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- // ==UserScript==
- // @name [e-dostavka.by, gipermall.by] price comparison
- // @namespace http://tampermonkey.net/
- // @version 2.0
- // @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 float = n => parseFloat(n.sourceString)
- const priceG = ohm.grammar(`Price { Price = digit+ "р." digit+ "к." Price? }`)
- const priceS = priceG.createSemantics().addOperation('val', {
- Price: (rub, _2, kop, _4, _5) => float(rub) * 100 + float(kop),
- })
- const weightG = ohm.grammar(`Weight {
- Exp = BS* AnyWeight BS* AnyWeight? BS*
- AnyWeight = MulWeight | Weight
- Weight = float (OneUnit | ThUnit)
- OneUnit = Dot<"г"> | Dot<"мл"> | Dot<"шт"> | Dot<"см">
- ThUnit = Dot<"кг"> | Dot<"л"> | Dot<"м">
- Dot<R> = R "."*
- MulWeight = float ("x" | "х" | "*") Weight
- BS = ~AnyWeight any
- float = (digit digit* "." digit) -- fl
- | digit+
- }`)
- const weightS = weightG.createSemantics().addOperation('val', {
- Exp: (_, weight, __, ___, _____) => weight.val(),
- Weight: (n, u) => float(n) * u.val(),
- OneUnit: _ => 1, ThUnit: _ => 1000,
- MulWeight: (d, _, w) => float(d) * w.val(),
- })
- const interpret = (g, s) => (text) => s(g.match(text))
- return (price, weight) => (interpret(priceG, priceS)(price).val() / interpret(weightG, weightS)(weight).val() / 100 * 1000)
- })()
- const $ = unsafeWindow.jQuery; // somehow, when @including jquery, infinite scroll stops working.
- 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 => {
- 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 button = template.clone()
- const url = (R.test(/e-dostavka/, location.host) ? R.identity : R.flip)(R.replace)('e-dostavka', 'gipermall', $(div).find('a.fancy_ajax').attr('href'))
- $(div).find('a.fa').replaceWith(button)
- button.text(normalizedPrice.toFixed(2))
- 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 difference = Math.abs(1 - competingPrice / normalizedPrice) * 100
- button.text((i, _) => `${_} (${competingPrice >= normalizedPrice ? '>' : '<'}${difference.toFixed(0)}%)`).prop('href', url)
- } catch (e) { }
- }
- });
- });
- })();
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