Created feeds and UI for feeds and newsletter
🚀 Deploy website on push / 🎉 Deploy (push) Successful in 19s
🚀 Deploy website on push / 🎉 Deploy (push) Successful in 19s
Signed-off-by: rodude123 <rodude123@gmail.com>
This commit is contained in:
+386
@@ -0,0 +1,386 @@
|
||||
<?php
|
||||
|
||||
namespace api\utils\feedGenerator;
|
||||
|
||||
require_once "FeedItem.php";
|
||||
|
||||
/**
|
||||
* Universal Feed Writer class
|
||||
*
|
||||
* Generate RSS 1.0, RSS 2.0, and Atom Feed
|
||||
*
|
||||
* @package UniversalFeedWriter
|
||||
* @link http://www.ajaxray.com/projects/rss
|
||||
*/
|
||||
class FeedWriter
|
||||
{
|
||||
private array $channels = []; // Collection of channel elements
|
||||
private array $items = []; // Collection of items as objects of FeedItem class
|
||||
private array $data = []; // Store some other version-wise data
|
||||
private array $CDATAEncoding = []; // The tag names that need to be encoded as CDATA
|
||||
|
||||
private string $version;
|
||||
|
||||
/**
|
||||
* Constructor
|
||||
*
|
||||
* @param string $version The version (RSS1, RSS2, ATOM).
|
||||
*/
|
||||
public function __construct(string $version = RSS2)
|
||||
{
|
||||
$this->version = $version;
|
||||
|
||||
// Setting default values for essential channel elements
|
||||
$this->channels['title'] = $version . ' Feed';
|
||||
$this->channels['link'] = 'http://www.ajaxray.com/blog';
|
||||
$this->channels["feedUrl"] = "http://example.com/feed";
|
||||
|
||||
// Tag names to encode in CDATA
|
||||
$this->CDATAEncoding = ['description', 'content:encoded', 'summary'];
|
||||
}
|
||||
|
||||
// Public functions
|
||||
|
||||
/**
|
||||
* Set a channel element
|
||||
*
|
||||
* @param string $elementName Name of the channel tag
|
||||
* @param string $content Content of the channel tag
|
||||
*/
|
||||
public function setChannelElement(string $elementName, string|array $content): void
|
||||
{
|
||||
$this->channels[$elementName] = $content;
|
||||
}
|
||||
|
||||
/**
|
||||
* Generate the actual RSS/Atom file
|
||||
*/
|
||||
public function generateFeed(): void
|
||||
{
|
||||
$this->printHead();
|
||||
$this->printChannels();
|
||||
$this->printItems();
|
||||
$this->printTail();
|
||||
}
|
||||
|
||||
/**
|
||||
* Create a new FeedItem.
|
||||
*
|
||||
* @return FeedItem An instance of FeedItem class
|
||||
*/
|
||||
public function createNewItem(): FeedItem
|
||||
{
|
||||
$item = new FeedItem($this->version);
|
||||
return $item;
|
||||
}
|
||||
|
||||
/**
|
||||
* Add a FeedItem to the main class
|
||||
*
|
||||
* @param FeedItem $feedItem An instance of FeedItem class
|
||||
*/
|
||||
public function addItem(FeedItem $feedItem): void
|
||||
{
|
||||
$this->items[] = $feedItem;
|
||||
}
|
||||
|
||||
// Wrapper functions
|
||||
|
||||
/**
|
||||
* Set the 'title' channel element
|
||||
*
|
||||
* @param string $title Value of 'title' channel tag
|
||||
*/
|
||||
public function setTitle(string $title): void
|
||||
{
|
||||
$this->setChannelElement('title', $title);
|
||||
}
|
||||
|
||||
/**
|
||||
* Set the 'description' channel element
|
||||
*
|
||||
* @param string $description Value of 'description' channel tag
|
||||
*/
|
||||
public function setDescription(string $description): void
|
||||
{
|
||||
$this->setChannelElement('description', $description);
|
||||
}
|
||||
|
||||
/**
|
||||
* Set the 'link' channel element
|
||||
*
|
||||
* @param string $link Value of 'link' channel tag
|
||||
*/
|
||||
public function setLink(string $link): void
|
||||
{
|
||||
$this->setChannelElement('link', $link);
|
||||
}
|
||||
|
||||
/**
|
||||
* Set the 'image' channel element
|
||||
*
|
||||
* @param string $title Title of the image
|
||||
* @param string $link Link URL of the image
|
||||
* @param string $url Path URL of the image
|
||||
