58 lines
1.5 KiB
TypeScript
58 lines
1.5 KiB
TypeScript
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import { h, VNode } from "preact";
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import { useRef, useState } from "preact/hooks";
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const MAX_IMAGE_UPLOAD_SIZE = 1024 * 1024;
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export interface FileTypeContent {
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content: string;
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type: string;
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name: string;
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}
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interface Props {
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label: string;
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onChange: (v: FileTypeContent | undefined) => void;
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}
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export function FileButton(props: Props): VNode {
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const fileInputRef = useRef<HTMLInputElement>(null);
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const [sizeError, setSizeError] = useState(false);
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return (
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<div>
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<button class="button" onClick={(e) => fileInputRef.current?.click()}>
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<span>{props.label}</span>
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</button>
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<input
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ref={fileInputRef}
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style={{ display: "none" }}
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type="file"
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onChange={(e) => {
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const f: FileList | null = e.currentTarget.files;
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if (!f || f.length != 1) {
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return props.onChange(undefined);
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}
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console.log(f);
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if (f[0].size > MAX_IMAGE_UPLOAD_SIZE) {
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setSizeError(true);
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return props.onChange(undefined);
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}
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setSizeError(false);
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return f[0].arrayBuffer().then((b) => {
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const content = new Uint8Array(b).reduce(
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(data, byte) => data + String.fromCharCode(byte),
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"",
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);
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return props.onChange({
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content,
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name: f[0].name,
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type: f[0].type,
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});
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});
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}}
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/>
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{sizeError && (
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<p class="help is-danger">File should be smaller than 1 MB</p>
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)}
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</div>
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);
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}
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