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[lib] Split Bridge/Cache/Format into one file per class

Browse source 
The files have grown to a size where it is necessary to search
for a class in a file. This commit splits the content into one
file per class. RSS-Bridge will require implementations and
the implementations will require (once) the interfaces.
This commit is contained in:
logmanoriginal 2016-09-05 18:05:19 +02:00
parent d98bb25de6
commit 298dc49c67
12 changed files with 796 additions and 793 deletions
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656
lib/Bridge.php
View file

@ -1,4 +1,5 @@
<?php
require_once(__DIR__ . '/BridgeInterface.php');
class Bridge {
static protected $dirBridge;
@ -101,658 +102,3 @@ EOD;
}
}
}
interface BridgeInterface {
public function collectData();
public function getCacheDuration();
public function getName();
public function getURI();
}
abstract class BridgeAbstract implements BridgeInterface {
const NAME = 'Unnamed bridge';
const URI = '';
const DESCRIPTION = 'No description provided';
const MAINTAINER = 'No maintainer';
const PARAMETERS = array();
public $useProxy = true;
protected $cache;
protected $items = array();
protected $inputs = array();
protected $queriedContext = '';
protected function returnError($message, $code){
throw new \HttpException($message, $code);
}
protected function returnClientError($message){
$this->returnError($message, 400);
}
protected function returnServerError($message){
$this->returnError($message, 500);
}
/**
* Return items stored in the bridge
* @return mixed
*/
public function getItems(){
return $this->items;
}
protected function validateTextValue($value, $pattern = null){
if(!is_null($pattern)){
$filteredValue = filter_var($value, FILTER_VALIDATE_REGEXP,
array('options' => array(
'regexp' => '/^' . $pattern . '$/'
))
);
} else {
$filteredValue = filter_var($value);
}
if($filteredValue === false)
return null;
return $filteredValue;
}
protected function validateNumberValue($value){
$filteredValue = filter_var($value, FILTER_VALIDATE_INT);
if($filteredValue === false && !empty($value))
return null;
return $filteredValue;
}
protected function validateCheckboxValue($value){
$filteredValue = filter_var($value, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE);
if(is_null($filteredValue))
return null;
return $filteredValue;
}
protected function validateListValue($value, $expectedValues){
$filteredValue = filter_var($value);
if($filteredValue === false)
return null;
if(!in_array($filteredValue, $expectedValues)){ // Check sub-values?
foreach($expectedValues as $subName => $subValue){
if(is_array($subValue) && in_array($filteredValue, $subValue))
return $filteredValue;
}
return null;
}
return $filteredValue;
}
protected function validateData(&$data){
if(!is_array($data))
return false;
foreach($data as $name=>$value){
$registered = false;
foreach(static::PARAMETERS as $context=>$set){
if(array_key_exists($name,$set)){
$registered = true;
if(!isset($set[$name]['type'])){
$set[$name]['type']='text';
}
switch($set[$name]['type']){
case 'number':
$data[$name] = $this->validateNumberValue($value);
break;
case 'checkbox':
$data[$name] = $this->validateCheckboxValue($value);
break;
case 'list':
$data[$name] = $this->validateListValue($value, $set[$name]['values']);
break;
default:
case 'text':
if(isset($set[$name]['pattern'])){
$data[$name] = $this->validateTextValue($value, $set[$name]['pattern']);
} else {
$data[$name] = $this->validateTextValue($value);
}
break;
}
if(is_null($data[$name])){
echo 'Parameter \'' . $name . '\' is invalid!' . PHP_EOL;
return false;
}
}
}
if(!$registered)
return false;
}
return true;
}
protected function setInputs(array $inputs, $queriedContext){
// Import and assign all inputs to their context
foreach($inputs as $name => $value){
foreach(static::PARAMETERS as $context => $set){
if(array_key_exists($name, static::PARAMETERS[$context])){
$this->inputs[$context][$name]['value'] = $value;
}
}
}
// Apply default values to missing data
$contexts = array($queriedContext);
if(array_key_exists('global', static::PARAMETERS)){
$contexts[] = 'global';
}
foreach($contexts as $context){
foreach(static::PARAMETERS[$context] as $name => $properties){
if(isset($this->inputs[$context][$name]['value'])){
continue;
}
$type = isset($properties['type']) ? $properties['type'] : 'text';
switch($type){
case 'checkbox':
if(!isset($properties['defaultValue'])){
$this->inputs[$context][$name]['value'] = false;
} else {
$this->inputs[$context][$name]['value'] = $properties['defaultValue'];
}
break;
case 'list':
if(!isset($properties['defaultValue'])){
$firstItem = reset($properties['values']);
if(is_array($firstItem)){
$firstItem = reset($firstItem);
}
$this->inputs[$context][$name]['value'] = $firstItem;
} else {
$this->inputs[$context][$name]['value'] = $properties['defaultValue'];
}
break;
default:
if(isset($properties['defaultValue'])){
$this->inputs[$context][$name]['value'] = $properties['defaultValue'];
