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<?php namespace ProcessWire;

/**
 * ProcessWire Page List Select Multiple Inputfield module
 *
 * A Page List Selector for selecting multiple pages
 *
 * ProcessWire 3.x, Copyright 2022 by Ryan Cramer
 * https://processwire.com
 * 
 * @property string $removeLabel
 * @property string $moreLabel
 * @property string $unselectLabel
 * @property string $selectLabel
 * @property string $cancelLabel
 * @property string $startLabel
 * @property string $labelFieldName
 * @property int $parent_id
 * 
 *
 */

class InputfieldPageListSelectMultiple extends Inputfield 
  implements InputfieldHasArrayValue, InputfieldPageListSelection, InputfieldHasSortableValue {

  public static function getModuleInfo() {
    return array(
      'title' => __('Page List Select Multiple', __FILE__), // Module Title
      'summary' => __('Selection of multiple pages from a ProcessWire page tree list', __FILE__), // Module Summary
      'version' => 103,
      'permanent' => true, 
    );
  }

  public function init() {
    parent::init();
    
    $this->set('parent_id', 0); 
    $this->set('labelFieldName', 'title');
    $this->set('startLabel', $this->_('Add'));
    $this->set('cancelLabel', $this->_('Cancel'));
    $this->set('selectLabel', $this->_('Select'));
    $this->set('unselectLabel', $this->_('Unselect'));
    $this->set('moreLabel', $this->_('More'));
    $this->set('removeLabel', $this->_('Remove'));
  }

  protected function renderListItem($label, $value, $class = '') {
    if($class) $class = " $class";
    $out =  
      "<li class='ui-state-default$class'>" . 
      // "<span class='ui-icon ui-icon-arrowthick-2-n-s'></span>" . 
      "<i class='itemSort fa fa-arrows'></i> " . 
      "<span class='itemValue'>$value</span>" .
      "<span class='itemLabel'>$label</span> " . 
      "<a class='itemRemove' title='$this->removeLabel' href='#'><i class='fa fa-trash'></i></a>" . 
      "</li>";
    return $out; 
  }
  
  public function renderReady(Inputfield $parent = null, $renderValueMode = false) {
    static $process = null;
    if(is_null($process)) {
      /** @var ProcessPageList $process */
      $process = $this->wire('modules')->get('ProcessPageList'); // prerequisite module
      $process->setPageLabelField($this->attr('name'), $this->labelFieldName);
      $process->renderReady();
    }
    return parent::renderReady($parent, $renderValueMode);
  }

  public function ___render() {

    if(!strlen($this->parent_id)) {
      return "<p class='error'>" . $this->_('Unable to render this field due to missing parent page in field settings.') . '</p>';
    }

    $out = "<ol id='{$this->id}_items'>" . $this->renderListItem("Label", "1", "itemTemplate"); 

    foreach($this->value as $page_id) {
      $page = $this->pages->get((int) $page_id); 
      if(!$page || !$page->id) continue; 
      $label = $page->getText($this->labelFieldName, true, true);
      if(!strlen($label)) $label = $page->name;
      $out .= $this->renderListItem($label, $page->id); 
    }
    
    $out .= "</ol>";

    $this->addClass('InputfieldPageListSelectMultipleData');
    $attrs = $this->getAttributes();
    unset($attrs['value']);
    
    $attrs['data-root'] = $this->parent_id; // rootPageID
    $attrs['data-href'] = "#wrap_{$this->id}"; // selectSelectHref
    $attrs['data-start'] = $this->startLabel; // selectStartLabel
    $attrs['data-cancel'] = $this->_('Close'); // $this->cancelLabel; // selectCancelLabel
    $attrs['data-select'] = $this->selectLabel; // selectSelectLabel
    $attrs['data-selected'] = $this->_('Selected'); 
    $attrs['data-unselect'] = $this->unselectLabel; // selectUnselectLabel
    $attrs['data-more'] = $this->moreLabel; // moreLabel
    $attrs['data-labelName'] = $this->attr('name');
  
    $attrStr = $this->getAttributesString($attrs);
    $attrStr = "value='" . implode(',', $this->value) . "' $attrStr";
    $out .= "<input type='text' $attrStr />";

    return $out; 
  }

  /**
   * Convert the CSV string provide in the $input to an array of ints needed for this fieldtype
   * 
   * @param WireInputData $input
   * @return $this
   *
   */
  public function ___processInput(WireInputData $input) {

    parent::___processInput($input); 

    $value = $this->attr('value');  
    if(is_array($value)) $value = reset($value); 
    $value = trim($value); 

    if(strpos($value, ",") !== false) $value = explode(",", $value); 
      else if($value) $value = array($value);
      else $value = array();

    foreach($value as $k => $v) {
      $value[$k] = (int) $v; 
    }

    $this->attr('value', $value); 

    return $this; 
  }
  
}