83 lines
2.0 KiB
JavaScript
83 lines
2.0 KiB
JavaScript
// @ts-check
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import { SUPPORTED_FILE_TYPES } from "./constants.js";
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import crel from "../common/crel.js";
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import * as base64url from "../common/base64url.js";
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import { routeFile } from "./fileRouter.js";
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const accept = SUPPORTED_FILE_TYPES
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.flatMap((t) => [t.mimeType, ...t.extensions])
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.join(",");
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const inputEl = /** @type {HTMLInputElement} */ (
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crel("input", {
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type: "file",
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id: "file-input",
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accept,
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})
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);
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const inputContainerEl = crel("p", {}, inputEl);
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const supportedFileTypeNameString = SUPPORTED_FILE_TYPES
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.map((t, index, array) => (
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(array.length > 1 && (index === array.length - 1))
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? `and ${t.name}`
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: t.name
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))
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.join(", ");
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const labelParagraphEl = crel(
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"p",
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{},
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crel(
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"label",
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{ "for": "file-input" },
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`Upload something! Supports ${supportedFileTypeNameString} files, with more on the way.`,
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),
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);
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const disclaimerParagraphEl = crel(
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"p",
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{},
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crel("small", {}, "Your files do not leave your computer."),
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);
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/**
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* @param {Blob} blob
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* @returns {Promise<string>}
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*/
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const formatBytes = async (blob) => {
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const arrayBuffer = await blob.arrayBuffer();
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const bytes = new Uint8Array(arrayBuffer);
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return base64url.stringify(bytes);
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};
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const main = () => {
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const appEl = document.getElementById("app");
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if (!appEl) throw new Error("HTML is not set up correctly");
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inputEl.addEventListener("change", async () => {
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const file = inputEl.files?.[0];
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if (!file) return;
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// TODO: Prevent large files.
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const route = await routeFile(file);
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if (!route) {
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console.warn(
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"Uploaded a file that was accepted but not routed. This may indicate a bug.",
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);
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// TODO: Show something better than this.
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alert("Unsupported file type.");
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return;
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}
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location.href = route + "#" + JSON.stringify({
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name: file.name,
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bytes: await formatBytes(file),
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});
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});
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appEl.append(labelParagraphEl, inputContainerEl, disclaimerParagraphEl);
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};
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main();
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