<?php
/*
 * Project:     PeopleAggregator: a social network developement platform
 * File:        ajax_links.php, ajax file to display links module
 * Author:      tekritisoftware
 * Version:     1.1
 * Description: This file gets called from links module. It renders html
 *              for the links(inner html)
 * The lastest version of PeopleAggregator can be obtained from:
 * http://peopleaggregator.org
 * For questions, help, comments, discussion, etc. please visit 
 * http://wiki.peopleaggregator.org/index.php
 * TODO:      Need to call here link module to generate inner html
 */
  require_once dirname(__FILE__)."/../config.inc";
  $login_required = TRUE;
  global $path_prefix;
  require_once $path_prefix.'/web/functions.php';
  require_once $path_prefix.'/web/uihelper.php';
  require_once "$path_prefix/api/Links/Links.php";
  include_once "$path_prefix/api/Validation/Validation.php";
  check_session(1);
  
  $message = array();
  
  if (!empty($_POST)) {
    filter_all_post($_POST);
  }

/**
* Deleting link(s) from a particular category.
*/  
  if (!empty($_POST) && $_POST['form_action'] == 'remove_links') {
    $Links = new Links();
    $Links->link_id = explode(",", $_POST['link_id']);
    $Links->user_id = $_SESSION['user']['id'];    
    try {
      $Links->delete_link();
      $links_count = count($Links->link_id);
      $msg = ($links_count > 1) ? $links_count.' links have been' : '1 link has been';
      $msg .= ' deleted successfully';
      $json_string = '{ "errors" : "'.$msg.'", "updated_category_id" : '.$_POST['category_id'].'}';
    } catch (PAException $e) {
      $json_string = '{ "is_error" : true, "errors" : "'.$e->message.'"}';
    }
    print $json_string;
/**
* Creating a new link under the list
*/  
  } else if (!empty($_POST) && $_POST['form_action'] == 'create_link') {
    //TODO: check for empty fields
    $Links = new Links();
    $Links->user_id = $_SESSION['user']['id'];
    $Links->category_id = $_POST['category_id'];
    $Links->title = $_POST['title'];
    $Links->url = Validation::validate_url($_POST['url']);    
    try {
      $Links->save_link();
      $json_string = '{ "errors" : "Link has been added successfully", "updated_category_id" : '.$_POST['category_id'].'}';
    } catch (PAException $e) {
      $json_string = '{ "is_error" : true, "errors" : "'.$e->message.'"}';      
    }
    print $json_string;
    
  } else if (!empty($_POST) && $_POST['form_action'] == 'remove_list') {
    $Links = new Links();
    $Links->user_id = $_SESSION['user']['id'];
    $Links->category_id = $_POST['category_id'];
    
    try {
      $Links->delete_category(true);
      $json_string = '{ "errors" : "List has been deleted successfully"}';
    } catch (PAException $e) {        
      $json_string = '{ "is_error" : true, "errors" : "'.$e->message.'"}';
    }
    print $json_string;
/**
* Updating the list or category of links
*/
  } else if (!empty($_POST) && $_POST['form_action'] == 'edit_list') {
    if (!empty($_POST['updated_category_name'])) {
      $Links = new Links();
      $Links->user_id = $_SESSION['user']['id'];
      $Links->category_name = $_POST['updated_category_name'];
      $Links->category_id = $_POST['category_id'];
      
      try {        
        $Links->update_category();
        $json_string = '{ "errors" : "List has been updated successfully", "updated_category_id" : '.$_POST['category_id'].'}';
      } catch (PAException $e) {        
        $json_string = '{ "is_error" : true, "errors" : "List with specified name already exists"}';
      }
      print $json_string;
    }
    
  } else if (!empty($_POST) && $_POST['form_action'] == 'create_list') {
    $json_string = null;
    if (!empty($_POST['category_name'])) {
      $Links = new Links();
      $Links->user_id = $_SESSION['user']['id'];
      $Links->category_name = $_POST['category_name'];      
      try {
        $category_id = $Links->save_category();
        $json_string = '{ "errors" : "List has saved successfully", "updated_category_id" : '.$category_id.'}';
      } catch (PAException $e) {        
        $json_string = '{ "is_error" : true, "errors" : "List with specified name already exists"}';
      }
      print $json_string;
    }
/**
* Code for updating the selected links
*/    
  } else if (!empty($_POST) && $_POST['form_action'] == 'update_links') {
    $link_count = count($_POST['link_id_updated']);
    $Links = new Links();
    $updated_links_count = 0;
    $Links->user_id = $_SESSION['user']['id'];
    $Links->category_id = $_POST['category_id'];
    for ($counter = 0; $counter < $link_count; $counter++) {
      $Links->title = $_POST['title_updated'][$counter];      
      $Links->link_id = $_POST['link_id_updated'][$counter];
      $Links->url = $_POST['url_updated'][$counter];
      try {
        $Links->update_link();
        ++$updated_links_count;
      } catch (PAException $e) {
        $message[] = 'Link with title '.$_POST['title_updated'][$counter].' already exists';        
      }
      
