Add script for populating id-gt from XIVAPI

lib/api/xivapi.js

@@ -0,0 +1,25 @@
+// Escapes any quotation marks in the given string with backslashes.
+const backslashEscapeQuotes = (str) => str
+	.replace(/\\/g, '\\\\') // replace all \ with \\
+	.replace(/"/g, '\\"'); // replace all " with \"
+
+/**
+ * Gets the internal ID of the named item from XIVAPI.
+ * @param {string} name
+ * @returns {Promise<number | null>}
+ */
+export async function findItemGTID (name) {
+	const query = `Name~"${backslashEscapeQuotes(name)}"`;
+	const apiURL = `https://v2.xivapi.com/api/search?${new URLSearchParams({
+		sheets: 'Item',
+		query,
+		fields: 'Name',
+	})}`;
+	const response = await fetch(apiURL);
+	const data = await response.json();
+	if (!response.ok) {
+		throw new Error(`XIVAPI request failed: ${data.code} ${data.message}`);
+	}
+	const item = data.results.find(item => item.fields.Name.toLowerCase() === name.toLowerCase());
+	return item?.row_id ?? null;
+}