Automatically mount provider’s engines at /chat-integration/{provider_name}

Provider controllers are automatically disabled when the provider is disabled (works the same way as plugin controllers)

lib/discourse_chat/provider.rb

@@ -21,6 +21,10 @@ module DiscourseChat
       end
     end
 
+    def self.enabled_provider_names
+      self.enabled_providers.map {|x| x::PROVIDER_NAME}
+    end
+
     def self.get_by_name(name)
       self.providers.find{|p| p::PROVIDER_NAME == name}
     end
@@ -33,6 +37,51 @@ module DiscourseChat
       end
     end
 
+    class HookEngine < ::Rails::Engine
+      engine_name DiscourseChat::PLUGIN_NAME+"-hooks"
+      isolate_namespace DiscourseChat::Provider
+    end
+
+    class HookController < ::ApplicationController
+      requires_plugin DiscourseChat::PLUGIN_NAME
+
+      class ProviderDisabled < StandardError; end
+
+      rescue_from ProviderDisabled  do
+        rescue_discourse_actions(:not_found, 404)
+      end
+
+      def self.requires_provider(provider_name)
+        before_filter do
+          raise ProviderDisabled.new unless Provider.enabled_provider_names.include?(provider_name)
+        end
+      end
+
+      def respond
+        render 
+      end
+    end
+
+    # Automatically mount each provider's engine inside the HookEngine
+    def self.mount_engines
+      engines = []
+      DiscourseChat::Provider.providers.each do |provider|
+        engine = provider.constants.select do |constant|
+          constant.to_s =~ /Engine$/ and not constant.to_s == "HookEngine"
+        end.map(&provider.method(:const_get)).first
+
+        if engine
+          engines.push({engine: engine, name: provider::PROVIDER_NAME})
+        end  
+      end
+
+      DiscourseChat::Provider::HookEngine.routes.draw do
+        engines.each do |engine|
+          mount engine[:engine], at: engine[:name]
+        end
+      end
+    end
+
   end
 end
 

lib/discourse_chat/provider/slack/slack_command_controller.rb

@@ -0,0 +1,23 @@
+module DiscourseChat::Provider::SlackProvider
+  class SlackCommandController < DiscourseChat::Provider::HookController
+    requires_provider ::DiscourseChat::Provider::SlackProvider::PROVIDER_NAME
+
+    def say_hello
+
+    	render json: {hello: "world"}
+    end
+  end
+
+  class SlackEngine < ::Rails::Engine
+    engine_name DiscourseChat::PLUGIN_NAME+"-slack"
+    isolate_namespace DiscourseChat::Provider::SlackProvider
+  end
+
+  SlackEngine.routes.draw do
+  	get "command" => "slack_command#say_hello"
+  end
+
+end
+
+
+

lib/discourse_chat/provider/slack/slack_provider.rb

@@ -1,5 +1,3 @@
-require_relative "slack_message_formatter.rb"
-
 module DiscourseChat::Provider::SlackProvider
   PROVIDER_NAME = "slack".freeze
 
@@ -134,3 +132,6 @@ module DiscourseChat::Provider::SlackProvider
 
   end
 end
+
+require_relative "slack_message_formatter.rb"
+require_relative "slack_command_controller.rb"

lib/discourse_chat/provider/telegram/telegram_command_controller.rb

@@ -0,0 +1,19 @@
+module DiscourseChat::Provider::TelegramProvider
+  class TelegramCommandController < DiscourseChat::Provider::HookController
+    requires_provider ::DiscourseChat::Provider::TelegramProvider::PROVIDER_NAME
+
+    def say_hello
+
+    	render json: {hello: "from telegram"}
+    end
+  end
+
+  class TelegramEngine < ::Rails::Engine
+    engine_name DiscourseChat::PLUGIN_NAME+"-telegram"
+    isolate_namespace DiscourseChat::Provider::TelegramProvider
+  end
+
+  TelegramEngine.routes.draw do
+  	get "command" => "telegram_command#say_hello"
+  end
+end

lib/discourse_chat/provider/telegram/telegram_provider.rb

@@ -8,3 +8,5 @@ module DiscourseChat
     end
   end
 end
+
+require_relative "telegram_command_controller.rb"

plugin.rb

@@ -15,8 +15,8 @@ after_initialize do
   module ::DiscourseChat
     PLUGIN_NAME = "discourse-chat-integration".freeze
 
-    class Engine < ::Rails::Engine
-      engine_name DiscourseChat::PLUGIN_NAME
+    class AdminEngine < ::Rails::Engine
+      engine_name DiscourseChat::PLUGIN_NAME+"-admin"
       isolate_namespace DiscourseChat
     end
 
@@ -178,7 +178,7 @@ after_initialize do
 
   add_admin_route 'chat_integration.menu_title', 'chat'
 
-  DiscourseChat::Engine.routes.draw do
+  DiscourseChat::AdminEngine.routes.draw do
     get "" => "chat#respond"
     get '/providers' => "chat#list_providers"
     post '/test' => "chat#test_provider"
@@ -192,7 +192,10 @@ after_initialize do
   end
 
   Discourse::Application.routes.append do
-    mount ::DiscourseChat::Engine, at: '/admin/plugins/chat', constraints: AdminConstraint.new
+    mount ::DiscourseChat::AdminEngine, at: '/admin/plugins/chat', constraints: AdminConstraint.new
+    mount ::DiscourseChat::Provider::HookEngine, at: '/chat-integration/'
   end
 
+  DiscourseChat::Provider.mount_engines
+
 end