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Diffstat (limited to 'engine/lib/objects.php')
| -rw-r--r-- | engine/lib/objects.php | 264 |
1 files changed, 264 insertions, 0 deletions
diff --git a/engine/lib/objects.php b/engine/lib/objects.php new file mode 100644 index 000000000..900ea3f81 --- /dev/null +++ b/engine/lib/objects.php @@ -0,0 +1,264 @@ +<?php
+
+ /**
+ * Elgg objects
+ * Functions to manage multiple or single objects in an Elgg install
+ *
+ * @package Elgg
+ * @subpackage Core
+ * @license http://www.gnu.org/licenses/old-licenses/gpl-2.0.html GNU Public License version 2
+ * @author Curverider Ltd
+ * @copyright Curverider Ltd 2008
+ * @link http://elgg.org/
+ */
+
+ /**
+ * @class ElggObject
+ * Representation of an "object" in the system.
+ */
+ class ElggObject extends ElggEntity
+ {
+ /**
+ * Initialise the attributes array.
+ * This is vital to distinguish between metadata and base parameters.
+ *
+ * Place your base parameters here.
+ */
+ protected function initialise_attributes()
+ {
+ parent::initialise_attributes();
+
+ $this->attributes['type'] = "object";
+ $this->attributes['title'] = "";
+ $this->attributes['description'] = "";
+
+
+ }
+
+ /**
+ * Construct a new object entity, optionally from a given id value.
+ *
+ * @param mixed $guid If an int, load that GUID.
+ * If a db row then will attempt to load the rest of the data.
+ * @throws Exception if there was a problem creating the object.
+ */
+ function __construct($guid = null)
+ {
+ $this->initialise_attributes();
+
+ if (!empty($guid))
+ {
+ // Is $guid is a DB row - either a entity row, or a object table row.
+ if ($guid instanceof stdClass) {
+ // Load the rest
+ $this->load($guid->guid);
+ }
+
+ // Is $guid is an ElggObject? Use a copy constructor
+ else if ($guid instanceof ElggObject)
+ {
+ foreach ($guid->attributes as $key => $value)
+ $this->attributes[$key] = $value;
+ }
+
+ // Is this is an ElggEntity but not an ElggObject = ERROR!
+ else if ($guid instanceof ElggEntity)
+ throw new InvalidParameterException("Passing a non-ElggObject to an ElggObject constructor!");
+
+ // We assume if we have got this far, $guid is an int
+ else if (is_int($guid)) {
+ if (!$this->load($guid)) throw new IOException("Could not create a new ElggObject object from GUID:$guid");
+ }
+ }
+ }
+
+ function __get($name) { return $this->get($name); }
+ function __set($name, $value) { return $this->set($name, $value); }
+
+ /**
+ * Override the load function.
+ * This function will ensure that all data is loaded (were possible), so
+ * if only part of the ElggObject is loaded, it'll load the rest.
+ *
+ * @param int $guid
+ * @return true|false
+ */
+ protected function load($guid)
+ {
+ // Test to see if we have the generic stuff
+ if (!parent::load($guid))
+ return false;
+
+ // Check the type
+ if ($this->attributes['type']!='object')
+ throw new InvalidClassException("GUID:$guid is not a valid ElggObject");
+
+ // Load missing data
+ $row = get_object_entity_as_row($guid);
+
+ // Now put these into the attributes array as core values
+ $objarray = (array) $row;
+ foreach($objarray as $key => $value)
+ $this->attributes[$key] = $value;
+
+ return true;
+ }
+
+ /**
+ * Override the save function.
+ * @return true|false
+ */
+ public function save()
+ {
+ // Save generic stuff
+ if (!parent::save())
+ return false;
+
+ // Now save specific stuff
+ return create_object_entity($this->get('guid'), $this->get('title'), $this->get('description'));
+ }
+
+ /**
+ * Delete this object.
+ * @return true|false
+ */
+ public function delete()
+ {
+ if (!parent::delete())
+ return false;
+
+ return delete_object_entity($guid);
+ }
+
+ /**
+ * Get the object's owner
+ *
+ * @return ElggUser The owner user
+ */
+ function getOwner() {
+ return new ElggUser($this->owner_guid);
+ }
+
+ /**
+ * Get sites that this object is a member of
+ *
+ * @param string $subtype Optionally, the subtype of result we want to limit to
+ * @param int $limit The number of results to return
+ * @param int $offset Any indexing offset
+ */
+ function getSites($subtype="", $limit = 10, $offset = 0) {
+ return get_site_objects($this->getGUID(), $subtype, $limit, $offset);
+ }
+
+ /**
+ * Add this object to a particular site
+ *
+ * @param int $site_guid The guid of the site to add it to
+ * @return true|false
+ */
+ function add_to_site($site_guid) {
+ return add_site_object($this->getGUID(), $site_guid);
+ }
+
+ /**
+ * Get the collections associated with a object.
+ *
+ * @param string $subtype Optionally, the subtype of result we want to limit to
+ * @param int $limit The number of results to return
+ * @param int $offset Any indexing offset
+ * @return unknown
+ */
+ public function getCollections($subtype="", $limit = 10, $offset = 0) { get_object_collections($this->getGUID(), $subtype, $limit, $offset); }
+
+ }
+
+ /**
+ * Return the object specific details of a object by a row.
+ *
+ * @param int $guid
+ */
+ function get_object_entity_as_row($guid)
+ {
+ global $CONFIG;
+
+ $guid = (int)$guid;
+
+ return get_data_row("SELECT * from {$CONFIG->dbprefix}objects_entity where guid=$guid");
+ }
+
+ /**
+ * Create or update the extras table for a given object.
+ * Call create_entity first.
+ *
+ * @param int $guid
+ * @param string $name
+ * @param string $description
+ * @param string $url
+ */
+ function create_object_entity($guid, $name, $description, $url)
+ {
+ global $CONFIG;
+
+ $guid = (int)$guid;
+ $name = sanitise_string($name);
+ $description = sanitise_string($description);
+ $url = sanitise_string($url);
+
+ $row = get_entity_as_row($guid);
+
+ if ($row)
+ {
+ // Exists and you have access to it
+
+ // Delete any existing stuff
+ delete_object_entity($guid);
+
+ // Insert it
+ $result = insert_data("INSERT into {$CONFIG->dbprefix}objects_entity (guid, name, description, url) values ($guid, '$name','$description','$url')");
+ if ($result!==false)
+ return true;
+ }
+
+ return false;
+ }
+
+ /**
+ * Delete a object's extra data.
+ *
+ * @param int $guid
+ */
+ function delete_object_entity($guid)
+ {
+ global $CONFIG;
+
+ $guid = (int)$guid;
+
+ $row = get_entity_as_row($guid);
+
+ // Check to see if we have access and it exists
+ if ($row)
+ {
+ // Delete any existing stuff
+ return delete_data("DELETE from {$CONFIG->dbprefix}objects_entity where guid=$guid");
+ }
+
+ return false;
+ }
+
+ /**
+ * Get the sites this object is part of
+ *
+ * @param int $object_guid The object's GUID
+ * @param int $limit Number of results to return
+ * @param int $offset Any indexing offset
+ * @return false|array On success, an array of ElggSites
+ */
+ function get_object_sites($object_guid, $limit = 10, $offset = 0) {
+ $object_guid = (int)$object_guid;
+ $limit = (int)$limit;
+ $offset = (int)$offset;
+
+ return get_entities_from_relationship("member_of_site", $object_guid, false, "site", "", 0, "time_created desc", $limit, $offset);
+ }
+
+?>
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