}
break;
}
}
}
// Copy global parameter values to the guessed context
if(array_key_exists('global', static::PARAMETERS)){
foreach(static::PARAMETERS['global'] as $name => $properties){
if(isset($inputs[$name])){
$value = $inputs[$name];
} elseif (isset($properties['value'])){
$value = $properties['value'];
} else {
continue;
}
$this->inputs[$queriedContext][$name]['value'] = $value;
}
}
// Only keep guessed context parameters values
if(isset($this->inputs[$queriedContext])){
$this->inputs = array($queriedContext => $this->inputs[$queriedContext]);
} else {
$this->inputs = array();
}
}
protected function getQueriedContext(array $inputs){
$queriedContexts=array();
foreach(static::PARAMETERS as $context=>$set){
$queriedContexts[$context]=null;
foreach($set as $id=>$properties){
if(isset($inputs[$id]) && !empty($inputs[$id])){
$queriedContexts[$context]=true;
}elseif(isset($properties['required']) &&
$properties['required']===true){
$queriedContexts[$context]=false;
break;
}
}
}
if(array_key_exists('global',static::PARAMETERS) &&
$queriedContexts['global']===false){
return null;
}
unset($queriedContexts['global']);
switch(array_sum($queriedContexts)){
case 0:
foreach($queriedContexts as $context=>$queried){
if (is_null($queried)){
return $context;
}
}
return null;
case 1: return array_search(true,$queriedContexts);
default: return false;
}
}
/**
* Defined datas with parameters depending choose bridge
* Note : you can define a cache with "setCache"
* @param array array with expected bridge paramters
*/
public function setDatas(array $inputs){
if(!is_null($this->cache)){
$this->cache->prepare($inputs);
$time = $this->cache->getTime();
if($time !== false && (time() - $this->getCacheDuration() < $time)){
$this->items = $this->cache->loadData();
return;
}
}
if(empty(static::PARAMETERS)){
if(!empty($inputs)){
$this->returnClientError('Invalid parameters value(s)');
}
$this->collectData();
if(!is_null($this->cache)){
$this->cache->saveData($this->getItems());
}
return;
}
if(!$this->validateData($inputs)){
$this->returnClientError('Invalid parameters value(s)');
}
// Guess the paramter context from input data
$this->queriedContext = $this->getQueriedContext($inputs);
if(is_null($this->queriedContext)){
$this->returnClientError('Required parameter(s) missing');
} elseif($this->queriedContext === false){
$this->returnClientError('Mixed context parameters');
}
$this->setInputs($inputs, $this->queriedContext);
$this->collectData();
if(!is_null($this->cache)){
$this->cache->saveData($this->getItems());
}
}
function getInput($input){
if(!isset($this->inputs[$this->queriedContext][$input]['value'])){
return null;
}
return $this->inputs[$this->queriedContext][$input]['value'];
}
public function getName(){
return static::NAME;
}
public function getURI(){
return static::URI;
}
public function getCacheDuration(){
return 3600;
}
public function setCache(\CacheAbstract $cache){
$this->cache = $cache;
}
public function debugMessage($text){
if(!file_exists('DEBUG')) {
return;
}
$backtrace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 3);
$calling = $backtrace[2];
$message = $calling['file'] . ':'
. $calling['line'] . ' class '
. get_class($this) . '->'
. $calling['function'] . ' - '
. $text;
error_log($message);
}
protected function getContents($url
, $use_include_path = false
, $context = null
, $offset = 0
, $maxlen = null){
$contextOptions = array(
'http' => array(
'user_agent' => ini_get('user_agent')
),
);
if(defined('PROXY_URL') && $this->useProxy){
$contextOptions['http']['proxy'] = PROXY_URL;
$contextOptions['http']['request_fulluri'] = true;
if(is_null($context)){
$context = stream_context_create($contextOptions);
} else {
$prevContext=$context;
if(!stream_context_set_option($context, $contextOptions)){
$context = $prevContext;
}
}
}
if(is_null($maxlen)){
$content = @file_get_contents($url, $use_include_path, $context, $offset);
} else {
$content = @file_get_contents($url, $use_include_path, $context, $offset, $maxlen);
}
if($content === false)
$this->debugMessage('Cant\'t download ' . $url);
return $content;
}
protected function getSimpleHTMLDOM($url
, $use_include_path = false
, $context = null
, $offset = 0
, $maxLen = null
, $lowercase = true
, $forceTagsClosed = true
, $target_charset = DEFAULT_TARGET_CHARSET
, $stripRN = true
, $defaultBRText = DEFAULT_BR_TEXT
, $defaultSpanText = DEFAULT_SPAN_TEXT){
$content = $this->getContents($url, $use_include_path, $context, $offset, $maxLen);
return str_get_html($content
, $lowercase
, $forceTagsClosed
, $target_charset
, $stripRN
, $defaultBRText
, $defaultSpanText);
}
}
/**
* Extension of BridgeAbstract allowing caching of files downloaded over http.
* TODO allow file cache invalidation by touching files on access, and removing
* files/directories which have not been touched since ... a long time
*/
abstract class HttpCachingBridgeAbstract extends BridgeAbstract {
/**
* Maintain locally cached versions of pages to download, to avoid multiple downloads.
