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As I mentioned, the SMS to Email interface is largely old news. It is an inelegant way of interacting with the service. There are a lot of steps, but I'm work with email so it was a very easy way to hack together a solution. I have since taken the time to do this better by interacting directly with the services API. For those who aren't aware, this is a Application Programmer's Interface. Basically it means that I can send requests directly to the service provider and handle the responses however I like.
This largely just simplified how I get the data. Most of the user interaction is the same. While the emails still come in, it no longer relies on hitting Procmail. Instead, I can have my API program running anywhere I like, not just on my mail server. This is then able to submit new messages directly and poll for any new inbound messages to alert me to. When new messages still come in, the code that sends that message to IRC behaves basically as it did above and IRC replies are forwarded back through the API as well.
The main advantage to the API data is that it is all standard JSON which is extremely easy to work with. As email I needed to parse the headers. If messages came in quicker than the program could run I would sometimes get alerted to the first second message twice, and all of this made it slightly slow. The messages in JSON cannot be confused with one another, there is no extra junk to slow it down and the data is guaranteed to be exactly what I was looking for.
Because it is so much easier to work with and because the functions that send and receive the messages are abstracted away from the interface, it is much easier to add new ways to interact. For instance, I have a Cronjob that looks through my calendar and sends me a text message for appointments. It also tells me if I need to get to work a few minutes early, and checks the forecast to see if I should bring an umbrella or bike to work. I could set up a task to automatically send other people messages on certain days/times. I have even set up a basic auto-reply robot that can provide myself and others with information. Keep an eye out for a future Projects article on this. For instance, if the sender is on a trusted list, they can find out what I have scheduled by asking the robot. Unknown/untrusted numbers can get pointed to this website. I can use it to get OC Transpo bus information.
Some of this can be cobbled together with Google Calendar and a specific app for each task. Others just can't be done at all. But even with those that can be done, I would be changing from the way I want to interact with the system in order to get the result I want. I don't want Google to know my schedule, nor do I want 30 apps on the phone I rarely look at. If I sit in front of an IRC screen all day anyways, it is nice to get all of my notifications and messages there, where I can react to them with the comfort of my keyboard.