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musescore-downloader
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refactor: pdf worker

This commit is contained in:
Xmader 2021-01-27 12:26:32 -05:00
parent 1e3e2d7581
commit f2a52dd514
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GPG Key ID: A20B97FB9EB730E4
1 changed files with 12 additions and 11 deletions
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23
src/worker.ts
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@ -6,7 +6,9 @@ import SVGtoPDF from 'svg-to-pdfkit'
type ImgType = 'svg' | 'png' type ImgType = 'svg' | 'png'
const getDataURL = (blob: Blob): Promise<string> => { type DataResultType = 'dataUrl' | 'text'
const readData = (blob: Blob, type: DataResultType): Promise<string> => {
return new Promise((resolve, reject) => { return new Promise((resolve, reject) => {
const reader = new FileReader() const reader = new FileReader()
reader.onload = (): void => { reader.onload = (): void => {
@ -14,19 +16,18 @@ const getDataURL = (blob: Blob): Promise<string> => {
resolve(result as string) resolve(result as string)
} }
reader.onerror = reject reader.onerror = reject
reader.readAsDataURL(blob) if (type === 'dataUrl') {
reader.readAsDataURL(blob)
} else {
reader.readAsText(blob)
}
}) })
} }
const fetchDataURL = async (imgUrl: string): Promise<string> => { const fetchData = async (imgUrl: string, type: DataResultType): Promise<string> => {
const r = await fetch(imgUrl) const r = await fetch(imgUrl)
const blob = await r.blob() const blob = await r.blob()
return getDataURL(blob) return readData(blob, type)
}
const fetchText = async (imgUrl: string): Promise<string> => {
const r = await fetch(imgUrl)
return r.text()
} }
const generatePDF = async (imgURLs: string[], imgType: ImgType, width: number, height: number): Promise<ArrayBuffer> => { const generatePDF = async (imgURLs: string[], imgType: ImgType, width: number, height: number): Promise<ArrayBuffer> => {
@ -40,7 +41,7 @@ const generatePDF = async (imgURLs: string[], imgType: ImgType, width: number, h
}) })
if (imgType === 'png') { if (imgType === 'png') {
const imgDataUrlList: string[] = await Promise.all(imgURLs.map(fetchDataURL)) const imgDataUrlList: string[] = await Promise.all(imgURLs.map(url => fetchData(url, 'dataUrl')))
imgDataUrlList.forEach((data) => { imgDataUrlList.forEach((data) => {
pdf.addPage() pdf.addPage()
@ -50,7 +51,7 @@ const generatePDF = async (imgURLs: string[], imgType: ImgType, width: number, h
}) })
}) })
} else { // imgType == "svg" } else { // imgType == "svg"
const svgList = await Promise.all(imgURLs.map(fetchText)) const svgList = await Promise.all(imgURLs.map(url => fetchData(url, 'text')))
svgList.forEach((svg) => { svgList.forEach((svg) => {
pdf.addPage() pdf.addPage()