Better category handling

Fix #3

posts.php

 <?php theme_include('header'); ?>
 
 <section class="content">
-
+    <?php
+        $title="Blog";
+        if (preg_match('/category.*/',current_url())){
+            echo "<p id='".current_url()."'></p>";
+            while(categories()){
+                echo "<p id='".category_url()."'></p>";
+                if(category_url() == "/".current_url()){
+                    $title.=" - ".category_title();
+                }
+            }
+        }
+        echo "<h1 style='text-align:center'>$title</h1>\n";
+    ?>
 	<?php if(has_posts()): ?>
 		<ul class="items">
             <?php posts(); ?>
             <li>
-                <h1> Dernier article </h1>
+                <h2> Dernier article </h2>
                 <?php include("single_article.php"); ?>
             </li>
-            <li style="background:none">
-            <h1> Catégories d'articles </h1>
+
+            <?php if (!preg_match('/category.*/',current_url())): ?>
+            <li id="<?php echo current_url();?>" style="background:none">
+                    <h2> Catégories d'articles </h2>
                     <?php $i = 0; while(categories()): ?>
-            <?php $bg = sprintf('background: hsl(131,  6%%, %d%%);', round(50-((++$i / posts_per_page()) * 20))); ?>
+                        <?php $bg = sprintf('background: hsl(131,  6%%, %d%%);', round(50-(($i / total_categories()) * 20))); ?>
+                        <?php if(category_count() > 0 ):?>
+                            <?php ++$i; ?>
                             <li style="<?php echo $bg; ?>">
                             <?php include("single_category.php"); ?>
                             </li>
-            </li>
+                        <?php endif; ?>
                     <?php endwhile; ?>
+                </li>
+            <?php endif; ?>
+
+            <?php if(total_posts() > 1 || $title=="Blog"):?>
                 <li style="background:none">
-            <h1> Articles précédents </h1>
+                    <h2> Articles précédents </h2>
                 <?php $i = 0; while(posts()): ?>
                     <?php $bg = sprintf('background: hsl(131,  6%%, %d%%);', round(50-((++$i / posts_per_page()) * 20))); ?>
                     <li style="<?php echo $bg; ?>">
                         <?php include("single_article.php"); ?>
                     </li>
-            </li>
                     <?php endwhile; ?>
+                </li>
+            <?php endif?>
 		</ul>
 
 		<?php if(has_pagination()): ?>

single_category.php

@@ -7,4 +7,9 @@
         <div class="contents">
             <?php echo category_description(); ?>
         </div>
+        <footer>
+        <p>
+        Cette catégorie regroupe <?php echo category_count(); ?> <?php echo pluralise(category_count(), "article", "s")?>.
+        </p> 
+        </footer>
 </article>