out-of-your-element/discord/utils.js

50 lines
1.6 KiB
JavaScript

// @ts-check
const DiscordTypes = require("discord-api-types/v10")
/**
* @param {string[]} userRoles
* @param {DiscordTypes.APIGuild["roles"]} guildRoles
* @param {string} [userID]
* @param {DiscordTypes.APIGuildChannel["permission_overwrites"]} [channelOverwrites]
*/
function getPermissions(userRoles, guildRoles, userID, channelOverwrites) {
let allowed = BigInt(0)
let everyoneID
// Guild allows
for (const role of guildRoles) {
if (role.name === "@everyone") {
allowed |= BigInt(role.permissions)
everyoneID = role.id
}
if (userRoles.includes(role.id)) {
allowed |= BigInt(role.permissions)
}
}
if (channelOverwrites) {
/** @type {((overwrite: Required<DiscordTypes.APIGuildChannel>["permission_overwrites"][0]) => any)[]} */
const actions = [
// Channel @everyone deny
overwrite => overwrite.id === everyoneID && (allowed &= ~BigInt(overwrite.deny)),
// Channel @everyone allow
overwrite => overwrite.id === everyoneID && (allowed |= BigInt(overwrite.allow)),
// Role deny
overwrite => userRoles.includes(overwrite.id) && (allowed &= ~BigInt(overwrite.deny)),
// Role allow
overwrite => userRoles.includes(overwrite.id) && (allowed |= ~BigInt(overwrite.allow)),
// User deny
overwrite => overwrite.id === userID && (allowed &= ~BigInt(overwrite.deny)),
// User allow
overwrite => overwrite.id === userID && (allowed |= BigInt(overwrite.allow))
]
for (let i = 0; i < actions.length; i++) {
for (const overwrite of channelOverwrites) {
actions[i](overwrite)
}
}
}
return allowed
}
module.exports.getPermissions = getPermissions