* Modern: Supports new Discord features like replies, threads and stickers, and new Matrix features like edits, spaces and space membership.
* Reliable: Any errors on either side are notified on Matrix and can be retried.
* Tested: A test suite and code coverage make sure all the core logic works.
* Simple development: No build step (it's JavaScript, not TypeScript), minimal/lightweight dependencies, and abstraction only where necessary so that less background knowledge is required. No need to learn about Intents or library functions.
* Some aspects of this bridge are customised for my homeserver. I'm working over time to make it more general. Please please reach out to @cadence:cadence.moe if you would like to run this, and I'll work with you to get it running!
# Development information
## You will need
* Discord bot
* Access to the homeserver's configuration
* (For now) Help and support from @cadence:cadence.moe. Message me and tell me you're interested in OOYE!
* The L1 and L2 emojis
## Initial setup
Node.js version 18 or later is required: https://nodejs.org/en/download/releases (the matrix-appservice dependency demands 18)
Install dependencies: `npm install --save-dev`
Copy `config.example.js` to `config.js` and fill in Discord token.
Copy `registration.example.yaml` to `registration.yaml` and fill in bracketed values. Register it in Synapse's `homeserver.yaml` through the usual appservice installation process, then restart Synapse.
If developing on a different computer to the one running the homeserver, use SSH port forwarding so that Synapse can connect on its `localhost:6693` to reach the running bridge on your computer. Example: `ssh -T -v -R 6693:localhost:6693 username@matrix.cadence.moe`
Make sure the tests work: `npm t`
I recommend developing in Visual Studio Code so that the JSDoc x TypeScript annotations work. I don't know what other editors or language servers support annotations and type inference.
## Repository structure
.
* Entrypoint:
├── index.js
* Runtime configuration, like tokens and user info:
├── config.js
├── registration.yaml
* The bridge's SQLite database is stored here:
├── db
│ └── *.sql, *.db
* Discord-to-Matrix bridging:
├── d2m
│ * Execute actions through the whole flow, like sending a Discord message to Matrix:
│ ├── actions
│ │ └── *.js
│ * Convert data from one form to another without depending on bridge state. Called by actions:
│ ├── converters
│ │ └── *.js
│ * Making Discord work:
│ ├── discord-*.js
│ * Listening to events from Discord and dispatching them to the correct `action`:
│ └── event-dispatcher.js
* Matrix-to-Discord bridging:
├── m2d
│ * Execute actions through the whole flow, like sending a Matrix message to Discord:
│ ├── actions
│ │ ├── *.js
│ ├── converters
│ │ └── *.js
│ └── event-dispatcher.js
* We aren't using the matrix-js-sdk, so here's all the stuff we need to call the Matrix CS API:
├── matrix
│ └── *.js
* Various files you can run once if you need them. Hopefully you won't need them.
├── scripts
│ └── *.js
* First time running a new bridge? Run this file to plant a seed, which will flourish into state for the bridge:
* (50) better-sqlite3: SQLite3 is the best database, and this is the best library for it. Really! I love it.
* (1) chunk-text: It does what I want.
* (0) cloudstorm: Discord gateway library with bring-your-own-caching that I trust.
* (8) snowtransfer: Discord API library with bring-your-own-caching that I trust.
* (1) discord-markdown: This is my fork! I make sure it does what I want.
* (1) heatsync: Module hot-reloader that I trust.
* (1) js-yaml: It seems to do what I want, and it's already pulled in by matrix-appservice.
* (115) matrix-appservice: I wish it didn't pull in express :(
* (0) mixin-deep: This is my fork! It fixes a bug in regular mixin-deep.
* (3) node-fetch@2: I like it and it does what I want.
* (0) prettier-bytes: It does what I want and has no dependencies.
* (0) try-to-catch: Not strictly necessary, but it does what I want and has no dependencies.
* (1) turndown: I need an HTML-to-Markdown converter and this one looked suitable enough. It has some bugs that I've worked around, so I might switch away from it later.