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-rw-r--r--engine/lib/export.php250
-rw-r--r--engine/lib/opendd.php306
2 files changed, 315 insertions, 241 deletions
diff --git a/engine/lib/export.php b/engine/lib/export.php
index aa7e7aa18..e389613e8 100644
--- a/engine/lib/export.php
+++ b/engine/lib/export.php
@@ -60,232 +60,7 @@
* @subpackage Exceptions
*/
class ImportException extends DataFormatException {}
-
- /**
- * @class ODDDocument ODD Document container.
- * This class is used during import and export to construct.
- * @author Marcus Povey
- */
- class ODDDocument
- {
- /**
- * ODD Version
- *
- * @var string
- */
- private $ODDSupportedVersion = "1.0";
-
- /**
- * Elements of the document.
- */
- private $elements;
-
- public function __construct(array $elements = NULL)
- {
- if ($elements)
- $this->elements = $elements;
- else
- $this->elements = array();
- }
-
- /**
- * Return the version of ODD being used.
- *
- * @return string
- */
- public function getVersion() { return $this->ODDSupportedVersion; }
-
- public function addElement(ODD $element) { $this->elements[] = $element; }
- public function addElements(array $elements)
- {
- foreach ($elements as $element)
- $this->addElement($element);
- }
- public function getElements() { return $this->elements; }
-
- /**
- * Magic function to generate valid ODD XML for this item.
- */
- public function __toString()
- {
- $xml = "";
-
- // Output begin tag
- $generated = date("r");
- $xml .= "<odd version=\"{$this->ODDSupportedVersion}\" generated=\"$generated\">\n";
-
- // Get XML for elements
- foreach ($this->elements as $element)
- $xml .= "$element";
-
- // Output end tag
- $xml .= "</odd>\n";
-
- return $xml;
- }
- }
-
-
- /**
- * Open Data Definition (ODD) superclass.
- * @package Elgg
- * @subpackage Core
- * @author Marcus Povey
- */
- abstract class ODD
- {
- /**
- * Attributes.
- */
- private $attributes = array();
-
- /**
- * Optional body.
- */
- private $body;
-
- /**
- * Construct an ODD document with initial values.
- */
- public function __construct()
- {
- $this->body = "";
- }
-
- public function setAttribute($key, $value) { $this->attributes[$key] = $value; }
- public function getAttribute($key)
- {
- if (isset($this->attributes[$key]))
- return $this->attributes[$key];
-
- return NULL;
- }
- public function setBody($value) { $this->body = $value; }
- public function getBody() { return $this->body; }
-
- /**
- * For serialisation, implement to return a string name of the tag eg "header" or "metadata".
- * @return string
- */
- abstract protected function getTagName();
-
- /**
- * Magic function to generate valid ODD XML for this item.
- */
- public function __toString()
- {
- // Construct attributes
- $attr = "";
- foreach ($this->attributes as $k => $v)
- $attr .= ($v!="") ? "$k=\"$v\" " : "";
-
- $body = $this->getBody();
- $tag = $this->getTagName();
-
- $end = "/>";
- if ($body!="")
- $end = ">$body</{$tag}>";
-
- return "<{$tag} $attr" . $end . "\n";
- }
- }
-
- /**
- * ODD Entity class.
- * @package Elgg
- * @subpackage Core
- * @author Marcus Povey
- */
- class ODDEntity extends ODD
- {
- function __construct($uuid, $class, $subclass = "")
- {
- parent::__construct();
-
- $this->setAttribute('uuid', $uuid);
- $this->setAttribute('class', $class);
- $this->setAttribute('subclass', $subclass);
- }
-
- protected function getTagName() { return "entity"; }
- }
-
- /**
- * ODD Metadata class.
- * @package Elgg
- * @subpackage Core
- * @author Marcus Povey
- */
- class ODDMetaData extends ODD
- {
- function __construct($uuid, $entity_uuid, $name, $value, $type = "", $owner_uuid = "")
- {
- parent::__construct();
-
- $this->setAttribute('uuid', $uuid);
- $this->setAttribute('entity_uuid', $entity_uuid);
- $this->setAttribute('name', $name);
- $this->setAttribute('type', $type);
- $this->setAttribute('owner_uuid', $owner_uuid);
- $this->setBody($value);
- }
-
- protected function getTagName() { return "metadata"; }
- }
-
- /**
- * ODD Relationship class.
- * @package Elgg
- * @subpackage Core
- * @author Marcus Povey
- */
- class ODDRelationship extends ODD
- {
- function __construct($uuid1, $type, $uuid2)
- {
- parent::__construct();
-
- $this->setAttribute('uuid1', $uuid1);
- $this->setAttribute('type', $type);
- $this->setAttribute('uuid2', $uuid2);
- }
-
- protected function getTagName() { return "relationship"; }
- }
-
- /**
- * Attempt to construct an ODD object out of a XmlElement or sub-elements.
- *
- * @param XmlElement $element The element(s)
- * @return mixed An ODD object if the element can be handled, or false.