* @param url url to cache
* @return content of the file as string
*/
public function get_cached($url){
// TODO build this from the variable given to Cache
$cacheDir = __DIR__ . '/../cache/pages/';
$filepath = $this->buildCacheFilePath($url, $cacheDir);
if(file_exists($filepath)){
$this->debugMessage('loading cached file from ' . $filepath . ' for page at url ' . $url);
// TODO touch file and its parent, and try to do neighbour deletion
$this->refresh_in_cache($cacheDir, $filepath);
$content = file_get_contents($filepath);
} else {
$this->debugMessage('we have no local copy of ' . $url . ' Downloading to ' . $filepath);
$dir = substr($filepath, 0, strrpos($filepath, '/'));
if(!is_dir($dir)){
$this->debugMessage('creating directories for ' . $dir);
mkdir($dir, 0777, true);
}
$content = $this->getContents($url);
if($content !== false){
file_put_contents($filepath, $content);
}
}
return str_get_html($content);
}
public function get_cached_time($url){
// TODO build this from the variable given to Cache
$cacheDir = __DIR__ . '/../cache/pages/';
$filepath = $this->buildCacheFilePath($url, $cacheDir);
if(!file_exists($filepath)){
$this->get_cached($url);
}
return filectime($filepath);
}
private function refresh_in_cache($cacheDir, $filepath){
$currentPath = $filepath;
while(!$cacheDir == $currentPath){
touch($currentPath);
$currentPath = dirname($currentPath);
}
}
private function buildCacheFilePath($url, $cacheDir){
$simplified_url = str_replace(
['http://', 'https://', '?', '&', '='],
['', '', '/', '/', '/'],
$url);
if(substr($cacheDir, -1) !== '/'){
$cacheDir .= '/';
}
$filepath = $cacheDir . $simplified_url;
if(substr($filepath, -1) === '/'){
$filepath .= 'index.html';
}
return $filepath;
}
public function remove_from_cache($url){
// TODO build this from the variable given to Cache
$cacheDir = __DIR__ . '/../cache/pages/';
$filepath = $this->buildCacheFilePath($url, $cacheDir);
$this->debugMessage('removing from cache \'' . $filepath . '\'');
unlink($filepath);
}
}
abstract class FeedExpander extends HttpCachingBridgeAbstract {
private $name;
private $uri;
private $description;
public function collectExpandableDatas($url){
if(empty($url)){
$this->returnServerError('There is no $url for this RSS expander');
}
$this->debugMessage('Loading from ' . $url);
/* Notice we do not use cache here on purpose:
* we want a fresh view of the RSS stream each time
*/
$content = $this->getContents($url)
or $this->returnServerError('Could not request ' . $url);
$rssContent = simplexml_load_string($content);
$this->debugMessage('Detecting feed format/version');
if(isset($rssContent->channel[0])){
$this->debugMessage('Detected RSS format');
if(isset($rssContent->item[0])){
$this->debugMessage('Detected RSS 1.0 format');
$this->collect_RSS_1_0_data($rssContent);
} else {
$this->debugMessage('Detected RSS 0.9x or 2.0 format');
$this->collect_RSS_2_0_data($rssContent);
}
} elseif(isset($rssContent->entry[0])){
$this->debugMessage('Detected ATOM format');
$this->collect_ATOM_data($rssContent);
} else {
$this->debugMessage('Unknown feed format/version');
$this->returnServerError('The feed format is unknown!');
}
}
protected function collect_RSS_1_0_data($rssContent){
$this->load_RSS_2_0_feed_data($rssContent->channel[0]);
foreach($rssContent->item as $item){
$this->debugMessage('parsing item ' . var_export($item, true));
$this->items[] = $this->parseItem($item);
}
}
protected function collect_RSS_2_0_data($rssContent){
$rssContent = $rssContent->channel[0];
$this->debugMessage('RSS content is ===========\n' . var_export($rssContent, true) . '===========');
$this->load_RSS_2_0_feed_data($rssContent);
foreach($rssContent->item as $item){
$this->debugMessage('parsing item ' . var_export($item, true));
$this->items[] = $this->parseItem($item);
}
}
protected function collect_ATOM_data($content){
$this->load_ATOM_feed_data($content);
foreach($content->entry as $item){
$this->debugMessage('parsing item ' . var_export($item, true));
$this->items[] = $this->parseItem($item);
}
}
protected function RSS_2_0_time_to_timestamp($item){
return DateTime::createFromFormat('D, d M Y H:i:s e', $item->pubDate)->getTimestamp();
}
// TODO set title, link, description, language, and so on
protected function load_RSS_2_0_feed_data($rssContent){
$this->name = trim($rssContent->title);
$this->uri = trim($rssContent->link);
$this->description = trim($rssContent->description);
}
protected function load_ATOM_feed_data($content){
$this->name = $content->title;
// Find best link (only one, or first of 'alternate')
if(!isset($content->link)){
$this->uri = '';
} elseif (count($content->link) === 1){
$this->uri = $content->link[0]['href'];
} else {
$this->uri = '';
foreach($content->link as $link){
if(strtolower($link['rel']) === 'alternate'){
$this->uri = $link['href'];
break;
}
}
}
if(isset($content->subtitle))
$this->description = $content->subtitle;
}
protected function parseATOMItem($feedItem){
$item = array();
if(isset($feedItem->id)) $item['uri'] = $feedItem->id;
if(isset($feedItem->title)) $item['title'] = $feedItem->title;
if(isset($feedItem->updated)) $item['timestamp'] = strtotime($feedItem->updated);
if(isset($feedItem->author)) $item['author'] = $feedItem->author->name;
if(isset($feedItem->content)) $item['content'] = $feedItem->content;
