[CSM] implement client side mod loading (#5123)

* client side mods are located in clientmods/
* move builtin/preview.lua to clientmods/preview/init.lua as a preview mod
* refactor ModConfiguration class to work properly with client and server using child objects
* move some Server constructor mod load code to ModConfiguration to reduce code duplication between client and server
* remove mods.{cpp,h} unused functions
* use UNORDERED_SET instead of std::set in some modspec storages

1 files changed, 42 insertions, 0 deletions

diff --git a/clientmods/preview/init.lua b/clientmods/preview/init.lua
new file mode 100644
index 000000000..4c01d665f
--- /dev/null
+++ b/clientmods/preview/init.lua
@@ -0,0 +1,42 @@
+-- This is an example function to ensure it's working properly, should be removed before merge
+core.register_on_shutdown(function()
+	print("[PREVIEW] shutdown client")
+end)
+
+-- This is an example function to ensure it's working properly, should be removed before merge
+core.register_on_receiving_chat_messages(function(message)
+	print("[PREVIEW] Received message " .. message)
+	return false
+end)
+
+-- This is an example function to ensure it's working properly, should be removed before merge
+core.register_on_sending_chat_messages(function(message)
+	print("[PREVIEW] Sending message " .. message)
+	return false
+end)
+
+-- This is an example function to ensure it's working properly, should be removed before merge
+core.register_on_hp_modification(function(hp)
+	print("[PREVIEW] HP modified " .. hp)
+end)
+
+-- This is an example function to ensure it's working properly, should be removed before merge
+core.register_on_damage_taken(function(hp)
+	print("[PREVIEW] Damage taken " .. hp)
+end)
+
+-- This is an example function to ensure it's working properly, should be removed before merge
+core.register_globalstep(function(dtime)
+	-- print("[PREVIEW] globalstep " .. dtime)
+end)
+
+-- This is an example function to ensure it's working properly, should be removed before merge
+core.register_chatcommand("dump", {
+	func = function(param)
+		return true, dump(_G)
+	end,
+})
+
+core.after(2, function()
+	print("After 2")
+end)