fire_bullets event fixes

originally from #1350, we kind of forgot about it and OP deleted his repo

the fixes consist of renaming the variable find injected in the callback function (stopping error spam as it was expected to be read as find_ammo) and adding some hackery to make the event work when in singleplayer

also adding enums for the ammo names

but many addon weapons I tested don't seem to work to begin with, maybe they don't call the FireBullets hook in the first place

lua/pac3/core/client/parts/event.lua

@@ -1589,13 +1589,31 @@ PART.OldEvents = {
 
 	fire_bullets = {
 		operator_type = "string", preferred_operator = "find simple",
-		tutorial_explanation = "fire_bullets supposedly checks what types of bullets you're firing",
+		tutorial_explanation = "fire_bullets checks what types of bullets you're firing.\nDoesn't seem to work with many addon weapons. The event relies on the FireBullets hook",
 		arguments = {{find_ammo = "string"}, {time = "number"}},
-		callback = function(self, ent, find, time)
+		userdata = {{default = "AR2", enums = function()
+			local tbl = {}
+			for i=-1,512,1 do
+				local name = game.GetAmmoName(i)
+				if name then
+					tbl[name .. " (ID ="..i..")"] = name
+				end
+			end
+			return tbl
+		end}, {default = 0.1}},
+		callback = function(self, ent, find_ammo, time)
 			time = time or 0.1
 
 			ent = try_viewmodel(ent)
 
+			if game.SinglePlayer() then
+				if self:GetPlayerOwner() == pac.LocalPlayer then
+					if ent.pac_hide_bullets ~= ent:GetNWBool("pac_hide_bullets", false) then
+						net.Start("pac_hide_bullets_get") net.WriteBool(ent.pac_hide_bullets) net.SendToServer()
+					end
+				end
+			end
+
 			local data = ent.pac_fire_bullets
 			local b = false
 
@@ -3561,16 +3579,27 @@ pac.AddHook("EntityEmitSound", "emit_sound", function(data)
 	end
 end)
 
-pac.AddHook("EntityFireBullets", "firebullets", function(ent, data)
-	if not ent:IsValid() or not ent.pac_has_parts then return end
-	ent.pac_fire_bullets = {name = data.AmmoType, time = pac.RealTime, reset = true}
+if game.SinglePlayer() then
+	net.Receive("pac_fire_bullets_for_singleplayer", function()
+		local ent = net.ReadEntity()
+		if not ent:IsValid() or not ent.pac_has_parts then return end
+		local ammo_type = net.ReadUInt(8)
+		ent.pac_fire_bullets = {name = game.GetAmmoName(ammo_type), time = pac.RealTime, reset = true}
 
-	pac.CallRecursiveOnAllParts("OnFireBullets")
+		pac.CallRecursiveOnAllParts("OnFireBullets")
+	end)
+else
+	pac.AddHook("EntityFireBullets", "firebullets", function(ent, data)
+		if not ent:IsValid() or not ent.pac_has_parts then return end
+		ent.pac_fire_bullets = {name = data.AmmoType, time = pac.RealTime, reset = true}
 
-	if ent.pac_hide_bullets then
-		return false
-	end
-end)
+		pac.CallRecursiveOnAllParts("OnFireBullets")
+
+		if ent.pac_hide_bullets then
+			return false
+		end
+	end)
+end
 
 --for regaining focus on cameras from first person, hacky thing to not loop through localparts every time
 --only if the received command name matches that of a camera's linked command event

lua/pac3/core/server/net_messages.lua

@@ -3,6 +3,8 @@ util.AddNetworkString("pac.AllowPlayerButtons")
 util.AddNetworkString("pac.BroadcastPlayerButton")
 util.AddNetworkString("pac_chat_typing_mirror")
 util.AddNetworkString("pac_chat_typing_mirror_broadcast")
+util.AddNetworkString("pac_fire_bullets_for_singleplayer")
+util.AddNetworkString("pac_hide_bullets_get")
 
 do -- button event
 	net.Receive("pac.AllowPlayerButtons", function(length, client)
@@ -39,3 +41,15 @@ net.Receive("pac_chat_typing_mirror", function(len, ply)
 	net.WriteEntity(ply)
 	net.Broadcast()
 end)
+
+if game.SinglePlayer() then
+	hook.Add("EntityFireBullets", "pac_bullet_singleplayer_hack", function(ent, data)
+		if ent:IsPlayer() then
+			net.Start("pac_fire_bullets_for_singleplayer") net.WriteEntity(ent) net.WriteUInt(game.GetAmmoID(data.AmmoType),8) net.Broadcast()
+		end
+		if ent:GetNWBool("pac_hide_bullets", false) then return false end
+	end)
+	net.Receive("pac_hide_bullets_get", function(len, ply)
+		ply:SetNWBool("pac_hide_bullets",net.ReadBool())
+	end)
+end