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books/frappe/utils/index.js

100 lines
1.9 KiB
JavaScript

const { pesa } = require('pesa');
Array.prototype.equals = function (array) {
return (
this.length == array.length &&
this.every(function (item, i) {
return item == array[i];
})
);
};
function slug(str) {
return str
.replace(/(?:^\w|[A-Z]|\b\w)/g, function (letter, index) {
return index == 0 ? letter.toLowerCase() : letter.toUpperCase();
})
.replace(/\s+/g, '');
}
function getRandomString() {
return Math.random().toString(36).substr(3);
}
async function sleep(seconds) {
return new Promise((resolve) => {
setTimeout(resolve, seconds * 1000);
});
}
function getQueryString(params) {
if (!params) return '';
let parts = [];
for (let key in params) {
if (key != null && params[key] != null) {
parts.push(
encodeURIComponent(key) + '=' + encodeURIComponent(params[key])
);
}
}
return parts.join('&');
}
function asyncHandler(fn) {
return (req, res, next) =>
Promise.resolve(fn(req, res, next)).catch((err) => {
console.log(err);
// handle error
res.status(err.statusCode || 500).send({ error: err.message });
});
}
/**
* Returns array from 0 to n - 1
* @param {Number} n
*/
function range(n) {
return Array(n)
.fill()
.map((_, i) => i);
}
function unique(list, key = (it) => it) {
var seen = {};
return list.filter((item) => {
var k = key(item);
return seen.hasOwnProperty(k) ? false : (seen[k] = true);
});
}
function getDuplicates(array) {
let duplicates = [];
for (let i in array) {
let previous = array[i - 1];
let current = array[i];
if (current === previous) {
if (!duplicates.includes(current)) {
duplicates.push(current);
}
}
}
return duplicates;
}
function isPesa(value) {
return value instanceof pesa().constructor;
}
module.exports = {
slug,
getRandomString,
sleep,
getQueryString,
asyncHandler,
range,
unique,
getDuplicates,
isPesa,
};