source: inc/admin/actions/class.dcaction.php @ 1806:6a0391e85f73

<?php
# -- BEGIN LICENSE BLOCK ---------------------------------------
#
# This file is part of Dotclear 2.
#
# Copyright (c) 2003-2013 Olivier Meunier & Association Dotclear
# Licensed under the GPL version 2.0 license.
# See LICENSE file or
# http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
#
# -- END LICENSE BLOCK -----------------------------------------
if (!defined('DC_RC_PATH')) { return; }

/**
* dcActionsPage -- handler for action page on selected entries
*
*/
abstract class dcActionsPage
{
     /** @var string form submit uri */
     protected $uri;
     /** @var dcCore dotclear core instance */
     protected $core;
     /** @var array action combo box */
     protected $combo;
     /** @var array list of defined actions (callbacks) */
     protected $actions;
     /** @var array selected entries (each key is the entry id, value contains the entry description) */
     protected $entries;
     /** @var record record that challenges ids against permissions */
     protected $rs;
     /** @var array redirection $_GET arguments, if any (does not contain ids by default, ids may be merged to it) */
     protected $redir_args;
     /** @var array list of $_POST fields used to build the redirection  */
     protected $redirect_fields;
     /** @var string current action, if any */
     protected $action;
     
     /** @var string title for checkboxes list, if displayed */
     protected $cb_title;
     
    /**
     * Class constructor
     * 
     * @param mixed  $core   dotclear core
     * @param mixed  $uri   form uri
     *
     * @access public
     *
     * @return mixed Value.
     */
     public function __construct($core,$uri) {
          $this->core = $core;
          $this->actions = new ArrayObject();
          $this->combo = array();
          $this->uri = $uri;
          $this->redir_args = array();
          $this->redirect_fields = array();
          $this->action = '';
          $this->cb_title = __('Title');
     }
     
    /**
     * addAction - adds an action
     *
     * @param string $actions the actions names as if it was a standalone combo array.
      *                              It will be merged with other actions.
      *                              Can be bound to multiple values, if the same callback is to be called
     * @param callback $callback the callback for the action.
     *
     * @access public
      *
     * @return dcActionsPage the actions page itself, enabling to chain addAction().
     */
     public function addAction ($actions,$callback) {
          foreach ($actions as $k => $a) {
               // Check each case of combo definition
               // Store form values in $values
               if (is_array($a)) {
                    $values = array_values($a);
                    if (!isset($this->combo[$k])) {
                         $this->combo[$k]=array();
                    }
                    $this->combo[$k] = array_merge ($this->combo[$k],$a);
               } elseif ($a instanceof formSelectOption) {
                    $values = $a->value;
                    $this->combo[$k] = $a->value;
               } else {
                    $values = $a;
                    $this->combo[$k] = $a;
               }
               // Associate each potential value to the callback
               foreach ($values as $v) {
                    $this->actions[$v]=$callback;
               }
          }
          return $this;
     }
     
    /**
     * getCombo - returns the actions combo, useable through form::combo
     *
     * @access public
      *
     * @return array the actions combo
     */
     public function getCombo() {
          return $this->combo;
     }
     
     
    /**
     * getIDS() - returns the list of selected entries
     *
     * @access public
      *
     * @return array the list
     */
     public function getIDs() {
          return array_keys($this->entries);
     }
     
    /**
     * getIDS() - returns the list of selected entries as HTML hidden fields string
     *
     * @access public
      *
     * @return string the HTML code for hidden fields
     */
      public function getIDsHidden() {
          $ret = '';
          foreach  ($this->entries as $id->$v) {
               $ret .= form::hidden('entries[]',$id);
          }
          return $ret;
     }
     
    /**
     * getHiddenFields() - returns all redirection parameters as HTML hidden fields
     *
     * @param boolean $with_ids if true, also include ids in HTML code
      *
     * @access public
      *
     * @return string the HTML code for hidden fields
     */   
     public function getHiddenFields($with_ids = false) {
          $ret = '';
          foreach ($this->redir_args as $k => $v) {
               $ret .= form::hidden(array($k),$v);
          }
          if ($with_ids) {
               $ret .= $this->getIDsHidden();
          }
          return $ret;
     }
     
