- NEU: Voice-To-Text! "Übersetzt" Sprachnachrichten in Text (wit.ai Server API-Key muss eingetragen werden!)

- POST-Requests mit Dateien sind nun möglich

otouto/plugins/voice_to_text.lua

@@ -0,0 +1,61 @@
+local vtt = {}
+
+vtt.triggers = {
+  '/nil'
+}
+
+local apikey = cred_data.witai_apikey
+
+function vtt:pre_process(msg, config)
+  if not msg.voice then return msg end -- Ignore
+  local mime_type = msg.voice.mime_type
+  if mime_type ~= 'audio/ogg' then return msg end -- We only want to transcript voice messages
+  local file_id = msg.voice.file_id
+  local file_size = msg.voice.file_size
+  if file_size > 19922944 then
+	print('File is over 20 MB - can\'t download :(')
+	return msg
+  end
+  
+  utilities.send_typing(msg.chat.id, 'typing')
+  -- Saving file to the Telegram Cloud
+  local request = bindings.request('getFile', {
+		file_id = file_id
+  } )
+
+  local download_url = 'https://api.telegram.org/file/bot'..config.bot_api_key..'/'..request.result.file_path
+  local ogg_file_name = file_id..'.oga'
+  local ogg_file = download_to_file(download_url, ogg_file_name)
+  
+  -- Convert to MP3
+  run_command('ffmpeg -loglevel panic -i /tmp/'..ogg_file_name..' -ac 1 -y /tmp/'..file_id..'.mp3')
+  os.remove('/tmp/'..ogg_file_name)
+
+  local mp3_file = '/tmp/'..file_id..'.mp3'
+
+  -- Voice-To-Text via wit.ai
+  local headers = {
+	["Content-Type"] = "audio/mpeg3",
+	Authorization = "Bearer "..apikey
+  }
+  local data = post_petition('https://api.wit.ai/speech?v=20160526', io.open(mp3_file, 'r'), headers)
+  os.remove(mp3_file)
+
+  if not data then
+	return msg
+  end
+  
+  if not data._text then
+    utilities.send_reply(msg, 'Keine Stimme zu hören!')
+	return
+  end
+
+  utilities.send_reply(msg, data._text)
+    
+  return msg
+end
+
+function vtt:action(msg)
+end
+
+return vtt