template.js

const fs = require('fs');
const path = require('path');
const yaml = require('js-yaml');

class Template {
    constructor(app) {
        this.dir = app.templatesDir;
        this.logger = app.logger;
    }
    load() {
        this.logger.info(
            'Template -> loading request templates from: ' + this.dir
        );
        const dirents = fs.readdirSync(this.dir, {
            withFileTypes: true,
        });
        const filesNames = dirents
            .filter((dirent) => dirent.isFile())
            .map((dirent) => dirent.name);

        let templates = [];
        let dynamicTemplates = [];
        let specialTemplates = [];

        for (let index = 0; index < filesNames.length; index++) {
            const template = filesNames[index];

            let ext = path.extname(template);
            if (ext == '.js') {
                //dynamically loaded js
                //add the filename to be required later
                dynamicTemplates.push(this.dir + '/' + template);
                continue;
            }

            if (ext != '.yaml' && ext != '.yml') continue; //unsupported file format
            try {
                let doc = yaml.load(
                    fs.readFileSync(this.dir + '/' + template, 'utf8')
                );
                this.logger.info(
                    'Template -> loading template: ' + template + ' success '
                );

                if (template == '404.yaml' || template == '404.yml') {
                    specialTemplates.push(doc);
                    continue;
                }
                templates.push(doc);
            } catch (e) {
                throw new Error(
                    'Failed loading template: ' + template + ': ' + e
                );
            }
        }

        return {
            templates: [...templates, ...specialTemplates],
            dynamicTemplates,
        };
    }
}

module.exports = Template;