@kitmi/config/src/defaultSyntax.js

JavaScript env-aware config system

import { _ } from '@kitmi/utils';

export const PROCESSOR_PREFIX = '#!';

// syntax: <PROCESSOR_PREFIX><TOKEN>:

export const JS_VALUE_TOKEN = 'jsv';
export const ES6_TEMPLATE_TOKEN = 'es6';
export const JS_SWIG_TOKEN = 'swig';
export const FN_TOKEN = 'fn';

const esTemplateSetting = {
    interpolate: /\$\{([\s\S]+?)\}/g,
};

const swigTemplateSetting = {
    interpolate: /{{([\s\S]+?)}}/g,
};

const processors = {
    [JS_VALUE_TOKEN]: (str, variables) => {
        // eslint-disable-next-line no-new-func
        return new Function('v', 'with (v) { return (' + str + ')}')(variables);
    },
    [ES6_TEMPLATE_TOKEN]: (str, variables) => {
        str = str.trim();
        if (str) {
            return _.template(str, esTemplateSetting)(variables);
        }

        return str;
    },
    [JS_SWIG_TOKEN]: (str, variables) => {
        str = str.trim();
        if (str) {
            return _.template(str, swigTemplateSetting)(variables);
        }

        return str;
    },
    [FN_TOKEN]: (str) => {
        // eslint-disable-next-line no-new-func
        return new Function('v', `with (v) { ${str} }`);
    },
};

export default {
    prefix: PROCESSOR_PREFIX,
    processors,
};