First attempt, seems to work

Closes: #1

backup.py

@@ -0,0 +1,79 @@
+"""Backup list of books from Goodreads."""
+
+import configparser
+import os
+from datetime import date
+
+from playwright.sync_api import Page, Playwright, sync_playwright  # type: ignore
+
+import_url = "https://www.goodreads.com/review/import"
+wait_mins = 10
+refresh_backup = False
+
+today = date.today().isoformat()  # current date in ISO format
+
+config = configparser.ConfigParser()
+
+config_file_path = os.path.expanduser(
+    os.path.join(os.getenv("XDG_CONFIG_HOME", "~/.config"), "goodreads", "config")
+)
+assert os.path.exists(config_file_path)
+config.read(os.path.expanduser(config_file_path))
+script_dir = os.path.dirname(os.path.abspath(__file__))
+
+
+def login(page: Page) -> None:
+    """Login to Goodreads."""
+    page.goto("https://www.goodreads.com/")
+    page.get_by_role("link", name="Sign In").click()
+    page.get_by_role("button", name="Sign in with email").click()
+    page.get_by_label("Email").fill(config.get("login", "email"))
+    page.get_by_label("Password").fill(config.get("login", "password"))
+    page.get_by_label("Sign in").click()
+
+
+def navigate_to_import_and_export(page: Page) -> None:
+    """Navigate to import and export."""
+    page.goto("https://www.goodreads.com/")
+    page.get_by_role("link", name="My Books").click()
+    page.get_by_role("link", name="Import and export").click()
+
+
+def run(playwright: Playwright) -> None:
+    """Download export."""
+    browser = playwright.chromium.launch(headless=True)
+    auth_json = os.path.join(script_dir, "auth.json")
+    context = browser.new_context(storage_state=auth_json)
+    page = context.new_page()
+    page.goto(import_url)
+
+    if refresh_backup:
+        print("backup requested")
+        page.get_by_role("button", name="Export Library").click()
+        print(f"waiting for {wait_mins} minutes")
+
+        page.wait_for_timeout(wait_mins * 60 * 1000)
+
+        print("reloading page")
+        page.reload()
+
+    print("download export")
+    export_link = page.get_by_role("link", name="Your export from")
+    print(export_link.text_content())
+    with page.expect_download() as download_info:
+        page.get_by_role("link", name="Your export from").click()
+    download = download_info.value
+    backup_dir = config.get("backup", "dir")
+
+    save_to = os.path.join(backup_dir, f"{today}_goodreads_library_export.csv")
+    download.save_as(save_to)
+    page.close()
+
+    # ---------------------
+    context.storage_state(path=auth_json)
+    context.close()
+    browser.close()
+
+
+with sync_playwright() as playwright:
+    run(playwright)