index.php

   1 <?php
   2 require('header.php');
   3
   4 include('lib/db.php');
   5 include('lib/utils.php');
   6
   7 /**
   8  * [session_start start a unique session for the current browser client]
   9  */
  10 session_start();
  11
  12 $page = filter_input(INPUT_GET, 'page', FILTER_SANITIZE_URL);
  13 $isPage = true;
  14 if (!isset($page)) {
  15     $isPage = false;
  16     $page = "";
  17 }
  18
  19 /**
  20  * form MUST have an hidden field named 'form' to enable proper routing
  21  */
  22 $form = filter_input(INPUT_POST, 'form', FILTER_SANITIZE_URL);
  23 $isForm = true;
  24 if (!isset($form)) {
  25     $isForm = false;
  26     $form = "";
  27 }
  28
  29 function get_action_type() {
  30     global $isPage, $isForm;
  31
  32     if ($isPage && !$isForm && is_get_request()) {
  33         return "page";
  34     } elseif ($isForm && !$isPage && is_post_request()) {
  35         return "form";
  36     } elseif (!$isPage && !$isForm && is_get_request()){
  37         return "empty";
  38     } else {
  39         return "unknown";
  40     }
  41 }
  42
  43 function get_url_action() {
  44     global $page, $form;
  45
  46     if (get_action_type() === "page") {
  47         return $page;
  48     } elseif (get_action_type() === "form") {
  49         return $form;
  50     } elseif (get_action_type() === "empty") {
  51         return "";
  52     } elseif (get_action_type() === "unknown") {
  53         die('Cannot get a valid action from URL parameters');
  54     }
  55 }
  56
  57 /**
  58  * [validate_url_action validate if the current page is a valid site actions]
  59  * @param  [string] $page [the viewed page name]
  60  * @return [string]       [the valid matching action or the default action
  61  *                         if the action name do not exist ]
  62  */
  63 function validate_url_action($action_name)
  64 {
  65     global $configs;
  66
  67     foreach ($configs['actions'] as $action) {
  68         if (strcmp($action_name, $action) === 0) {
  69             // The actions list can't have duplicated entries
  70             return $action;
  71         }
  72     }
  73     // Return the default action
  74     return $configs['actions'][0];
  75 }
  76
  77 function display_action($action_name)
  78 {
  79     global $configs, $isPage, $isForm;
  80
  81     $found_action = false;
  82     foreach ($configs['actions'] as $action) {
  83         if (strcmp($action_name, $action) === 0) {
  84             // HTTP GET case
  85             if (get_action_type() === "page" || get_action_type() === "empty") {
  86                 include($action . ".php");
  87             // HTTP POST case
  88             } elseif (get_action_type() === "form") {
  89                 include("form" . $action . ".php");
  90             } else {
  91                 echo "Unknown error in action displaying";
  92             }
  93             $found_action = true;
  94             break;
  95         }
  96     }
  97     if (!$found_action) {
  98         echo "Action to display do not exist";
  99     }
 100 }
 101
 102 $url_action = get_url_action();
 103 $action = validate_url_action($url_action);
 104 display_action($action);
 105
 106 session_destroy();
 107
 108 require('footer.html');
 109 ?>