@kele23/fe-aem-server/src/engine/htl/model.js

FE AEM Server

import fs from 'fs';
import path from 'path';
import vm from 'vm';
import logger from '../../utils/logger.js';

class Model {
    constructor(mpath) {
        this.mpath = mpath;
    }

    use(globals) {
        if (!fs.existsSync(this.mpath)) {
            logger.warn(`Cannot find model with path: ${this.mpath}`);
            return {};
        }

        try {
            const vmContext = vm.createContext({
                use: (deps = [], fn = null) => {
                    //deps could be the fn
                    if (!Array.isArray(deps)) {
                        fn = deps;
                        deps = [];
                    }
                    //load dependencies
                    const objs = [];
                    for (const dep of deps) {
                        const depFilePath = path.resolve(this.mpath, dep);
                        var depM = new Model(depFilePath);
                        objs.push(depM.use(globals));
                    }
                    return fn.apply(globals, objs);
                },
                console: logger,
            });

            const source = fs.readFileSync(this.mpath, { encoding: 'utf-8' });
            const vmScript = new vm.Script(source);
            return vmScript.runInContext(vmContext);
        } catch (e) {
            logger.warn('Cannot exec model ' + this.mpath);
            logger.warn('>> resource ' + globals.resource.getPath());
            logger.warn(`>> ${e.message} -- ${e.stackTrace}`);
        }
    }

    static make(mpath) {
        return new Model(mpath);
    }
}

export default Model;