Load additional pages via NC Mall scraper service

This is for URLs like this! https://ncmall.neopets.com/mall/ajax/load_page.phtml?type=browse&cat=43&lang=en

app/services/nc_mall.rb

@@ -1,3 +1,4 @@
+require "addressable/template"
 require "async/http/internet/instance"
 
 module NCMall
@@ -8,22 +9,34 @@ module NCMall
 	# Load the NC home page, and return its useful data.
 	HOME_PAGE_URL = "https://ncmall.neopets.com/mall/ajax/home_page.phtml"
 	def self.load_home_page
-		response = Sync do
+		load_page_by_url HOME_PAGE_URL
-			INTERNET.get(HOME_PAGE_URL, [
+	end
-				["User-Agent", Rails.configuration.user_agent_for_neopets],
-			])
-		end
 
-		if response.status != 200
+	# Load the NC Mall page for a specific type and category ID.
-			raise ResponseNotOK.new(response.status),
+	CATEGORY_PAGE_URL_TEMPLATE = Addressable::Template.new(
-				"expected status 200 but got #{response.status} (#{HOME_PAGE_URL})"
+		"https://ncmall.neopets.com/mall/ajax/load_page.phtml?lang=en{&type,cat}"
-		end
+	)
-
+	def self.load_page(type, cat)
-		parse_nc_page response.body.read
+		load_page_by_url CATEGORY_PAGE_URL_TEMPLATE.expand(type:, cat:)
 	end
 
 	private
 
+	def self.load_page_by_url(url)
+		Sync do
+			response = INTERNET.get(url, [
+				["User-Agent", Rails.configuration.user_agent_for_neopets],
+			])
+
+			if response.status != 200
+				raise ResponseNotOK.new(response.status),
+					"expected status 200 but got #{response.status} (#{url})"
+			end
+
+			parse_nc_page response.read
+		end
+	end
+
 	# Given a string of NC page data, parse the useful data out of it!
 	def self.parse_nc_page(nc_page_str)
 		begin