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-rw-r--r--engine/lib/relationships.php76
1 files changed, 74 insertions, 2 deletions
diff --git a/engine/lib/relationships.php b/engine/lib/relationships.php
index 592e3ecea..c1d2af71f 100644
--- a/engine/lib/relationships.php
+++ b/engine/lib/relationships.php
@@ -18,7 +18,11 @@
* @package Elgg
* @subpackage Core
*/
- class ElggRelationship implements Importable, Exportable
+ class ElggRelationship implements
+ Importable,
+ Exportable,
+ Iterator, // Override foreach behaviour
+ ArrayAccess // Override for array access
{
/**
* This contains the site's main properties (id, etc)
@@ -103,7 +107,8 @@
return delete_relationship($this->id);
}
-
+ // EXPORTABLE INTERFACE ////////////////////////////////////////////////////////////
+
/**
* Export this relationship
*
@@ -122,6 +127,8 @@
);
}
+ // IMPORTABLE INTERFACE ////////////////////////////////////////////////////////////
+
/**
* Import a relationship
*
@@ -163,6 +170,71 @@
}
}
}
+
+ // 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->attributes));
+ }
+
+ function current()
+ {
+ return current($this->attributes);
+ }
+
+ function key()
+ {
+ return key($this->attributes);
+ }
+
+ function next()
+ {
+ $this->valid = (FALSE !== next($this->attributes));
+ }
+
+ function valid()
+ {
+ return $this->valid;
+ }
+
+ // ARRAY ACCESS INTERFACE //////////////////////////////////////////////////////////
+ /*
+ * This lets an entity's attributes be accessed like an associative array.
+ * Example: http://www.sitepoint.com/print/php5-standard-library
+ */
+
+ function offsetSet($key, $value)
+ {
+ if ( array_key_exists($key, $this->attributes) ) {
+ $this->attributes[$key] = $value;
+ }
+ }
+
+ function offsetGet($key)
+ {
+ if ( array_key_exists($key, $this->attributes) ) {
+ return $this->attributes[$key];
+ }
+ }
+
+ function offsetUnset($key)
+ {
+ if ( array_key_exists($key, $this->attributes) ) {
+ $this->attributes[$key] = ""; // Full unsetting is dangerious for our objects
+ }
+ }
+
+ function offsetExists($offset)
+ {
+ return array_key_exists($offset, $this->attributes);
+ }
}