<?php
// $Id: editablefields.module,v 1.1.2.3 2007-09-06 09:54:21 markfoodyburton Exp $

function editablefields_help($section = 'admin/help#editablefields') {
  switch ($section) {
    case 'admin/modules#description':
      return t('Plugin for views to make some fields editable.');
  }
}


function editablefields_views_style_plugins() {
  $result = array(
    'editablefields_table' => array(
      'name' => t('Editablefields - table'),
      'theme' => 'views_editablefields_view_table',
      'needs_fields' => true,
      'needs_table_header' => true,
      'even_empty' => true,
      ),
    'editablefields_list' => array(
      'name' => t('Editablefields - list'),
      'theme' => 'views_editablefields_view_list',
      'needs_fields' => true,
      'needs_table_header' => true,
      'even_empty' => true,
      ),
    );

  return $result;
}


function editablefields_field_formatter_info()
{
  return array(
    'editable' => array(
      'label' => 'Editable',
      'field types' => array_keys(_content_field_types()),
      ));
}


/**
 * handle editable field forms, and return back if there are editable fields
 */
function _editablefields_node_load_and_update($nid,$oldnode=NULL)
{
  
  $node=node_load($nid);
  if (node_access("update",$node)) {
    
    $nodeupdate=FALSE;
    if ($_POST['op']) {
      foreach ($_POST as $post => $value) {
        if (sscanf($post, "editablefield_%d_%s",$nid,$fieldname) == 2) {
          if ($nid == $node->nid) {
            if ($node->$fieldname != $value) {
              $node->$fieldname=$oldnode?$oldnode->$fieldname:$value;
              $nodeupdate=TRUE;
            }
          }
        }
      }
    }
  }
  
  return $nodeupdate? $node : NULL;
}

function _handle_editablefield_form_input($view, $nodes) {
// it's really hard to check for each field, as we would have to decode the info
// data, I guess we could, but I dont see the harm, we will revent people from
// writing to nodes they are not allowed to below anyway.
  
  $editable=false;
  foreach ($view->field as $field) {
    
    if ($field['options'] == 'editable') {
      $editable=true;
    }
  }
  /*  if ($editable) { // we dont need to be THIS zealous
    $editable=FALSE;
    foreach ($nodes as $node) {
      if (node_access("update",$node)) {
        $editable=TRUE;
      }
    }
  }
  */
  if ($editable) {
    foreach ($nodes as $node) {
      if ($node=_editablefields_node_load_and_update($node->nid)) {
 
        global $viewfield_stack;
        $tmp=$viewfield_stack;
        $viewfield_stack=array();

        node_validate($node);
        if (! form_get_errors()) {
          $node=_editablefields_node_load_and_update($node->nid);
          $node=node_submit($node);
          // this will ensure that we do not touch ANY fields, appart from the
          // ones we are aloud to touch
         $node=_editablefields_node_load_and_update($node->nid,$node);

          node_save($node);
        }

        $viewfield_stack=$tmp;
      }
    }
  }
  return $editable;
}

function _editablefields_make_form_ids_unique($form, $nid) {
  // much of this code is from form_builder. we set input elements' #id to a
  // unique id by postpending -$nid.

  if ((!empty($form['#type'])) && ($info = _element_info($form['#type']))) {
    // overlay $info onto $form, retaining preexisting keys in $form
    $form += $info;
  }

  if (isset($form['#input']) && $form['#input']) {
    $form['#id'] = (isset($form['#id'])) ? $form['#id'] : 'edit-' . implode('-', $form['#parents']);
    $form['#id'] .= '-' . $nid;
  }

  // recurse through sub-elements
  foreach (element_children($form) as $key) {
    // don't squash an existing tree value
    if (!isset($form[$key]['#tree'])) {
      $form[$key]['#tree'] = $form['#tree'];
    }

    // don't squash existing parents value
    if (!isset($form[$key]['#parents'])) {
      // Check to see if a tree of child elements is present. If so, continue down the tree if required.
      $form[$key]['#parents'] = $form[$key]['#tree'] && $form['#tree'] ? array_merge($form['#parents'], array($key)) 
: array($key);
    }
    $form[$key] = _editablefields_make_form_ids_unique($form[$key], $nid);
  }
  return $form;
}


function _editablefields_content_form_field(&$node, $fieldname)
{
  $form = array();
  $type_name = is_string($node) ? $node : (is_array($node) ? $node['type'] : $node->type);
  $types = content_types($type_name);

  $field=$types['fields'][$fieldname];
  $widget_types = _content_widget_types();

