feat: apply coupons to price detection

SpikeHD · Nov 23, 2023 · 3555e16 · 3555e16
1 parent 6e8894d
commit 3555e16
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Showing 4 changed files with 21 additions and 3 deletions.
diff --git a/common/amazon.ts b/common/amazon.ts
@@ -10,6 +10,7 @@ export async function search(query: string, suffix: string) {
   const sanq = query.replace(/ /g, '+')
   const url = `https://www.amazon.${suffix}/s?k=${sanq}`
   const results: SearchData[] = []
+  const foundAsins: string[] = []
 
   const $ = await getPage(url)
   const limit = $('.s-result-list').find('.s-result-item').length
@@ -28,6 +29,10 @@ export async function search(query: string, suffix: string) {
     const price = priceFormat($(this).find('.a-price').find('.a-offscreen').first().text().trim().replace(/[a-zA-Z]/g, ''))
     const maybeCoupon = priceFormat($(this).find('.s-coupon-unclipped span').first().text().trim().replace(/[a-zA-Z]/g, ''))
 
+    // prevent duplicates
+    if (foundAsins.includes(asin)) return
+    foundAsins.push(asin)
+
     results.push({
       fullTitle: $(this).find('span.a-text-normal').text().trim(),
       ratings: $(this).find('.a-icon-alt').text().trim(),

diff --git a/common/notifications.ts b/common/notifications.ts
@@ -50,7 +50,9 @@ export async function sendPriceChange(bot: Client, notification: NotificationDat
       name: 'AmazonMonitor'
     })
     .setThumbnail(notification.image)
-    .setDescription(`Old Price: ${notification.symbol} ${priceFormat(notification.oldPrice)}\nNew Price: ${notification.symbol} ${notification.newPrice}\n\n${notification.link}`)
+    .setDescription(`Old Price: ${notification.symbol}${priceFormat(notification.oldPrice)}\nNew Price: ${notification.symbol}${notification.newPrice.toFixed(2) + (
+      notification.coupon > 0 ? ` (with ${notification.symbol}${notification.coupon.toFixed(2)} coupon)` : ''
+    )}\n\n${notification.link}`)
     .setColor('Green')
 
   const channel = await bot.channels.fetch(notification.channelId)

diff --git a/common/watcher.ts b/common/watcher.ts
@@ -95,6 +95,7 @@ async function itemCheck(product: LinkItem) {
         difference: product.difference || null,
         symbol: newData?.symbol,
         image: newData?.image,
+        coupon: 0
       }
     ] as NotificationData[]
   }
@@ -135,6 +136,7 @@ async function categoryCheck(cat: CategoryItem) {
         difference: cat.difference || null,
         symbol: item.symbol,
         image: item?.image,
+        coupon: 0,
       })
     }
   })
@@ -169,11 +171,18 @@ async function queryCheck(query: QueryItem) {
 
     if (matchingObj.lastPrice === item.lastPrice) return
 
-    if (item.lastPrice > matchingObj.lastPrice) {
+    // if the obj has a coupon, modify the lastprice to reflect that
+    if (matchingObj.coupon > 0) {
+      matchingObj.lastPrice -= matchingObj.coupon
+    }
+
+    const newPriceWithCoupon = item.coupon > 0 ? item.lastPrice - item.coupon : item.lastPrice
+
+    if (newPriceWithCoupon < matchingObj.lastPrice) {
       notifications.push({
         itemName: item.fullTitle,
         oldPrice: matchingObj.lastPrice,
-        newPrice: item.lastPrice,
+        newPrice: newPriceWithCoupon,
         link: item.fullLink,
         guildId: query.guildId,
         channelId: query.channelId,
@@ -182,6 +191,7 @@ async function queryCheck(query: QueryItem) {
         difference: query.difference || null,
         symbol: item.symbol,
         image: item?.image,
+        coupon: matchingObj.coupon,
       })
     }
   })

diff --git a/global.d.ts b/global.d.ts
@@ -31,6 +31,7 @@ interface Command {
 
 interface NotificationData {
   itemName: string
+  coupon: number
   oldPrice: number
   newPrice: number
   symbol: string