Release v3

.github/workflows/ci_workflow.yml

@@ -0,0 +1,26 @@
+name: Run tests
+
+on: [push]
+
+jobs:
+    build_and_run:
+        name: Build and run tests
+        runs-on: ubuntu-latest
+        steps:
+          - uses: actions/checkout@v2
+            with:
+                lfs: true
+          - uses: actions/setup-java@v1
+            with:
+                java-version: '17'
+
+          - name: Build && Run
+            run: |
+              deployer_url="https://raw.githubusercontent.com/Insality/defold-deployer/4/deployer.sh"
+              curl -s ${deployer_url} | bash -s lbd --headless --settings ./test/test.ini
+
+          - name: Upload coverage reports to Codecov
+            uses: codecov/codecov-action@v4.0.1
+            with:
+              token: ${{ secrets.CODECOV_TOKEN }}
+              slug: insality/defold-event

.gitignore

@@ -4,3 +4,10 @@
 Thumbs.db
 manifest.private.der
 manifest.public.der
+
+deployer_version_settings.txt
+
+.deployer_cache
+bob.jar
+deployer_build_stats.csv
+dist

.vscode/settings.json

@@ -0,0 +1,11 @@
+{
+	"Lua.diagnostics.globals": [
+		"lua_script_instance",
+		"sys",
+		"init",
+		"describe",
+		"before",
+		"after",
+		"it"
+	]
+}

README.md

@@ -1,8 +1,10 @@
 ![](media/logo.png)
 
-[![Github-sponsors](https://img.shields.io/badge/sponsor-30363D?style=for-the-badge&logo=GitHub-Sponsors&logoColor=#EA4AAA)](https://github.com/sponsors/insality) [![Ko-Fi](https://img.shields.io/badge/Ko--fi-F16061?style=for-the-badge&logo=ko-fi&logoColor=white)](https://ko-fi.com/insality) [![BuyMeACoffee](https://img.shields.io/badge/Buy%20Me%20a%20Coffee-ffdd00?style=for-the-badge&logo=buy-me-a-coffee&logoColor=black)](https://www.buymeacoffee.com/insality)
-
 [![GitHub release (latest by date)](https://img.shields.io/github/v/tag/insality/defold-event?style=for-the-badge&label=Release)](https://github.com/Insality/defold-event/tags)
+[![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/insality/defold-event/ci-workflow.yml?branch=master&style=for-the-badge)](https://github.com/Insality/defold-event/actions)
+[![codecov](https://img.shields.io/codecov/c/github/Insality/defold-event?style=for-the-badge)](https://codecov.io/gh/Insality/defold-event)
+
+[![Github-sponsors](https://img.shields.io/badge/sponsor-30363D?style=for-the-badge&logo=GitHub-Sponsors&logoColor=#EA4AAA)](https://github.com/sponsors/insality) [![Ko-Fi](https://img.shields.io/badge/Ko--fi-F16061?style=for-the-badge&logo=ko-fi&logoColor=white)](https://ko-fi.com/insality) [![BuyMeACoffee](https://img.shields.io/badge/Buy%20Me%20a%20Coffee-ffdd00?style=for-the-badge&logo=buy-me-a-coffee&logoColor=black)](https://www.buymeacoffee.com/insality)
 
 
 # Event
@@ -26,7 +28,7 @@
 
 Open your `game.project` file and add the following line to the dependencies field under the project section:
 
-**[Event v2](https://github.com/Insality/defold-event/archive/refs/tags/2.zip)**
+**[Event v3](https://github.com/Insality/defold-event/archive/refs/tags/2.zip)**
 
 ```
 https://github.com/Insality/defold-event/archive/refs/tags/2.zip
@@ -70,6 +72,7 @@ Memory allocation tracking is turned off in release builds, regardless of the `g
 ### Quick API Reference
 
 ```lua
+-- Event Module
 event.set_logger(logger)
 event.create(callback, [callback_context])
 event:subscribe(callback, [callback_context])
@@ -78,10 +81,13 @@ event:is_subscribed(callback, [callback_context])
 event:trigger(...)
 event:is_empty()
 event:clear()
+
+-- Global Events Module
 events.subscribe(name, callback, [callback_context])
 events.unsubscribe(name, callback, [callback_context])
 events.is_subscribed(name, callback, [callback_context])
 events.trigger(name, ...)
+events.is_empty(name)
 events.clear(name)
 events.clear_all()
 ```
@@ -228,6 +234,8 @@ Trigger the event, causing all subscribed callbacks to be executed.
 
 - **Parameters:** Any number of parameters to be passed to the subscribed callbacks.
 
+- **Return Value:** The return value of the last callback executed.
+
 - **Usage Example:**
 
