I use the chat client Digsby: http://www.digsby.com/

It saves chat logs in HTML format in the folder 'My Documents/Digsby Logs/--DigsbyUsername--/--ChatService--/--ChatServiceUsername--/--CorrespondentUsername--/date.html

So after a while of using multiple chat services and talking to different people on different dates, it will create a whole folder tree of HTML logs.

I don't know if the log files are updated continuously while chatting, or if it only writes to the log at a certain interval or when the chat window is closed.

I need a program for Win 7 (32 bit) that will monitor 'My Documents/Digsby Logs/' for any changes and if a new chat log is added or an existing log is appended, it will email me the transcript.

Options I would like to have:
* Set the outgoing mail server
* Set the 'From:" email address, or to use the correspondent's email address
* Let me define the email subject using variables from the parsed location/file name info
* The option to send the log as the body of the email or as an attachment
* Set the interval for checking for changes. If log writing is continuous while chatting, also set the idle period before chat is emailed (if file is not updates in last xx minutes, send the log)

For instance, I would want to be able to specify the following subject:
Chat log with %Correspondent on %Date at %Time

The method for achieving this is up to you. It will probably be easier to have a stand-alone program that works independently from Digsby. Digsby does have email sending capabilities, but I don't know how hard it would be to integrate with it.

It could also be built as a Thunderbird plugin (as long as it will work on V 2.0 and up) I would prefer this, as I always have Thunderbird running anyway).

Please specify the programming language you would use, and any additional requirements it would need.

I will need to receive the source code with full usage rights, but you may keep, sell, distribute and take credit for the project as long as I receive lifetime free upgrades on any updates you make. I only need this for my own personal use.

This is a personal project and my budget is small. This program really shouldn't be too complicated if you think about it. Check for file changes and email contents if updates are made.
After testing, I see that the chat logs are updated continuously while having a chat conversation, so there will need to be an idle check before sending the transcript. So it will need to send the transcript of changed files, but only after they haven't been written for xx minutes. This number of minutes should be configurable.