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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 | 1x 1x 1x 1x 1x 3x 2x 2x 3x 3x 1x 2x 2x 1x 1x 1x 3x 8x 2x 1x 1x | const fe = require('file-exists');
const fs = require('fs');
const isJson = require('is-valid-json');
const DEFAULT_CONFIG_WARNING_MESSAGE = 'No configuration file or object included. Defaults will be used.';
const DEFAULT_CONFIG = {
accentColor: 'red',
filename: 'example',
header: {
banner: 'http://www.example.com/image.png',
link: 'http://www.example.com/',
title: 'Example Header',
},
greeting: 'Hey there,',
intro: 'Thanks for opening the email! Here are some links I want you to check out:',
feeds: [
{
description: 'A short custom feed description',
title: 'A custom feed title',
url: 'http://www.feedforall.com/sample.xml',
},
{
description: 'A short custom feed description',
title: 'A custom feed title',
url: 'http://www.feedforall.com/sample.xml',
},
],
outro: "Thanks for reading. We'll be back next week with more!",
signature: 'John Smith, CMO at Example Co.',
};
/**
* Determines whether an input is a filepath or not
* @param {(string|Object)} input
* @returns {boolean}
*/
function isFilepathString(input) {
return typeof input === 'string' && fe.sync(input);
}
/**
* Determines whether an input string is a JSON object or not
* @param {(string|Object)} input
* @returns {boolean}
*/
function isJsonString(input) {
return typeof input === 'string' && isJson(input);
}
/**
* Determines whether an input is a configuration object or not
* @param {(string|Object)} input
* @returns {boolean}
*/
function isConfigObject(input) {
return typeof input === 'object';
}
/**
* Merge two configuration objects
* @param {Object} config1
* @param {Object} config2
* @returns {Object}
*/
function merge(config1, config2) {
return Object.assign(config1, config2);
}
class Config {
/**
* Instantiates a new config object based on a string or object input
* @param {(string|Object)} input
* @returns {Object}
*/
constructor(input) {
let config;
if (isFilepathString(input)) {
config = Config.getFromFile(input);
} else Iif (isJsonString(input)) {
config = Config.getFromJson(input);
} else if (isConfigObject(input)) {
config = Config.getFromObject(input);
} else {
console.warn(DEFAULT_CONFIG_WARNING_MESSAGE);
config = Config.getDefault();
}
return config;
}
/**
* Get the default config object
* @returns {Object}
*/
static getDefault() {
return DEFAULT_CONFIG;
}
/**
* Generate a config object from a json string
* @param {string} input
* @returns {Object}
*/
static getFromJson(input) {
return merge(Config.getDefault(), Config.getFromObject(JSON.parse(input)));
}
/**
* Generate a config object from a filepath
* @param {string} input
* @returns {Object}
*/
static getFromFile(input) {
return merge(Config.getDefault(), JSON.parse(fs.readFileSync(input)));
}
/**
* Generate a config object from an object
* @param {Object} input
* @returns {Object}
*/
static getFromObject(input) {
return merge(Config.getDefault(), input);
}
}
module.exports = Config;
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