 ```lua
@@ -351,6 +359,24 @@ Throw a global event with the specified name. All subscribed callbacks will be e
 events.trigger("on_game_over", "arg1", "arg2")
 ```
 
+**events.is_empty**
+---
+```lua
+events.is_empty(name)
+```
+Check if the specified global event has no subscribed callbacks.
+
+- **Parameters:**
+  - `name`: The name of the global event to check.
+
+- **Return Value:** `true` if the global event has no subscribed callbacks, `false` otherwise.
+
+- **Usage Example:**
+
+```lua
+local is_empty = events.is_empty("on_game_over")
+```
+
 **events.clear**
 ---
 ```lua
@@ -425,6 +451,15 @@ If you have any issues, questions or suggestions please [create an issue](https:
 	- The `event:subscribe` and `event:unsubscribe` now return boolean value of success
 </details>
 
+### **V3**
+<details>
+	<summary><b>Changelog</b></summary>
+
+	- Event Trigger now returns value of last executed callback
+	- Add `events.is_empty(name)` function
+	- Add tests for Event and Global Events modules
+</details>
+
 
 ## ❤️ Support project ❤️
 

USE_CASES.md

@@ -42,6 +42,7 @@ function final(self)
 end
 ```
 
+
 ### 2. Component-specific Events
 
 Design components with built-in events, enabling customizable behavior for instances of the component. This is particularly useful for UI elements like buttons where you want to bind specific actions to events like clicks.
@@ -85,3 +86,28 @@ function init(self)
 end
 
 ```
+
+
+### 3. Lua annotations
+
+You can use annotations to document your events and make them easier to understand.
+
+```lua
+---This event is triggered when the sound button is clicked.
+---@class event.on_sound_click: event
+---@field trigger fun(_, is_sound_on: boolean): boolean|nil
+---@field subscribe fun(_, callback: fun(is_sound_on: boolean): boolean, _): boolean
+
+local event = require("event.event")
+
+---@type event.on_sound_click
+local on_sound_click = event.create()
+
+-- This callback params will be checked by Lua linter
+on_sound_click:subscribe(function(is_sound_on)
+	print("Sound is on: ", is_sound_on)
+end)
+
+-- Trigger params will be checked by Lua linter
+on_sound_click:trigger(true)
+```

event/annotations.lua

@@ -0,0 +1,24 @@
+---@class event
+---@field create fun(callback: function|nil, callback_context: any|nil): event
+---@field subscribe fun(self: event, callback: function, callback_context: any|nil): boolean
+---@field unsubscribe fun(self: event, callback: function, callback_context: any|nil): boolean
+---@field is_subscribed fun(self: event, callback: function, callback_context: any|nil): boolean
+---@field trigger fun(self: event, a: any, b: any, c: any, d: any, e: any, f: any, g: any, h: any, i: any, j: any): nil
+---@field clear fun(self: event): nil
+---@field is_empty fun(self: event): boolean
+
+---@class events
+---@field subscribe fun(event_name: string, callback: function, callback_context: any|nil): boolean
+---@field unsubscribe fun(event_name: string, callback: function, callback_context: any|nil): boolean
+---@field is_subscribed fun(event_name: string, callback: function, callback_context: any|nil): boolean
+---@field trigger fun(event_name: string, ...: any): any @Result of the last callback
+---@field clear fun(name: string): nil
+---@field clear_all fun(): nil
+---@field is_empty fun(name: string): boolean
+
+---@class event.logger
+---@field trace fun(logger: event.logger, message: string, data: any|nil)
+---@field debug fun(logger: event.logger, message: string, data: any|nil)
+---@field info fun(logger: event.logger, message: string, data: any|nil)
+---@field warn fun(logger: event.logger, message: string, data: any|nil)
+---@field error fun(logger: event.logger, message: string, data: any|nil)

event/event.lua

@@ -5,13 +5,14 @@ if not IS_DEBUG then
 	MEMORY_THRESHOLD_WARNING = 0
 end
 
+
 ---@class event @Event Module
----@field callbacks table<number, table>
 local M = {}
 
 --- Use empty function to save a bit of memory
 local EMPTY_FUNCTION = function(_, message, context) end
 
+---@type event.logger
 M.logger =  {
 	trace = EMPTY_FUNCTION,
 	debug = EMPTY_FUNCTION,
@@ -21,7 +22,7 @@ M.logger =  {
 }
 
