
}
return $this->_data['categories'];
}
/**
* Resets the instance and deletes all data
*
* @return void
*/
public function reset()
{
$this->_data = array();
}
/**
* Set the current feed type being exported to "rss" or "atom". This allows
* other objects to gracefully choose whether to execute or not, depending
* on their appropriateness for the current type, e.g. renderers.
*
* @param string $type
*/
public function setType($type)
{
$this->_type = $type;
}
/**
* Retrieve the current or last feed type exported.
*
* @return string Value will be "rss" or "atom"
*/
public function getType()
{
return $this->_type;
}
/**
* Unset a specific data point
*
* @param string $name
*/
public function remove($name)
{
if (isset($this->_data[$name])) {
unset($this->_data[$name]);
}
}
/**
* Method overloading: call given method on first extension implementing it
*
* @param string $method
* @param array $args
* @return mixed
* @throws Exception if no extensions implements the method
*/
public function __call($method, $args)
{
foreach ($this->_extensions as $extension) {
try {
return call_user_func_array(array($extension, $method), $args);
} catch (Exception\InvalidMethodException $e) {
}
}
throw new Exception('Method: ' . $method
. ' does not exist and could not be located on a registered Extension');
}
/**
* Load extensions from Zend_Feed_Writer
*
* @return void
*/
protected function _loadExtensions()
{
$all = Writer::getExtensions();
$exts = $all['feed'];
foreach ($exts as $ext) {
if (!$className = Writer::getPluginLoader()->getClassName($ext)) {
throw new Exception(sprintf('Unable to load extension "%s"; could not resolve to class', $ext));
}
$this->_extensions[$ext] = new $className();
$this->_extensions[$ext]->setEncoding($this->getEncoding());
}
}
}