    // Set form parameters so we can accept file uploads.
  if (count($type['fields'])) {
    $form['#attributes'] = array("enctype" => "multipart/form-data");
  }
  
  _editablefields_content_widget_invoke_field('prepare form values', $node,$field,$widget_types);
  $form = array_merge($form,_editablefields_content_widget_invoke_field('form',$node,$field,$widget_types));
  
  return $form;
  
}
 
/**
 * Invoke a widget hook for one field.
 */
function _editablefields_content_widget_invoke_field($op, &$node,  $field, $widget_types) 
{
  $return = array();
  
  $node_field = isset($node->$field['field_name']) ? $node->$field['field_name'] : array();
    
  $module = $widget_types[$field['widget']['type']]['module'];
  $function = $module .'_widget';
  
  if (function_exists($function)) {
    
    // If we're building a node creation form, pre-fill with default values
    if ($op == 'prepare form values' && empty($node->nid)) {
      $node_field = array_merge($node_field, content_default_value($node, $field, $node_field));
    }
    
    $result = $function($op, $node, $field, $node_field);
    if (is_array($result) && $op == 'form') {
      $result[$field['field_name']]['#weight'] = $field['widget']['weight'];
    }
    if (is_array($result)) {
      $return = array_merge($return, $result);
    }
    else if (isset($result)) {
      $return[] = $result;
    }
  }
  // test for values in $node_field in case modules added items
  if (is_object($node) && (isset($node->$field['field_name']) || count($node_field))) {
    $node->$field['field_name'] = $node_field;
  }

  return $return;
  
}

/**
 * Themeable function to handle displaying a specific field.
 */
function theme_views_editablefields_handle_field($fields, $field, $data) {
  $info = $fields[$field['fullname']];

  if ($field['options'] == 'editable') {
      
    $node=node_load($data->nid);
    if (node_access("update",$node)) {
      if ($info['content_field']['field_name']) {
        $form=array();
        
        global $viewfield_stack;
        $tmp=$viewfield_stack;
        $viewfield_stack=array();
        $form=_editablefields_content_form_field($node, $info['content_field']['field_name']);
        $viewfield_stack=$tmp;
        
        foreach (element_children($form) as $key) {
          $form["editablefield_".$data->nid."_".$key]=$form[$key];
          unset($form[$key]);
        }
        
        $form=_editablefields_make_form_ids_unique($form,$data->nid);
        $form=form_builder('editableviewfield',$form);
        
        return $form=drupal_render_form('editableviewfield',$form);
      } // no access, so silently just print field out.
    } else {
      drupal_set_message("enable CCK if you wish to edit fields");
    }
  }

  if ($field['handler'] && function_exists($field['handler'])) {
    return $field['handler']($info, $field, $data->$field['queryname'], $data);
  }

  if ($info['handler'] && is_string($info['handler']) && function_exists($info['handler'])) {
    return $info['handler']($info, $field, $data->$field['queryname'], $data);
  }

  return check_plain($data->$field['queryname']);
}

/**
 * Display the nodes of a view as a list.
 */
function theme_views_editablefields_view_list($view, $nodes, $type) {
  $fields = _views_get_fields();

  $editable=_handle_editablefield_form_input($view, $nodes);
  foreach ($nodes as $node) {
    $item = '';
    foreach ($view->field as $field) {
      if (!isset($fields[$field['id']]['visible']) && $fields[$field['id']]['visible'] !== FALSE) {
        if ($field['label']) {
          $item .= "<div class='view-label ". views_css_safe('view-label-'. $field['queryname']) ."'>" . $field['label'] . "</div>";
        }
        $item .= "<div class='view-field ". views_css_safe('view-data-'. $field['queryname']) ."'>" . views_theme_field('views_editablefields_handle_field', $field['queryname'], $fields, $field, $node, $view) . "</div>";
      }
    }
    $items[] = "<div class='view-item ". views_css_safe('view-item-'. $view->name) ."'>$item</div>\n"; // l($node->title, "node/$node->nid");
  }
    $html=theme('item_list', $items);
    
    if ($editable) {
      $newentry_form=_editablefields_entry_form($view);
      if ($nodes) {
	$form['editablefields']['submit']= array('#type' => 'submit', '#value' => t('Submit'));
	$form['editablefields']['#value']=$html;
	drupal_process_form('editablefields',$form);
	$eform=drupal_render($form);
	return $eform.$newentry_form;
      } else {
	return $newentry_form;
      }
    } else {
      return $html;
    }
}

/**
 * Display the nodes of a view as a table.
 */
function theme_views_editablefields_view_table($view, $nodes, $type) {
  $fields = _views_get_fields();

