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<?php
/**
* Class Tribe__Data
*
* A value object implementing the ArrayAccess interface.
*
* Example usage:
* $my_data = array( 'lorem' => 'dolor' );
*
* // by default return 'nope' when a value is not set in the data
* $data = new Tribe__Data( $my_data, 'nope' );
*
* // set some values in the data
* $data['foo'] = 'bar';
* $data['bar'] = 23;
*
* // fetch some values
* $var_1 = $data['foo']; // "bar"
* $var_2 = $data['bar']; // 23
* $var_3 = $data['lorem']; // "dolor"
* $var_4 = $data['woo']; // "nope"
*
* $data->set_default( 'not found' );
*
* $var_4 = $data['woo']; // "not found"
*
*/
class Tribe__Data implements ArrayAccess, Iterator {
/**
* @var int
*/
protected $index = 0;
/**
* @var array The data managed by this object.
*/
protected $data;
/**
* @var mixed The default value that will be returned when trying to get the value
* of a non set key.
*/
protected $default;
/**
* Tribe__Data constructor.
*
* @param array|object $data An array or object of data.
* @param mixed $default The default value that should be returned if a key is not set
*/
public function __construct( $data = [], $default = false ) {
$this->data = (array) $data;
$this->default = $default;
}
/**
* Whether a offset exists
*
* @link http://php.net/manual/en/arrayaccess.offsetexists.php
* @param mixed $offset <p>
* An offset to check for.
* </p>
* @return boolean true on success or false on failure.
* </p>
* <p>
* The return value will be casted to boolean if non-boolean was returned.
* @since 4.11.0
*/
public function offsetExists( $offset ) {
return isset( $this->data[ $offset ] );
}
/**
* Offset to retrieve
*
* @link http://php.net/manual/en/arrayaccess.offsetget.php
* @param mixed $offset <p>
* The offset to retrieve.
* </p>
* @return mixed Can return all value types.
* @since 4.11.0
*/
public function offsetGet( $offset ) {
return isset( $this->data[ $offset ] )
? $this->data[ $offset ]
: $this->default;
}
/**
* Offset to set
*
* @link http://php.net/manual/en/arrayaccess.offsetset.php
* @param mixed $offset <p>
* The offset to assign the value to.
* </p>
* @param mixed $value <p>
* The value to set.
* </p>
* @return void
* @since 4.11.0
*/
public function offsetSet( $offset, $value ) {
$this->data[ $offset ] = $value;
}
/**
* Offset to unset
*
* @link http://php.net/manual/en/arrayaccess.offsetunset.php
* @param mixed $offset <p>
* The offset to unset.
* </p>
* @return void
* @since 4.11.0
*/
public function offsetUnset( $offset ) {
unset( $this->data[ $offset ] );
}
/**
* Gets the data this object manages.
*
* @return array
*/
public function get_data() {
return $this->data;
}
/**
* Sets the data this object will manage.
*
* @param array $data
*/
public function set_data( array $data ) {
$this->data = $data;
}
/**
* Gets the default value that will be returned when a key is not set.
*
* @return mixed
*/
public function get_default() {
return $this->default;
}
/**
* Sets the default value that should be returned when a key is not set.
*
* @param mixed $default
*/
public function set_default( $default ) {
$this->default = $default;
}
/**
* Return the current element
*
* @link http://php.net/manual/en/iterator.current.php
* @return mixed Can return any type.
* @since 4.11.0
*/
public function current() {
$keys = array_keys( $this->data );
return $this->data[ $keys[ $this->index ] ];
}
/**
* Move forward to next element
*
* @link http://php.net/manual/en/iterator.next.php
* @return void Any returned value is ignored.
* @since 4.11.0
*/
public function next() {
$keys = array_keys( $this->data );
if ( isset( $keys[ ++ $this->index ] ) ) {
return $this->data[ $keys[ $this->index ] ];
}
return false;
}
/**
* Return the key of the current element
*
* @link http://php.net/manual/en/iterator.key.php
* @return mixed scalar on success, or null on failure.
* @since 4.11.0
*/
public function key() {
$keys = array_keys( $this->data );
return $keys[ $this->index ];
}
/**
* Checks if current position is valid
*
* @link http://php.net/manual/en/iterator.valid.php
* @return boolean The return value will be casted to boolean and then evaluated.
* Returns true on success or false on failure.
* @since 4.11.0
*/
public function valid() {
$keys = array_keys( $this->data );
return isset( $keys[ $this->index ] );
}
/**
* Rewind the Iterator to the first element
*
* @link http://php.net/manual/en/iterator.rewind.php
* @return void Any returned value is ignored.
* @since 4.11.0
*/
public function rewind() {
$this->index = 0;
}
/**
* Converts the data object in an array.
*
* @return array
*
* @since 4.6
*/
public function to_array() {
return $this->get_data();
}
}
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