@platform/react.ssr/lib/config.mjs

A lightweight SSR (server-side-rendering) system for react apps bundled with ParcelJS and hosted on S3.

import { defaultValue, fs, semver, util } from './common';
import { Manifest } from './manifest';
const { stripSlashes } = util;
const DEFAULT = {
    FILE: 'ssr.yml',
};
const ERROR = {
    noFile: (path) => `An "${DEFAULT.FILE}" configuration file does not exist at: ${path}`,
};
export class Config {
    constructor(args) {
        this.def = args.def;
    }
    get secret() {
        return toValue(this.def.secret);
    }
    get builder() {
        const builder = this.def.builder || {};
        builder.bundles = builder.bundles || 'bundles';
        builder.entries = builder.entries || '';
        return builder;
    }
    get s3() {
        const s3 = this.def.s3 || {};
        const path = s3.path || {};
        const endpoint = util.stripHttp(s3.endpoint || '');
        const cdn = util.stripHttp(s3.cdn || '');
        const accessKey = toValue(s3.accessKey);
        const secret = toValue(s3.secret);
        const bucket = s3.bucket || '';
        const api = {
            endpoint,
            cdn,
            accessKey,
            secret,
            bucket,
            path: {
                base: stripSlashes(path.base || ''),
                manifest: stripSlashes(path.manifest || ''),
                bundles: stripSlashes(path.bundles || ''),
            },
            get config() {
                return { endpoint, accessKey, secret };
            },
            get fs() {
                return fs.s3(api.config);
            },
            async versions(options = {}) {
                const s3 = api.fs;
                const prefix = `${api.path.base}/${api.path.bundles}`;
                const list = s3.list({
                    bucket,
                    prefix,
                });
                const dirs = (await list.dirs).items.map(({ key }) => ({ key, version: fs.basename(key) }));
                const versions = semver.sort(dirs.map(item => item.version));
                return options.sort === 'DESC' ? versions.reverse() : versions;
            },
        };
        return api;
    }
    get baseUrl() {
        const s3 = this.s3;
        return `https://${s3.cdn || s3.endpoint}/${s3.path.base}`;
    }
    get manifest() {
        const filePath = fs.resolve(this.def.manifest || 'manifest.yml');
        const s3 = this.s3;
        const manifestUrl = `https://${s3.endpoint}/${s3.bucket}/${s3.path.base}/${s3.path.manifest}`;
        const baseUrl = this.baseUrl;
        const config = this;
        const api = {
            local: {
                path: filePath,
                get exists() {
                    return fs.pathExists(filePath);
                },
                async load(args = {}) {
                    const { loadBundleManifest } = args;
                    return Manifest.fromFile({ path: filePath, baseUrl, loadBundleManifest });
                },
                async ensureLatest(args = {}) {
                    if (!(await api.local.exists)) {
                        await config.createFromTemplate();
                    }
                    const remote = await api.s3.pull({ force: true });
                    if (remote.ok) {
                        const minimal = defaultValue(args.minimal, true);
                        await remote.save(filePath, { minimal });
                    }
                    return api.local.load();
                },
            },
            s3: {
                url: manifestUrl,
                async pull(args = {}) {
                    return Manifest.get(Object.assign(Object.assign({}, args), { manifestUrl, baseUrl }));
                },
            },
        };
        return api;
    }
    async createFromTemplate() {
        const source = fs.join(__dirname, '../tmpl/manifest.yml');
        const target = this.manifest.local.path;
        await fs.ensureDir(fs.dirname(target));
        await fs.copy(source, target);
        return { source, target };
    }
}
Config.create = async (options = {}) => {
    const path = fs.resolve(options.path || DEFAULT.FILE);
    if (!(await fs.pathExists(path))) {
        throw new Error(ERROR.noFile(path));
    }
    else {
        const def = await fs.file.loadAndParse(path);
        return new Config({ def });
    }
};
Config.createSync = (options = {}) => {
    const path = fs.resolve(options.path || DEFAULT.FILE);
    if (!fs.pathExistsSync(path)) {
        throw new Error(`An "ssr.yml" configuration file does not exist at: ${path}`);
    }
    else {
        const def = fs.file.loadAndParseSync(path);
        return new Config({ def });
    }
};
const toValue = (value) => {
    value = value || '';
    value = process.env[value] ? process.env[value] : value;
    return value || '';
};