feat: persistent player vehicles

client/vehicle-persistence.lua

@@ -0,0 +1,73 @@
+if GetConvar('qbx:enable_vehicle_persistence', 'true') == 'false' then return end
+
+local cachedProps
+local netId
+local vehicle
+local seat
+
+local watchedKeys = {
+    'bodyHealth',
+    'engineHealth',
+    'tankHealth',
+    'fuelLevel',
+    'oilLevel',
+    'dirtLevel',
+    'windows',
+    'doors',
+    'tyres',
+}
+
+---Calculates the difference in values of two tables for the watched keys.
+---If the second table does not have a value that the first table has, it will be marked 'deleted'.
+---@param tbl1 table
+---@param tbl2 table
+---@return table diff
+---@return boolean hasChanged if diff table is not empty
+local function calculateDiff(tbl1, tbl2)
+    local diff = {}
+    local hasChanged = false
+
+    for i = 1, #watchedKeys do
+        local key = watchedKeys[i]
+        local val1 = tbl1[key]
+        local val2 = tbl2[key]
+
+        if val1 ~= val2 then
+            diff[key] = val2 == nil and 'deleted' or val2
+            hasChanged = true
+        end
+    end
+
+    return diff, hasChanged
+end
+
+local function sendPropsDiff()
+    local newProps = lib.getVehicleProperties(vehicle)
+    if not cachedProps then
+        cachedProps = newProps
+        return
+    end
+    local diff, hasChanged = calculateDiff(cachedProps, newProps)
+    cachedProps = newProps
+    if not hasChanged then return end
+    TriggerServerEvent('qbx_core:server:vehiclePropsChanged', netId, diff)
+end
+
+lib.onCache('seat', function(newSeat)
+    if newSeat == -1 then
+        seat = -1
+        vehicle = cache.vehicle
+        netId = NetworkGetNetworkIdFromEntity(vehicle)
+        CreateThread(function()
+            while seat == -1 do
+                sendPropsDiff()
+                Wait(10000)
+            end
+        end)
+    elseif seat == -1 then
+        seat = nil
+        sendPropsDiff()
+        vehicle = nil
+        netId = nil
+    end
+end)

fxmanifest.lua

@@ -23,6 +23,7 @@ client_scripts {
     'client/events.lua',
     'client/character.lua',
     'client/discord.lua',
+    'client/vehicle-persistence.lua',
     'bridge/qb/client/main.lua',
 }
 
@@ -36,6 +37,7 @@ server_scripts {
     'server/commands.lua',
     'server/loops.lua',
     'server/character.lua',
+    'server/vehicle-persistence.lua',
     'bridge/qb/server/main.lua',
 }
 

modules/lib.lua

@@ -316,7 +316,7 @@ if isServer then
         end
 
         local netId = NetworkGetNetworkIdFromEntity(veh)
-
+        TriggerEvent('qbx_core:server:vehicleSpawned', veh)
         return netId, veh
     end
 else

server/functions.lua

@@ -483,4 +483,17 @@ local function getGroupMembers(group, type)
     return storage.fetchGroupMembers(group, type)
 end
 
-exports('GetGroupMembers', getGroupMembers)
+exports('GetGroupMembers', getGroupMembers)
+
+---Disables persistence before deleting a vehicle, then deletes it.
+---@param vehicle number
+local function deleteVehicle(vehicle)
+    if DisablePersistence then
+        DisablePersistence(vehicle)
+    end
+    if DoesEntityExist(vehicle) then
+        DeleteEntity(vehicle)
+    end
+end
+
+exports('DeleteVehicle', deleteVehicle)

server/vehicle-persistence.lua

@@ -0,0 +1,112 @@
+if GetConvar('qbx:enable_vehicle_persistence', 'true') == 'false' then return end
+
+assert(lib.checkDependency('qbx_vehicles', '1.4.1', true))
+
+---@alias Entity number
+---@type table<Entity, boolean>
+local persistedVehicles = {}
+
+---A persisted vehicle will respawn when deleted. Only works for player owned vehicles.
+---Vehicles spawned using lib are automatically persisted
+---@param vehicle number
+local function enablePersistence(vehicle)
+    persistedVehicles[vehicle] = true
+end
+
+exports('EnablePersistence', enablePersistence)
+
+---A vehicle without persistence will not respawn when deleted.
+---@param vehicle number
+function DisablePersistence(vehicle)
+    persistedVehicles[vehicle] = nil
+end
+
+exports('DisablePersistence', DisablePersistence)
+
+local function getVehicleId(vehicle)
+    return Entity(vehicle).state.vehicleid or exports.qbx_vehicles:GetVehicleByIdPlate(GetVehicleNumberPlateText(vehicle))
+end
+
+RegisterNetEvent('qbx_core:server:vehiclePropsChanged', function(netId, diff)
+    local vehicle = NetworkGetEntityFromNetworkId(netId)
+
+    local vehicleId = getVehicleId(vehicle)
+    if not vehicleId then return end
+
+    local props = exports.qbx_vehicles:GetPlayerVehicle(vehicleId)?.props
+    if not props then return end
+
+    if diff.bodyHealth then
+        props.bodyHealth = GetVehicleBodyHealth(vehicle)
+    end
+
+    if diff.engineHealth then
+        props.engineHealth = GetVehicleEngineHealth(vehicle)
+    end
+
+    if diff.tankHealth then
+        props.tankHealth = GetVehiclePetrolTankHealth(vehicle)
+    end
+
+    if diff.fuelLevel then
+        props.fuelLevel = diff.fuelLevel ~= 'deleted' and diff.fuelLevel or nil
+    end
+
+    if diff.oilLevel then
+        props.oilLevel = diff.oilLevel ~= 'deleted' and diff.oilLevel or nil
+    end
+
+    if diff.dirtLevel then
+        props.dirtLevel = GetVehicleDirtLevel(vehicle)
+    end
+
+    if diff.windows then
+        props.windows = diff.windows ~= 'deleted' and diff.windows or nil
+    end
+
+    if diff.doors then
+        props.doors = diff.doors ~= 'deleted' and diff.doors or nil
+    end
+
+    if diff.tyres then
+        local damage = {}
+        for i = 0, 7 do
+            if IsVehicleTyreBurst(vehicle, i, false) then
+                damage[i] = IsVehicleTyreBurst(vehicle, i, true) and 2 or 1
+            end
+        end
+
+        props.tyres = damage
+    end
+
+    exports.qbx_vehicles:SaveVehicle(vehicle, {
+        props = props,
+    })
+end)
+
+AddEventHandler('qbx_core:server:vehicleSpawned', function(entity)
+    persistedVehicles[entity] = true
+end)
+
+AddEventHandler('entityRemoved', function(entity)
+    if not persistedVehicles(entity) then return end
+    local coords = GetEntityCoords(entity)
+    local heading = GetEntityHeading(entity)
+    local bucket = GetEntityRoutingBucket(entity)
+
+    local vehicleId = getVehicleId(entity)
+    if not vehicleId then return end
+    local playerVehicle = exports.qbx_vehicles:GetPlayerVehicle(vehicleId)
+    persistedVehicles[entity] = nil
+
+    if DoesEntityExist(entity) then
+        DeleteVehicle(entity)
+    end
+
+    qbx.spawnVehicle({
+        model = playerVehicle.props.model,
+        spawnSource = vec4(coords.x, coords.y, coords.z, heading),
+        bucket = bucket,
+        props = playerVehicle.props
+    })
+end)