From 60284479936d65443bd5dc14456bc0b692eab500 Mon Sep 17 00:00:00 2001
From: Jozef Selesi <jozefs@users.sourceforge.net>
Date: Sat, 22 Nov 2008 18:22:53 +0000
Subject: An Atom library prototype. Its purpose is to explore the cost of us
 supporting Atom as the default input and output format of RESTful
 controllers. Only the constructs necessary for representing comment feeds and
 entries have been implemented. Its output are valid Atom 1.0 documents. The
 test contains examples of how to make feeds and entries.

---
 modules/atom/libraries/Atom_Base.php | 74 ++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 modules/atom/libraries/Atom_Base.php

(limited to 'modules/atom/libraries/Atom_Base.php')

diff --git a/modules/atom/libraries/Atom_Base.php b/modules/atom/libraries/Atom_Base.php
new file mode 100644
index 00000000..62fdfea1
--- /dev/null
+++ b/modules/atom/libraries/Atom_Base.php
@@ -0,0 +1,74 @@
+<?php defined("SYSPATH") or die("No direct script access.");
+/**
+ * Gallery - a web based photo album viewer and editor
+ * Copyright (C) 2000-2008 Bharat Mediratta
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+class Atom_Base_Core {
+  protected $dom;
+  protected $element;
+  protected $children = array();
+  protected $element_name;
+
+  function __construct($element_name, $dom=null) {
+    if ($dom) {
+      $this->dom = $dom;
+      $this->element = $dom->createElement($element_name);
+    } else {
+      $this->dom = new DOMDocument('1.0', 'utf-8');
+      $this->element = $this->dom->createElementNS("http://www.w3.org/2005/Atom", $element_name);
+    }
+    $this->dom->appendChild($this->element);
+    $this->element_name = $element_name;
+    return $this;
+  }
+
+  public function get_element() {
+    $this->add_children_to_base_element();
+    return $this->element;
+  }
+
+  public function as_xml() {
+    $this->add_children_to_base_element();
+    return $this->dom->saveXML();
+  }
+
+  public function as_json() {
+    $this->add_children_to_base_element();
+    /* Both Google and Yahoo generate their JSON from XML. We could do that, too. */
+    return null;
+  }
+
+  public function load_xml($xml) {
+    /* Load XML into our DOM. We can also validate against the RELAX NG schema from the Atom RFC. */
+  }
+
+  protected function add_child($element_type, $element_name) {
+    // @todo check if element_type is of Atom_Base; this can also be done with no magic
+    $element = new $element_type($element_name, $this->dom);
+    $this->children[$element_name][] = $element;
+    return end($this->children[$element_name]);
+  }
+
+  protected function add_children_to_base_element() {
+    foreach ($this->children as $element_type => $elements) {
+      $base_element = $this->dom->getElementsByTagName($this->element_name)->item(0);
+      foreach ($elements as $id => $element) {
+        $base_element->appendChild($element->get_element());
+      }
+    }
+  }
+}
\ No newline at end of file
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