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