50 lines
1.5 KiB
JavaScript
50 lines
1.5 KiB
JavaScript
import probeImageSize from "probe-image-size";
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import { Mutex } from "redis-semaphore";
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import { FILE_TYPE_BROWSERSAFE } from "../const.js";
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import Logger from "../services/logger.js";
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import { Cache } from "./cache.js";
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import { redisClient } from "../db/redis.js";
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const cache = new Cache("emojiMeta", 60 * 10); // once every 10 minutes for the same url
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const logger = new Logger("emoji");
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export async function getEmojiSize(url) {
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let attempted = true;
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const lock = new Mutex(redisClient, "getEmojiSize");
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await lock.acquire();
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try {
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attempted = await cache.get(url) === true;
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if (!attempted) {
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await cache.set(url, true);
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}
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} finally{
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await lock.release();
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}
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if (attempted) {
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logger.warn(`Attempt limit exceeded: ${url}`);
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throw new Error("Too many attempts");
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}
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try {
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logger.debug(`Retrieving emoji size from ${url}`);
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const { width, height, mime } = await probeImageSize(url, {
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timeout: 5000
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});
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if (!(mime.startsWith("image/") && FILE_TYPE_BROWSERSAFE.includes(mime))) {
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throw new Error("Unsupported image type");
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}
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return {
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width,
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height
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};
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} catch (e) {
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throw new Error(`Unable to retrieve metadata: ${e}`);
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}
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}
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export function getNormalSize({ width, height }, orientation) {
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return (orientation || 0) >= 5 ? {
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width: height,
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height: width
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} : {
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width,
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height
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};
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}
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