basic url validation/file name validation

mandy.lua

@@ -6,6 +6,7 @@
 require("iuplua")
 require("iupluacontrols")
 require('progress')
+require('ffmpeg_progress')
 
 
 --Main url entry box
@@ -13,9 +14,17 @@ function url_entry()
 
 res, url = iup.GetParam("Mandy - Enter URL", nil, 
     "Enter Youtube URL: %s\n", "")
+    if string.match(url, "youtube.com/watch") then
+      return url
+
+    else
+      iup.Message("Error", "The URL is not a youtube link")
+      iup.Flush()
+      iup.Close()
+
     
+    end
     
-    return url
 
 end
 
@@ -41,8 +50,16 @@ function set_dir()
     local status = getPath.status
 
     if status == "1" then
-        local savedPath = getPath.value
-        return savedPath
+        if string.match(getPath.value, ".mp3") then
+          local savedPath = getPath.value
+          return savedPath
+
+        else
+          local savedPath = getPath.value..".mp3"
+          return savedPath
+
+        end
+
     
     elseif status == "0" then
        
@@ -78,18 +95,12 @@ function ytDl(x)
 end
 
 function ffmpeg(tmpPath, dirD)
-  
-  if dirD == dirD..".mp3" then
-    dirD = dirD
-    mp3 = "ffmpeg -i "..tmpPath.." -acodec libmp3lame -ac 2 -ab 192k -vn -y "..dirD..""
+
+    local mp3 = "ffmpeg -i "..tmpPath.." -acodec libmp3lame -ac 2 -ab 192k -vn -y "..dirD
     os.execute(mp3)
+    -- convert_mp3.go(mp3)
     io.popen("vlc "..dirD)
-  elseif dirD ~= dirD..".mp3" then
-    dirD = dirD..".mp3"
-    mp3 = "ffmpeg -i "..tmpPath.." -acodec libmp3lame -ac 2 -ab 192k -vn -y"..dirD..""
-    os.execute(mp3)
-    io.popen("vlc "..dirD)
-  end
+
 end
 
 --put everything into a table to use local functions globally