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eae40dd8c9
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| eae40dd8c9 |
@ -13,36 +13,44 @@
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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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; (function ($) {
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'use strict';
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const price = (() => {
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const float = n => parseFloat(n.sourceString)
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const priceG = ohm.grammar(`Price { Price = digit+ "р." digit+ "к." Price? }`)
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const priceS = priceG.createSemantics().addOperation('val', {
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Price: (rub, _2, kop, _4, _5) => float(rub) * 100 + float(kop),
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})
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const weightG = 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 (OneUnit | ThUnit)
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OneUnit = Dot<"г"> | Dot<"мл"> | Dot<"шт"> | Dot<"см">
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ThUnit = Dot<"кг"> | Dot<"л"> | Dot<"м">
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Dot<R> = R "."*
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MulWeight = float ("x" | "х" | "*") Weight
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BS = ~AnyWeight any
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float = (digit digit* "." digit) -- fl
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| digit+
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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 weightS = weightG.createSemantics().addOperation('val', {
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Exp: (_, weight, __, ___, _____) => weight.val(),
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Weight: (n, u) => float(n) * u.val(),
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OneUnit: _ => 1, ThUnit: _ => 1000,
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MulWeight: (d, _, w) => float(d) * w.val(),
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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 interpret = (g, s) => (text) => s(g.match(text))
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return (price, weight) => (interpret(priceG, priceS)(price).val() / interpret(weightG, weightS)(weight).val() / 100 * 1000)
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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 $ = unsafeWindow.jQuery; // somehow, when @including jquery, infinite scroll stops working.
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const template = $("<a/>").css({
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'background-color': '#fbba00',
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'color': 'black', // default is #cb4f2b
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@ -54,26 +62,29 @@
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'right': '5px'
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}).attr('target', '_blank')
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$(document).arrive(".products_card", { existing: true }, div => {
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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 button = template.clone()
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const url = (R.test(/e-dostavka/, location.host) ? R.identity : R.flip)(R.replace)('e-dostavka', 'gipermall', $(div).find('a.fancy_ajax').attr('href'))
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$(div).find('a.fa').replaceWith(button)
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button.text(normalizedPrice.toFixed(2))
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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 difference = Math.abs(1 - competingPrice / normalizedPrice) * 100
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button.text((i, _) => `${_} (${competingPrice >= normalizedPrice ? '>' : '<'}${difference.toFixed(0)}%)`).prop('href', url)
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} catch (e) { }
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}
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});
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try {
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const normalizedPrice = price(
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$(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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})();
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})(unsafeWindow.jQuery); // somehow, when @including jquery, infinite scroll stops working.
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