# Class AlphaFeed

Base feed class for generating syndication feeds

#### Direct known subclasses

Atom, RSS, RSS2
Abstract
Package: alpha::util::feeds
Copyright: Copyright (c) 2012, John Collins (founder of Alpha Framework). All rights reserved.

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License: The BSD License
Author: John Collins <dev@alphaframework.org>
Version: $Id: AlphaFeed.inc 1496 2012-02-12 20:32:21Z alphadev $
Since: 1.0
Located at util/feeds/AlphaFeed.inc

Methods summary
`public` | # `__construct( string $BOName, string $title, string $url, string $description, string $pubDate = null, integer $id = null, integer $limit = 10 )` The constructor The constructor #### Parameters $BOName `string` $BOName The classname of the BO to render a feed for. $title `string` $title The title of the feed. $url `string` $url The base URL for the feed. $description `string` $description The description of the feed. $pubDate `string` $pubDate The publish date, only used in Atom feeds. $id `integer` $id The feed id, only used in Atom feeds. $limit `integer` $limit The amount of items to render in the feed. #### Throws ``IllegalArguementException`` #### Since 1.0
`public` | # `loadBOs( integer $limit, string $sortBy )` Method to load all of the BO items to the feed from the database, from the newest to the $limit provided Method to load all of the BO items to the feed from the database, from the newest to the $limit provided #### Parameters $limit `integer` $limit The amount of items to render in the feed. $sortBy `string` $sortBy The name of the field to sort the feed by. #### Since 1.0
`public` | # `addBO( `AlphaDAO` $BO )` Method for adding a BO to the current feed Method for adding a BO to the current feed #### Parameters $BO ``AlphaDAO`` $BO
`public` | # `setFieldMappings( string $title, string $url, string $description = null, string $pubDate = null, integer $id = null )` Method for mapping BO fieldnames to feed field names Method for mapping BO fieldnames to feed field names #### Parameters $title `string` $title The title of the feed. $url `string` $url The base URL for the feed. $description `string` $description The description of the feed. $pubDate `string` $pubDate The publish date, only used in Atom feeds. $id `integer` $id The feed id, only used in Atom feeds. #### Since 1.0
`protected DOMElement` | # `createFeedElement( string $name, string $value = null )` Method for creating a new feed element Method for creating a new feed element #### Parameters $name `string` $name The name of the element. $value `string` $value The value of the element. #### Returns `DOMElement` #### Since 1.0
`protected` | # `createLink( DOMElement $parent, string $url )` Method for creating link elements (note that Atom has a different format) Method for creating link elements (note that Atom has a different format) #### Parameters $parent `DOMElement` $parent The parent element. $url `string` $url The URL for the link. #### Since 1.0
`protected` | # `createRSSNode( integer $type, DOMElement $parent, string $title, string $url, string $description, string $pubDate = null, integer $id = null )` Method for creating an RSS node with a title, url and description Method for creating an RSS node with a title, url and description #### Parameters $type `integer` $type Can be either (item|feed) to indicate the type of node we are creating. $parent `DOMElement` $parent The parent element. $title `string` $title The title of the feed. $url `string` $url The base URL for the feed. $description `string` $description The description of the feed. $pubDate `string` $pubDate The publish date, only used in Atom feeds. $id `integer` $id The feed id, only used in Atom feeds. #### Throws ``IllegalArguementException`` #### Since 1.0
`protected` | # `addItem( string $title, string $url, string $description = null, string $pubDate = null, integer $id = null )` Method for adding an item to a feed Method for adding an item to a feed #### Parameters $title `string` $title The title of the feed. $url `string` $url The base URL for the feed. $description `string` $description The description of the feed. $pubDate `string` $pubDate The publish date, only used in Atom feeds. $id `integer` $id The feed id, only used in Atom feeds. #### Since 1.0
`public string` | # `render( )` Returns the formatted XML for the feed as a string Returns the formatted XML for the feed as a string #### Returns `string` #### Since 1.0

Properties summary
`protected DOMDocument` | $rssDoc | `` | # The DOMDocument object used to create the feed The DOMDocument object used to create the feed #### Since 1.0
`protected DOMElement` | $docElement | `` | # The DOMElement object used to hold the item or entry elements The DOMElement object used to hold the item or entry elements #### Since 1.0
`protected DOMElement` | $root | `` | # Holds the DOMElement to which metadata is added for the feed Holds the DOMElement to which metadata is added for the feed #### Since 1.0
`protected string` | $rootTag | `` | # The actual root tag used in each feed type The actual root tag used in each feed type #### Since 1.0
`protected array` | $items | `` | # An array of feed items An array of feed items #### Since 1.0
`protected boolean` | $hasChannel | `true` | # If the feed format has a channel or not If the feed format has a channel or not #### Since 1.0
`protected array` | $tagMap | `array('item'=>'item','feeddesc'=>'description','itemdesc'=>'description')` | # Maps the tags to the feed-specific tags Maps the tags to the feed-specific tags #### Since 1.0
`private `AlphaDAO`` | $BO | `` | # The BO which we will serve up in this feed The BO which we will serve up in this feed #### Since 1.0
`protected array` | $fieldNameMappings | `` | # An array containing BO field names -> RSS field name mappings An array containing BO field names -> RSS field name mappings #### Since 1.0
`protected string` | $nameSpace | `` | # The XML namespace to use in the generated feed The XML namespace to use in the generated feed
`private static `Logger`` | $logger | `null` | # Trace logger Trace logger #### Since 1.0