     
     /**
     * getRS() - get record from DB Query containing requested IDs
     *
     * @param boolean $with_ids if true, also include ids in HTML code
      *
     * @access public
      *
     * @return string the HTML code for hidden fields
     */
     public function getRS() {
          return $this->rs;
     }
     
     /**
     * setupRedir - setup redirection arguments
      *  by default, $_POST fields as defined in redirect_fields attributes
      *  are set into redirect_args.
     *
     * @param array $from input to parse fields from (usually $_POST)
      *
     * @access protected
     */
     protected function setupRedir($from) {
          foreach ($this->redirect_fields as $p) {
               if (isset($from[$p])) {
                    $redir_args[$p] = $from[$p];
               }
          }
     }

     /**
     * getRedirection - returns redirection URL
     *
     * @param array $params extra parameters to append to redirection
      *                            must be an array : each key is the name, 
      *                            each value is the wanted value
     * @param boolean $with_selected_entries if true, add selected entries in url
      *
     * @access public
      *
     * @return string the redirection url
     */
     public function getRedirection($params=array(),$with_selected_entries=false) {
          $redir_args = array_merge($params,$this->redir_args);
          if ($with_selected_entries) {
               $redir_args['entries'] = array_keys($this->entries);
          }
          return $this->uri.'?'.http_build_query($redir_args);
     }

     /**
     * redirect - redirects to redirection page
     *
      * @see getRedirection for arguments details
      *
     * @access public
     */
     public function redirect($params=array(),$with_selected_entries=false) {
          http::redirect($this->getRedirection($params,$with_selected_entries));
     }    
     
     /**
     * getAction - returns current action, if any
     *
      * @see getRedirection for arguments details
      *
     * @access public
      *
     * @return string the action
     */
     public function getAction() {
          return $this->action;
     }

     /**
     * process - proceeds action handling, if any
      *             this method may issue an exit() if
      *             an action is being processed. If it
      *             returns, no action has been performed
     *
     * @access public
     */
     public function process() {
          $from = new ArrayObject($_POST);
          $this->setupRedir($from);
          $this->fetchEntries($from);   
          if (isset($from['action'])) {
               $this->action = $from['action'];
               try {
                    $performed=false;
                    foreach ($this->actions as $k=>$v) {
                         if ($from['action']==$k) {
                              $performed = true;
                              call_user_func($v,$this->core,$this,$from);
                         }
                    }
                    if ($performed) {
                         exit;
                    }
               } catch (Exception $e) {
                    $this->error($e);
               }
          }
     }

     /**
     * getcheckboxes -returns html code for selected entries
      *             as a table containing entries checkboxes
     *
     * @access public
      *
     * @return string the html code for checkboxes
     */
     public function getCheckboxes() {
          $ret = 
               '<table class="posts-list"><tr>'.
               '<th colspan="2">'.$this->cb_title.'</th>'.
               '</tr>';
          foreach ($this->entries as $id=>$title) {
               $ret .= 
                    '<tr><td>'.
                    form::checkbox(array('entries[]'),$id,true,'','').'</td>'.
                    '<td>'.   $title.'</td></tr>';
          }
          $ret .= '</table>';
          return $ret;
     }
     
     /**
     * beginPage, endPage - displays the beginning/ending of a page, if action does not redirects dirtectly
     *
      * These methods are called from the actions themselves.
      *
     * @param string $breadcrumb breadcrumb to display
     * @param string $head    page header to include
      *
     * @access public
     */
     abstract public function beginPage($breadcrumb='',$head='');
     abstract public function endPage();

     /**
     * fetchEntries - fills-in information by requesting into db
      *   this method may setup the following attributes
      *   * entries : list of entries (checked against permissions)
      *      entries ids are array keys, values contain entry description (if relevant)
     *   * rs : record given by db request
     * @access protected
     */
      abstract protected function fetchEntries($from);

}