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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.getDefaultTask = getDefaultTask;
const config_js_1 = require("../config.js");
const isUrl_js_1 = require("./isUrl.js");
/**
* We want to make calls to the huggingface hub the least possible, eg if
* someone is calling Inference Endpoints 1000 times per second, we don't want
* to make 1000 calls to the hub to get the task name.
*/
const taskCache = new Map();
const CACHE_DURATION = 10 * 60 * 1000;
const MAX_CACHE_ITEMS = 1000;
/**
* Get the default task. Use a LRU cache of 1000 items with 10 minutes expiration
* to avoid making too many calls to the HF hub.
*
* @returns The default task for the model, or `null` if it was impossible to get it
*/
async function getDefaultTask(model, accessToken, options) {
if ((0, isUrl_js_1.isUrl)(model)) {
return null;
}
const key = `${model}:${accessToken}`;
let cachedTask = taskCache.get(key);
if (cachedTask && cachedTask.date < new Date(Date.now() - CACHE_DURATION)) {
taskCache.delete(key);
cachedTask = undefined;
}
if (cachedTask === undefined) {
const modelTask = await (options?.fetch ?? fetch)(`${config_js_1.HF_HUB_URL}/api/models/${model}?expand[]=pipeline_tag`, {
headers: accessToken ? { Authorization: `Bearer ${accessToken}` } : {},
})
.then((resp) => resp.json())
.then((json) => json.pipeline_tag)
.catch(() => null);
if (!modelTask) {
return null;
}
cachedTask = { task: modelTask, date: new Date() };
taskCache.set(key, { task: modelTask, date: new Date() });
if (taskCache.size > MAX_CACHE_ITEMS) {
// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
taskCache.delete(taskCache.keys().next().value);
}
}
return cachedTask.task;
}
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