v0.1.0

lib/telegram/bot.rb

@@ -0,0 +1,98 @@
+require 'httpclient'
+require 'json'
+require 'active_support/core_ext/string/inflections'
+require 'active_support/core_ext/hash/keys'
+require 'active_support/core_ext/array/wrap'
+require 'telegram/bottable'
+
+module Telegram
+  extend Bottable
+
+  class Bot
+    class Error < StandardError; end
+    class NotFound < Error; end
+
+    autoload :Middleware,         'telegram/bot/middleware'
+    autoload :UpdatesController,  'telegram/bot/updates_controller'
+    autoload :UpdatesPoller,      'telegram/bot/updates_poller'
+
+    URL_TEMPLATE = 'https://api.telegram.org/bot%s/'.freeze
+
+    class << self
+      # Accepts different options to initialize bot.
+      def wrap(input)
+        case input
+        when self then input
+        when Array then input.map(&method(__callee__))
+        when Hash then
+          input = input.stringify_keys
+          new input['token'], input['username']
+        else
+          new(input)
+        end
+      end
+    end
+
+    attr_reader :client, :token, :username, :base_uri
+
+    def initialize(token, username = nil)
+      @client = HTTPClient.new
+      @token = token
+      @username = username
+      @base_uri = format URL_TEMPLATE, token
+    end
+
+    def debug!(dev = STDOUT)
+      client.debug_dev = dev
+    end
+
+    def debug_off!
+      client.debug_dev = nil
+    end
+
+    def request(action, data = {})
+      res = http_request("#{base_uri}#{action}", data)
+      status = res.status
+      return JSON.parse(res.body) if 300 > status
+      result = JSON.parse(res.body) rescue nil # rubocop:disable RescueModifier
+      err_msg = "#{res.reason}: #{result && result['description'] || '-'}"
+      # NotFound is raised only for valid responses from Telegram
+      raise NotFound, err_msg if 404 == status && result
+      raise Error, err_msg
+    end
+
+    %w(
+      answerInlineQuery
+      forwardMessage
+      getFile
+      getMe
+      getUpdates
+      getUserProfilePhotos
+      sendAudio
+      sendChatAction
+      sendDocument
+      sendLocation
+      sendMessage
+      sendPhoto
+      sendSticker
+      sendVideo
+      sendVoice
+      setWebhook
+    ).each do |method|
+      define_method(method.underscore) { |*args| request(method, *args) }
+    end
+
+    # Endpoint for low-level request. For easy host highjacking & instrumentation.
+    # Params are not used directly but kept for instrumentation purpose.
+    # You probably don't want to use this method directly.
+    def http_request(uri, body)
+      client.post(uri, body)
+    end
+
+    def inspect
+      "#<Telegram::Bot##{object_id}(#{@username})>"
+    end
+  end
+end
+
+require 'telegram/bot/railtie' if defined?(Rails)