Add command architecture

src/commands.rb

@@ -0,0 +1,4 @@
+require_relative "commands/command"
+require_relative "commands/help_command"
+require_relative "commands/lesson_command"
+require_relative "commands/stop_lesson_command"

src/commands/command.rb

@@ -0,0 +1,47 @@
+module Commands
+  @@commands = []
+
+  def self.register_command(command_class)
+    @@commands << command_class
+  end
+
+  def self.registered_commands
+    @@commands
+  end
+
+  class Command
+    def self.inherited(klass)
+      p klass
+      Commands.register_command klass
+    end
+
+    def self.for(ika, message)
+      Commands.registered_commands.find do |command_class|
+        command_class.matches? message.message.content
+      end&.new(ika, message)
+    end
+
+    def self.matches?(message_text)
+      message_text == "!#{command_string}"
+    end
+
+    def self.help
+      "!#{command_string} - #{description}"
+    end
+
+    def self.description
+      "blah blah blah"
+    end
+
+    attr_reader :ika, :message
+
+    def initialize(ika, message)
+      @ika = ika
+      @message = message
+    end
+
+    def execute
+      puts "This is a generic command! I can't execute anything!"
+    end
+  end
+end

src/commands/help_command.rb

@@ -0,0 +1,16 @@
+module Commands
+  class Help < Command
+    def self.command_string
+      "help"
+    end
+
+    def self.description
+      "Shows you a list of available commands"
+    end
+
+    def execute
+      message.respond ["I'm Ika! Here are the commands I know:",
+       *Commands.registered_commands.map(&:help)].join("\n")
+    end
+  end
+end

src/commands/lesson_command.rb

@@ -0,0 +1,18 @@
+module Commands
+  class LessonCommand < Command
+    def self.command_string
+      "lesson"
+    end
+
+    def self.description
+      "Starts timers for a lesson"
+    end
+
+    def execute
+      return message.respond("There's already a lesson running!") if ika.current_lesson_running?
+
+      message.respond("Starting a lesson now!")
+      ika.start_lesson! message
+    end
+  end
+end

src/commands/stop_lesson_command.rb

@@ -0,0 +1,18 @@
+module Commands
+  class StopLessonCommand < Command
+    def self.command_string
+      "stoplesson"
+    end
+
+    def self.description
+      "Stops the current lesson, if one is running"
+    end
+
+    def execute
+      return message.respond("There's no lesson running") unless ika.current_lesson_running?
+
+      message.respond("Ending the current lesson!")
+      ika.stop_current_lesson!
+    end
+  end
+end

src/ika.rb

@@ -1,5 +1,6 @@
 require_relative './session'
 require_relative './lesson'
+require_relative './commands'
 
 class Ika
   attr_reader :bot
@@ -24,25 +25,33 @@ class Ika
     bot.run # you can run this in the background, idk
   end
 
-  def end!
+  def stop!
     bot.remove_handler @message_handler if @message_handler
   end
 
-  def handle_message message
+  def current_lesson_running?
+    current_lesson.running?
+  end
+
+  def start_lesson!(message)
+    current_lesson.start!(message.channel)
+  end
+
+  def stop_current_lesson!
+    current_lesson.stop!
+  end
+
+  def handle_message(message)
+    if command = Commands::Command.for(self, message)
+      command.execute
+    end
+
+    return current_session&.respond_to message
+
     if message.message.content == "!init"
       return message.respond("There's already a session running") unless current_session.nil?
 
       return current_session = Session.new(message, event.message.author)
-   elsif message.message.content == "!lesson"
-     return message.respond("There's already a lesson running") if current_lesson.running?
-
-     message.respond("Starting a lesson now!")
-     return current_lesson.start!(message.channel)
-   elsif message.message.content == "!stoplesson"
-     return message.respond("There's no lesson running") unless current_lesson.running?
-
-     message.respond("Ending the current lesson!")
-     return current_lesson.stop!
     end
   end
 end