NotaBot/bot_utility.lua at master · DigitalPulseSoftware/NotaBot · GitHub

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-- This file is part of the "Not a Bot" application

-- For conditions of distribution and use, see copyright notice in LICENSE

local discordia = require('discordia')

local enums = discordia.enums

local fs = require("coro-fs")

local json = require("json")

local path = require("path")

local discordDomains = {

-- no subdomain

["discord.com"] = true,

["discordapp.com"] = true,

-- public test build

["ptb.discord.com"] = true,

["ptb.discordapp.com"] = true,

-- canary

["canary.discord.com"] = true,

["canary.discordapp.com"] = true,

}

function Bot:DecodeChannel(guild, message)

assert(guild)

assert(message)

local channelId = message:match("<#(%d+)>")

if (not channelId) then

channelId = message:match("^(%d+)$")

if (not channelId) then

return nil, "Invalid channelId id"

end

local channel = guild:getChannel(channelId)

if (not channel) then

return nil, "This channel is not part of this guild"

end

return channel

end

function Bot:DecodeEmoji(guild, message)

assert(guild)

assert(message)

local emojiId = message:match("<a?:[%w_]+:(%d+)>")

if (emojiId) then

-- Custom emoji

local emoji = self:GetEmojiData(guild, emojiId)

if (not emoji) then

return nil, "Failed to get emoji, maybe this is a global emoji?"

end

return emoji

else

-- Discord emoji

local emoji = self:GetEmojiData(guild, message)

if (not emoji) then

return nil, "Invalid emoji"

end

return emoji

end

function Bot:DecodeMember(guild, message)

assert(guild)

assert(message)

local userId = message:match("<@!?(%d+)>")

if (not userId) then

userId = message:match("^(%d+)$")

if (not userId) then

return nil, "Invalid user id"

end

local member = guild:getMember(userId)

if (not member) then

return nil, "This user is not part of this guild"

end

return member

end

function Bot:DecodeMessage(messageContent, ignoreEscaped, fullContent)

assert(messageContent)

local pattern = "(<?)https?://([%w%.]+)/channels/(%d+)/(%d+)/(%d+)(>?)"

if (fullContent) then

pattern = "^" .. pattern .. "$"

end

local e1, domain, guildId, channelId, messageId, e2 = messageContent:match(pattern)

if (not e1 or not discordDomains[domain]) then

return nil, "Invalid link"

end

if (ignoreEscaped and e1 == "<" and e2 == ">") then

return nil, "Escaped link"

end

local guild = self.Client:getGuild(guildId)

if (not guild) then

return nil, "Unavailable guild"

end

local channel = guild:getChannel(channelId)

if (not channel) then

return nil, "Unavailable channel"

end

local message = channel:getMessage(messageId)

if (not message) then

return nil, "Message not found"

end

return message

end

function Bot:DecodeRole(guild, message)

assert(guild)

assert(message)

local roleId = message:match("<@&(%d+)>")

if (not roleId) then

roleId = message:match("^(%d+)$")

if (not roleId) then

return nil, "Invalid role"

end

local role = guild:getRole(roleId)

if (not role) then

return nil, "This role is not part of this guild"

end

return role

end

function Bot:DecodeUser(message)

assert(message)

local userId = message:match("<@!?(%d+)>")

if (not userId) then

userId = message:match("^(%d+)$")

if (not userId) then

return nil, "Invalid user id"

end

local user = self.Client:getUser(userId)

if (not user) then

return nil, "Invalid user (maybe this account was deleted?)"

end

return user

end

function Bot:GenerateMessageLink(message)

local guildId = message.guild and message.guild.id or "@me"

return string.format("https://discord.com/channels/%s/%s/%s", guildId, message.channel.id, message.id)

end

local publicChannels = {

[enums.channelType.text] = true,

[enums.channelType.voice] = true,

[enums.channelType.news] = true,

[enums.channelType.publicThread] = true,

[enums.channelType.newsThread] = true,

}

function Bot:IsPublicChannel(channel)

return publicChannels[channel.type]

end

local ehandler = function(err)

return debug.traceback(tostring(err))

end

function Bot:ProtectedCall(context, func, ...)

