gps: Add client-side calculation as an option

[gameplay]/gps/client.lua

@@ -1,12 +1,18 @@
 local floor = math.floor
+local currentRouteMode = "client"
 
 addCommandHandler('path',
 	function(command, node1, node2)
 		if not tonumber(node1) or not tonumber(node2) then
 			outputChatBox("Usage: /path node1 node2", 255, 0, 0)
 			return
 		end
-		local path = server.calculatePathByNodeIDs(tonumber(node1), tonumber(node2))
+		local path
+		if currentRouteMode == "client" then
+			path = calculatePathByNodeIDs(tonumber(node1), tonumber(node2))
+		elseif currentRouteMode == "server" then
+			path = server.calculatePathByNodeIDs(tonumber(node1), tonumber(node2))
+		end
 		if not path then
 			outputConsole('No path found')
 			return
@@ -30,7 +36,12 @@ addCommandHandler('path2',
 			return
 		end
 		local x,y,z = getElementPosition(localPlayer)
-		local path = server.calculatePathByCoords(x, y, z, tox, toy, toz)
+		local path
+		if currentRouteMode == "client" then
+			path = calculatePathByCoords(x, y, z, tox, toy, toz)
+		elseif currentRouteMode == "server" then
+			path = server.calculatePathByCoords(x, y, z, tox, toy, toz)
+		end
 		if not path then
 			outputConsole('No path found')
 			return

[gameplay]/gps/gps.lua

@@ -1,10 +1,11 @@
 local floor = math.floor
 
-local allowedRPC = {
-	calculatePathByCoords = true,
-	calculatePathByNodeIDs = true,
-	spawnPlayer = true
-}
+local file = fileOpen("vehiclenodes.json", true)
+local size = fileGetSize(file)
+vehicleNodes = fromJSON(fileRead(file, size))
+fileClose(file)
+
+outputDebugString("GPS: " .. (localPlayer and "Client" or "Server") .. " database loaded successfully!")
 
 local function getAreaID(x, y)
 	return floor((y + 3000)/750)*8 + floor((x + 3000)/750)
@@ -67,7 +68,6 @@ local function calculatePath(db, nodeFrom, nodeTo)
 			break
 		end
 
-		local successors = {}
 		for id,distance in pairs(current.neighbours) do
 			local successor = getNodeByID(db, id)
 			local successor_g = g[current] + distance*distance
@@ -113,21 +113,3 @@ function calculatePathByNodeIDs(node1, node2)
 		return false
 	end
 end
-
-addEvent('onServerCall', true)
-addEventHandler('onServerCall', root,
-	function(fnName, ...)
-		if allowedRPC[fnName] then
-			_G[fnName](...)
-		end
-	end
-)
-
-addEvent('onServerCallback', true)
-addEventHandler('onServerCallback', root,
-	function(crID, fnName, ...)
-		if allowedRPC[fnName] then
-			triggerClientEvent(source, 'onServerCallbackReply', resourceRoot, crID, _G[fnName](...))
-		end
-	end
-)

[gameplay]/gps/meta.xml

@@ -1,15 +1,21 @@
 <meta>
 	<info author="arc_" type="script" version="1.1.1" description="Calculates and displays the quickest road path between two points/nodes on the map. Commands: /path node1 node2 /path2 x y [z]. Resource contains export functions for custom logic."/>
 
+	<script src="MinHeap.lua" type="shared"/>
+	<script src="gps.lua" type="shared"/>
+
 	<script src="util.lua" type="client"/>
 	<script src="client.lua" type="client"/>
 	<script src="linedrawer.lua" type="client"/>
 
+	<script src="server.lua" type="server"/>
+
 	<file src="overlay.fx"/>
+	<file src="vehiclenodes.json"/>
 
-	<script src="vehiclenodes.lua" type="server"/>
-	<script src="MinHeap.lua" type="server"/>
-	<script src="gps.lua" type="server"/>
+  	<settings>
+        <setting name="*routeMode" value="client" accept="client,server" desc="Where should the route be calculated - on the client or the server?" />
+ 	</settings>
 
 	<export function="calculatePathByCoords" type="server"/> <!--calculatePathByCoords(float x1, float y1, float [z1], float x2,
 	float y2, float [z2]) 

[gameplay]/gps/server.lua

@@ -0,0 +1,50 @@
+local allowedRPC = {
+	calculatePathByCoords = true,
+	calculatePathByNodeIDs = true,
+	spawnPlayer = true
+}
+
+addEvent('onServerCall', true)
+addEventHandler('onServerCall', root,
+	function(fnName, ...)
+		if allowedRPC[fnName] then
+			if fnName == "calculatePathByCoords" or fnName == "calculatePathByNodeIDs" then
+				if get("routeMode") ~= "server" then
+					outputDebugString("SECURITY: " .. getPlayerName(client) .. " wanted to force server GPS even though client mode is active!", 2)
+					return 
+				end
+			end
+			_G[fnName](...)
+		end
+	end
+)
+
+addEvent('onServerCallback', true)
+addEventHandler('onServerCallback', root,
+	function(crID, fnName, ...)
+		if allowedRPC[fnName] then
+			if fnName == "calculatePathByCoords" or fnName == "calculatePathByNodeIDs" then
+				if get("routeMode") ~= "server" then
+					outputDebugString("SECURITY: " .. getPlayerName(client) .. " wanted to force server GPS even though client mode is active", 2)
+					triggerClientEvent(source, 'onServerCallbackReply', resourceRoot, crID, false)
+					return
+				end
+			end
+			triggerClientEvent(source, 'onServerCallbackReply', resourceRoot, crID, _G[fnName](...))
+		end
+	end
+)
+
+local function sendSettingsToClient(player)
+	local target = player or root
+    local mode = get("routeMode") or "client"
+    triggerClientEvent(target, "onClientReceiveGPSSetting", resourceRoot, mode)
+end
+
+addEventHandler("onResourceStart", resourceRoot, function()
+    sendSettingsToClient()
+end)
+
+addEventHandler("onPlayerJoin", root, function()
+    sendSettingsToClient(source)
+end)