Abyo

Notification bot (LondonPogoMap to public Discord channels) with abstract filters.

App files

• index.js – Contains functions to load Agents and run the process loop.
• fetch.js – Wraps LondonPogoMap HTTP endpoint and error-handling.
• parse.js – Provides Pokemon class, which parses a raw Pokemon (from the fetched data) into a workable object.
• agent.js – Provides Agent class (see below), representing an abstract filter, responsible for filtering, as well as annotating and sending.
• post.js – Wraps Discord HTTP endpoint and error-handling, and sends messages with up-to-date time information.

Utilities

• locate.js – Module that converts co-ordinates into accurate location data using local data and geo.js.
• geo.js – Module that provides geographical algorithms, namely distance, point-in-polygon (with bounding-box optimisation), point location in polygon partition, and closest point.
• date.js – Script that adds useful formatting and conversion methods to the built-in Date object.
• error.js – Module that logs error information to ./error.txt.

Improvements over previous versions of public Pyobot

• Location data computed locally from accurate, processed data rather than via HTTP from inaccurate, unprocessed third-party endpoint – faster, more scalable and gives better info.
• Abstract filters over concrete JSON filter parameters – much more flexibility to configure notification channels (e.g. as of v1.1: can filter location by polygon).
• Logic to try to poll for data as soon as it's available (continually adjusting its timing) rather than in fixed intervals – noticeably faster.
• Redesigned notification format: takes advantage of line breaks on iOS while giving detailed yet clearly delimited single-line alerts on Android.

Agents and abstract filters?

The idea is that each Agent object is instantiated from a script file, which provides a dictionary of channels that the Agent should send to (with format {identifier: DiscordChannelID}) and a filter function with argument Pokemon that returns a channel identifier from the dictionary (or array of them) for an accepted Pokemon and undefined (or []) for a rejected Pokemon. Each Agent represents a natural filtering demand, like (see examples in ./agents/):

• picking a channel for each Unown letter, and reposting 100% IV to a special channel;
• picking a channel for each rare Dex entry;
• posting to a single curated channel;
• posting to various channels for a single local area.

To set up

• authenticate your IP address with the Discord gateway.
• Create a .env file, containing configuration variables that are loaded when the app is started:
  • KEY_BOT is the Discord bot token;
  • KEY_GOOGLE is the Google Static Maps API key;
  • LOCATE = true/false toggles loading and using locate.js;
  • POST = true/false toggles real/test posting mode (Discord/console rsp.);
  • AUTORUN = true/false toggles starting the bot upon load (loads agents, then starts loop).
• Place in ./agents/ a .js file for every agent (template.js is ignored).

To run (REPL mode)

• open command line in the program directory and run Node.js REPL via the command node (no arguments).
• run .load index.js to load program (load(); go() is run if AUTORUN = true in .env).
• load() (re)loads the Agents. If an Agent is sending when reloaded, it will continue to exist until it finishes.
• run() runs one instance of the process loop.
• go() starts the process loop (if already started, it will continue the loop immediately).
• stop() stops the process loop.
• Testing: .load can be used to test each code file individually and .load test.js imports test data).

To run (non-REPL mode)

Use if problems in REPL mode with command line falling asleep or such.

• with AUTORUN = true set in .env, open command line in the program directory and run node ..

Tada!

Acknowledgements

With thanks to moriakaice from the PokémonGoLondon Discord for implementing the original Node.js version of the notification bot ("Pyobot"), from which I learned some code techniques and tools, and got inspiration for improvements, and to the Discord community for providing ongoing feedback. – Pyorot