return $item;
}
protected function parseRSS_0_9_1_Item($feedItem){
$item = array();
if(isset($feedItem->link)) $item['uri'] = $feedItem->link;
if(isset($feedItem->title)) $item['title'] = $feedItem->title;
// rss 0.91 doesn't support timestamps
// rss 0.91 doesn't support authors
if(isset($feedItem->description)) $item['content'] = $feedItem->description;
return $item;
}
protected function parseRSS_1_0_Item($feedItem){
// 1.0 adds optional elements around the 0.91 standard
$item = $this->parseRSS_0_9_1_Item($feedItem);
$namespaces = $feedItem->getNamespaces(true);
if(isset($namespaces['dc'])){
$dc = $feedItem->children($namespaces['dc']);
if(isset($dc->date)) $item['timestamp'] = strtotime($dc->date);
if(isset($dc->creator)) $item['author'] = $dc->creator;
}
return $item;
}
protected function parseRSS_2_0_Item($feedItem){
// Primary data is compatible to 0.91 with some additional data
$item = $this->parseRSS_0_9_1_Item($feedItem);
$namespaces = $feedItem->getNamespaces(true);
if(isset($namespaces['dc'])) $dc = $feedItem->children($namespaces['dc']);
if(isset($feedItem->pubDate)){
$item['timestamp'] = strtotime($feedItem->pubDate);
} elseif(isset($dc->date)){
$item['timestamp'] = strtotime($dc->date);
}
if(isset($feedItem->author)){
$item['author'] = $feedItem->author;
} elseif(isset($dc->creator)){
$item['author'] = $dc->creator;
}
return $item;
}
/**
* Method should return, from a source RSS item given by lastRSS, one of our Items objects
* @param $item the input rss item
* @return a RSS-Bridge Item, with (hopefully) the whole content)
*/
abstract protected function parseItem($item);
public function getURI(){
return $this->uri;
}
public function getName(){
return $this->name;
}
public function getDescription(){
return $this->description;
}
}

389
lib/BridgeAbstract.php Normal file
View file

@ -0,0 +1,389 @@
<?php
require_once(__DIR__ . '/BridgeInterface.php');
abstract class BridgeAbstract implements BridgeInterface {
const NAME = 'Unnamed bridge';
const URI = '';
const DESCRIPTION = 'No description provided';
const MAINTAINER = 'No maintainer';
const PARAMETERS = array();
public $useProxy = true;
protected $cache;
protected $items = array();
protected $inputs = array();
protected $queriedContext = '';
protected function returnError($message, $code){
throw new \HttpException($message, $code);
}
protected function returnClientError($message){
$this->returnError($message, 400);
}
protected function returnServerError($message){
$this->returnError($message, 500);
}
/**
* Return items stored in the bridge
* @return mixed
*/
public function getItems(){
return $this->items;
}
protected function validateTextValue($value, $pattern = null){
if(!is_null($pattern)){
$filteredValue = filter_var($value, FILTER_VALIDATE_REGEXP,
array('options' => array(
'regexp' => '/^' . $pattern . '$/'
))
);
} else {
$filteredValue = filter_var($value);
}
if($filteredValue === false)
return null;
return $filteredValue;
}
protected function validateNumberValue($value){
$filteredValue = filter_var($value, FILTER_VALIDATE_INT);
if($filteredValue === false && !empty($value))
return null;
return $filteredValue;
}
protected function validateCheckboxValue($value){
$filteredValue = filter_var($value, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE);
if(is_null($filteredValue))
return null;
return $filteredValue;
}
protected function validateListValue($value, $expectedValues){
$filteredValue = filter_var($value);
if($filteredValue === false)
return null;
if(!in_array($filteredValue, $expectedValues)){ // Check sub-values?
foreach($expectedValues as $subName => $subValue){
if(is_array($subValue) && in_array($filteredValue, $subValue))
return $filteredValue;
}
return null;
}
return $filteredValue;
}
protected function validateData(&$data){
if(!is_array($data))
return false;
foreach($data as $name=>$value){
$registered = false;
foreach(static::PARAMETERS as $context=>$set){
if(array_key_exists($name,$set)){
$registered = true;
if(!isset($set[$name]['type'])){
$set[$name]['type']='text';
}
switch($set[$name]['type']){
case 'number':
$data[$name] = $this->validateNumberValue($value);
break;
case 'checkbox':
$data[$name] = $this->validateCheckboxValue($value);
break;
case 'list':
$data[$name] = $this->validateListValue($value, $set[$name]['values']);
break;
default:
case 'text':
if(isset($set[$name]['pattern'])){
$data[$name] = $this->validateTextValue($value, $set[$name]['pattern']);
} else {
$data[$name] = $this->validateTextValue($value);
}
break;
}
if(is_null($data[$name])){
echo 'Parameter \'' . $name . '\' is invalid!' . PHP_EOL;
return false;
}
}
}
if(!$registered)
return false;
}
return true;
}
protected function setInputs(array $inputs, $queriedContext){
// Import and assign all inputs to their context
foreach($inputs as $name => $value){
foreach(static::PARAMETERS as $context => $set){
if(array_key_exists($name, static::PARAMETERS[$context])){
$this->inputs[$context][$name]['value'] = $value;
}
}
}
// Apply default values to missing data
$contexts = array($queriedContext);
if(array_key_exists('global', static::PARAMETERS)){
$contexts[] = 'global';
}
foreach($contexts as $context){
foreach(static::PARAMETERS[$context] as $name => $properties){
if(isset($this->inputs[$context][$name]['value'])){
continue;
}
