Move lessons to a plugin

lib/ika.rb

@@ -1,45 +1,26 @@
 require_relative './session'
-require_relative './lesson'
-require_relative './commands'
 require_relative './message'
 require_relative './drill_plugin'
+require_relative './ika/plugin'
 
 class Ika
-  attr_reader :handler
-  attr_reader :lessons, :sessions
-  attr_accessor :current_lesson, :current_session
-  attr_reader :drill_plugin
+  attr_reader :plugins
+
+  PLUGIN_TYPES = [
+    Plugin::HelpPlugin,
+    Plugin::LessonPlugin
+  ]
 
   def self.for(type:, **kwargs)
     type.new **kwargs
   end
 
   def initialize
-    @lessons = {}
-    @sessions = {}
     @current_session = nil
-    @current_lesson = Lesson.new(responder: responder(nil))
-    @drill_plugin = DrillPlugin.new(self)
-  end
-
-  def current_lesson_running?
-    current_lesson.running?
-  end
-
-  def start_lesson!(message)
-    current_lesson.responder = responder(message.channel)
-    current_lesson.start!(message.channel)
-  end
-
-  def stop_current_lesson!
-    current_lesson.stop!
+    @plugins = PLUGIN_TYPES.map { |plugin_type| plugin_type.new self }
   end
 
   def handle_message(message)
-    if command = Commands::Command.for(self, message)
-      command.execute
-    end
-
-    # drill_plugin.handle_message message
+    plugins.find { |plugin| plugin.handle_message message }
   end
 end

lib/ika/plugin.rb

@@ -0,0 +1,18 @@
+require_relative "./plugin/help_plugin"
+require_relative "./plugin/lesson_plugin"
+
+class Plugin
+  attr_reader :ika
+
+  def initialize(ika)
+    @ika = ika
+  end
+
+  def handle_message(message)
+    can_handle_message? message
+  end
+
+  def can_handle_message?(_)
+    false
+  end
+end

lib/ika/plugin/help_plugin.rb

@@ -0,0 +1,14 @@
+class Plugin
+  class HelpPlugin < Plugin
+    def handle_message(message)
+      return false unless super
+      
+      message.respond "I'm beyond help"
+    end
+
+    def can_handle_message?(message)
+      message.content == "!help"
+    end
+  end
+end
+    

lib/ika/plugin/lesson_plugin.rb

@@ -0,0 +1,80 @@
+require_relative "../../lesson"
+
+class Plugin
+  class LessonPlugin < Plugin
+    attr_reader :lessons
+
+    def initialize(ika)
+      super
+      @lessons = {}
+    end
+
+    def handle_message(message)
+      super
+      Message.new(self, message).handle
+    end
+
+    def can_handle_message?(message)
+      return true if message.content == "!lesson"
+      return true if message.content == "!stoplesson"
+
+      return false unless lessons[message.channel.id]
+
+      true
+    end
+
+    class Message
+      attr_reader :plugin, :message
+
+      def initialize(plugin, message)
+        @plugin = plugin
+        @message = message
+      end
+
+      def content
+        message.content
+      end
+
+      def responder
+        message.responder
+      end
+
+      def respond(response)
+        responder.call response
+      end
+
+      def handle
+        return handle_lesson if content == "!lesson"
+        return handle_stoplesson if content == "!stoplesson"
+
+        lesson.handle_message(message)
+      end
+
+      def lesson
+        lsn = plugin.lessons[message.channel.id]
+        return lsn if lsn
+
+        lsn = Lesson.new responder: responder
+        plugin.lessons[message.channel.id] = lsn
+      end
+
+      def handle_lesson
+        if lesson.running?
+          respond "There's already a lesson running!"
+        else
+          respond "Starting a lesson now!"
+          lesson.start!
+        end
+      end
+
+      def handle_stoplesson
+        if lesson.running?
+          respond "Ending the current lesson"
+          lesson.stop!
+        else
+          respond "There's no lesson running"
+        end
+      end
+    end
+  end
+end

lib/lesson.rb

@@ -20,9 +20,10 @@ class Lesson
 
   def stop!
     @scheduler.shutdown
+    @running = false
   end
 
-  def start!(channel)
+  def start!
     lesson_plan.each_with_index do |(time, message), index|
       offset = lesson_plan.map(&:first)[0..index - 1].sum(0)
       offset = 0 if index == 0
@@ -43,4 +44,8 @@ class Lesson
   def running?
     running
   end
+
+  def handle_message(_)
+    # TODO: make it possible to advance the lesson or whatever
+  end
 end