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* Functions & classes, which content is trivial or|and doesn't require
* complex implementation (<10 SLOC mostly).
*
* @module
*/
const os = require("os");
const util = require("util");
const _ = require("lodash");
const BaseError = require("es6-error");
/**
* Creates a new instance of `glacejs` error.
*
* @memberOf module:glace-utils
* @class
* @classdesc A base class for exceptions and errors, which are raised by
* `glacejs` framework or its plugins. Any `glacejs` exception should be
* inherited from this class for good style.
* @arg {string} message - Error message.
*/
const GlaceError = function (message) {
BaseError.call(this, message);
};
util.inherits(GlaceError, BaseError);
/**
* @memberOf module:glace-utils
* @property {string} hostname - Host name of machine where `glacejs` framework is
* launched. Despite of machine hostname can be changed during script execution
* the probability that hostname will be changed during tests execution is low.
* That's why it's kept as property and in low case, because hostname is case
* insensitive.
*/
const hostname = os.hostname().toLowerCase();
/**
* Pick default value for variable among listed values.
*
* @memberOf module:glace-utils
* @function
* @arg {...*} values - Sequence of variable values.
* @return {*} First defined value or `null` if no one is defined.
*
* @example
* U.coalesce(); // null
* U.coalesce(undefined); // null
* U.coalesce(undefined, 1); // 1
* U.coalesce(undefined, 1, 2); // 1
* U.coalesce(null, 1); // null
*/
const coalesce = function () {
for (const arg of arguments)
if (typeof arg !== "undefined")
return arg;
return null;
};
/**
* Capitalizes the first letter of a string. It doesn't influence to case
* of other letters.
*
* @memberOf module:glace-utils
* @function
* @arg {string} string - String to capitalize.
* @return {string} Capitalized string.
*
* @example
* U.capitalize('hello'); // 'Hello'
* U.capitalize('Hello'); // 'Hello'
* U.capitalize('hEllo'); // 'HEllo'
*/
const capitalize = string => {
return string.charAt(0).toUpperCase() + string.slice(1);
};
/**
* Creates each to each combinations of sets.
*
* @memberOf module:glace-utils
* @function
* @arg {Array<Array>} l - Array of arrays to combine.
* @arg {?function} [p] - Function to process element before adding to combination.
* It passes two arguments:
* `e` - a new element to add;
* `c` - assembling combination;
* By default it just pushes `e` to `c`.
* @return {Array<Array>} List of combinations.
*
* @example
* each2each([[1, 2], [3, 4]]); // [[1, 3], [1, 4], [2, 3], [2, 4]]
* each2each([[1, 2], [3, 4]], e => e + 1); // [[2, 4], [2, 5], [3, 4], [3, 5]]
* each2each([[1, 2], [3, 4]], (e, c) => e + _.sum(c)); // [[1, 4], [1, 5], [2, 5], [2, 6]]
*/
const each2each = (l, p = e => e) => {
let r = [[]];
for (const i of l) {
const t = [];
for (const j of r) {
for (const e of i) {
const c = _.clone(j);
c.push(p(e, c));
t.push(c);
}
}
r = t;
}
return r;
};
/**
* Splits string to array by delimiter.
*
* @memberOf module:glace-utils
* @function
* @arg {string} s - String to split.
* @arg {char} d - String delimiter.
* @return {array<string>}
*
* @example
* U.splitBy("a, b, c", ","); // ['a', 'b', 'c']
*/
const splitBy = (s, d) => _.filter(_.map(s.split(d), e => e.trim()));
/**
* Checks if text contains words or no.
*
* @memberOf module:glace-utils
* @function
* @arg {string} string - Original text.
* @arg {string} words - Checking words.
* @return {boolean} - `true` if text contains words, `false` otherwise.
*
* @example
* U.textContains("hello world", "hello world"); // true
*/
const textContains = (text, words) => {
if (!text) return false;
if (!words) return true;
text = text.toLowerCase();
words = words.toLowerCase().split(/ +/g);
return _.isEmpty(missedWords(text, words, true));
};
/**
* Detects words if they are missed in text (case-sensitive).
*
* @memberOf module:glace-utils
* @function
* @arg {string} text - Text where words are looked for.
* @arg {string[]} words - Filtered words.
* @arg {boolean} [firstMissedOnly=false] - Flag to return first missed word only.
* It reduces searching time and recommended to use if not need to get all missed words.
* @returns {string[]} - Array of missed words.
*
* @example
* U.missedWords("hello world", ["hello", "man"]); // ["man"]
*/
const missedWords = (text, words, firstMissedOnly = false) => {
if (!text || _.isEmpty(words)) {
if (firstMissedOnly && !_.isEmpty(words)) {
return words.slice(0, 1);
} else {
return words;
}
}
const missed = [];
for (const word of words) {
if (text.includes(word)) continue;
if (firstMissedOnly) return [word];
missed.push(word);
}
return missed;
};
module.exports = {
GlaceError,
hostname,
coalesce,
capitalize,
each2each,
splitBy,
textContains,
missedWords,
};
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