$type = isset($properties['type']) ? $properties['type'] : 'text';
switch($type){
case 'checkbox':
if(!isset($properties['defaultValue'])){
$this->inputs[$context][$name]['value'] = false;
} else {
$this->inputs[$context][$name]['value'] = $properties['defaultValue'];
}
break;
case 'list':
if(!isset($properties['defaultValue'])){
$firstItem = reset($properties['values']);
if(is_array($firstItem)){
$firstItem = reset($firstItem);
}
$this->inputs[$context][$name]['value'] = $firstItem;
} else {
$this->inputs[$context][$name]['value'] = $properties['defaultValue'];
}
break;
default:
if(isset($properties['defaultValue'])){
$this->inputs[$context][$name]['value'] = $properties['defaultValue'];
}
break;
}
}
}
// Copy global parameter values to the guessed context
if(array_key_exists('global', static::PARAMETERS)){
foreach(static::PARAMETERS['global'] as $name => $properties){
if(isset($inputs[$name])){
$value = $inputs[$name];
} elseif (isset($properties['value'])){
$value = $properties['value'];
} else {
continue;
}
$this->inputs[$queriedContext][$name]['value'] = $value;
}
}
// Only keep guessed context parameters values
if(isset($this->inputs[$queriedContext])){
$this->inputs = array($queriedContext => $this->inputs[$queriedContext]);
} else {
$this->inputs = array();
}
}
protected function getQueriedContext(array $inputs){
$queriedContexts=array();
foreach(static::PARAMETERS as $context=>$set){
$queriedContexts[$context]=null;
foreach($set as $id=>$properties){
if(isset($inputs[$id]) && !empty($inputs[$id])){
$queriedContexts[$context]=true;
}elseif(isset($properties['required']) &&
$properties['required']===true){
$queriedContexts[$context]=false;
break;
}
}
}
if(array_key_exists('global',static::PARAMETERS) &&
$queriedContexts['global']===false){
return null;
}
unset($queriedContexts['global']);
switch(array_sum($queriedContexts)){
case 0:
foreach($queriedContexts as $context=>$queried){
if (is_null($queried)){
return $context;
}
}
return null;
case 1: return array_search(true,$queriedContexts);
default: return false;
}
}
/**
* Defined datas with parameters depending choose bridge
* Note : you can define a cache with "setCache"
* @param array array with expected bridge paramters
*/
public function setDatas(array $inputs){
if(!is_null($this->cache)){
$this->cache->prepare($inputs);
$time = $this->cache->getTime();
if($time !== false && (time() - $this->getCacheDuration() < $time)){
$this->items = $this->cache->loadData();
return;
}
}
if(empty(static::PARAMETERS)){
if(!empty($inputs)){
$this->returnClientError('Invalid parameters value(s)');
}
$this->collectData();
if(!is_null($this->cache)){
$this->cache->saveData($this->getItems());
}
return;
}
if(!$this->validateData($inputs)){
$this->returnClientError('Invalid parameters value(s)');
}
// Guess the paramter context from input data
$this->queriedContext = $this->getQueriedContext($inputs);
if(is_null($this->queriedContext)){
$this->returnClientError('Required parameter(s) missing');
} elseif($this->queriedContext === false){
$this->returnClientError('Mixed context parameters');
}
$this->setInputs($inputs, $this->queriedContext);
$this->collectData();
if(!is_null($this->cache)){
$this->cache->saveData($this->getItems());
}
}
function getInput($input){
if(!isset($this->inputs[$this->queriedContext][$input]['value'])){
return null;
}
return $this->inputs[$this->queriedContext][$input]['value'];
}
public function getName(){
return static::NAME;
}
public function getURI(){
return static::URI;
}
public function getCacheDuration(){
return 3600;
}
public function setCache(\CacheAbstract $cache){
$this->cache = $cache;
}
public function debugMessage($text){
if(!file_exists('DEBUG')) {
return;
}
$backtrace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 3);
$calling = $backtrace[2];
$message = $calling['file'] . ':'
. $calling['line'] . ' class '
. get_class($this) . '->'
. $calling['function'] . ' - '
. $text;
error_log($message);
}
protected function getContents($url
, $use_include_path = false
, $context = null
, $offset = 0
, $maxlen = null){
$contextOptions = array(
'http' => array(
'user_agent' => ini_get('user_agent')
),
);
if(defined('PROXY_URL') && $this->useProxy){
$contextOptions['http']['proxy'] = PROXY_URL;
$contextOptions['http']['request_fulluri'] = true;
if(is_null($context)){
$context = stream_context_create($contextOptions);
} else {
$prevContext=$context;
if(!stream_context_set_option($context, $contextOptions)){
$context = $prevContext;
}
}
}
if(is_null($maxlen)){
$content = @file_get_contents($url, $use_include_path, $context, $offset);
} else {
$content = @file_get_contents($url, $use_include_path, $context, $offset, $maxlen);
}
if($content === false)
$this->debugMessage('Cant\'t download ' . $url);
return $content;
}
protected function getSimpleHTMLDOM($url
, $use_include_path = false
, $context = null
, $offset = 0
, $maxLen = null
, $lowercase = true
, $forceTagsClosed = true
, $target_charset = DEFAULT_TARGET_CHARSET
, $stripRN = true
, $defaultBRText = DEFAULT_BR_TEXT
, $defaultSpanText = DEFAULT_SPAN_TEXT){
$content = $this->getContents($url, $use_include_path, $context, $offset, $maxLen);
return str_get_html($content
, $lowercase
, $forceTagsClosed
, $target_charset
, $stripRN
, $defaultBRText
, $defaultSpanText);
}
}

7
lib/BridgeInterface.php Normal file
