Class Generator

packages/core/src/card.ts:6–222

import { Config, Extension, FetchedData } from "./types";

export class Generator {
    public verbose = false;
    public config: Config = {
        username: "jacoblincool",
        site: "us",
        width: 500,
        height: 200,
        css: [],
        extensions: [],
    };
    public cache?: Cache;
    public headers: Record<string, string>;
    public fetches: Record<string, Promise<FetchedData>> = {};

    constructor(cache?: Cache, headers?: Record<string, string>) {
        this.cache = cache;
        this.headers = headers ?? {};
    }

    async generate(config: Config): Promise<string> {
        const start_time = Date.now();
        this.log("generating card for", config.username, config.site);

        this.config = config;

        const extensions =
            this.config.extensions.map(async (init) => {
                const start = Date.now();
                const ext = await init(this);
                this.log(`extension "${ext.name}" initialized in ${Date.now() - start} ms`);
                return ext;
            }) ?? [];
        const data = (async () => {
            const start = Date.now();
            const data = await this.fetch(config.username, config.site, this.headers);
            this.log(`user data fetched in ${Date.now() - start} ms`, data.profile);
            return data;
        })();
        const body = this.body();

        const result = await this.hydrate(await data, body, await Promise.all(extensions));
        this.log(`card generated in ${Date.now() - start_time} ms`);
        return result;
    }

    protected async fetch(
        username: string,
        site: "us" | "cn",
        headers: Record<string, string>,
    ): Promise<FetchedData> {
        this.log("fetching", username, site);
        const cache_key = `https://leetcode-stats-card.local/data-${username.toLowerCase()}-${site}`;
        console.log("cache_key", cache_key);

        if (cache_key in this.fetches) {
            return this.fetches[cache_key];
        }
        this.fetches[cache_key] = this._fetch(username, site, headers, cache_key);