1  /**
 2   * Pixiv shared helpers: authenticated Ajax fetch with standard error handling.
 3   *
 4   * All Pixiv Ajax APIs return `{ error: false, body: ... }` on success.
 5   * On failure the HTTP status code is used to distinguish auth (401/403),
 6   * not-found (404), and other errors.
 7   */
 8  import { AuthRequiredError, CommandExecutionError } from '@jackwener/opencli/errors';
 9  const PIXIV_DOMAIN = 'www.pixiv.net';
10  /**
11   * Navigate to Pixiv (to attach cookies) then fetch a Pixiv Ajax API endpoint.
12   *
13   * Handles the common navigate → evaluate(fetch) → error-check pattern used
14   * by every Pixiv TS adapter.
15   *
16   * @param page  - Browser page instance
17   * @param path  - API path, e.g. '/ajax/illust/12345'
18   * @param opts  - Optional query params
19   * @returns     - The parsed `body` from the JSON response
20   * @throws AuthRequiredError on 401/403
21   * @throws CommandExecutionError on 404 or other HTTP errors
22   */
23  export async function pixivFetch(page, path, opts = {}) {
24      await page.goto(`https://${PIXIV_DOMAIN}`);
25      const qs = opts.params
26          ? '?' + Object.entries(opts.params).map(([k, v]) => `${k}=${encodeURIComponent(v)}`).join('&')
27          : '';
28      const url = `https://${PIXIV_DOMAIN}${path}${qs}`;
29      const data = await page.evaluate(`
30      (async () => {
31        const res = await fetch(${JSON.stringify(url)}, { credentials: 'include' });
32        if (!res.ok) return { __httpError: res.status };
33        return await res.json();
34      })()
35    `);
36      if (data?.__httpError) {
37          const status = data.__httpError;
38          if (status === 401 || status === 403) {
39              throw new AuthRequiredError(PIXIV_DOMAIN, 'Authentication required — please log in to Pixiv in Chrome');
40          }
41          if (status === 404) {
42              throw new CommandExecutionError(opts.notFoundMsg || `Pixiv resource not found (HTTP 404)`);
43          }
44          throw new CommandExecutionError(`Pixiv request failed (HTTP ${status})`);
45      }
46      return data?.body;
47  }
48  /** Maximum number of illust IDs per batch detail request (Pixiv server limit). */
49  export const BATCH_SIZE = 48;