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/* eslint-disable no-extend-native */
/* eslint-disable @typescript-eslint/no-unsafe-return */
import md5 from "md5";
import { getFetch } from "./utils";
import { auths } from "./file-magics";
export type FileType = "img" | "mp3" | "midi";
const getSuffix = async (scoreUrl: string): Promise<string> => {
let suffixUrl;
if (scoreUrl !== "") {
suffixUrl = (await (await fetch(scoreUrl)).text()).match(
'<link href="(https://musescore.com/static/public/build/musescore.*?(?:_es6)?/20.+?.js)"'
)?.[1]!;
} else {
const suffixElement =
(document.head.querySelector(
"link[href^='https://musescore.com/static/public/build/musescore_es6/20']"
) as HTMLLinkElement) ??
(document.head.querySelector(
"link[href^='https://musescore.com/static/public/build/musescore/20']"
) as HTMLLinkElement) ??
(document.head.querySelector(
"link[href^='https://musescore.com/static/public/build/musescore_fonts_es6/20']"
) as HTMLLinkElement) ??
(document.head.querySelector(
"link[href^='https://musescore.com/static/public/build/musescore_fonts/20']"
) as HTMLLinkElement) ??
(document.head.querySelector(
"link[href^='https://musescore.com/static/public/build/musescore_offwhite_colours_es6/20']"
) as HTMLLinkElement) ??
(document.head.querySelector(
"link[href^='https://musescore.com/static/public/build/musescore_offwhite_colours/20']"
) as HTMLLinkElement);
suffixUrl = suffixElement?.href;
}
const suffixJs = await fetch(suffixUrl);
return (await suffixJs.text()).match(
'(?:.*)"(.+)"\\)\\.substr\\(0,4\\)'
)?.[1]!;
};
const getApiUrl = (id: number, type: FileType, index: number): string => {
return `/api/jmuse?id=${id}&type=${type}&index=${index}`;
};
const getApiAuth = async (
id: number,
type: FileType,
index: number,
scoreUrl: string
): Promise<string> => {
const code = `${id}${type}${index}${await getSuffix(scoreUrl)}`;
return md5(code).slice(0, 4);
};
let imgInProgress = false;
const getApiAuthNetwork = async (
type: FileType,
index: number
): Promise<string> => {
let numPages = 0;
let pageCooldown = 25;
if (!auths[type + index]) {
try {
switch (type) {
case "midi": {
const fsBtn = document.querySelector(
'button[title="Toggle Fullscreen"]'
) as HTMLButtonElement;
if (!fsBtn) {
throw Error;
}
const el =
fsBtn.parentElement?.parentElement?.querySelector(
"button"
) as HTMLButtonElement;
el.click();
break;
}
case "mp3": {
const el = document.querySelector(
'button[title="Toggle Play"]'
) as HTMLButtonElement;
el.click();
break;
}
case "img": {
if (!imgInProgress) {
imgInProgress = true;
let parentDiv = document.querySelector(
"#jmuse-scroller-component"
)!;
numPages = parentDiv.children.length - 3;
let i = 0;
function scrollToNextChild() {
let childDiv = parentDiv.children[i];
if (childDiv) {
childDiv.scrollIntoView();
}
i++;
if (i < numPages) {
setTimeout(scrollToNextChild, pageCooldown);
}
}
scrollToNextChild();
}
imgInProgress = false;
break;
}
}
} catch (err) {
console.error(err);
throw Error;
}
}
try {
return new Promise((resolve, reject) => {
let timer = setTimeout(
() => {
reject(new Error("token timeout"));
},
type === "img"
? numPages * pageCooldown * 2 + 2100
: 5 * 1000 /* 5s */
);
// Check the auths object periodically
let interval = setInterval(() => {
if (auths.hasOwnProperty(type + index)) {
clearTimeout(timer);
clearInterval(interval);
setInterval(
() => {
resolve(auths[type + index]);
},
// long delay for images to give time for them to load fully
type === "img" ? 2000 : 100
);
}
}, 100);
});
} catch {
console.error(type, "token timeout");
throw Error;
}
};
export const getFileUrl = async (
id: number,
type: FileType,
scoreUrl = "",
index = 0,
_fetch = getFetch()
): Promise<string> => {
const url = getApiUrl(id, type, index);
let auth = await getApiAuth(id, type, index, scoreUrl);
let r = await _fetch(url, {
headers: {
Authorization: auth,
},
});
if (!r.ok) {
auth = md5(`${id}${type}${index}01000`).slice(0, 4);
r = await _fetch(url, {
headers: {
Authorization: auth,
},
});
if (!r.ok) {
auth = await getApiAuthNetwork(type, index);
if (type === "img" && index === 0) {
// auth is the URL for the first page
r = await _fetch(auth);
} else {
r = await _fetch(url, {
headers: {
Authorization: auth,
},
});
}
}
}
const { info } = await r.json();
return info.url as string;
};
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