Add item bookmark buttons (#14)

Implemented as a toggle button

- Move init_cap func where web can see it
- Bump version to alpha7

src/public/assets/style.css

@@ -79,10 +79,6 @@ main {
         margin-top: .25rem;
     }
 
-    .item_heading {
-        margin-bottom: 0;
-    }
-
     .item_published {
         margin-bottom: 1rem;
         line-height: 1.2;
@@ -153,3 +149,31 @@ code {
 p.back-link {
     margin-top: -1rem;
 }
+.item_heading {
+    margin-bottom: 0;
+
+    .bookmark {
+        padding: 0;
+        border: solid 1px black;
+        border-radius: .5rem;
+
+        &.add {
+            background-color: lightgray;
+            :hover {
+                background: linear-gradient(lightgreen, gray);
+            }
+        }
+        &.remove {
+            background: linear-gradient(lightgreen, green);
+            :hover {
+                background: linear-gradient(gray, lightgreen);
+            }
+        }
+
+        img {
+            max-width: 1.5rem;
+            max-height: 1.5rem;
+            padding: .5rem;
+        }
+    }
+}

src/public/bookmark.php

@@ -0,0 +1,49 @@
+<?php
+
+/**
+ * Bookmark Partial Handler
+ *
+ * This will display a button which will either add or remove a bookmark for a given item.
+ */
+
+include '../start.php';
+
+$db = Data::getConnection();
+Security::verifyUser($db);
+
+$id = $_GET['id'];
+
+$existsQuery = $db->prepare(
+    'SELECT item.id FROM item INNER JOIN feed ON feed.id = item.feed_id WHERE item.id = :id AND feed.user_id = :user');
+$existsQuery->bindValue(':id',   $id);
+$existsQuery->bindValue(':user', $_SESSION[Key::USER_ID]);
+$existsResult = $existsQuery->execute();
+$exists = $existsResult ? $existsResult->fetchArray(SQLITE3_ASSOC) : false;
+
+if (!$exists) not_found();
+
+if (key_exists('action', $_GET)) {
+    if ($_GET['action'] == 'add') {
+        $flag = 1;
+    } elseif ($_GET['action'] == 'remove') {
+        $flag = 0;
+    }
+    if (isset($flag)) {
+        $update = $db->prepare('UPDATE item SET is_bookmarked = :flag WHERE id = :id');
+        $update->bindValue(':id',   $id);
+        $update->bindValue(':flag', $flag);
+        if (!$update->execute()) die(Data::error($db)['error']);
+    }
+}
+
+$bookQuery = $db->prepare('SELECT id, is_bookmarked FROM item WHERE id = :id');
+$bookQuery->bindValue(':id', $id);
+$bookResult = $bookQuery->execute();
+$bookmark = $bookResult ? $bookResult->fetchArray(SQLITE3_ASSOC) : ['id' => $id, 'is_bookmarked' => 0];
+
+$action = $bookmark['is_bookmarked'] ? 'remove' : 'add';
+$icon   = $bookmark['is_bookmarked'] ? 'added'  : 'add'; ?>
+<button class="bookmark <?=$action?>" type=button role=button hx-patch="/bookmark?id=<?=$id?>&action=<?=$action?>"
+        hx-target=this hx-swap=outerHTML hx-push-url=false title="<?=init_cap($action)?> Bookmark">
+    <img src=/assets/bookmark-<?=$icon?>.png alt="<?=$action?> bookmark">
+</button><?php

src/public/feed/items.php

@@ -67,6 +67,7 @@ if ($type == TYPE_ALL) { ?>
         while ($item) { ?>
             <p><?=hx_get("/item?id={$item['id']}&from=$thisURL", strip_tags($item['title']))?><br>
                 <small><?=$item['is_read'] == 0 ? '<strong>New</strong> &nbsp; ' : ''?>
+                    <?=$item['is_bookmarked'] ? '<strong>Bookmarked</strong> &nbsp; ' : ''?>
                     <em><?=date_time($item['as_of'])?></em></small><?php
             $item = $itemResult->fetchArray(SQLITE3_ASSOC);
         }

src/public/item.php

@@ -75,6 +75,8 @@ $updated   = isset($item['updated_on']) ? date_time($item['updated_on']) : null;
 
 page_head(htmlentities("{$item['item_title']} | {$item['feed_title']}")); ?>
 <h1 class=item_heading>
+    <span class=bookmark hx-get="/bookmark?id=<?=$_GET['id']?>" hx-trigger=load hx-target=this hx-swap=outerHTML
+          hx-push-url=false></span>
     <a href="<?=$item['item_link']?>" target=_blank rel=noopener><?=strip_tags($item['item_title'])?></a><br>
 </h1>
 <div class=item_published>