90 lines
4.4 KiB
JavaScript
90 lines
4.4 KiB
JavaScript
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// ==UserScript==
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// @name [e-dostavka.by, gipermall.by] price comparison
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// @namespace http://tampermonkey.net/
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// @version 2
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// @description Show prices per kilo, compare between sites
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// @author nomoreknights
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// @match https://e-dostavka.by/*
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// @match https://gipermall.by/*
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// @grant unsafeWindow
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// @grant GM.xmlHttpRequest
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// @require https://cdnjs.cloudflare.com/ajax/libs/arrive/2.4.1/arrive.min.js
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// @require https://cdnjs.cloudflare.com/ajax/libs/ramda/0.26.1/ramda.min.js
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// @require https://unpkg.com/ohm-js@0.14.0/dist/ohm.min.js
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// ==/UserScript==
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; (function ($) {
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'use strict';
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const price = (() => {
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const priceGrammar = ohm.grammar(`Price {
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Price = integer "р." integer "к." Price?
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integer = digit+
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}`)
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const priceVal = priceGrammar.createSemantics().addOperation('val', {
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Price: (rub, _1, kop, _2, _3) => rub.val() + kop.val() * 0.01,
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integer: _ => parseInt(_.sourceString)
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})
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const weightGrammar = ohm.grammar(`Weight {
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Exp = BS AnyWeight BS AnyWeight? BS
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AnyWeight = MulWeight | Weight
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Weight = float (Unit1 | Unit10 | Unit1000) "."*
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MulWeight = float ("x" | "х" | "*") Weight
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float = digit+ ("." digit+)? -- fl
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Unit1 = "г" | "мл"
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Unit10 = "см"
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Unit1000 = "кг" | "л" | "м" | "шт"
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BS = (~AnyWeight any)*
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}`)
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const weightVal = weightGrammar.createSemantics().addOperation('val', {
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Exp: (_1, weight, _2, _3, _4) => weight.val(),
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Weight: (n, u, _1) => n.val() * u.val(),
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MulWeight: (d, _, w) => d.val() * w.val(),
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Unit1: _ => 0.001,
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Unit10: _ => 0.01,
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Unit1000: _ => 1,
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float: _ => parseFloat(_.sourceString)
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})
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const interpret = (grammar, semantics, text) => {
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const match = grammar.match(text)
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if (match.failed()) console.log(`Failed to parse [${text}] with ${match.message}`)
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return semantics(match).val()
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}
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return (price, weight) => interpret(priceGrammar, priceVal, price) / interpret(weightGrammar, weightVal, weight)
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})()
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const template = $("<a/>").css({
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'background-color': '#fbba00',
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'color': 'black', // default is #cb4f2b
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'padding': '2px',
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'border-radius': '5px',
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'font-size': '14px',
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'font-family': 'MyriadProCondencedBoldItalic',
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'position': 'absolute',
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'right': '5px'
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}).attr('target', '_blank')
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$(document).arrive(".products_card", { existing: true }, div => {
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try {
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const normalizedPrice = price(
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$(div).find('div > form > div.prices__wrapper > div > div.prices_block > div > div.price').text(),
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$(div).find('a.fancy_ajax').text()
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)
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const link = template.clone()
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$(div).find('a.fa').replaceWith(link)
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link.text(normalizedPrice.toFixed(2))
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const url = (R.test(/e-dostavka/, location.host) ? R.identity : R.flip)(R.replace)('e-dostavka', 'gipermall', $(div).find('a.fancy_ajax').attr('href'))
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GM.xmlHttpRequest({
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method: 'GET', url, onload: page => {
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try {
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const html = $($.parseHTML(page.responseText))
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const competingPrice = price(
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html.find('div.services_wrap:nth-child(3) > div:nth-child(1) > div:nth-child(1) > div:nth-child(1)').text(),
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html.find('.template_1_columns > h1:nth-child(2)').text()
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)
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const diff = (1 - competingPrice / normalizedPrice) * 100
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link.text((_, text) => `${text} (${diff > 0 ? '>' : '<'}${Math.abs(diff).toFixed(0)}%)`)
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.prop('href', url)
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} catch (e) { console.log(`Failed to process page ${url}`, e) }
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}
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});
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} catch (e) { console.log(`Failed to process product card with ${$(div).find('a.fancy_ajax').text()}`, e) }
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});
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})(unsafeWindow.jQuery); // somehow, when @including jquery, infinite scroll stops working.
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