- */
- function ODD_factory(XmlElement $element)
- {
- $name = $element->name;
- $odd = false;
-
- switch ($name)
- {
- case 'entity' : $odd = new ODDEntity("","",""); break;
- case 'metadata' : $odd = new ODDMetaData("","","",""); break;
- case 'relationship' : $odd = new ODDRelationship("","",""); break;
- }
-
- // Now populate values
- if ($odd)
- {
- // Attributes
- foreach ($element->attributes as $k => $v)
- $odd->setAttribute($k,$v);
-
- // Body
- $odd->setBody($element->content);
- }
-
- return $odd;
- }
-
/**
* Generate a UUID from a given GUID.
*
@@ -354,36 +129,26 @@
*
* If nobody processes the top level element, the sub level elements are processed.
*
- * @param array $element The dom tree.
+ * @param ODD $odd The odd element to process
*/
- function __process_element($element)
+ function __process_element(ODD $odd)
{
global $IMPORTED_DATA, $IMPORTED_OBJECT_COUNTER;
-
- // See if we can convert the element into an ODD element
- $odd = ODD_factory($element);
// See if anyone handles this element, return true if it is.
if ($odd)
$handled = trigger_plugin_hook("import", "all", array("element" => $odd), $to_be_serialised);
// If not, then see if any of its sub elements are handled
- if (!$handled)
- {
- // Issue a warning
- trigger_error("'<{$element->name}>' had no registered handler.", E_USER_WARNING);
-
- if (isset($element->children))
- foreach ($element->children as $c)
- __process_element($c);
- }
- else
+ if ($handled)
{
$IMPORTED_OBJECT_COUNTER ++; // Increment validation counter
$IMPORTED_DATA[] = $handled; // Return the constructed object
return true;
}
+
+ return false;
}
/**
@@ -431,7 +196,10 @@
$IMPORTED_DATA = array();
$IMPORTED_OBJECT_COUNTER = 0;
- __process_element(xml_2_object($xml));
+ $document = ODD_Import($xml);
+
+ foreach ($document as $element)
+ __process_element($element);
if ($IMPORTED_OBJECT_COUNTER!= count($IMPORTED_DATA))
throw new ImportException("Not all elements were imported.");
diff --git a/engine/lib/opendd.php b/engine/lib/opendd.php
new file mode 100644
index 000000000..0f4955448
--- /dev/null
+++ b/engine/lib/opendd.php
@@ -0,0 +1,306 @@
+<?php
+ /**
+ * OpenDD PHP Library.
+ *
+ * @package Elgg
+ * @subpackage Core
+ * @license http://www.gnu.org/licenses/old-licenses/gpl-2.0.html GNU Public License version 2
+ * @author Marcus Povey
+ * @copyright Curverider Ltd 2008
+ * @link http://elgg.org/
+ */
+
+ /**
+ * @class ODDDocument ODD Document container.
+ * This class is used during import and export to construct.
+ * @author Marcus Povey
+ */
+ class ODDDocument implements Iterator
+ {
+ /**
+ * ODD Version
+ *
+ * @var string
+ */
+ private $ODDSupportedVersion = "1.0";
+
+ /**
+ * Elements of the document.
+ */
+ private $elements;
+
+ public function __construct(array $elements = NULL)
+ {
+ if ($elements)
+ $this->elements = $elements;
+ else
+ $this->elements = array();
+ }
+
+ /**
+ * Return the version of ODD being used.
+ *
+ * @return string
+ */
+ public function getVersion() { return $this->ODDSupportedVersion; }
+
+ public function addElement(ODD $element) { $this->elements[] = $element; }
+ public function addElements(array $elements)
+ {
+ foreach ($elements as $element)
+ $this->addElement($element);
+ }
+
+ public function getElements() { return $this->elements; }
+
+ /**
+ * Magic function to generate valid ODD XML for this item.
+ */
+ public function __toString()
+ {
+ $xml = "";
+
+ // Output begin tag
+ $generated = date("r");
+ $xml .= "<odd version=\"{$this->ODDSupportedVersion}\" generated=\"$generated\">\n";
+
+ // Get XML for elements
+ foreach ($this->elements as $element)
+ $xml .= "$element";
+
+ // Output end tag
+ $xml .= "</odd>\n";
+
+ return $xml;
+ }
+
+ // ITERATOR INTERFACE //////////////////////////////////////////////////////////////
+ /*
+ * This lets an entity's attributes be displayed using foreach as a normal array.
+ * Example: http://www.sitepoint.com/print/php5-standard-library
+ */
+
+ private $valid = FALSE;
+
+ function rewind()
+ {
+ $this->valid = (FALSE !== reset($this->elements));
+ }
+
+ function current()
+ {
+ return current($this->elements);
+ }
+
+ function key()
+ {
+ return key($this->elements);
+ }
+
+ function next()
+ {
+ $this->valid = (FALSE !== next($this->elements));
+ }
+
+ function valid()
+ {
+ return $this->valid;
+ }
+ }
+
+ /**
+ * Open Data Definition (ODD) superclass.
