diff options
Diffstat (limited to 'engine/lib/extender.php')
| -rw-r--r-- | engine/lib/extender.php | 72 |
1 files changed, 71 insertions, 1 deletions
diff --git a/engine/lib/extender.php b/engine/lib/extender.php index 9762526aa..e1d42efd6 100644 --- a/engine/lib/extender.php +++ b/engine/lib/extender.php @@ -18,7 +18,10 @@ * @package Elgg * @subpackage Core */ - abstract class ElggExtender implements Exportable + abstract class ElggExtender implements + Exportable, + Iterator, // Override foreach behaviour + ArrayAccess // Override for array access { /** * This contains the site's main properties (id, etc) @@ -100,6 +103,8 @@ return can_edit_extender($this->id,$this->type,$user_guid);
} + // EXPORTABLE INTERFACE //////////////////////////////////////////////////////////// + /** * Export this object * @@ -115,6 +120,71 @@ return $meta; } + + // 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); + } } /** |