local success, a, b, c, d, e, f = xpcall(func, ehandler, ...)

if (not success) then

local err = string.format("%s failed: %s", context, a)

self.Client:warning(err)

return false, err

end

return success, a, b, c, d, e, f

end

-- Serialization/unserialization

function Bot:SerializeToFile(filepath, data, pretty)

local dirname = path.dirname(filepath)

if (dirname ~= ".") then

local success, err = fs.mkdirp(dirname)

if (not success) then

return false, string.format("Failed to create directory %s: %s", filepath, err)

end

local outputFile, err = io.open(filepath, "w+")

if (not outputFile) then

return false, string.format("Failed to open %s: %s", filepath, err)

end

local encoderState = {}

if (pretty) then

encoderState.indent = true

end

local success, serializedDataOrErr = pcall(json.encode, data, encoderState)

if (not success) then

return false, string.format("Failed to serialize data: %s", serializedDataOrErr)

end

local success, err = outputFile:write(serializedDataOrErr)

if (not success) then

return false, string.format("Failed to write data to file %s: %s", filepath, err)

end

outputFile:close()

return true

end

function Bot:UnserializeFromFile(filepath)

local saveFile, err = io.open(filepath, "r")

if (not saveFile) then

return nil, string.format("Failed to open %s: %s", filepath, err)

end

local content, err = saveFile:read("*a")

if (not content) then

return nil, string.format("Failed to read %s content: %s", filepath, err)

end

saveFile:close()

local success, contentOrErr = pcall(json.decode, content)

if (not success) then

return nil, string.format("Failed to unserialize %s content: %s", filepath, contentOrErr)

end

return contentOrErr

end

local fileTypes = {

aac = "sound",

avi = "video",

apng = "image",

bmp = "image",

flac = "video",

gif = "image",

ico = "image",

jpg = "image",

jpeg = "image",

ogg = "sound",

m4a = "sound",

mkv = "video",

mov = "video",

mp1 = "sound",

mp2 = "sound",

mp3 = "sound",

mp4 = "video",

png = "image",

tif = "image",

wav = "sound",

webm = "video",

webp = "image",

wma = "sound",

wmv = "video"

}

function Bot:BuildQuoteEmbed(message, opt)

local author = message.author

local content = message.content

local maxContentSize = 1800 - (opt and opt.initialContentSize or 0)

local decorateEmbed = function(embed)

-- Replace footer and timestamp

embed.author = {

name = author.tag,

icon_url = author.avatarURL

}

embed.thumbnail = opt and opt.bigAvatar and { url = author.avatarURL } or nil

embed.timestamp = message.timestamp

return embed

end

-- Quoting an embed? Copy it

if (#content == 0 and (not message.attachments or #message.attachments == 0) and message.embed) then

return decorateEmbed(message.embed)

end

local fields

local imageUrl

local function ProcessAttachments(attachments)

local images = {}

local files = {}

local sounds = {}

local videos = {}

for _, attachment in pairs(attachments) do

local matchedExt = attachment.url:match("//.-/.+%.(.-)[?].*$") or attachment.url:match("//.-/.+%.(.*)$") or ""

-- Edge case for embed images with no extensions

local ext = (#matchedExt == 0 and attachment.thumbnail and "png" or matchedExt):lower()

-- handle urls ending in .jpg:large

ext = ext:match("^(.+):.-$") or ext

local fileType = fileTypes[ext]

local t = files

if (fileType) then

if (fileType == "image") then

t = images

elseif (fileType == "sound") then

t = sounds

elseif (fileType == "video") then

t = videos

end

table.insert(t, image)

end

-- Special shortcut for one image attachment

if (#attachments == 1 and #images == 1) then

imageUrl = images[1].url

else

-- Should only happens for attachments, not embeds

fields = {}

local function LinkList(title, attachments)

if (#attachments == 0) then

return

end

local desc = {}

for _, attachment in pairs(attachments) do

if attachment.filename then

table.insert(desc, "[" .. (attachment.filename) .. "](" .. attachment.url .. ")")

else

table.insert(desc, attachment.url)

end

table.insert(fields, {

name = title,

value = table.concat(desc, "\n"),

inline = true

})

end

LinkList("Images 🖼️", images)

