Translator plugin. Closes #76

plugins/translate.lua

@@ -0,0 +1,81 @@
+
+--[[
+-- Translate text using Google Translate.
+-- http://translate.google.com/translate_a/t?client=z&ie=UTF-8&oe=UTF-8&hl=en&tl=en&text=hello
+--]]
+do
+
+function translate(source_lang, target_lang, text)
+  local path = "http://translate.google.com/translate_a/t"
+  -- URL query parameters
+  local params = {
+    client = "z", -- JSON
+    ie = "UTF-8",
+    oe = "UTF-8",
+    hl = "en",
+    tl = target_lang or "en",
+    sl = source_lang or "",
+    text = URL.escape(text)
+  }
+
+  local query = format_http_params(params, true)
+  local url = path..query
+
+  local res, code = https.request(url)
+  -- Return nil if error
+  if code > 200 then return nil end
+  
+  local trans = json:decode(res)
+  
+  local sentences = ""
+  -- Join multiple sencentes
+  for k,sentence in pairs(trans.sentences) do
+    sentences = sentences..sentence.trans..'\n'
+  end
+
+  return sentences
+end
+
+function run(msg, matches)
+  -- Third pattern
+  if #matches == 1 then
+    print("First")
+    local text = matches[1]
+    return translate(nil, nil, text)
+  end
+
+  -- Second pattern
+  if #matches == 2 then
+    print("Second")
+    local target = matches[1]
+    local text = matches[2]
+    return translate(nil, target, text)
+  end
+
+  -- Frist pattern
+  if #matches == 3 then
+    print("Third")
+    local source = matches[1]
+    local target = matches[2]
+    local text = matches[3]
+    return translate(source, target, text)
+  end
+
+end
+
+return {
+  description = "Translate some text", 
+  usage = {
+    "!translate text. Translate to english the text.",
+    "!translate target_lang text.",
+    "!translate source,target text",
+  },
+  patterns = {
+    "^!translate ([%w]+),([%a]+) (.+)",
+    "^!translate ([%w]+) (.+)",
+    "^!translate (.+)",
+  }, 
+  run = run 
+}
+
+end