Add no purge, manual delete options (#12)

- Add htmx, hx attributes
- Only add/update items since last check
- Move messages to session to persist across redirects
- Polish styles a bit (still WIP)

src/public/item.php

@@ -30,6 +30,26 @@ if ($_SERVER['REQUEST_METHOD'] == 'POST') {
     frc_redirect('/');
 }
 
+if ($_SERVER['REQUEST_METHOD'] == 'DELETE') {
+    $deleteQuery = $db->prepare(<<<'SQL'
+        DELETE FROM item
+         WHERE id IN (
+                 SELECT item.id
+                   FROM item INNER JOIN feed ON feed.id = item.feed_id
+                  WHERE item.id      = :id
+                    AND feed.user_id = :user)
+        SQL);
+    $deleteQuery->bindValue(':id',   $_GET['id']);
+    $deleteQuery->bindValue(':user', $_SESSION[Key::USER_ID]);
+    if ($deleteQuery->execute()) {
+        add_info('Item deleted');
+    } else {
+        add_error(Data::error($db)['error']);
+    }
+    $db->close();
+    frc_redirect('/');
+}
+
 $query = $db->prepare(<<<'SQL'
     SELECT item.title AS item_title, item.item_link, item.published_on, item.updated_on, item.content,
            feed.title AS feed_title
@@ -61,10 +81,11 @@ page_head(htmlentities("{$item['item_title']} | {$item['feed_title']}")); ?>
 </div>
 <article>
     <div class=item_content><?=str_replace('<a ', '<a target=_blank rel=noopener ', $item['content'])?></div>
-    <form class=action_buttons action=/item method=POST>
+    <form class=action_buttons action=/item method=POST hx-post=/item>
         <input type=hidden name=id value=<?=$_GET['id']?>>
-        <a href="/">Done</a>
+        <a href=/ hx-get="/">Done</a>
         <button type=submit>Keep as New</button>
+        <button type=button hx-delete=/item>Delete</button>
     </form>
 </article><?php
 page_foot();