*/
|
||||
public function setImage(string $title, string $link, string $url): void
|
||||
{
|
||||
$this->setChannelElement('image', ['title' => $title, 'link' => $link, 'url' => $url]);
|
||||
}
|
||||
|
||||
/**
|
||||
* Set the 'about' channel element. Only for RSS 1.0
|
||||
*
|
||||
* @param string $url Value of 'about' channel tag
|
||||
*/
|
||||
public function setChannelAbout(string $url): void
|
||||
{
|
||||
$this->data['ChannelAbout'] = $url;
|
||||
}
|
||||
|
||||
// Other functions
|
||||
|
||||
/**
|
||||
* Generates a UUID
|
||||
*
|
||||
* @param string $key An optional prefix
|
||||
* @param string $prefix A prefix
|
||||
* @return string The formatted UUID
|
||||
*/
|
||||
public static function uuid(?string $key = null, string $prefix = ''): string
|
||||
{
|
||||
$key = $key ?? uniqid((string)rand());
|
||||
$chars = md5($key);
|
||||
$uuid = substr($chars, 0, 8) . '-';
|
||||
$uuid .= substr($chars, 8, 4) . '-';
|
||||
$uuid .= substr($chars, 12, 4) . '-';
|
||||
$uuid .= substr($chars, 16, 4) . '-';
|
||||
$uuid .= substr($chars, 20, 12);
|
||||
|
||||
return $prefix . $uuid;
|
||||
}
|
||||
|
||||
// Private functions
|
||||
|
||||
/**
|
||||
* Prints the XML and RSS namespace
|
||||
*/
|
||||
private function printHead(): void
|
||||
{
|
||||
$out = '<?xml version="1.0" encoding="utf-8"?>' . "\n";
|
||||
|
||||
if ($this->version == RSS2)
|
||||
{
|
||||
$out .= '<rss version="2.0"
|
||||
xmlns:content="http://purl.org/rss/1.0/modules/content/"
|
||||
xmlns:wfw="http://wellformedweb.org/CommentAPI/"
|
||||
>' . PHP_EOL;
|
||||
}
|
||||
elseif ($this->version == RSS1)
|
||||
{
|
||||
$out .= '<rdf:RDF
|
||||
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
|
||||
xmlns="http://purl.org/rss/1.0/"
|
||||
xmlns:dc="http://purl.org/dc/elements/1.1/"
|
||||
>' . PHP_EOL;
|
||||
}
|
||||
elseif ($this->version == ATOM)
|
||||
{
|
||||
$out .= '<feed xmlns="http://www.w3.org/2005/Atom">' . PHP_EOL;
|
||||
}
|
||||
echo $out;
|
||||
}
|
||||
|
||||
/**
|
||||
* Closes the open tags at the end of the file
|
||||
*/
|
||||
private function printTail(): void
|
||||
{
|
||||
if ($this->version == RSS2)
|
||||
{
|
||||
echo '</channel>' . PHP_EOL . '</rss>';
|
||||
}
|
||||
elseif ($this->version == RSS1)
|
||||
{
|
||||
echo '</rdf:RDF>';
|
||||
}
|
||||
elseif ($this->version == ATOM)
|
||||
{
|
||||
echo '</feed>';
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Creates a single node in XML format
|
||||
*
|
||||
* @param string $tagName Name of the tag
|
||||
* @param mixed $tagContent Tag value as a string or an array of nested tags in 'tagName' => 'tagValue' format
|
||||
* @param array|null $attributes Attributes (if any) in 'attrName' => 'attrValue' format
|
||||
* @return string Formatted XML tag
|
||||
*/
|
||||
private function makeNode(string $tagName, $tagContent, ?array $attributes = null): string
|
||||
{
|
||||
$nodeText = '';
|
||||
$attrText = '';
|
||||
|
||||
if (is_array($attributes))
|
||||
{
|
||||
foreach ($attributes as $key => $value)
|
||||
{
|
||||
$attrText .= " $key=\"$value\"";
|
||||
}
|
||||
}
|
||||
|
||||
if (is_array($tagContent) && $this->version == RSS1)
|
||||
{
|
||||
$attrText = ' rdf:parseType="Resource"';
|
||||
}
|
||||
|
||||
$attrText .= (in_array($tagName, $this->CDATAEncoding) && $this->version == ATOM) ? ' type="html" ' : '';
|
||||
$nodeText .= (in_array($tagName, $this->CDATAEncoding)) ? "<{$tagName}{$attrText}><![CDATA[" : "<{$tagName}{$attrText}>";
|
||||
|
||||
if (is_array($tagContent))
|
||||
{
|
||||
foreach ($tagContent as $key => $value)
|
||||
{
|
||||
$nodeText .= $this->makeNode($key, $value);
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
$nodeText .= (in_array($tagName, $this->CDATAEncoding)) ? $tagContent : htmlentities($tagContent);
|
