117 lines
3.0 KiB
TypeScript
117 lines
3.0 KiB
TypeScript
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import { getFetch, escapeFilename } from './utils'
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export abstract class ScoreInfo {
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private readonly IPNS_KEY = 'QmSdXtvzC8v8iTTZuj5cVmiugnzbR1QATYRcGix4bBsioP';
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private readonly RADIX = 20;
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abstract id: number;
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abstract title: string;
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public store = new Map<symbol, any>();
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get idLastDigit (): number {
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return (+this.id) % this.RADIX
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}
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get fileName (): string {
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return escapeFilename(this.title)
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}
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get msczIpfsRef (): string {
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return `/ipns/${this.IPNS_KEY}/${this.idLastDigit}/${this.id}.mscz`
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}
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get msczCidUrl (): string {
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return `https://ipfs.io/api/v0/block/stat?arg=${this.msczIpfsRef}`
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}
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public msczUrl: string;
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public loadMsczUrl (cidRes: { Key: string; Message: string }): string {
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const cid = cidRes.Key
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if (!cid) {
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// read further error msg
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const err = cidRes.Message
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if (err.includes('no link named')) { // file not found
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throw new Error('score not in dataset')
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} else {
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throw new Error(err)
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}
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}
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this.msczUrl = `https://ipfs.infura.io/ipfs/${cid}`
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return this.msczUrl
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}
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}
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export class ScoreInfoObj extends ScoreInfo {
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constructor (public id: number, public title: string) { super() }
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}
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export class ScoreInfoInPage extends ScoreInfo {
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constructor (private document: Document) { super() }
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get id (): number {
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const el = this.document.querySelector("meta[property='al:ios:url']") as HTMLMetaElement
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const m = el.content.match(/(\d+)$/) as RegExpMatchArray
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return +m[1]
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}
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get title (): string {
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const el = this.document.querySelector("meta[property='og:title']") as HTMLMetaElement
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return el.content
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}
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}
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export class ScoreInfoHtml extends ScoreInfo {
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private readonly ID_REG = /<meta property="al:ios:url" content="musescore:\/\/score\/(\d+)">/
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private readonly TITLE_REG = /<meta property="og:title" content="(.*)">/
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constructor (private html: string) { super() }
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get id (): number {
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const m = this.html.match(this.ID_REG)
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if (!m) return 0
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return +m[1]
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}
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get title (): string {
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const m = this.html.match(this.TITLE_REG)
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if (!m) return ''
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return m[1]
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}
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static async request (url: string, _fetch = getFetch()): Promise<ScoreInfoHtml> {
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const r = await _fetch(url)
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if (!r.ok) return new ScoreInfoHtml('')
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const html = await r.text()
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return new ScoreInfoHtml(html)
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}
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}
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export abstract class SheetInfo {
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abstract pageCount: number;
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abstract thumbnailUrl: string;
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get imgType (): 'svg' | 'png' {
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const thumbnail = this.thumbnailUrl
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const imgtype = thumbnail.match(/score_0\.(\w+)/)![1]
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return imgtype as 'svg' | 'png'
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}
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}
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export class SheetInfoInPage extends SheetInfo {
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constructor (private document: Document) { super() }
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get pageCount (): number {
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return this.document.querySelectorAll('.gXB83').length
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}
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get thumbnailUrl (): string {
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// url to the image of the first page
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const el = this.document.querySelector('link[as=image]') as HTMLLinkElement
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const url = el.href
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return url.split('@')[0]
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}
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}
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