+ * @package Elgg
+ * @subpackage Core
+ * @author Marcus Povey
+ */
+ abstract class ODD
+ {
+ /**
+ * Attributes.
+ */
+ private $attributes = array();
+
+ /**
+ * Optional body.
+ */
+ private $body;
+
+ /**
+ * Construct an ODD document with initial values.
+ */
+ public function __construct()
+ {
+ $this->body = "";
+ }
+
+ public function setAttribute($key, $value) { $this->attributes[$key] = $value; }
+ public function getAttribute($key)
+ {
+ if (isset($this->attributes[$key]))
+ return $this->attributes[$key];
+
+ return NULL;
+ }
+ public function setBody($value) { $this->body = $value; }
+ public function getBody() { return $this->body; }
+
+ /**
+ * For serialisation, implement to return a string name of the tag eg "header" or "metadata".
+ * @return string
+ */
+ abstract protected function getTagName();
+
+ /**
+ * Magic function to generate valid ODD XML for this item.
+ */
+ public function __toString()
+ {
+ // Construct attributes
+ $attr = "";
+ foreach ($this->attributes as $k => $v)
+ $attr .= ($v!="") ? "$k=\"$v\" " : "";
+
+ $body = $this->getBody();
+ $tag = $this->getTagName();
+
+ $end = "/>";
+ if ($body!="")
+ $end = ">$body</{$tag}>";
+
+ return "<{$tag} $attr" . $end . "\n";
+ }
+ }
+
+ /**
+ * ODD Entity class.
+ * @package Elgg
+ * @subpackage Core
+ * @author Marcus Povey
+ */
+ class ODDEntity extends ODD
+ {
+ function __construct($uuid, $class, $subclass = "")
+ {
+ parent::__construct();
+
+ $this->setAttribute('uuid', $uuid);
+ $this->setAttribute('class', $class);
+ $this->setAttribute('subclass', $subclass);
+ }
+
+ protected function getTagName() { return "entity"; }
+ }
+
+ /**
+ * ODD Metadata class.
+ * @package Elgg
+ * @subpackage Core
+ * @author Marcus Povey
+ */
+ class ODDMetaData extends ODD
+ {
+ function __construct($uuid, $entity_uuid, $name, $value, $type = "", $owner_uuid = "")
+ {
+ parent::__construct();
+
+ $this->setAttribute('uuid', $uuid);
+ $this->setAttribute('entity_uuid', $entity_uuid);
+ $this->setAttribute('name', $name);
+ $this->setAttribute('type', $type);
+ $this->setAttribute('owner_uuid', $owner_uuid);
+ $this->setBody($value);
+ }
+
+ protected function getTagName() { return "metadata"; }
+ }
+
+ /**
+ * ODD Relationship class.
+ * @package Elgg
+ * @subpackage Core
+ * @author Marcus Povey
+ */
+ class ODDRelationship extends ODD
+ {
+ function __construct($uuid1, $type, $uuid2)
+ {
+ parent::__construct();
+
+ $this->setAttribute('uuid1', $uuid1);
+ $this->setAttribute('type', $type);
+ $this->setAttribute('uuid2', $uuid2);
+ }
+
+ protected function getTagName() { return "relationship"; }
+ }
+
+ /**
+ * Attempt to construct an ODD object out of a XmlElement or sub-elements.
+ *
+ * @param XmlElement $element The element(s)
+ * @return mixed An ODD object if the element can be handled, or false.
+ */
+ function ODD_factory(XmlElement $element)
+ {
+ $name = $element->name;
+ $odd = false;
+
+ switch ($name)
+ {
+ case 'entity' : $odd = new ODDEntity("","",""); break;
+ case 'metadata' : $odd = new ODDMetaData("","","",""); break;
+ case 'relationship' : $odd = new ODDRelationship("","",""); break;
+ }
+
+ // Now populate values
+ if ($odd)
+ {
+ // Attributes
+ foreach ($element->attributes as $k => $v)
+ $odd->setAttribute($k,$v);
+
+ // Body
+ $odd->setBody($element->content);
+ }
+
+ return $odd;
+ }
+
+ /**
+ * Import an ODD document.
+ *
+ * @param string $xml The XML ODD.
+ * @return ODDDocument
+ */
+ function ODD_Import($xml)
+ {
+ // Parse XML to an array
+ $elements = xml_2_object($xml);
+
+ // Create ODDDocument
+ $document = new ODDDocument();
+
+ // Itterate through array of elements and construct ODD document
+ foreach ($elements->children as $child)
+ {
+ $odd = ODD_factory($child);
+
+ if ($odd)
+ $document->addElement($odd);
+ }
+
+ return $document;
+ }
+
+ /**
+ * Export an ODD Document.
+ *
+ * @param ODDDocument $document The Document.
+ */
+ function ODD_Export(ODDDocument $document)
+ {
+ return "$document";
+ }
+
+?> \ No newline at end of file
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