From 267cb93ff3628cf2ede23331536bdba4d4f06ad7 Mon Sep 17 00:00:00 2001
From: K2 <stratus_chalet_0w@icloud.com>
Date: Sun, 2 Feb 2025 12:37:32 -0800
Subject: [PATCH] Add additional confirmation to link price changes and
 airplane purchase for significant changes

---
 airline-web/public/javascripts/airline.js  | 45 ++++++++++++++++++++--
 airline-web/public/javascripts/airplane.js | 20 +++++++++-
 2 files changed, 60 insertions(+), 5 deletions(-)

diff --git a/airline-web/public/javascripts/airline.js b/airline-web/public/javascripts/airline.js
index 4b80e4e98..12fe63807 100644
--- a/airline-web/public/javascripts/airline.js
+++ b/airline-web/public/javascripts/airline.js
@@ -2590,6 +2590,13 @@ function updateAirlineBaseList(airlineId, table) {
 	});
 }
 
+// A 'x' percent change in price is considered to be 'significant' and trigger additional confirmation.
+var SIGNIFICANT_PRICE_THRESHOLD_PERCENT = 50;
+
+function calculatePercentChange(existingValue, newValue){
+    return Math.abs(newValue - existingValue) / existingValue * 100;
+}
+
 var assignedDelegates = 0
 var availableDelegates = 0
 var negotiationOddsLookup
@@ -2655,6 +2662,7 @@ function linkConfirmation() {
     var planInfo = getPlanLinkCapacity()
     var planFrequency = planInfo.future ? planInfo.future.frequency : planInfo.current.frequency
 
+
 	for (i = 0 ; i < planFrequency ; i ++) {
 		var image = $("<img>")
 		image.attr("src", $(".frequencyBar").data("fillIcon"))
@@ -2671,10 +2679,41 @@ function linkConfirmation() {
         $("#linkConfirmationModal div.updating.capacity").append(futureCapacitySpan)
     }
 
+	const futurePrices = {
+		economy: parseInt($("#planLinkEconomyPrice").val()),
+		business: parseInt($("#planLinkBusinessPrice").val()),
+		first: parseInt($("#planLinkFirstPrice").val())
+	};
+	
+	const fareClasses = ["economy", "business", "first"];
+	var significantChanges = [];
+	
+	if (existingLink) {
+		fareClasses.forEach((fareClass) => {
+			const existingPrice = existingLink.price[fareClass];
+			const futurePrice = futurePrices[fareClass];
+		
+			const percentChange = calculatePercentChange(existingPrice, futurePrice);
+			if (percentChange >= SIGNIFICANT_PRICE_THRESHOLD_PERCENT) {
+				significantChanges.push(`${fareClass.charAt(0).toUpperCase() + fareClass.slice(1)}: $${existingPrice} -> $${futurePrice}`);
+			}
+		});
+	}
+	
+	$('#linkConfirmationModal .confirmButton').off('click');
+	if (significantChanges.length > 0) {
+		const confirmationPromptMessage = `≥${SIGNIFICANT_PRICE_THRESHOLD_PERCENT}% price change${significantChanges.length > 1 ? "s" : ""} detected:<ul>${significantChanges.map(change => `<li>${change}</li>`).join("")}</ul>`;
+		$('#linkConfirmationModal .confirmButton').on('click', function() {
+			promptConfirm(confirmationPromptMessage, createLink);
+			closeModal($('#linkConfirmationModal'));
+		});
+	} else {
+		$('#linkConfirmationModal .confirmButton').on('click', function() {
+			createLink()
+		});
+	}
 
-
-	$('#linkConfirmationModal div.updating.price').text('$' + $('#planLinkEconomyPrice').val() + " / $" + $('#planLinkBusinessPrice').val() + " / $" + $('#planLinkFirstPrice').val())
-
+	$('#linkConfirmationModal div.updating.price').text(toLinkClassValueString(futurePrices, '$'));
 	$('#linkConfirmationModal').fadeIn(200)
 
     getLinkNegotiation()
diff --git a/airline-web/public/javascripts/airplane.js b/airline-web/public/javascripts/airplane.js
index 1256986de..907a0e461 100644
--- a/airline-web/public/javascripts/airplane.js
+++ b/airline-web/public/javascripts/airplane.js
@@ -267,6 +267,9 @@ function validateAirplaneQuantity() {
     return quantity
 }
 
+// Threshold for determining if additional confirmation is required before completing an airplane purchase.
+var SIGNIFICANT_AIRPLANE_PURCHASE_THRESHOLD = 0.5;
+
 function promptBuyAirplane(modelId, condition, price, deliveryTime, explicitHomeAirportId, multipleAble, buyAirplaneFunction) {
     var model = loadedModelsById[modelId]
     if (model.imageUrl) {
@@ -293,10 +296,11 @@ function promptBuyAirplane(modelId, condition, price, deliveryTime, explicitHome
 	$('#buyAirplaneModal .price').text("$" + commaSeparateNumber(price))
 	$('#buyAirplaneModal .condition').text(condition + "%")
 
+    var quantity = 1;
 	if (multipleAble) {
 	    $('#buyAirplaneModal .quantity .input').val(1)
 	    $('#buyAirplaneModal .quantity .input').on('input', function(e){
-	        var quantity = validateAirplaneQuantity()
+	        quantity = validateAirplaneQuantity()
             updateAirplaneTotalPrice(quantity * price)
         });
 	    $('#buyAirplaneModal .quantity').show()
@@ -389,7 +393,19 @@ function promptBuyAirplane(modelId, condition, price, deliveryTime, explicitHome
                     selectedConfigurationId = $($("#buyAirplaneModal .configuration-options").children()[selectedIndex]).data("configurationId")
                 }
 
-                buyAirplaneFunction($('#buyAirplaneModal .quantity .input').val(), $("#buyAirplaneModal .homeOptions").find(":selected").val(), selectedConfigurationId)
+                var homeAirportId = $("#buyAirplaneModal .homeOptions").find(":selected").val();
+                
+                const totalPrice = quantity * price;
+                var percentOfBalance = totalPrice / activeAirline.balance;
+                if (percentOfBalance >= SIGNIFICANT_AIRPLANE_PURCHASE_THRESHOLD) {
+                    var confirmationMessage = `This purchase accounts for ${(percentOfBalance * 100).toFixed(1)}% of your airline's current balance. Are you sure you want to proceed?`;
+            
+                    promptConfirm(confirmationMessage, function() {
+                        buyAirplaneFunction(quantity, homeAirportId, selectedConfigurationId);
+                    });
+                } else {
+                    buyAirplaneFunction(quantity, homeAirportId, selectedConfigurationId);
+                }
             })
             $('#buyAirplaneModal').fadeIn(200)
         },