Question

14) Create an application called Tow Truck. The concept of this application should be similar to that of Uber, but instead of taxis we have tow trucks. That is, people would use this application to call a tow trucks via maps and location. State the program used and write the code (Note: the application should work).

We need to create an application which operates in the same way as uber but instead of ordering a cab people order tow trucks

Answer 1

-- These vehicles will be registered as "allowed/valid" tow trucks.
-- Change the x, y and z offset values for the towed vehicles to be attached to the tow truck.
-- x = left/right, y = forwards/backwards, z = up/down
local allowedTowModels = {
['flatbed'] = {x = 0.0, y = -0.85, z = 1.25}, -- default GTA V flatbed
['flatbed2'] = {x = 0.0, y = 0.0, z = 0.68}, -- addon flatbed2
['flatbed3'] = {x = 0.0, y = -1.2, z = 1.30}, -- addon flatbed3
}

local allowTowingBoats = false -- Set to true if you want to be able to tow boats.
local allowTowingPlanes = false -- Set to true if you want to be able to tow planes.
local allowTowingHelicopters = false -- Set to true if you want to be able to tow helicopters.
local allowTowingTrains = false -- Set to true if you want to be able to tow trains.
local allowTowingTrailers = true -- Disables trailers. NOTE: THIS ALSO DISABLES THE AIRTUG, TOWTRUCK, SADLER, AND ANY OTHER VEHICLE THAT IS IN THE UTILITY CLASS.

local currentlyTowedVehicle = nil

RegisterCommand("tow", function()
   TriggerEvent("tow")
end,false)

function isTargetVehicleATrailer(modelHash)
if GetVehicleClassFromName(modelHash) == 11 then
return true
else
return false
end
end

local xoff = 0.0
local yoff = 0.0
local zoff = 0.0

function isVehicleATowTruck(vehicle)
local isValid = false
for model,posOffset in pairs(allowedTowModels) do
if IsVehicleModel(vehicle, model) then
xoff = posOffset.x
yoff = posOffset.y
zoff = posOffset.z
isValid = true
break
end
end
return isValid
end

RegisterNetEvent('tow')
AddEventHandler('tow', function()
  
   local playerped = PlayerPedId()
   local vehicle = GetVehiclePedIsIn(playerped, true)
  
   local isVehicleTow = isVehicleATowTruck(vehicle)

   if isVehicleTow then

       local coordA = GetEntityCoords(playerped, 1)
       local coordB = GetOffsetFromEntityInWorldCoords(playerped, 0.0, 5.0, 0.0)
       local targetVehicle = getVehicleInDirection(coordA, coordB)
  

       Citizen.CreateThread(function()
           while true do
               Citizen.Wait(0)
               isVehicleTow = isVehicleATowTruck(vehicle)
               local roll = GetEntityRoll(GetVehiclePedIsIn(PlayerPedId(), true))
               if IsEntityUpsidedown(GetVehiclePedIsIn(PlayerPedId(), true)) and isVehicleTow or roll > 70.0 or roll < -70.0 then
                   DetachEntity(currentlyTowedVehicle, false, false)
                   currentlyTowedVehicle = nil
                   ShowNotification("~o~~h~Tow Service:~n~~s~Looks like the cables holding on the vehicle have broke!")
               end
  
           end
       end)

       if currentlyTowedVehicle == nil then
           if targetVehicle ~= 0 then
local targetVehicleLocation = GetEntityCoords(targetVehicle, true)
local towTruckVehicleLocation = GetEntityCoords(vehicle, true)
local distanceBetweenVehicles = GetDistanceBetweenCoords(targetVehicleLocation, towTruckVehicleLocation, false)
-- print(tostring(distanceBetweenVehicles)) -- debug only
       -- Distance allowed (in meters) between tow truck and the vehicle to be towed          
if distanceBetweenVehicles > 12.0 then
ShowNotification("~o~~h~Tow Service:~n~~s~Your cables can't reach this far. Move your tow truck closer to the vehicle.")
else
local targetModelHash = GetEntityModel(targetVehicle)
-- Check to make sure the target vehicle is allowed to be towed (see settings at lines 8-12)
if not ((not allowTowingBoats and IsThisModelABoat(targetModelHash)) or (not allowTowingHelicopters and IsThisModelAHeli(targetModelHash)) or (not allowTowingPlanes and IsThisModelAPlane(targetModelHash)) or (not allowTowingTrains and IsThisModelATrain(targetModelHash)) or (not allowTowingTrailers and isTargetVehicleATrailer(targetModelHash))) then
if not IsPedInAnyVehicle(playerped, true) then
if vehicle ~= targetVehicle and IsVehicleStopped(vehicle) then
-- TriggerEvent('chatMessage', '', {255,255,255}, xoff .. ' ' .. yoff .. ' ' .. zoff) -- debug line
AttachEntityToEntity(targetVehicle, vehicle, GetEntityBoneIndexByName(vehicle, 'bodyshell'), 0.0 + xoff, -1.5 + yoff, 0.0 + zoff, 0, 0, 0, 1, 1, 0, 1, 0, 1)
currentlyTowedVehicle = targetVehicle
ShowNotification("~o~~h~Tow Service:~n~~s~Vehicle has been loaded onto the flatbed.")
else
ShowNotification("~o~~h~Tow Service:~n~~s~There is currently no vehicle on the flatbed.")
end
else
ShowNotification("~o~~h~Tow Service:~n~~s~You need to be outside of your vehicle to load or unload vehicles.")
end
else
ShowNotification("~o~~h~Tow Service:~n~~s~Your tow truck is not equipped to tow this vehicle.")
end
end
else
ShowNotification("~o~~h~Tow Service:~n~~s~No towable vehicle detected.")
           end
       elseif IsVehicleStopped(vehicle) then
DetachEntity(currentlyTowedVehicle, false, false)
local vehiclesCoords = GetOffsetFromEntityInWorldCoords(vehicle, 0.0, -12.0, 0.0)
           SetEntityCoords(currentlyTowedVehicle, vehiclesCoords["x"], vehiclesCoords["y"], vehiclesCoords["z"], 1, 0, 0, 1)
           SetVehicleOnGroundProperly(currentlyTowedVehicle)
           currentlyTowedVehicle = nil
           ShowNotification("~o~~h~Tow Service:~n~~s~Vehicle has been unloaded from the flatbed.")
       end
   else
ShowNotification("~o~~h~Tow Service:~n~~s~Your vehicle is not registered as an official tow truck.")
end
end)

function getVehicleInDirection(coordFrom, coordTo)
   local rayHandle = CastRayPointToPoint(coordFrom.x, coordFrom.y, coordFrom.z, coordTo.x, coordTo.y, coordTo.z, 10, PlayerPedId(), 0)
   local a, b, c, d, vehicle = GetRaycastResult(rayHandle)
   return vehicle
end

function ShowNotification(text)
   SetNotificationTextEntry("STRING")
AddTextComponentSubstringPlayerName(text)
   DrawNotification(false, false)
end