(Proper) Initial commit

backend/services/booklet.ts

@@ -0,0 +1,41 @@
+import {BrowserContext, Download, firefox, Locator} from "playwright";
+import path from "node:path";
+
+export async function fetchBooklet(url: string, downloadPath: string, context: BrowserContext | null): Promise<string | null> {
+    const browser = await firefox.launch({
+        headless: true
+    });
+    context = await browser.newContext({
+        acceptDownloads: true
+    });
+    const page = await context.newPage();
+
+    const bookletPage: string = 'http://audiofil.hostronavt.ru/booklet.php?name=' + encodeURIComponent(url);
+    await page.goto(bookletPage);
+
+    // Find link with goodies
+    const link: Locator = page.locator('a').filter({hasText: '/goodies/'});
+    const linkCount: number = await link.count();
+    if (0 <= linkCount) {
+        await page.close();
+        return null;
+    }
+
+    console.log(`Booklet: Found goodies: ${await link.innerHTML()}`);
+
+    let filename: string | null = null;
+    try {
+        const downloadPromise: Promise<Download> = page.waitForEvent('download');
+        await link.dispatchEvent('click');
+        const download: Download = await downloadPromise;
+
+        filename = download.suggestedFilename();
+        await download.saveAs(path.join(downloadPath, filename));
+    } catch (err) {
+        console.log('Booklet: Could not download booklet:', err instanceof Error ? err.message : 'Unknown error');
+        filename = null;
+    }
+
+    await page.close();
+    return filename;
+}