    }
    $json_string = '{ "errors" : "'.uihelper_plural($updated_links_count, ' link').' out of '.$link_count.' updated successfully,'.implode(",", $message).'", "updated_category_id" : '.$_POST['category_id'].'}';
    
    $message[] = array('category_id'=> $_POST['category_id']);
    array_unshift($message, uihelper_plural($updated_links_count, ' link').' out of '.$link_count.' updated successfully');
    print_r($json_string);
    
/**
* Code for displaying the selected links for editing.
*/    
  } else if (!empty($_GET['action']) && $_GET['action'] == 'edit_list_link') {
    $Links = new Links();
    $Links->user_id = $_SESSION['user']['id'];
    $Links->link_id = explode("_", $_GET['link_ids']);
    $links = $Links->load_link();
    
    $edit_form = '<fieldset class="center_box">
      <legend>Edit links</legend>';      
    $links_count = count($links);
    $category_id = null;
    if ($links_count > 0) {
      foreach ($links as $link) {
        $category_id = $link->category_id;
        $edit_form .= '<div class="field">
            <h4><label>Link caption</label></h4>
            <input type="text" name="title_updated[]" class="text longer" value="'.$link->title.'"/>
          </div>          
          <div class="field_big">
            <h4><label>URL</label></h4>
            <input type="text" name="url_updated[]" class="text longer" value="'.$link->url.'"/>            
            <input type="hidden" name="link_id_updated[]" value="'.$link->link_id.'" />
          </div>';
      }
    }
        
      $edit_form .= '<div class="button_position">
        <input type="hidden" name="category_id" value="'.$category_id.'" />
        <input type="button" name="edit_list_links" value="Update" class="buttonbar"  onclick="javascript: list_links.edit_action()" />
      </div>
    </fieldset>';
    print $edit_form;
    
  } else if (!empty($_GET['action']) && $_GET['action'] == 'edit_list') {
    $Links = new Links();
    $params = array('category_id'=>$_GET['category_id']);
    $category = $Links->load_category($params);    
    $edit_form = '<fieldset class="center_box">
      <legend>Edit list</legend>
      <div class="field">
        <h4><label>List name</label></h4>
        <input type="text" name="updated_category_name" class="text longer" value="'.$category[0]->category_name.'" id="updated_category_name" />
      </div>
      <div class="button_position">
        <input type="hidden" name="category_id" value="'.$category[0]->category_id.'" />
        <input type="button" name="edit_category" value="Save" class="buttonbar" onclick="javascript: list.update(true)" />
      </div>
    </fieldset>';
    print $edit_form;
    
  } else if (!empty($_GET['category_id'])) {
      $condition = array('category_id'=> $_GET['category_id'], 'is_active'=> 1);
      $params_array = array('user_id'=> $_SESSION['user']['id']);
      $Links = new Links();      
      $Links->set_params ($params_array);
      $result_array = $Links->load_link ($condition);      
      $return_string = '';
      if(count($result_array) > 0) {
          for($counter =0; $counter < count($result_array); $counter++) {
              $return_string .= '<div class="field"><h4><label><input type="checkbox" name="link_id[]" id="link_id_'.$result_array[$counter]->link_id.'" value="'.$result_array[$counter]->link_id.'" /></label><a href="'.$result_array[$counter]->url.'" target="_blank">'.$result_array[$counter]->title.'</a></h4><span style="font-size:12px;">'.$result_array[$counter]->url.'</span></div>';
           }
           $return_string .= '<div class="button_position">
            <input type="button" name="btn_new_list"  class="buttonbar" value="Create new"  onclick="javascript: list_links.create();" />            
            <input type="button" name="btn_edit_list" value="Edit selected links"  onclick="javascript: list_links.edit();" class="buttonbar" />
            <input type="button" name="btn_delete_list" value="Delete selected links"  onclick="javascript: list_links.remove()" class="buttonbar"  />
           </div>';
      }
      else {
            $return_string = "<center>There are no links under this list. Click <a href=\"javascript: list_links.create();\">here</a> to add</center> ";
      }
      print $return_string;
  }
?>