@graphql-mesh/cache-file/index.mjs

import { path } from '@graphql-mesh/cross-helpers';
import DataLoader from 'dataloader';
import { pathExists, writeJSON } from '@graphql-mesh/utils';

class FileCache {
    constructor({ path: path$1, importFn }) {
        this.absolutePath = path.isAbsolute(path$1) ? path$1 : path.join(process.cwd(), path$1);
        this.json$ = pathExists(this.absolutePath).then(async (isExists) => {
            if (isExists) {
                const existingData = await importFn(this.absolutePath);
                return {
                    ...existingData,
                };
            }
            return {};
        });
        this.writeDataLoader = new DataLoader(async (keys) => {
            const json = await this.json$;
            await writeJSON(this.absolutePath, json);
            return keys;
        });
    }
    async getKeysByPrefix(prefix) {
        const json = await this.json$;
        return Object.keys(json).filter(key => key.startsWith(prefix));
    }
    async get(name) {
        const json = await this.json$;
        return json[name];
    }
    async set(name, value) {
        const json = await this.json$;
        json[name] = value;
        await this.writeDataLoader.load(name);
    }
    async delete(name) {
        const json = await this.json$;
        delete json[name];
        await this.writeDataLoader.load(name);
    }
}

export default FileCache;