Adding twitter plugin

bot/config.json

@@ -2,5 +2,11 @@
       "log_file": "/var/www/html/log.txt",
     "sh_enabled": false,
     "sudo_users": [ 0, 1 ],
-        "values": { }
-}
+        "values": { },
+       "twitter": {
+                     "consumer_key" : "",
+                     "consumer_secret" : "",
+                     "access_token" : "",
+                     "access_token_secret" : ""
+                  }
+}

plugins/twitter.lua

@@ -0,0 +1,70 @@
+local OAuth = require "OAuth"
+
+local consumer_key = config.twitter.consumer_key
+local consumer_secret = config.twitter.consumer_secret
+local access_token = config.twitter.access_token
+local access_token_secret = config.twitter.access_token_secret
+
+local client = OAuth.new(consumer_key, consumer_secret, {
+    RequestToken = "https://api.twitter.com/oauth/request_token", 
+    AuthorizeUser = {"https://api.twitter.com/oauth/authorize", method = "GET"},
+    AccessToken = "https://api.twitter.com/oauth/access_token"
+}, {
+    OAuthToken = access_token,
+    OAuthTokenSecret = access_token_secret
+})
+
+function run(msg, matches)
+
+  local twitter_url = "https://api.twitter.com/1.1/statuses/show/" .. matches[1] .. ".json"
+
+  print(twitter_url)
+
+  local response_code, response_headers, response_status_line, response_body = client:PerformRequest("GET", twitter_url)
+  print(response_body)
+  local response = json:decode(response_body)
+
+  print("response = ", response)
+
+  local header = "Tweet from " .. response.user.name .. " (@" .. response.user.screen_name .. ")\n"
+  local text = response.text
+  
+  -- replace short URLs
+  if response.entities.url then
+    for k, v in pairs(response.entities.urls) do 
+        local short = v.url
+        local long = v.expanded_url
+        text = text:gsub(short, long)
+    end
+  end
+  
+  -- remove images
+  local images = {}
+  if response.entities.media then
+    for k, v in pairs(response.entities.media) do
+        local url = v.url
+        local pic = v.media_url
+        text = text:gsub(url, "")
+        table.insert(images, pic)
+    end
+  end
+
+  -- send the parts 
+  local receiver = get_receiver(msg)
+  send_msg(receiver, header .. "\n" .. text, ok_cb, false)
+  for k, v in pairs(images) do
+    local file = download_to_file(v)
+    send_photo(receiver, file, ok_cb, false)
+  end
+  
+  return nil
+end
+
+return {
+    description = "Shows a tweet", 
+    usage = "",
+    patterns = {"https://twitter.com/[^/]+/status/([0-9]+)"}, 
+    run = run 
+}
+
+