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Remembers and displays the prices you have seen for listings.
当前为
// ==UserScript==
// @name DLSite Price History
// @namespace V.L
// @version 0.2.0
// @description Remembers and displays the prices you have seen for listings.
// @author Valerio Lyndon
// @match https://www.dlsite.com/*
// @run-at document-start
// @grant GM.setValue
// @grant GM.getValue
// @grant GM.listValues
// @grant GM.addStyle
// @license MIT
// ==/UserScript==
// change this to "true" to disable modifying any properties. useful when developing.
const debug = false;
GM.addStyle(`
.vl-phist {
max-width: 200px;
padding: 0 6px;
border-radius: 2px;
background: #c4c4c4;
color: #fff;
font-size: 11px;
font-weight: bold;
line-height: 17px;
vertical-align: middle;
box-sizing: border-box;
text-align: center;
text-transform: uppercase;
}
.vl-phist.best {
background: #68e;
}
.vl-phist.new.best {
background: #d78d2e;
}
.vl-phist.worse {
background: #e69;
}
.cp_work_deals .vl-phist {
display: inline-block;
width: 49%;
}
.search_result_img_box_inner .vl-phist {
margin-top: 5px;
}
`);
class HistoricalData {
constructor( best, bestDate = Date.now(), addedDate = Date.now() ){
this.best = best;
this.bestDate = bestDate;
this.addedDate = addedDate;
if( this.best < 0 ){
throw new RangeError('price cannot be less than zero');
}
}
/**
* compares a new price to the best seen.
*
* returns negative if new price is worse OR positive if better
* use as true/false by checking >0 or <0 or as difference with the full return;
*/
compare( price ){
return this.best - price;
}
toDict( ){
return {
'best': this.best,
'best_date': this.bestDate,
'added_date': this.addedDate
}
}
toString( ){
return JSON.stringify(this.toDict());
}
static from( stringOrObj ){
let obj = typeof stringOrObj === 'string' ? JSON.parse(stringOrObj) : stringOrObj;
return new HistoricalData(obj['best'], obj['best_date'], obj['added_date']);
}
}
function hoursApart( unix1, unix2 = Date.now() ){
return Math.floor(Math.abs(unix1 - unix2) / (1000 * 60 * 60));
}
function daysApart( unix1, unix2 = Date.now() ){
return Math.floor(hoursApart(unix1,unix2) / 24);
}
function generateSeenAt( unix ){
const date = new Date();
let days = daysApart(date.getTime(), unix);
let year = date.getFullYear();
let month = Intl.DateTimeFormat('en-US', {'month': 'short'}).format(date);
let day = date.getDate();
let dayStr = days === 1 ? "1 day ago" : `${days} days ago`;
let string = `Seen ${dayStr} on ${year}-${month}-${day}`;
return string;
}
class PriceProcessor {
constructor( parent ){
this.parent = parent || document;
this.processWorkPage();
this.processCarousel();
this.processGrid();
this.processRecommended();
this.processFavourites();
}
async insertPrice( workId, price, marker, placement = 'afterend' ){
let previous = await GM.getValue(workId, false);
previous = previous === false ? new HistoricalData(price) : HistoricalData.from(previous);
let alert = document.createElement('div');
alert.className = 'vl-phist';
if( hoursApart(previous.bestDate) <= 12 ){
alert.textContent = 'Newly recorded';
}
else if( previous.compare(price) >= 0 ){
// update storage
if( !debug ){ GM.setValue(workId, new HistoricalData(price).toString()); }
alert.classList.add('best');
if( hoursApart(previous.bestDate) <= 12 ){
alert.textContent = 'NEW BEST';
alert.classList.add('new');
}
else {
alert.textContent = 'MATCHES BEST';
}
}
else {
alert.classList.add('worse');
alert.textContent = `Best seen: ${previous.best} JPY`;
}
alert.title = generateSeenAt(previous.bestDate);
marker.insertAdjacentElement(placement, alert);
}
async processWorkPage( ){
const item = this.parent.querySelector('#work_buy_box_wrapper');
if( !item ){
return;
}
const workId = item.dataset.productId;
if( !workId ){
console.log('failed to read workId number: ', item);
return;
}
let currentPrice = item.querySelector('.work_buy_content .price')?.firstChild?.textContent;
