Merge pull request #1 from javierhonduco/master

👍

README.md

@@ -1,15 +1,22 @@
 telegram-bot
 ============
 
-Bot for telegram with [tg](https://github.com/vysheng/tg).
+A telegram bot using https://github.com/vysheng/tg.
+
+Installation
+------------
+
+* Requirements
 ```bash
-# Tested on Ubuntu 14.04
-sudo apt-get install lua-socket libreadline-dev libconfig-dev libssl-dev lua5.2 liblua5.2-dev libevent-dev fortune curl
-git clone https://github.com/yagop/telegram-bot.git && cd telegram-bot
-git submodule update --init --recursive
-cd tg
-./configure && make
-../launch.sh
+# Tested on Ubuntu 14.04, for other OSs check out https://github.com/vysheng/tg#installation
+$ sudo apt-get install libreadline-dev libconfig-dev libssl-dev lua5.2 liblua5.2-dev libevent-dev fortune curl luarocks
+```
+
+* Clone the repo & compile the telegram library
+```bash
+$ git clone https://github.com/yagop/telegram-bot --recursive && cd telegram-bot/tg
+$ ./configure && make
+$ cd .. && ./launch.sh # Will ask you for a telegram enabled number phone & confirmation code.
 ```
 
 Command list

bot/bot.lua

@@ -16,9 +16,11 @@ function on_msg_receive (msg)
   else
     if is_image_url(msg.text) then
       send_image_from_url (msg)
+    elseif is_youtube_url(msg.text) then
+      send_youtube_thumbnail(msg.text)
     else
       if is_file_url(msg.text) then
-        send_file_from_url (msg)
+        send_file_from_url(msg)
       end
     end
   end
@@ -67,6 +69,20 @@ function is_image_url(text)
   return false
 end
 
+function is_youtube_url(text)
+  -- http://stackoverflow.com/questions/19377262/regex-for-youtube-url
+  not_full_yt_url = string.match(text, "youtube.com/watch%?v=([A-Za-z0-9-]*)") == nil
+  not_short_yt_url = string.match(text, "youtu.be/([A-Za-z0-9-]*)") == nil
+  yt = full_yt_url or short_yt_url
+  return yt
+end
+
+function send_youtube_thumbnail(msg)
+  yt_thumbnail = "http://img.youtube.com/vi/".. string.match(msg.text, "([A-Za-z0-9-]*)").."/hqdefault.jpg"
+  file = download_to_file(yt_thumbnail)
+  send_photo(get_receiver(msg), file, ok_cb, false)
+end
+
 function is_file_url(text)
   last = string.get_last_word(text)
   extension = string.get_extension_from_filename(last)
@@ -107,13 +123,13 @@ function do_action(msg)
     send_msg(receiver, meaning, ok_cb, false)
   end
   
-   if string.starts(msg.text, '!9gag') then
-      url, title = get_9GAG()
-      file_path = download_to_file(url)
-      send_photo(receiver, file_path, ok_cb, false)
-      send_msg(receiver, title, ok_cb, false)
-      return
-   end 
+  if string.starts(msg.text, '!9gag') then
+    url, title = get_9GAG()
+    file_path = download_to_file(url)
+    send_photo(receiver, file_path, ok_cb, false)
+    send_msg(receiver, title, ok_cb, false)
+    return
+  end 
 
    if string.starts(msg.text, '!fortune') then
       text = run_bash('fortune')