out-of-your-element/m2d/actions/channel-webhook.js

99 lines
3.5 KiB
JavaScript

// @ts-check
const assert = require("assert").strict
const DiscordTypes = require("discord-api-types/v10")
const {Readable} = require("stream")
const passthrough = require("../../passthrough")
const {discord, db, select} = passthrough
/**
* Look in the database to find webhook credentials for a channel.
* (Note that the credentials may be invalid and need to be re-created if the webhook was interfered with from outside.)
* @param {string} channelID
* @param {boolean} forceCreate create a new webhook no matter what the database says about the state
* @returns id and token for a webhook for that channel
*/
async function ensureWebhook(channelID, forceCreate = false) {
if (!forceCreate) {
const row = select("webhook", ["webhook_id", "webhook_token"], {channel_id: channelID}).get()
if (row) {
return {
id: row.webhook_id,
token: row.webhook_token,
created: false
}
}
}
// If we got here, we need to create a new webhook.
const webhook = await discord.snow.webhook.createWebhook(channelID, {name: "Out Of Your Element: Matrix Bridge"})
assert(webhook.token)
db.prepare("REPLACE INTO webhook (channel_id, webhook_id, webhook_token) VALUES (?, ?, ?)").run(channelID, webhook.id, webhook.token)
return {
id: webhook.id,
token: webhook.token,
created: true
}
}
/**
* @param {string} channelID
* @param {(webhook: import("../../types").WebhookCreds) => Promise<T>} callback
* @returns Promise<T>
* @template T
*/
async function withWebhook(channelID, callback) {
const webhook = await ensureWebhook(channelID, false)
return callback(webhook).catch(async e => {
if (e.message === `{"message": "Unknown Webhook", "code": 10015}`) { // pathetic error handling from SnowTransfer
// Our webhook is gone. Maybe somebody deleted it, or removed and re-added OOYE from the guild.
const newWebhook = await ensureWebhook(channelID, true)
return callback(newWebhook) // not caught; if the error happens again just throw it instead of looping
}
throw e
})
}
/**
* @param {string} channelID
* @param {DiscordTypes.RESTPostAPIWebhookWithTokenJSONBody & {files?: {name: string, file: Buffer | Readable}[]}} data
* @param {string} [threadID]
*/
async function sendMessageWithWebhook(channelID, data, threadID) {
const result = await withWebhook(channelID, async webhook => {
return discord.snow.webhook.executeWebhook(webhook.id, webhook.token, data, {wait: true, thread_id: threadID})
})
return result
}
/**
* @param {string} channelID
* @param {string} messageID
* @param {DiscordTypes.RESTPatchAPIWebhookWithTokenMessageJSONBody & {files?: {name: string, file: Buffer | Readable}[]}} data
* @param {string} [threadID]
*/
async function editMessageWithWebhook(channelID, messageID, data, threadID) {
const result = await withWebhook(channelID, async webhook => {
return discord.snow.webhook.editWebhookMessage(webhook.id, webhook.token, messageID, {...data, thread_id: threadID})
})
return result
}
/**
* @param {string} channelID
* @param {string} messageID
* @param {string} [threadID]
*/
async function deleteMessageWithWebhook(channelID, messageID, threadID) {
const result = await withWebhook(channelID, async webhook => {
return discord.snow.webhook.deleteWebhookMessage(webhook.id, webhook.token, messageID, threadID)
})
return result
}
module.exports.ensureWebhook = ensureWebhook
module.exports.withWebhook = withWebhook
module.exports.sendMessageWithWebhook = sendMessageWithWebhook
module.exports.editMessageWithWebhook = editMessageWithWebhook
module.exports.deleteMessageWithWebhook = deleteMessageWithWebhook