[MIRROR] Clamps material market quantities & prices during cargo operations (#27146)

* Clamps material market quantities & prices during cargo operations (#82338)

## About The Pull Request
- Fixes #82329

Cargo operations means buying & selling materials on the market. Now
both their prices & quantities are clamped during these operations

Also increased the width of materials market UI so large numbers don't
overflow to the next line.

## Changelog
🆑
fix: buying & selling huge quantities of materials on the market won't
cause their prices & quantities to go beyond bounds.
/🆑

* Clamps material market quantities & prices during cargo operations

---------

Co-authored-by: SyncIt21 <110812394+SyncIt21@users.noreply.github.com>

code/controllers/subsystem/stock_market.dm

@@ -40,6 +40,37 @@ SUBSYSTEM_DEF(stock_market)
 	for(var/datum/stock_market_event/event as anything in active_events)
 		event.handle()
 
+///Adjust the price of a material(either through buying or selling) ensuring it stays within limits
+/datum/controller/subsystem/stock_market/proc/adjust_material_price(datum/material/mat, delta)
+	mat = GET_MATERIAL_REF(mat)
+
+	//adjust the price
+	var/new_price = materials_prices[mat.type] + delta
+
+	//get the limits
+	var/price_minimum = round(mat.value_per_unit * SHEET_MATERIAL_AMOUNT * 0.5)
+	if(!isnull(mat.minimum_value_override))
+		price_minimum = round(mat.minimum_value_override * SHEET_MATERIAL_AMOUNT)
+	var/price_maximum = round(mat.value_per_unit * SHEET_MATERIAL_AMOUNT * 3)
+
+	//clamp it down
+	new_price = round(clamp(new_price, price_minimum, price_maximum))
+	materials_prices[mat.type] = new_price
+
+///Adjust the amount of material(either through buying or selling) ensuring it stays within limits
+/datum/controller/subsystem/stock_market/proc/adjust_material_quantity(datum/material/mat, delta)
+	mat = GET_MATERIAL_REF(mat)
+
+	//adjust the quantity
+	var/new_quantity = materials_quantity[mat.type] + delta
+
+	//get the upper limit
+	var/quantity_baseline = mat.tradable_base_quantity
+
+	//clamp it down
+	new_quantity = round(clamp(new_quantity, 0, quantity_baseline * 2))
+	materials_quantity[mat.type] = new_quantity
+
 /**
  * Handles shifts in the cost of materials, and in what direction the material is most likely to move.
  */

code/modules/cargo/exports/materials.dm

@@ -139,19 +139,11 @@
 
 	//This formula should impact lower quantity materials greater, and higher quantity materials less. Still, it's  a bit rough. Tweaking may be needed.
 	if(!dry_run)
-		//this material is worthless. no point adding more to the stock
-		var/market_price = SSstock_market.materials_prices[material_id]
-		if(!market_price)
-			return
-
 		//decrease the market price
-		market_price -= round((market_price) * (amount / (amount + SSstock_market.materials_quantity[material_id])))
-		if(market_price < 0)
-			market_price = 0
-		SSstock_market.materials_prices[material_id] = market_price
+		SSstock_market.adjust_material_price(material_id, -SSstock_market.materials_prices[material_id] * (amount / (amount + SSstock_market.materials_quantity[material_id])))
 
 		//increase the stock
-		SSstock_market.materials_quantity[material_id] += amount
+		SSstock_market.adjust_material_quantity(material_id, amount)
 
 
 // Stock blocks are a special type of export that can be used to sell a quantity of materials at a specific price on the market.

code/modules/cargo/packs/_packs.dm

@@ -148,6 +148,7 @@
 		var/fraction = available_quantity
 		if(market_quantity != available_quantity) //to avoid division by zero error
 			fraction /= (market_quantity - available_quantity)
-		SSstock_market.materials_prices[material_type] += round(SSstock_market.materials_prices[material_type] * fraction)
+		SSstock_market.adjust_material_price(material_type, SSstock_market.materials_prices[material_type] * fraction)
+
 		//We decrease the quantity only after adjusting our prices for accurate values
-		SSstock_market.materials_quantity[material_type] -= available_quantity
+		SSstock_market.adjust_material_quantity(material_type, -available_quantity)

tgui/packages/tgui/interfaces/MatMarket.tsx

@@ -55,7 +55,7 @@ export const MatMarket = (props) => {
   const multiplier = orderingPrive ? 1.1 : 1;
 
   return (
-    <Window width={880} height={690}>
+    <Window width={1110} height={600}>
       <Window.Content scrollable>
         {!!catastrophe && <MarketCrashModal />}
         <Section
@@ -93,10 +93,10 @@ export const MatMarket = (props) => {
           <Section>
             <Stack>
               <Stack.Item width="15%">
-                Current Credit Balance: <b>{formatMoney(creditBalance)}</b> cr.
+                Balance: <b>{formatMoney(creditBalance)}</b> cr.
               </Stack.Item>
               <Stack.Item width="15%">
-                Current Order Cost: <b>{formatMoney(orderBalance)}</b> cr.
+                Order: <b>{formatMoney(orderBalance)}</b> cr.
               </Stack.Item>
               <Stack.Item
                 width="20%"