scripts/merge-to-pdf.ts
3.2 KB| 1 | import { existsSync, readdirSync, readFileSync } from "fs"; |
| 2 | import { join, basename } from "path"; |
| 3 | import { PDFDocument } from "pdf-lib"; |
| 4 | |
| 5 | interface PageInfo { |
| 6 | filename: string; |
| 7 | path: string; |
| 8 | index: number; |
| 9 | promptPath?: string; |
| 10 | } |
| 11 | |
| 12 | function parseArgs(): { dir: string; output?: string } { |
| 13 | const args = process.argv.slice(2); |
| 14 | let dir = ""; |
| 15 | let output: string | undefined; |
| 16 | |
| 17 | for (let i = 0; i < args.length; i++) { |
| 18 | if (args[i] === "--output" || args[i] === "-o") { |
| 19 | output = args[++i]; |
| 20 | } else if (!args[i].startsWith("-")) { |
| 21 | dir = args[i]; |
| 22 | } |
| 23 | } |
| 24 | |
| 25 | if (!dir) { |
| 26 | console.error("Usage: bun merge-to-pdf.ts <comic-dir> [--output filename.pdf]"); |
| 27 | process.exit(1); |
| 28 | } |
| 29 | |
| 30 | return { dir, output }; |
| 31 | } |
| 32 | |
| 33 | function findComicPages(dir: string): PageInfo[] { |
| 34 | if (!existsSync(dir)) { |
| 35 | console.error(`Directory not found: ${dir}`); |
| 36 | process.exit(1); |
| 37 | } |
| 38 | |
| 39 | const files = readdirSync(dir); |
| 40 | const pagePattern = /^(\d+)-(cover|page)(-[\w-]+)?\.(png|jpg|jpeg)$/i; |
| 41 | const promptsDir = join(dir, "prompts"); |
| 42 | const hasPrompts = existsSync(promptsDir); |
| 43 | |
| 44 | const pages: PageInfo[] = files |
| 45 | .filter((f) => pagePattern.test(f)) |
| 46 | .map((f) => { |
| 47 | const match = f.match(pagePattern); |
| 48 | const baseName = f.replace(/\.(png|jpg|jpeg)$/i, ""); |
| 49 | const promptPath = hasPrompts ? join(promptsDir, `${baseName}.md`) : undefined; |
| 50 | |
| 51 | return { |
| 52 | filename: f, |
| 53 | path: join(dir, f), |
| 54 | index: parseInt(match![1], 10), |
| 55 | promptPath: promptPath && existsSync(promptPath) ? promptPath : undefined, |
| 56 | }; |
| 57 | }) |
| 58 | .sort((a, b) => a.index - b.index); |
| 59 | |
| 60 | if (pages.length === 0) { |
| 61 | console.error(`No comic pages found in: ${dir}`); |
| 62 | console.error("Expected format: 00-cover-slug.png, 01-page-slug.png, etc."); |
| 63 | process.exit(1); |
| 64 | } |
| 65 | |
| 66 | return pages; |
| 67 | } |
| 68 | |
| 69 | async function createPdf(pages: PageInfo[], outputPath: string) { |
| 70 | const pdfDoc = await PDFDocument.create(); |
| 71 | pdfDoc.setAuthor("baoyu-comic"); |
| 72 | pdfDoc.setSubject("Generated Comic"); |
| 73 | |
| 74 | for (const page of pages) { |
| 75 | const imageData = readFileSync(page.path); |
| 76 | const ext = page.filename.toLowerCase(); |
| 77 | const image = ext.endsWith(".png") |
| 78 | ? await pdfDoc.embedPng(imageData) |
| 79 | : await pdfDoc.embedJpg(imageData); |
| 80 | |
| 81 | const { width, height } = image; |
| 82 | const pdfPage = pdfDoc.addPage([width, height]); |
| 83 | |
| 84 | pdfPage.drawImage(image, { |
| 85 | x: 0, |
| 86 | y: 0, |
| 87 | width, |
| 88 | height, |
| 89 | }); |
| 90 | |
| 91 | console.log(`Added: ${page.filename}${page.promptPath ? " (prompt available)" : ""}`); |
| 92 | } |
| 93 | |
| 94 | const pdfBytes = await pdfDoc.save(); |
| 95 | await Bun.write(outputPath, pdfBytes); |
| 96 | |
| 97 | console.log(`\nCreated: ${outputPath}`); |
| 98 | console.log(`Total pages: ${pages.length}`); |
| 99 | } |
| 100 | |
| 101 | async function main() { |
| 102 | const { dir, output } = parseArgs(); |
| 103 | const pages = findComicPages(dir); |
| 104 | |
| 105 | const dirName = basename(dir) === "comic" ? basename(join(dir, "..")) : basename(dir); |
| 106 | const outputPath = output || join(dir, `${dirName}.pdf`); |
| 107 | |
| 108 | console.log(`Found ${pages.length} pages in: ${dir}\n`); |
| 109 | |
| 110 | await createPdf(pages, outputPath); |
| 111 | } |
| 112 | |
| 113 | main().catch((err) => { |
| 114 | console.error("Error:", err.message); |
| 115 | process.exit(1); |
| 116 | }); |
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