Add search index (#15)

- Add utility rebuild script
- Add Search to header
- Add shell of search page
- Add search query support to ItemList

src/util/search.php

@@ -0,0 +1,49 @@
+<?php
+use JetBrains\PhpStorm\NoReturn;
+
+require __DIR__ . '/../cli-start.php';
+
+cli_title('SEARCH MAINTENANCE');
+
+if ($argc < 2) display_help();
+
+switch ($argv[1]) {
+    case 'rebuild':
+        rebuild_index();
+        break;
+    default:
+        printfn('Unrecognized option "%s"', $argv[1]);
+        display_help();
+}
+
+
+/**
+ * Display the options for this utility and exit
+ */
+#[NoReturn]
+function display_help(): void {
+    printfn('Options:');
+    printfn(' - rebuild');
+    printfn('     Rebuilds search index');
+    exit(0);
+}
+
+/**
+ * Rebuild the search index, creating it if it does not already exist
+ */
+function rebuild_index(): void {
+    $db = Data::getConnection();
+
+    try {
+        $hasIndex = $db->query("SELECT COUNT(*) FROM sqlite_master WHERE name = 'item_ai'");
+        if ($hasIndex->fetchArray(SQLITE3_NUM)[0] == 0) {
+            printfn('Creating search index....');
+            Data::createSearchIndex($db);
+        }
+        printfn('Rebuilding search index...');
+        $db->exec("INSERT INTO item_search (item_search) VALUES ('rebuild')");
+        printfn(PHP_EOL . 'Search index rebuilt');
+    } finally {
+        $db->close();
+    }
+}