From caca0b13981623b72f2803282a63b1186a6b02c6 Mon Sep 17 00:00:00 2001
From: Danila Fedorin <danila.fedorin@gmail.com>
Date: Fri, 12 Jan 2018 22:07:20 -0800
Subject: [PATCH] Add a way to send messages.

---
 src/telepathy/bot.cr | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/src/telepathy/bot.cr b/src/telepathy/bot.cr
index 12239a7..1a955c8 100644
--- a/src/telepathy/bot.cr
+++ b/src/telepathy/bot.cr
@@ -6,6 +6,10 @@ module Telepathy
             Done
         end
 
+        enum ParseMode
+            Normal, Markdown, HTML
+        end
+
         def initialize(@api_token : String)
             @request_base = "https://api.telegram.org/bot#{@api_token}"
             @this_user = uninitialized User?
@@ -35,6 +39,25 @@ module Telepathy
             return Response(Array(Update)).from_json(response.body).result
         end
 
+        def send_message(chat_id : String | Int64, text : String,
+                         parse_mode : ParseMode = ParseMode::Normal,
+                         disable_web_preview : Bool = false,
+                         disable_notification : Bool = false,
+                         reply_to_message_id : Int64? = nil)
+            message_data = { "chat_id" => chat_id, "text" => text } of String => Int64 | String | Bool
+            message_data["disable_web_preview"] = true if disable_web_preview
+            message_data["disable_notification"] = true if disable_notification
+            if parse_mode == ParseMode::Markdown
+                message_data["parse_mode"] = "Markdown"
+            elsif parse_mode == ParseMode::HTML
+                message_data["parse_mode"] = "HTML"
+            end
+            reply_to_message_id.try { |id| message_data["reply_to_message_id"] = id }
+            HTTP::Client.get(@request_base + "/sendMessage",
+                             headers: HTTP::Headers{"User-agent" => "Telepathy", "Content-type" => "application/json" },
+                             body: message_data.to_json)
+        end
+
         def command(command_name, &block: Update, Array(String) -> Void)
             @command_hooks[command_name] = block
         end