if( currentPrice === undefined ){
console.log('failed to read price of '+workId);
return;
}
currentPrice = parseInt(currentPrice.replaceAll(/\D+/g, ''));
// janky timeout because DLSite removes and replaces some of the children here and I can't be fucked to write a mutation observer for this
setTimeout(()=>{
const marker = item.querySelector('.work_buy_body:has(.price)');
this.insertPrice( workId, currentPrice, marker );
}, 300);
}
async processCarousel( ){
const listings = this.parent.querySelectorAll('.cp_work_item');
for( let item of listings ){
const workId = item.dataset.workno;
if( !workId ){
console.log('failed to read workId number: ', item);
continue;
}
let currentPrice = item.querySelector('.cp_work_price')?.firstChild?.textContent;
if( currentPrice === undefined ){
console.log('failed to read price of '+workId);
continue;
}
currentPrice = parseInt(currentPrice.replaceAll(/\D+/g, ''));
const marker = item.querySelector('.cp_work_deals span:last-of-type') || item.querySelector('.cp_work_value');
this.insertPrice( workId, currentPrice, marker );
}
}
async processGrid( ){
const listings = this.parent.querySelectorAll('.search_result_img_box_inner');
for( let item of listings ){
let workId = item.getElementsByTagName('dt')?.[0]?.id;
workId = typeof workId === 'string' ? workId.substring(6) : undefined;
if( !workId ){
console.log('failed to read workId number: ', item);
continue;
}
let currentPrice = item.querySelector('.work_price')?.firstChild?.textContent;
if( currentPrice === undefined ){
console.log('failed to read price of '+workId);
continue;
}
currentPrice = parseInt(currentPrice.replaceAll(/\D+/g, ''));
const marker = item.querySelector('.work_deals');
this.insertPrice( workId, currentPrice, marker );
}
}
async processRecommended( ){
const listings = this.parent.querySelectorAll('.recommend_list .swiper-slide');
for( let item of listings ){
const workId = item.dataset.prod;
if( !workId ){
console.log('failed to read workId number: ', item);
continue;
}
let currentPrice = item.querySelector('.work_price')?.firstChild?.textContent;
if( currentPrice === undefined ){
console.log('failed to read price of '+workId);
continue;
}
currentPrice = parseInt(currentPrice.replaceAll(/\D+/g, ''));
const marker = item.querySelector('.recommend_work_item div:nth-last-of-type(2)');
this.insertPrice( workId, currentPrice, marker );
}
}
async processFavourites( ){
const listings = this.parent.querySelectorAll('._favorite_item');
for( let item of listings ){
let workId = item.querySelector('.work_thumb a')?.id;
workId = typeof workId === 'string' ? workId.substring(6) : undefined;
if( !workId ){
console.log('failed to read workId number: ', item);
continue;
}
let currentPrice = item.querySelector('.work_price')?.firstChild?.textContent;
if( currentPrice === undefined ){
console.log('failed to read price of '+workId);
continue;
}
currentPrice = parseInt(currentPrice.replaceAll(/\D+/g, ''));
const marker = item.querySelector('.work_price_wrap');
this.insertPrice( workId, currentPrice, marker );
}
}
}
// process older versions of the script
const reserved_keys = ['version'];
async function updateVersion( ){
if( await GM.getValue('version', '0.1.0') === '0.1.0' ){
for( let key of await GM.listValues() ){
let value = parseFloat(await GM.getValue(key));
if( reserved_keys.includes(key) || value === NaN ){
continue;
}
let data = new HistoricalDate(value);
if( !debug ){ GM.setValue(key, newValue.toString()); }
}
}
if( !debug ){ GM.setValue('version', '0.2.0'); }
}
// run script
document.addEventListener('DOMContentLoaded', async ()=>{
await updateVersion();
new PriceProcessor();
document.querySelectorAll('.recommend_list').forEach((targetNode)=>{
const observer = new MutationObserver((mutationsList, observer)=>{
new PriceProcessor(targetNode);
observer.disconnect();
});
observer.observe(targetNode, { childList: true });
});
});