  $editable=_handle_editablefield_form_input($view, $nodes);

  foreach ($nodes as $node) {
    $row = array();
    foreach ($view->field as $field) {
      if ($fields[$field['id']]['visible'] !== FALSE) {
        $cell['data'] = views_theme_field('views_editablefields_handle_field', $field['queryname'], $fields, $field, $node, $view);
        $cell['class'] = "view-field ". views_css_safe('view-field-'. $field['queryname']);
        $row[] = $cell;
      }
    }
    $rows[] = $row;
  }
  $html=theme('table', $view->table_header, $rows );
    if ($editable) {
      $newentry_form=_editablefields_entry_form($view);
      if ($nodes) {
	$form['editablefields']['submit']= array('#type' => 'submit', '#value' => t('Submit'));
	$form['editablefields']['#value']=$html;
	drupal_process_form('editablefields',$form);
	$eform=drupal_render($form);
	return $eform.$newentry_form;
      } else {
	return $newentry_form;
      }
    } else {
      return $html;
    }
}

function _editablefields_node_type($view) {
  $editable=false;
  foreach ($view->field as $field) {
    if ($field['options'] == 'editable') {
      $editable=true;
    }
  }
  $type = false;
  if ($editable) {
    foreach ($view->filter as $filter) {
      if ($filter['field'] == 'node.type') {
        $type = $filter['value'][0];
        break;
      }
    }
  }
  return $type;
}


function _editablefields_entry_form($view)
{
  $type=_editablefields_node_type($view);
  if (!$type) {
    return '';
  }

  global $user;

  $types = node_get_types();
  $type = isset($type) ? str_replace('-', '_', $type) : NULL;
  // If a node type has been specified, validate its existence.
  if (isset($types[$type]) && node_access('create', $type)) {
    // Initialize settings:
    $node = array('uid' => $user->uid, 'name' => $user->name, 'type' => $type, 'language' => '');

    $form = _editablefields_drupal_get_form(false,$type,$view);
    $output = drupal_render_form($type.'_node_form',$form);
  }
 return '<div class="view_footer_form">'.$output.'</div>';
}

function editablefields_views_pre_query(&$view)
{
  if ($_POST['editablefields_addnew_form']) {
    $type=_editablefields_node_type($view);
    if (!$type) {
      return;
    }
    _editablefields_drupal_get_form(true,$type,$view);
  }
}


function _editablefields_drupal_get_form($process=false, $type,$view) {
  $form_id=$type.'_node_form';
  $node = array('uid' => $user->uid, 'name' => $user->name, 'type' => $type, 'language' => '');
  $form_state = array('storage' => NULL, 'submitted' => FALSE);

  $form_state['post'] = $_POST;
  $form=drupal_retrieve_form($form_id,$node);
  $form_build_id = 'form-'. md5(mt_rand());
  $form['#build_id'] = $form_build_id;
  $form['editablefields_addnew_form']=array('#type' => 'hidden', '#value' => $type);


  foreach ($view->argument as $id => $arg) {
    if (preg_match('/^content: (field_.*)$/',$arg['type'],$matches)) {
      $fieldname=$matches[1];
      $form['editablefieldsfiltervalue_'.$fieldname]=array('#type'=>'value','#value'=>array($view->args[$id]));
    }
  }
  
  foreach ($view->filter as $filter) {
    if (preg_match('/^node_data_(.*)\.\1_(.*)$/',$filter['field'], $matches)) {
      $fieldname=$matches[1];
      $valuename=$matches[2];
      $form['editablefieldsfiltervalue_'.$fieldname]=array('#type'=>'value','#value'=>$filter['value']);
    }
  }

  drupal_prepare_form($form_id, $form, $form_state);
    
  if (!empty($form['#cache'])) {
    // By not sending the form state, we avoid storing the storage which
    // won't have been touched yet.
    form_set_cache($form_build_id, $form, NULL);
  }
  unset($form_state['post']);
  $form['#post'] = $_POST;
    
  if ($process) {
    drupal_process_form($form_id, $form, $form_state);
  } 
  
  return $form;  
}

function editablefields_form_alter($form_id, &$form) {
  foreach ($form as $key=>$f) {
    if (preg_match('/^editablefieldsfiltervalue_(.*)$/',$key, $matches)) {
      $fieldname=$matches[1];
      foreach ($form[$fieldname] as $element=>$val) {
        if (is_array($val) && is_array($val['#default_value'])) {
          $form[$fieldname][$element]['#default_value']=$f['#value'];
        }
        
      }
    }
  }
}


?>