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@ -0,0 +1,7 @@
<?php
interface BridgeInterface {
public function collectData();
public function getCacheDuration();
public function getName();
public function getURI();
}

22
lib/Cache.php
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@ -1,25 +1,5 @@
<?php
/**
* All cache logic
* Note : adapter are store in other place
*/
interface CacheInterface{
public function loadData();
public function saveData($datas);
public function getTime();
}
abstract class CacheAbstract implements CacheInterface{
protected $param;
public function prepare(array $param){
$this->param = $param;
return $this;
}
}
require_once(__DIR__ . '/CacheInterface.php');
class Cache{
static protected $dirCache;

11
lib/CacheAbstract.php Normal file
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@ -0,0 +1,11 @@
<?php
require_once(__DIR__ . '/CacheInterface.php');
abstract class CacheAbstract implements CacheInterface{
protected $param;
public function prepare(array $param){
$this->param = $param;
return $this;
}
}

6
lib/CacheInterface.php Normal file
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<?php
interface CacheInterface{
public function loadData();
public function saveData($datas);
public function getTime();
}

173
lib/FeedExpander.php Normal file
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@ -0,0 +1,173 @@
<?php
require_once(__DIR__ . '/BridgeInterface.php');
abstract class FeedExpander extends HttpCachingBridgeAbstract {
private $name;
private $uri;
private $description;
public function collectExpandableDatas($url){
if(empty($url)){
$this->returnServerError('There is no $url for this RSS expander');
}
$this->debugMessage('Loading from ' . $url);
/* Notice we do not use cache here on purpose:
* we want a fresh view of the RSS stream each time
*/
$content = $this->getContents($url)
or $this->returnServerError('Could not request ' . $url);
$rssContent = simplexml_load_string($content);
$this->debugMessage('Detecting feed format/version');
if(isset($rssContent->channel[0])){
$this->debugMessage('Detected RSS format');
if(isset($rssContent->item[0])){
$this->debugMessage('Detected RSS 1.0 format');
$this->collect_RSS_1_0_data($rssContent);
} else {
$this->debugMessage('Detected RSS 0.9x or 2.0 format');
$this->collect_RSS_2_0_data($rssContent);
}
} elseif(isset($rssContent->entry[0])){
$this->debugMessage('Detected ATOM format');
$this->collect_ATOM_data($rssContent);
} else {
$this->debugMessage('Unknown feed format/version');
$this->returnServerError('The feed format is unknown!');
}
}
protected function collect_RSS_1_0_data($rssContent){
$this->load_RSS_2_0_feed_data($rssContent->channel[0]);
foreach($rssContent->item as $item){
$this->debugMessage('parsing item ' . var_export($item, true));
$this->items[] = $this->parseItem($item);
}
}
protected function collect_RSS_2_0_data($rssContent){
$rssContent = $rssContent->channel[0];
$this->debugMessage('RSS content is ===========\n' . var_export($rssContent, true) . '===========');
$this->load_RSS_2_0_feed_data($rssContent);
foreach($rssContent->item as $item){
$this->debugMessage('parsing item ' . var_export($item, true));
$this->items[] = $this->parseItem($item);
}
}
protected function collect_ATOM_data($content){
$this->load_ATOM_feed_data($content);
foreach($content->entry as $item){
$this->debugMessage('parsing item ' . var_export($item, true));
$this->items[] = $this->parseItem($item);
}
}
protected function RSS_2_0_time_to_timestamp($item){
return DateTime::createFromFormat('D, d M Y H:i:s e', $item->pubDate)->getTimestamp();
}
// TODO set title, link, description, language, and so on
protected function load_RSS_2_0_feed_data($rssContent){
$this->name = trim($rssContent->title);
$this->uri = trim($rssContent->link);
$this->description = trim($rssContent->description);
}
protected function load_ATOM_feed_data($content){
$this->name = $content->title;
// Find best link (only one, or first of 'alternate')
if(!isset($content->link)){
$this->uri = '';
} elseif (count($content->link) === 1){
$this->uri = $content->link[0]['href'];
} else {
$this->uri = '';
foreach($content->link as $link){
if(strtolower($link['rel']) === 'alternate'){
$this->uri = $link['href'];
break;
}
}
}
if(isset($content->subtitle))
$this->description = $content->subtitle;
}
protected function parseATOMItem($feedItem){
$item = array();
if(isset($feedItem->id)) $item['uri'] = $feedItem->id;
if(isset($feedItem->title)) $item['title'] = $feedItem->title;
if(isset($feedItem->updated)) $item['timestamp'] = strtotime($feedItem->updated);
if(isset($feedItem->author)) $item['author'] = $feedItem->author->name;
if(isset($feedItem->content)) $item['content'] = $feedItem->content;
return $item;
}
protected function parseRSS_0_9_1_Item($feedItem){
$item = array();
if(isset($feedItem->link)) $item['uri'] = $feedItem->link;
if(isset($feedItem->title)) $item['title'] = $feedItem->title;
// rss 0.91 doesn't support timestamps
// rss 0.91 doesn't support authors
if(isset($feedItem->description)) $item['content'] = $feedItem->description;
return $item;
}
protected function parseRSS_1_0_Item($feedItem){
// 1.0 adds optional elements around the 0.91 standard
$item = $this->parseRSS_0_9_1_Item($feedItem);
$namespaces = $feedItem->getNamespaces(true);
