rtl-epub-maker/lib/fetchers.ts

83 lines
2.4 KiB
TypeScript

export function makeProgressPercent(e: { total: number, loaded: number}): number {
const { total, loaded } = e;
const progress = (total !== 0)
? Math.floor((loaded / total) * 100)
: 0;
return progress > 0 ? progress : 0;
}
export function bookRequest(req: {
frontmatter: Frontmatter,
content: string,
cover?: File,
}, callback: {
start: (upload: { cancel: () => void }) => void,
progress: (percentage: number) => void,
error: () => void,
}) {
const formData = new FormData();
const xhr = new XMLHttpRequest();
xhr.responseType = "blob";
formData.append("content", req.content);
formData.append("frontmatter", JSON.stringify(req.frontmatter));
if ("cover" in req && req.cover) {
formData.append("file", req.cover);
}
xhr.onload = () => {
const url = window.URL.createObjectURL(xhr.response);
const a = document.createElement('a');
a.href = url;
a.download = `${req.frontmatter.title}.epub`;
document.body.appendChild(a);
a.click();
a.remove();
};
xhr.upload.addEventListener('progress', (e) => {
const progress = makeProgressPercent(e);
callback.progress(progress);
}, false);
xhr.addEventListener('error', (e) => {
console.error(e);
callback.error();
}, false);
xhr.open("POST", "/api/book");
xhr.send(formData);
function cancel() {
xhr.abort();
}
callback.start({ cancel });
}
export function uploadDoc(file: File, callback: {
start: (upload: { cancel: () => void }) => void,
progress: (percentage: number) => void,
error: () => void,
complete: (markdown: string) => void,
}) {
const formData = new FormData();
const xhr = new XMLHttpRequest();
formData.append("file", file);
xhr.onload = () => {
try {
const { markdown } = JSON.parse(xhr.responseText);
callback.complete(markdown);
} catch (e) {
console.error(e);
callback.error();
}
};
xhr.upload.addEventListener('progress', (e) => {
const progress = makeProgressPercent(e);
callback.progress(progress);
}, false);
xhr.addEventListener('error', (e) => {
console.error(e);
callback.error();
}, false);
xhr.open("POST", "/api/file");
xhr.send(formData);
function cancel() {
xhr.abort();
}
callback.start({ cancel });
}