| export const makeComicBook = async ({ entries, loadBlob, getSize, getComment }, file) => { |
| const cache = new Map() |
| const urls = new Map() |
| const load = async name => { |
| if (cache.has(name)) return cache.get(name) |
| const src = URL.createObjectURL(await loadBlob(name)) |
| const page = URL.createObjectURL( |
| new Blob([`<!DOCTYPE html><html><head><meta charset="utf-8"></head><body style="margin: 0"><img src="${src}"></body></html>`], { type: 'text/html' })) |
| urls.set(name, [src, page]) |
| cache.set(name, page) |
| return page |
| } |
| const unload = name => { |
| urls.get(name)?.forEach?.(url => URL.revokeObjectURL(url)) |
| urls.delete(name) |
| cache.delete(name) |
| } |
|
|
| const exts = ['.jpg', '.jpeg', '.png', '.gif', '.bmp', '.webp', '.svg', '.jxl', '.avif'] |
| const files = entries |
| .map(entry => entry.filename) |
| .filter(name => exts.some(ext => name.endsWith(ext))) |
| .sort() |
| if (!files.length) throw new Error('No supported image files in archive') |
|
|
| const book = {} |
| try { |
| const jsonComment = JSON.parse(await getComment() || '') |
| const info = jsonComment['ComicBookInfo/1.0'] |
| if (info) { |
| const year = info.publicationYear |
| const month = info.publicationMonth |
| const mm = month && month >= 1 && month <= 12 ? String(month).padStart(2, '0') : null |
| book.metadata = { |
| title: info.title || file.name, |
| publisher: info.publisher, |
| language: info.language || info.lang, |
| author: info.credits ? info.credits.map(c => `${c.person} (${c.role})`).join(', ') : '', |
| published: year && month ? `${year}-${mm}` : undefined, |
| } |
| } else { |
| book.metadata = { title: file.name } |
| } |
| } catch { |
| book.metadata = { title: file.name } |
| } |
| book.getCover = () => loadBlob(files[0]) |
| book.sections = files.map(name => ({ |
| id: name, |
| load: () => load(name), |
| unload: () => unload(name), |
| size: getSize(name), |
| })) |
| book.toc = files.map(name => ({ label: name, href: name })) |
| book.rendition = { layout: 'pre-paginated' } |
| book.resolveHref = href => ({ index: book.sections.findIndex(s => s.id === href) }) |
| book.splitTOCHref = href => [href, null] |
| book.getTOCFragment = doc => doc.documentElement |
| book.destroy = () => { |
| for (const arr of urls.values()) |
| for (const url of arr) URL.revokeObjectURL(url) |
| } |
| return book |
| } |
|
|