if(isset($namespaces['dc'])){
$dc = $feedItem->children($namespaces['dc']);
if(isset($dc->date)) $item['timestamp'] = strtotime($dc->date);
if(isset($dc->creator)) $item['author'] = $dc->creator;
}
return $item;
}
protected function parseRSS_2_0_Item($feedItem){
// Primary data is compatible to 0.91 with some additional data
$item = $this->parseRSS_0_9_1_Item($feedItem);
$namespaces = $feedItem->getNamespaces(true);
if(isset($namespaces['dc'])) $dc = $feedItem->children($namespaces['dc']);
if(isset($feedItem->pubDate)){
$item['timestamp'] = strtotime($feedItem->pubDate);
} elseif(isset($dc->date)){
$item['timestamp'] = strtotime($dc->date);
}
if(isset($feedItem->author)){
$item['author'] = $feedItem->author;
} elseif(isset($dc->creator)){
$item['author'] = $dc->creator;
}
return $item;
}
/**
* Method should return, from a source RSS item given by lastRSS, one of our Items objects
* @param $item the input rss item
* @return a RSS-Bridge Item, with (hopefully) the whole content)
*/
abstract protected function parseItem($item);
public function getURI(){
return $this->uri;
}
public function getName(){
return $this->name;
}
public function getDescription(){
return $this->description;
}
}

118
lib/Format.php
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@ -1,121 +1,5 @@
<?php
/**
* All format logic
* Note : adapter are store in other place
*/
interface FormatInterface{
public function stringify();
public function display();
public function setItems(array $bridges);
}
abstract class FormatAbstract implements FormatInterface{
const DEFAULT_CHARSET = 'UTF-8';
protected
$contentType,
$charset,
$items,
$extraInfos
;
public function setCharset($charset){
$this->charset = $charset;
return $this;
}
public function getCharset(){
$charset = $this->charset;
return is_null($charset) ? self::DEFAULT_CHARSET : $charset;
}
protected function setContentType($contentType){
$this->contentType = $contentType;
return $this;
}
protected function callContentType(){
header('Content-Type: ' . $this->contentType);
}
public function display(){
echo $this->stringify();
return $this;
}
public function setItems(array $items){
$this->items = array_map(array($this, 'array_trim'), $items);
return $this;
}
public function getItems(){
if(!is_array($this->items))
throw new \LogicException('Feed the ' . get_class($this) . ' with "setItems" method before !');
return $this->items;
}
/**
* Define common informations can be required by formats and set default value for unknow values
* @param array $extraInfos array with know informations (there isn't merge !!!)
* @return this
*/
public function setExtraInfos(array $extraInfos = array()){
foreach(array('name', 'uri') as $infoName){
if( !isset($extraInfos[$infoName]) ){
$extraInfos[$infoName] = '';
}
}
$this->extraInfos = $extraInfos;
return $this;
}
/**
* Return extra infos
* @return array See "setExtraInfos" detail method to know what extra are disponibles
*/
public function getExtraInfos(){
if( is_null($this->extraInfos) ){ // No extra info ?
$this->setExtraInfos(); // Define with default value
}
return $this->extraInfos;
}
/**
* Sanitized html while leaving it functionnal.
* The aim is to keep html as-is (with clickable hyperlinks)
* while reducing annoying and potentially dangerous things.
* Yes, I know sanitizing HTML 100% is an impossible task.
* Maybe we'll switch to http://htmlpurifier.org/
* or http://www.bioinformatics.org/phplabware/internal_utilities/htmLawed/index.php
*/
protected function sanitizeHtml($html)
{
$html = str_replace('<script','<&zwnj;script',$html); // Disable scripts, but leave them visible.
$html = str_replace('<iframe','<&zwnj;iframe',$html);
$html = str_replace('<link','<&zwnj;link',$html);
// We leave alone object and embed so that videos can play in RSS readers.
return $html;
}
protected function array_trim($elements){
foreach($elements as $key => $value){
if(is_string($value))
$elements[$key] = trim($value);
}
return $elements;
}
}
require_once(__DIR__ . '/FormatInterface.php');
class Format{
static protected $dirFormat;

107
lib/FormatAbstract.php Normal file
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@ -0,0 +1,107 @@
<?php
require_once(__DIR__ . '/FormatInterface.php');
abstract class FormatAbstract implements FormatInterface{
const DEFAULT_CHARSET = 'UTF-8';
protected
$contentType,
$charset,
$items,
$extraInfos
;
public function setCharset($charset){
$this->charset = $charset;
return $this;
}
public function getCharset(){
$charset = $this->charset;
return is_null($charset) ? self::DEFAULT_CHARSET : $charset;
}
protected function setContentType($contentType){
$this->contentType = $contentType;
return $this;
}
protected function callContentType(){
header('Content-Type: ' . $this->contentType);
}
public function display(){
echo $this->stringify();
return $this;
}
public function setItems(array $items){
$this->items = array_map(array($this, 'array_trim'), $items);
return $this;
}
public function getItems(){
if(!is_array($this->items))
throw new \LogicException('Feed the ' . get_class($this) . ' with "setItems" method before !');
return $this->items;
}
/**
* Define common informations can be required by formats and set default value for unknow values
* @param array $extraInfos array with know informations (there isn't merge !!!)
