tags

src/Database.php

@@ -69,6 +69,20 @@ class Database
             self::$pdo->exec('ALTER TABLE cards ADD COLUMN parent_id INTEGER DEFAULT NULL REFERENCES cards(id) ON DELETE SET NULL');
         }
 
+        if (!in_array('tags', $colNames)) {
+            self::$pdo->exec("ALTER TABLE cards ADD COLUMN tags TEXT NOT NULL DEFAULT ''");
+            // Backfill tags from existing card bodies
+            $all = self::$pdo->query('SELECT id, body FROM cards')->fetchAll();
+            foreach ($all as $row) {
+                preg_match_all('/(?<=\s|^)#([a-zA-Z0-9_\/-][a-zA-Z0-9_\/-]*[a-zA-Z0-9_-]|[a-zA-Z0-9_-]+)/m', $row['body'], $matches);
+                if (!empty($matches[1])) {
+                    $tags = implode(',', array_unique(array_map('strtolower', $matches[1])));
+                    self::$pdo->prepare('UPDATE cards SET tags = :tags WHERE id = :id')
+                        ->execute(['tags' => $tags, 'id' => $row['id']]);
+                }
+            }
+        }
+
         // Bucket color migration
         $bcols = self::$pdo->query('PRAGMA table_info(buckets)')->fetchAll();
         $bcolNames = array_column($bcols, 'name');