 
----@param logger_instance logger
+---@param logger_instance event.logger
 function M.set_logger(logger_instance)
 	M.logger = logger_instance
 end
@@ -31,12 +32,13 @@ end
 ---Create new event instance. If callback is passed, it will be subscribed to the event.
 ---@param callback function|nil
 ---@param callback_context any|nil
+---@return event
 function M.create(callback, callback_context)
 	local instance = setmetatable({
 		_mapping = nil, -- Used for memory threshold warning, only in debug mode
 		callbacks = nil,
 	}, {
-		__index = M
+		__index = M,
 	})
 
 	if callback then
@@ -123,25 +125,20 @@ function M:is_subscribed(callback, callback_context)
 end
 
 
----Trigger the event. All subscribed callbacks will be called in the order they were subscribed.
----@param a any
----@param b any
----@param c any
----@param d any
----@param e any
----@param f any
----@param g any
----@param h any
----@param i any
----@param j any
 local last_used_memory = 0
-function M:trigger(a, b, c, d, e, f, g, h, i, j)
+
+---Trigger the event. All subscribed callbacks will be called in the order they were subscribed.
+---@vararg any
+---@return any @Result of the last triggered callback
+function M:trigger(...)
 	if not self.callbacks then
 		return
 	end
 
 	local current_script_context = lua_script_instance.Get()
 
+	local result = nil
+
 	for index = 1, #self.callbacks do
 		local callback = self.callbacks[index]
 
@@ -153,11 +150,11 @@ function M:trigger(a, b, c, d, e, f, g, h, i, j)
 			last_used_memory = collectgarbage("count")
 		end
 
-		local ok, errors
+		local ok, result_or_error
 		if callback.callback_context then
-			ok, errors = pcall(callback.callback, callback.callback_context, a, b, c, d, e, f, g, h, i, j)
+			ok, result_or_error = pcall(callback.callback, callback.callback_context, ...)
 		else
-			ok, errors = pcall(callback.callback, a, b, c, d, e, f, g, h, i, j)
+			ok, result_or_error = pcall(callback.callback, ...)
 		end
 
 		if current_script_context ~= callback.script_context then
@@ -166,9 +163,12 @@ function M:trigger(a, b, c, d, e, f, g, h, i, j)
 
 		if not ok then
 			local traceback = debug.traceback()
-			M.logger:error("An error occurred during event processing", { errors = errors, traceback = traceback })
+			M.logger:error("An error occurred during event processing", { errors = result_or_error, traceback = traceback })
 			-- Print again cause it's just better to see it in the console
-			print(traceback)
+			pprint(result_or_error)
+			pprint(traceback)
+		else
+			result = result_or_error
 		end
 
 		if MEMORY_THRESHOLD_WARNING > 0 then
@@ -182,6 +182,8 @@ function M:trigger(a, b, c, d, e, f, g, h, i, j)
 			end
 		end
 	end
+
+	return result
 end
 
 

event/events.lua

@@ -9,6 +9,7 @@ M.events = {}
 ---Throws the event
 ---@param event_name string Event name
 ---@vararg any @Event params
+---@return any @Result of the last triggered callback
 function M.trigger(event_name, ...)
 	local event = M.events[event_name]
 
@@ -18,7 +19,7 @@ function M.trigger(event_name, ...)
 	})
 
 	if event then
-		event:trigger(...)
+		return event:trigger(...)
 	end
 end
 
@@ -87,4 +88,16 @@ function M.is_subscribed(event_name, callback, callback_context)
 end
 
 
+---Check if the event is empty
+---@param event_name string Event name
+---@return boolean @True if event is empty. If event is not exist, return true
+function M.is_empty(event_name)
+	if not M.events[event_name] then
+		return true
+	end
+
+	return M.events[event_name]:is_empty()
+end
+
+
 return M

game.project

@@ -1,5 +1,5 @@
 [bootstrap]
-main_collection = /example/example.collectionc
+main_collection = /test/test.collectionc
 
 [script]
 shared_state = 1
@@ -13,10 +13,11 @@ input_method = HiddenInputField
 
 [project]
 title = Defold Event
-version = 1
+version = 3
 publisher = Insality
 developer = Maksim Tuprikov, Insality
 dependencies#0 = https://github.com/Insality/defold-log/archive/refs/tags/2.zip
+dependencies#1 = https://github.com/britzl/deftest/archive/refs/tags/2.8.0.zip
 
 [library]
 include_dirs = event

settings_deployer

@@ -0,0 +1,14 @@
+# Path to bob folder. It will find and save new bob.jar files inside
+bob_folder=./
+
+# You can point bob version for project in format "filename:sha"
+bob_sha="181:fd1ad4c17bfdcd890ea7176f2672c35102384419"
+
+# Select Defold channel. Values: stable, beta, alpha
+bob_channel="stable"
+
+# If true, it will check and download latest bob version. It will ignore bob_sha param
+use_latest_bob=false
+
+# Select Defold build server
+build_server="https://build.defold.com"