<?php
/**
 * LICENSE
 *
 * This file is part of CFPropertyList.
 *
 * The PHP implementation of Apple's PropertyList can handle XML PropertyLists
 * as well as binary PropertyLists. It offers functionality to easily convert
 * data between worlds, e.g. recalculating timestamps from unix epoch to apple
 * epoch and vice versa. A feature to automagically create (guess) the plist
 * structure from a normal PHP data structure will help you dump your data to
 * plist in no time.
 *
 * Copyright (c) 2018 Teclib'
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * ------------------------------------------------------------------------------
 * @author    Rodney Rehm <rodney.rehm@medialize.de>
 * @author    Christian Kruse <cjk@wwwtech.de>
 * @copyright Copyright © 2018 Teclib
 * @package   plist
 * @license   MIT
 * @link      https://github.com/TECLIB/CFPropertyList/
 * @link      http://developer.apple.com/documentation/Darwin/Reference/ManPages/man5/plist.5.html Property Lists
 * ------------------------------------------------------------------------------
 */

namespace CFPropertyList;

use \DOMDocument;
use \Iterator;
use \ArrayAccess;

/**
 * Array Type of CFPropertyList
 */
class CFDictionary extends CFType implements Iterator
{
   /**
    * Position of iterator {@link http://php.net/manual/en/class.iterator.php}
    * @var integer
    */
    protected $iteratorPosition = 0;
   /**
    * List of Keys for numerical iterator access {@link http://php.net/manual/en/class.iterator.php}
    * @var array
    */
    protected $iteratorKeys = null;
   /**
    * Create new CFType.
    * @param array $value Value of CFType
    */
    public function __construct($value = array())
    {
        $this->value = $value;
    }
   /**
    * Set the CFType's value
    * <b>Note:</b> this dummy does nothing
    * @return void
    */
    public function setValue($value)
    {
    }
   /**
    * Add CFType to collection.
    * @param string $key Key to add to collection
    * @param CFType $value CFType to add to collection, defaults to null which results in an empty {@link CFString}
    * @return void
    * @uses $value for adding $key $value pair
    */
    public function add($key, CFType $value = null)
    {
      // anything but CFType is null, null is an empty string - sad but true
        if (!$value) {
            $value = new CFString();
        }
        $this->value[$key] = $value;
    }
   /**
    * Get CFType from collection.
    * @param string $key Key of CFType to retrieve from collection
    * @return CFType CFType found at $key, null else
    * @uses $value for retrieving CFType of $key
    */
    public function get($key)
    {
        if (isset($this->value[$key])) {
            return $this->value[$key];
        }
        return null;
    }
   /**
    * Generic getter (magic)
    * @param integer $key Key of CFType to retrieve from collection
    * @return CFType CFType found at $key, null else
    * @link http://php.net/oop5.overloading
    * @uses get() to retrieve the key's value
    * @author Sean Coates <sean@php.net>
    */
    public function __get($key)
    {
        return $this->get($key);
    }
   /**
    * Remove CFType from collection.
    * @param string $key Key of CFType to removes from collection
    * @return CFType removed CFType, null else
    * @uses $value for removing CFType of $key
    */
    public function del($key)
    {
        if (isset($this->value[$key])) {
            unset($this->value[$key]);
        }
    }
   /************************************************************************************************
    *    S E R I A L I Z I N G
    ************************************************************************************************/
   /**
    * Get XML-Node.
    * @param DOMDocument $doc DOMDocument to create DOMNode in
    * @param string $nodeName For compatibility reasons; just ignore it
    * @return DOMNode &lt;dict&gt;-Element
    */
    public function toXML(DOMDocument $doc, $nodeName = "")
    {
        $node = $doc->createElement('dict');
        foreach ($this->value as $key => $value) {
            $node->appendChild($doc->createElement('key', $key));
            $node->appendChild($value->toXML($doc));
        }
        return $node;
    }
   /**
    * convert value to binary representation
    * @param CFBinaryPropertyList The binary property list object
    * @return The offset in the object table
    */
    public function toBinary(CFBinaryPropertyList &$bplist)
    {
        return $bplist->dictToBinary($this);
    }
   /**
    * Get CFType's value.
    * @return array primitive value
    * @uses $value for retrieving primitive of CFType
    */
    public function toArray()
    {
        $a = array();
        foreach ($this->value as $key => $value) {
            $a[$key] = $value->toArray();
        }
        return $a;
    }
   /************************************************************************************************
    *    I T E R A T O R   I N T E R F A C E
    ************************************************************************************************/
   /**
    * Rewind {@link $iteratorPosition} to first position (being 0)
    * @link http://php.net/manual/en/iterator.rewind.php
    * @return void
    * @uses $iteratorPosition set to 0
    * @uses $iteratorKeys store keys of {@link $value}
    */
    public function rewind()
    {
        $this->iteratorPosition = 0;
        $this->iteratorKeys = array_keys($this->value);
    }
   /**
    * Get Iterator's current {@link CFType} identified by {@link $iteratorPosition}
    * @link http://php.net/manual/en/iterator.current.php
    * @return CFType current Item
    * @uses $iteratorPosition identify current key
    * @uses $iteratorKeys identify current value
    */
    public function current()
    {
        return $this->value[$this->iteratorKeys[$this->iteratorPosition]];
    }
   /**
    * Get Iterator's current key identified by {@link $iteratorPosition}
    * @link http://php.net/manual/en/iterator.key.php
    * @return string key of the current Item
    * @uses $iteratorPosition identify current key
    * @uses $iteratorKeys identify current value
    */
    public function key()
    {
        return $this->iteratorKeys[$this->iteratorPosition];
    }
   /**
    * Increment {@link $iteratorPosition} to address next {@see CFType}
    * @link http://php.net/manual/en/iterator.next.php
    * @return void
    * @uses $iteratorPosition increment by 1
    */
    public function next()
    {
        $this->iteratorPosition++;
    }
   /**
    * Test if {@link $iteratorPosition} addresses a valid element of {@link $value}
    * @link http://php.net/manual/en/iterator.valid.php
    * @return boolean true if current position is valid, false else
    * @uses $iteratorPosition test if within {@link $iteratorKeys}
    * @uses $iteratorPosition test if within {@link $value}
    */
    public function valid()
    {
        return isset($this->iteratorKeys[$this->iteratorPosition]) && isset($this->value[$this->iteratorKeys[$this->iteratorPosition]]);
    }
}
