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

'use strict';

function _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; }

const crossHelpers = require('@graphql-mesh/cross-helpers');
const DataLoader = _interopDefault(require('dataloader'));
const utils = require('@graphql-mesh/utils');

class FileCache {
    constructor({ path, importFn }) {
        this.absolutePath = crossHelpers.path.isAbsolute(path) ? path : crossHelpers.path.join(process.cwd(), path);
        this.json$ = utils.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$;
            await utils.writeJSON(this.absolutePath, json);
            return keys;
        });
    }
    async getKeysByPrefix(prefix) {
        const json = await this.json$;
        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);
    }
}

module.exports = FileCache;