* @return this
*/
public function setExtraInfos(array $extraInfos = array()){
foreach(array('name', 'uri') as $infoName){
if( !isset($extraInfos[$infoName]) ){
$extraInfos[$infoName] = '';
}
}
$this->extraInfos = $extraInfos;
return $this;
}
/**
* Return extra infos
* @return array See "setExtraInfos" detail method to know what extra are disponibles
*/
public function getExtraInfos(){
if( is_null($this->extraInfos) ){ // No extra info ?
$this->setExtraInfos(); // Define with default value
}
return $this->extraInfos;
}
/**
* Sanitized html while leaving it functionnal.
* The aim is to keep html as-is (with clickable hyperlinks)
* while reducing annoying and potentially dangerous things.
* Yes, I know sanitizing HTML 100% is an impossible task.
* Maybe we'll switch to http://htmlpurifier.org/
* or http://www.bioinformatics.org/phplabware/internal_utilities/htmLawed/index.php
*/
protected function sanitizeHtml($html)
{
$html = str_replace('<script','<&zwnj;script',$html); // Disable scripts, but leave them visible.
$html = str_replace('<iframe','<&zwnj;iframe',$html);
$html = str_replace('<link','<&zwnj;link',$html);
// We leave alone object and embed so that videos can play in RSS readers.
return $html;
}
protected function array_trim($elements){
foreach($elements as $key => $value){
if(is_string($value))
$elements[$key] = trim($value);
}
return $elements;
}
}

6
lib/FormatInterface.php Normal file
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@ -0,0 +1,6 @@
<?php
interface FormatInterface{
public function stringify();
public function display();
public function setItems(array $bridges);
}

89
lib/HttpCachingBridgeAbstract.php Normal file
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@ -0,0 +1,89 @@
<?php
require_once(__DIR__ . '/BridgeInterface.php');
/**
* Extension of BridgeAbstract allowing caching of files downloaded over http.
* TODO allow file cache invalidation by touching files on access, and removing
* files/directories which have not been touched since ... a long time
*/
abstract class HttpCachingBridgeAbstract extends BridgeAbstract {
/**
* Maintain locally cached versions of pages to download, to avoid multiple downloads.
* @param url url to cache
* @return content of the file as string
*/
public function get_cached($url){
// TODO build this from the variable given to Cache
$cacheDir = __DIR__ . '/../cache/pages/';
$filepath = $this->buildCacheFilePath($url, $cacheDir);
if(file_exists($filepath)){
$this->debugMessage('loading cached file from ' . $filepath . ' for page at url ' . $url);
// TODO touch file and its parent, and try to do neighbour deletion
$this->refresh_in_cache($cacheDir, $filepath);
$content = file_get_contents($filepath);
} else {
$this->debugMessage('we have no local copy of ' . $url . ' Downloading to ' . $filepath);
$dir = substr($filepath, 0, strrpos($filepath, '/'));
if(!is_dir($dir)){
$this->debugMessage('creating directories for ' . $dir);
mkdir($dir, 0777, true);
}
$content = $this->getContents($url);
if($content !== false){
file_put_contents($filepath, $content);
}
}
return str_get_html($content);
}
public function get_cached_time($url){
// TODO build this from the variable given to Cache
$cacheDir = __DIR__ . '/../cache/pages/';
$filepath = $this->buildCacheFilePath($url, $cacheDir);
if(!file_exists($filepath)){
$this->get_cached($url);
}
return filectime($filepath);
}
private function refresh_in_cache($cacheDir, $filepath){
$currentPath = $filepath;
while(!$cacheDir == $currentPath){
touch($currentPath);
$currentPath = dirname($currentPath);
}
}
private function buildCacheFilePath($url, $cacheDir){
$simplified_url = str_replace(
['http://', 'https://', '?', '&', '='],
['', '', '/', '/', '/'],
$url);
if(substr($cacheDir, -1) !== '/'){
$cacheDir .= '/';
}
$filepath = $cacheDir . $simplified_url;
if(substr($filepath, -1) === '/'){
$filepath .= 'index.html';
}
return $filepath;
}
public function remove_from_cache($url){
// TODO build this from the variable given to Cache
$cacheDir = __DIR__ . '/../cache/pages/';
$filepath = $this->buildCacheFilePath($url, $cacheDir);
$this->debugMessage('removing from cache \'' . $filepath . '\'');
unlink($filepath);
}
}

5
lib/RssBridge.php
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@ -9,8 +9,13 @@ define('PATH_VENDOR', '/../vendor');
require __DIR__ . '/Exceptions.php';
require __DIR__ . '/Format.php';
require __DIR__ . '/FormatAbstract.php';
require __DIR__ . '/Bridge.php';
require __DIR__ . '/BridgeAbstract.php';
require __DIR__ . '/HttpCachingBridgeAbstract.php';
require __DIR__ . '/FeedExpander.php';
require __DIR__ . '/Cache.php';
require __DIR__ . '/CacheAbstract.php';
require __DIR__ . '/HTMLUtils.php';
$vendorLibSimpleHtmlDom = __DIR__ . PATH_VENDOR . '/simplehtmldom/simple_html_dom.php';