Callback on delete messages

API.md

@@ -57,3 +57,4 @@ echo.send_event_to(player_name, {
 * `echo.register_on_send_event(function(event, notification))`: Called when an event is sent
   * You can get the target player in `event.to`.
 * `echo.register_on_read_message(function(event, notification))`: Called when an notification is read
+* `echo.register_on_delete_message(function(event, notification))`: Called when an notification is deleted

src/api.lua

@@ -50,6 +50,14 @@ function echo.register_on_read_message(func)
     echo.registered_on_read_message[#echo.registered_on_read_message + 1] = func
 end
 
+echo.registered_on_delete_message = {}
+function echo.register_on_delete_message(func)
+    assert(type(func) == "function", string.format(
+        "Invalid type fo argument func (function expected, got %s)", type(func)))
+
+    echo.registered_on_delete_message[#echo.registered_on_delete_message + 1] = func
+end
+
 -- source: https://gist.github.com/jrus/3197011
 local random = math.random
 local function new_uuid()

src/gui.lua

@@ -104,10 +104,14 @@ local function render_notif_row(event, notification)
                 on_event = function(e_player)
                     local e_name = e_player:get_player_name()
                     local storage = echo.get_notifications_entry(e_name)
+                    event = echo.get_event(event)
 
                     for i, s_event in ipairs(storage) do
                         if s_event == event then
                             table.remove(storage, i)
+                            for _, func in ipairs(echo.registered_on_delete_message) do
+                                func(event, echo.event_to_notification(event))
+                            end
                             echo.log_notifications_modification(e_name)
                             return true
                         end
@@ -185,6 +189,9 @@ echo.echo_gui = flow.make_gui(function(player, ctx)
 
                         for i=#e_storage, 1, -1 do
                             local e_event = e_storage[i]
+                            for _, func in ipairs(echo.registered_on_delete_message) do
+                                func(e_event, echo.event_to_notification(e_event))
+                            end
                             if os.date("%Y/%m/%d", e_event.time) == event_day then
                                 table.remove(e_storage, i)
                             end

src/on_send.lua

@@ -64,10 +64,13 @@ echo.register_on_send_event(function(event, notification)
     end
 end)
 
-echo.register_on_read_message(function(event)
+local function simple_update(event)
     local name = event.to
     local player = core.get_player_by_name(name)
     if player and huds[name] then
         update_hud(player)
     end
-end)
+end
+
+echo.register_on_read_message(simple_update)
+echo.register_on_delete_message(simple_update)

src/storage.lua

@@ -60,7 +60,10 @@ end
 ---@param name string The name of the player
 function echo.clear_notifications_entry(name)
     local storage = echo.get_notifications_entry(name)
-    for i in ipairs(storage) do
+    for i, event in ipairs(storage) do
+        for _, func in ipairs(echo.registered_on_delete_message) do
+            func(event, echo.event_to_notification(event))
+        end
         storage[i] = nil
     end
     echo.log_notifications_modification(name)