List unread items on home page (#6)

- Fix feed update (latent bug on #4)

src/public/index.php

@@ -9,6 +9,35 @@ include '../start.php';
 
 Security::verifyUser();
 
+$db     = Data::getConnection();
+$result = $db->query(<<<'SQL'
+    SELECT item.id, item.title AS item_title, coalesce(item.updated_on, item.published_on) AS as_of,
+           feed.title AS feed_title
+      FROM item
+           INNER JOIN feed ON feed.id = item.feed_id
+     WHERE item.is_read = 0
+     ORDER BY coalesce(item.updated_on, item.published_on) DESC
+    SQL);
+$item   = $result ? $result->fetchArray(SQLITE3_ASSOC) : false;
+
 page_head('Welcome'); ?>
-<p>Unread items go here</p><?php
+<h1>Your Unread Items</h1>
+<article><?php
+if ($item) {
+    while ($item) {
+        try {
+            $asOf = (new DateTimeImmutable($item['as_of']))->format(DATE_TIME_FORMAT);
+        } catch (Exception) {
+            $asOf = '(invalid date)';
+        } ?>
+        <p><a href=/item/view?id=<?=$item['id']?>><?=htmlentities($item['item_title'])?></a><br>
+            <?=htmlentities($item['feed_title'])?><br><small><em><?=$asOf?></em></small><?php
+        $item = $result->fetchArray(SQLITE3_ASSOC);
+    }
+} else { ?>
+    <p>There are no unread items</p><?php
+} ?>
+</article><?php
+
 page_foot();
+$db->close();