Name downloaded books with a template

The new "Book Downloads" group in Settings holds a Calibre template for the file name of a
direct download. Without a template, the name stays the title. The name is also the title if
the template fails or gives no name for a book.

tests/js/admin.test.mjs

@@ -9,7 +9,7 @@ test('a user who is not an admin gets no settings link and no settings page', as
   t.after(stopPolling);
   const backend = server(t);
   backend.on('GET', 'auth/check', { authenticated: true, mode: 'proxy', user: 'bob', admin: false });
-  backend.on('GET', 'config', { metadata_fields: {}, mode_labels: {}, library_available: false });
+  backend.on('GET', 'config', { metadata_fields: {}, mode_labels: {}, library_available: false, download_fields: {} });
   backend.on('GET', 'jobs', []);
   backend.on('GET', 'stories', []);
   await import('../../bindery/static/js/main.js');

tests/js/auth-flows.test.mjs

@@ -11,7 +11,7 @@ test('login retry, navigation, session expiry and logout preserve the authentica
   const backend = server(t);
   let auth = { authenticated: false, mode: 'cwa', user: null };
   backend.on('GET', 'auth/check', () => auth);
-  backend.on('GET', 'config', { metadata_fields: {}, mode_labels: {}, library_available: false });
+  backend.on('GET', 'config', { metadata_fields: {}, mode_labels: {}, library_available: false, download_fields: {} });
   backend.on('GET', 'jobs', []);
   backend.on('GET', 'stories', []);
   backend.on('GET', 'rules', { rules: [], paragraphs: false });

tests/js/flows.test.mjs

@@ -16,6 +16,7 @@ const config = {
   metadata_fields: { title: 'Title', authors: 'Authors', comments: 'Description', series: 'Series', pubdate: 'Published', tags: 'Tags', languages: 'Language' },
   mode_labels: { new: 'New chapters' }, library_available: true, cwa_enabled: true, update_interval: 2,
   job_list_max_hours: 720, job_list_max_count: 500,
+  download_fields: { title: 'The title', id: 'The story ID' },
 };
 const rule = { pattern: 'before', replacement: 'after', flags: 'i', note: '', enabled: true };
 const emptyRules = { rules: [], paragraphs: null, global_paragraphs: true };
@@ -108,6 +109,26 @@ test('the jobs list settings load and save all four fields', async () => {
   assert.match(ui.toasts.textContent, /Saved/);
 });
 
+test('the download template loads, lists its fields, and saves the stored form', async () => {
+  api.on('GET', 'settings', { recent_chapters: 0, personal_ini: '', download_template: '{title}' });
+  settingsPage(main, {}, config);
+  await settle();
+  const card = section(main, 'Book Downloads');
+  assert.equal(field(main, 'download-template').value, '{title}');
+  assert.ok(find(card, 'code', '{id}'));
+  assert.match(card.textContent, /\{title\}The title\{id\}The story ID/);
+  field(main, 'download-template').value = ' {title} - {authors} ';
+  api.on('PUT', 'settings', { download_template: '{title} - {authors}' });
+  await click(card, 'Save');
+  assert.deepEqual(api.sent('PUT', 'settings')[0].body, { download_template: ' {title} - {authors} ' });
+  assert.equal(field(main, 'download-template').value, '{title} - {authors}');
+  api.on('PUT', 'settings', { error: 'Bindery does not support template functions' }, 400);
+  field(main, 'download-template').value = '{title:uppercase()}';
+  await click(card, 'Save');
+  assert.equal(field(main, 'download-template').value, '{title:uppercase()}');
+  assert.match(ui.toasts.textContent, /does not support template functions/);
+});
+
 test('adding stories keeps input on rejection and clears it after a mixed result', async () => {
   await mountStories({ ...config, library_available: false });
   const urls = nodes(main).find((el) => el.tagName === 'textarea');

tests/js/frontend.test.mjs

@@ -48,6 +48,7 @@ const settle = () => new Promise((resolve) => setImmediate(resolve));
 const config = {
   metadata_fields: { title: 'Title' }, mode_labels: {}, library_available: true, cwa_enabled: true, update_interval: 0,
   job_list_max_hours: 720, job_list_max_count: 500,
+  download_fields: { title: 'The title', id: 'The story ID' },
 };
 const story = {
   id: 1, title: 'Story', author: 'Author', url: 'https://example.com/story', site: 'example.com',

tests/js/local-auth.test.mjs

@@ -11,7 +11,7 @@ test('local login, retry, session expiry and logout use the existing form', asyn
   const backend = server(t);
   let auth = { authenticated: false, mode: 'local', user: null };
   backend.on('GET', 'auth/check', () => auth);
-  backend.on('GET', 'config', { metadata_fields: {}, mode_labels: {}, library_available: false });
+  backend.on('GET', 'config', { metadata_fields: {}, mode_labels: {}, library_available: false, download_fields: {} });
   backend.on('GET', 'stories', []);
   backend.on('GET', 'jobs', []);
   backend.on('GET', 'expired', { error: 'Session ended' }, 401);

tests/js/proxy-reload.test.mjs

@@ -15,7 +15,7 @@ test('a 401 while logged in through the proxy reloads the page', async (t) => {
   });
   const backend = server(t);
   backend.on('GET', 'auth/check', { authenticated: true, mode: 'proxy', user: 'alice' });
-  backend.on('GET', 'config', { metadata_fields: {}, mode_labels: {}, library_available: false });
+  backend.on('GET', 'config', { metadata_fields: {}, mode_labels: {}, library_available: false, download_fields: {} });
   backend.on('GET', 'jobs', []);
   backend.on('GET', 'stories', []);
   backend.on('GET', 'expired', { error: 'Session ended' }, 401);

tests/js/story-tab.test.mjs

@@ -31,7 +31,7 @@ test('an open story has a tab with its title, also on its chapter pages', async
   t.after(stopPolling);
   const backend = server(t);
   backend.on('GET', 'auth/check', { authenticated: true, mode: 'none', user: '' });
-  backend.on('GET', 'config', { metadata_fields: {}, mode_labels: {}, library_available: false });
+  backend.on('GET', 'config', { metadata_fields: {}, mode_labels: {}, library_available: false, download_fields: {} });
   backend.on('GET', 'jobs', []);
   backend.on('GET', 'stories', []);
   backend.on('GET', 'settings', { recent_chapters: 0, personal_ini: '' });

tests/js/upload-hold.test.mjs

@@ -7,7 +7,7 @@ const { settingsPage } = await import('../../bindery/static/js/settings.js');
 const { storyPage } = await import('../../bindery/static/js/story.js');
 const { storiesPage } = await import('../../bindery/static/js/stories.js');
 
-const config = { cwa_enabled: true, job_list_max_hours: 720, job_list_max_count: 500 };
+const config = { cwa_enabled: true, job_list_max_hours: 720, job_list_max_count: 500, download_fields: {} };
 const book = { id: 7, uuid: 'book-7', title: 'Library Title', authors: ['Writer'] };
 const details = (story, extra = {}) => ({
   story: { id: 1, title: 'Story', author: 'Writer', url: 'https://example.com/story', site: 'example.com',