saving categories preferences

categoriesHandling.php

@@ -0,0 +1,63 @@
+<?php
+
+/**
+ * @brief inits the categories from cookies and URL params
+ *
+ * @param $db: a PDO connection to the database
+ *
+ * @warning session_start() MUST have been called before calling this function
+ */
+function initCategories($db)
+{
+    if(!isset($_SESSION['categorieStatus']))
+    {
+        //init all categories
+        $categories = getCategories($db);
+        foreach($categories as $cat)
+            $_SESSION['categorieStatus'][$cat['cat_id']] = true;
+
+        //loading from preferences
+        loadCategoriesFromCookie();
+    }
+}
+
+/**
+ * @brief loads the categories preferences from the cookie
+ */
+function loadCategoriesFromCookie()
+{
+    if(isset($_COOKIE['categorieStatus']))
+    {
+        $categories = unserialize($_COOKIE['categorieStatus']);
+        if(is_array($categories))
+            for($i = 0; $i < count($categories); ++$i)
+                if(is_bool($categories[$i]))
+                    $_SESSION[$i] = $categories[$i];
+    }
+}
+
+/**
+ * @brief saves the categories preferences from $_POST to $_SESSION
+ *
+ * @warning $_SESSION['categorieStatus] MUST have been populated before calling this function
+ */
+function saveCategoriesPostToSession()
+{
+    foreach($_SESSION['categorieStatus'] as $cat_id => $cat_value)
+    {
+        $catPostName = 'cat_'.$cat_id;
+        if(isset($_POST[$catPostName]))
+            $_SESSION['categorieStatus'][$cat_id] = ($_POST[$catPostName] == 'on');
+        else
+            $_SESSION['categorieStatus'][$cat_id] = false;
+    }
+}
+
+/**
+ * @brief saves the categories preferences from $_SESSION to a cookie
+ */
+function saveCategoriesSessionToCookie()
+{
+    setcookie('categorieStatus', serialize($_SESSION['categorieStatus']), strtotime('+6 months'), null, null, false, true);
+}
+?>

index.php

@@ -2,8 +2,11 @@
 session_start();
 include_once('databaseOperations.php');
 include_once('datetimeOperations.php');
+include_once('categoriesHandling.php');
 $db = connect();
 
+initCategories($db);
+
 if(isset($_GET['w'])&&is_numeric($_GET['w']))
     $weekOffset = $_GET['w'];
 else
@@ -61,7 +64,7 @@ else
                                 $cat_id = $categories[$cat_it]['cat_id'];
                                 $cat_title = $categories[$cat_it]['cat_title'];
                         ?>
-                        <input type="checkbox" id="cat_<?php echo $cat_id; ?>" name="cat_<?php echo $cat_id; ?>" />
+                        <input type="checkbox" id="cat_<?php echo $cat_id; ?>" name="cat_<?php echo $cat_id; ?>" <?php if($_SESSION['categorieStatus'][$cat_id]) echo 'checked'; ?> />
                         <label for="cat_<?php echo $cat_id; ?>"><span></span><?php echo $cat_title;?></label><br />
                         <?php
                             }
@@ -71,6 +74,7 @@ else
                     <?php
                     }
                     ?>
+                    <input type="submit" id="change" value="sauvegarder cat&eacute;gories" />
                 </form>
                 <a id="ancherEvent" href="./addEvent.php">
                     <div class="Button" id="AddEvent">

update-categories.php

@@ -0,0 +1,9 @@
+<?php
+session_start();
+include_once('categoriesHandling.php');
+
+saveCategoriesPostToSession();
+saveCategoriesSessionToCookie();
+
+header('Location:./');
+?>