apemanmodule/lib/_datasource.js

/**
 * @function _datasource
 */

"use strict";

const fs = require('fs'),
    path = require('path'),
    minimatch = require('minimatch'),
    stringcase = require('stringcase'),
    evaljson = require('evaljson'),
    _isModule = require('./_is_module');

/** @lends _datasource */
function _datasource(dirname, options) {
    options = options || {};
    let vars = options.vars;
    let pascalPatterns = [].concat(options.pascal || []);

    function _isPascal(name) {
        for (let pattern of pascalPatterns) {
            let hit = minimatch(name, pattern);
            if (hit) {
                return true;
            }
        }
        return false;
    }

    let datasource = {};
    fs.readdirSync(dirname)
        .filter(filename => !/^index\./.test(filename))
        .filter(filename => !/\.jsx$/.test(filename))
        .filter(filename => !/^[\.\_]/.test(filename))
        .map(filename => path.resolve(dirname, filename))
        .filter(_isModule)
        .forEach(filename => {
            let name = path.basename(filename, path.extname(filename));
            let isPascal = _isPascal(path.basename(filename)) || _isPascal(name) || _isPascal(stringcase.pascalcase(name));
            if (isPascal) {
                name = stringcase.pascalcase(name);
            } else {
                name = stringcase.camelcase(name);
            }
            Object.defineProperty(datasource, name, {
                get: () => {
                    let data = require(filename);
                    if (path.extname(filename) === '.json') {
                        return evaljson(data, vars);
                    } else {
                        return data;
                    }
                },
                configurable: true,
                enumerable: true
            })
        });
    return datasource;
}

module.exports = _datasource;