||||
}
|
||||
|
||||
$nodeText .= (in_array($tagName, $this->CDATAEncoding)) ? "]]></$tagName>" : "</$tagName>";
|
||||
|
||||
return $nodeText . PHP_EOL;
|
||||
}
|
||||
|
||||
/**
|
||||
* Prints channel elements
|
||||
*/
|
||||
private function printChannels(): void
|
||||
{
|
||||
// Start channel tag
|
||||
switch ($this->version)
|
||||
{
|
||||
case RSS2:
|
||||
echo '<channel>' . PHP_EOL;
|
||||
break;
|
||||
case RSS1:
|
||||
echo (isset($this->data['ChannelAbout'])) ? "<channel rdf:about=\"{$this->data['ChannelAbout']}\">" : "<channel rdf:about=\"{$this->channels['link']}\">";
|
||||
break;
|
||||
}
|
||||
|
||||
// Print items of channel
|
||||
foreach ($this->channels as $key => $value)
|
||||
{
|
||||
if ($this->version == ATOM && $key == 'link')
|
||||
{
|
||||
// ATOM prints the link element as an href attribute
|
||||
echo $this->makeNode($key, '', ['href' => $value]);
|
||||
// Add the id for ATOM
|
||||
echo $this->makeNode('id', $this->uuid($value, 'urn:uuid:'));
|
||||
}
|
||||
else if ($this->version == ATOM && $key == 'feedUrl')
|
||||
{
|
||||
echo $this->makeNode('link', '', ['rel' => 'self', 'href' => $value]);
|
||||
}
|
||||
else
|
||||
{
|
||||
echo $this->makeNode($key, $value);
|
||||
}
|
||||
}
|
||||
|
||||
// RSS 1.0 has a special tag <rdf:Seq> with channel
|
||||
if ($this->version == RSS1)
|
||||
{
|
||||
echo "<items>" . PHP_EOL . "<rdf:Seq>" . PHP_EOL;
|
||||
foreach ($this->items as $item)
|
||||
{
|
||||
$thisItems = $item->getElements();
|
||||
echo "<rdf:li resource=\"{$thisItems['link']['content']}\"/>" . PHP_EOL;
|
||||
}
|
||||
echo "</rdf:Seq>" . PHP_EOL . "</items>" . PHP_EOL . "</channel>" . PHP_EOL;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Prints formatted feed items
|
||||
*/
|
||||
private function printItems(): void
|
||||
{
|
||||
foreach ($this->items as $item)
|
||||
{
|
||||
$thisItems = $item->getElements();
|
||||
|
||||
// The argument is printed as rdf:about attribute of item in RSS 1.0
|
||||
echo $this->startItem($thisItems['link']['content']);
|
||||
|
||||
foreach ($thisItems as $feedItem)
|
||||
{
|
||||
echo $this->makeNode($feedItem['name'], $feedItem['content'], $feedItem['attributes']);
|
||||
}
|
||||
echo $this->endItem();
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Makes the starting tag of items
|
||||
*
|
||||
* @param string|false $about The value of about tag, which is used only for RSS 1.0
|
||||
*/
|
||||
private function startItem($about = false): void
|
||||
{
|
||||
if ($this->version == RSS2)
|
||||
{
|
||||
echo '<item>' . PHP_EOL;
|
||||
}
|
||||
elseif ($this->version == RSS1)
|
||||
{
|
||||
if ($about)
|
||||
{
|
||||
echo "<item rdf:about=\"$about\">" . PHP_EOL;
|
||||
}
|
||||
else
|
||||
{
|
||||
die("link element is not set.\n It's required for RSS 1.0 to be used as the about attribute of the item");
|
||||
}
|
||||
}
|
||||
elseif ($this->version == ATOM)
|
||||
{
|
||||
echo "<entry>" . PHP_EOL;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Closes the feed item tag
|
||||
*/
|
||||
private function endItem(): void
|
||||
{
|
||||
if ($this->version == RSS2 || $this->version == RSS1)
|
||||
{
|
||||
echo '</item>' . PHP_EOL;
|
||||
}
|
||||
elseif ($this->version == ATOM)
|
||||
{
|
||||
echo "</entry>" . PHP_EOL;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Set the Feed URL
|
||||
* @param string $string - The URL of the feed
|
||||
* @return void
|
||||
*/
|
||||
public function setFeedURL(string $string): void
|
||||
{
|
||||
$this->setChannelElement("feedUrl", $string);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
// Define constants for RSS 1.0, RSS 2.0, and Atom
|
||||
const RSS1 = 'RSS 1.0';
|
||||
const RSS2 = 'RSS 2.0';
|
||||
const ATOM = 'ATOM';
|
||||
Reference in New Issue
Block a user