pack-drawings.js #pdf #nodejs

pack-drawings.js

const fs = require('fs')
const PDFLib = require('pdf-lib')
const filepath = './220812_竣工図/220812_AUO_竣工図整理.pdf'
const PDFDocument = PDFLib.PDFDocument
const productionDwgFilePaths = [
    '../08_issued/SETUP/220713/220713_SDR-2_commented.pdf',
    '../08_issued/SETUP/220714/220714_F4-3_commented.pdf',
    '../08_issued/SETUP/220722/220722_AUO_元赤坂建具図_0721_commented.pdf',
]

const run = async function() {

    const pdfData = fs.readFileSync(filepath)
    const srcDoc = await PDFDocument.load(pdfData)

    // Load drawing files
    const productionDwgDocs = await Promise.all((productionDwgFilePaths.map(async (filepath) => {
        return await PDFDocument.load(fs.readFileSync(filepath))
    })))

    // Load pages
    const productionDwgPages = await Promise.all(productionDwgDocs.map(async (doc) => {
        let indices = Array.from(Array(doc.getPages().length).keys())
        return await srcDoc.copyPages(doc, indices)
    }))

    // Insert pages
    productionDwgPages.flat().forEach((p) => {
        srcDoc.insertPage(srcDoc.getPages().length, p)
    })

    // Grab binary 
    const pdfBytes = await srcDoc.save()

    // Write it out
    fs.writeFile(filepath.replace(/\.pdf$/, '_packed.pdf'), pdfBytes, (err) => {
        err && console.log(err)
    })
}

run();