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<?php namespace ProcessWire;

/**
 * Inputfield for icon selection
 *
 * @property bool $prefixValue Should value attribute always start with prefix? (externally)
 * 
 */
class InputfieldIcon extends Inputfield {
  
  public static function getModuleInfo() {
    return array(
      'title' => __('Icon', __FILE__), // Module Title
      'summary' => __('Select an icon', __FILE__), // Module Summary
      'version' => 3,
    );
  }
  
  const prefix = 'fa-';
  
  protected $options = array();

  /**
   * Construct
   * 
   */
  public function __construct() {
    parent::__construct();
    $this->options = file(__DIR__ . '/icons.inc', FILE_IGNORE_NEW_LINES); 
    $this->set('prefixValue', true); // should value attr always start with prefix? (externally)
  }

  /**
   * Init
   * 
   */
  public function init() {
    parent::init();
    $this->icon = 'puzzle-piece';
  }

  /**
   * Render
   * 
   * @return string
   * 
   */
  public function ___render() {
    $out = '';
    $attrs = $this->getAttributes();
    $value = $attrs['value'];
    if($value && strpos($value, self::prefix) !== 0) $value = self::prefix . $value;
    if($value) $this->icon = $value;
    unset($attrs['value']);
    $out .= "<select " . $this->getAttributesString($attrs) . ">";
    if(!$this->getSetting('required')) $out .= "<option value=''></option>";
    foreach($this->options as $option) {
      $option = trim($option); 
      $selected = $value == $option ? " selected='selected'" : "";
      $label = ucfirst(substr($option, 3)); 
      $label = str_replace('-', ' ', $label); 
      $out .= "<option$selected value='$option'>$label</option>";
    }
    $out .= "</select>&nbsp;";
    $out .=
      "<i class='fa fa-fw fa-angle-right ui-priority-secondary'></i>" . 
      "<a class='InputfieldIconShowAll' href='#'>" . 
      "<small>" . $this->_('Show All Icons') . "</small></a>" . 
      "<div class='InputfieldIconAll'></div>";
    return $out;

  }

  /**
   * Set attribute
   * 
   * @param array|string $key
   * @param array|bool|int|string $value
   * @return Inputfield
   * 
   */
  public function setAttribute($key, $value) {
    if($key === 'value' && !empty($value)) {
      if(strpos($value, self::prefix) !== 0) $value = self::prefix . $value;
      $index = array_search($value, $this->options);
      if(is_int($index)) {
        $value = $this->options[$index];
      } else {
        $value = '';
      }
    }
    return parent::setAttribute($key, $value); 
  }

  /**
   * Get attribute
   * 
   * @param string $key
   * @return bool|mixed|null|string
   * 
   */
  public function getAttribute($key) {
    if($key === 'value') {
      $value = parent::getAttribute($key);
      if(empty($value)) return $value;
      if($this->getSetting('prefixValue')) {
        if(strpos($value, self::prefix) !== 0) {
          // add prefix 
          $value = self::prefix . $value;
        }
      } else {
        if(strpos($value, self::prefix) === 0) {
          // remove prefix
          $value = substr($value, strlen(self::prefix));
        }
      }
      return $value;
    }
    return parent::getAttribute($key);
  }

}