LinkList("Sounds 🎵", sounds)

LinkList("Videos 🎥", videos)

LinkList("Files 🖥️", files)

if (#images > 0) then

imageUrl = images[1].url

end

if (message.attachments) then

ProcessAttachments(message.attachments)

end

if (message.embeds and not message.attachments) then

ProcessAttachments(message.embeds)

end

if (fields) then

maxContentSize = maxContentSize - #json.encode(fields)

end

-- Fix emojis

content = content:gsub("(<a?:([%w_]+):(%d+)>)", function(mention, emojiName, emojiId)

-- Bot are allowed to use emojis from every servers they are on

local emojiData = Bot:GetEmojiData(nil, emojiId)

local canUse = false

if (emojiData) then

if (emojiData.Custom) then

local emoji = emojiData.Emoji

local guild = emojiData.FromGuild

-- Check if bot has permissions to use this emoji (on the guild it comes from)

local botMember = guild:getMember(Client.user) -- Should never make a HTTP request

local found = true

for _, role in pairs(emoji.roles) do

found = false -- Set false if we enter the loop

if (botMember:hasRole(role)) then

found = true

break

end

canUse = found

else

canUse = true

end

else

canUse = false

end

if (canUse) then

return mention

else

return ":" .. emojiName .. ":"

end

end)

if (#content > maxContentSize) then

content = content:sub(1, maxContentSize) .. "... <truncated>"

end

-- TODO: support multiple stickers (up to 3 per message), even if there's already an attached image?

-- A sticker can be a (1) PNG, (2) APNG or (3) LOTTIE (JSON), if it's a LOTTIE, don't attach it

-- https://discord.com/developers/docs/resources/sticker#sticker-object-sticker-format-types

if (not imageUrl and message._stickers and message._stickers[1].format_type ~= 3) then

imageUrl = "https://media.discordapp.net/stickers/" .. message._stickers[1].id .. ".png?size=128"

end

return decorateEmbed({

image = imageUrl and { url = imageUrl } or nil,

description = content,

fields = fields

})

end

function Bot:FetchChannelMessages(channel, nextId, limit, fromEnd)

limit = limit or 1000

fromEnd = fromEnd or false

local seenMessages = {}

local channelMessages = {}

while limit > 0 do

local requestLimit = math.min(limit, 100)

local messages, err

if fromEnd then

messages, err = channel:getMessagesBefore(nextId, requestLimit)

else

messages, err = channel:getMessagesAfter(nextId or channel.id, requestLimit)

end

if not messages then

return nil, err

end

if fromEnd then

for message in messages:iter() do

local messageId = message.id

if not seenMessages[messageId] then

seenMessages[messageId] = true

table.insert(channelMessages, message)

if not nextId or messageId < nextId then

nextId = messageId

end

else

for message in messages:iter() do

local messageId = message.id

if not seenMessages[messageId] then

seenMessages[messageId] = true

table.insert(channelMessages, message)

if not nextId or messageId > nextId then

nextId = messageId

end

if #messages < requestLimit then

break

end

limit = limit - #messages

end

table.sort(channelMessages, function(a, b)

return a.id < b.id

end)

return channelMessages

end

function Bot:MessagesToTable(messages)

local authors = {}

local messageData = {}

for _, message in ipairs(messages) do

local author = message.member or message.author

if not authors[author.id] then

authors[author.id] = {

-- User fields

accentColor = author.accentColor and discordia.Color(author.accentColor):toHex() or nil,

avatar = author.avatar,

avatarURL = author.avatarURL,

banner = author.banner,

bot = author.bot,

createdAt = author.timestamp,

discriminator = author.discriminator,

flags = author.publicFlags,

premiumType = author.premiumType,

system = author.system,

username = author.username,

-- Member fields

color = (author.getColor and author:getColor() or discordia.Color()):toHex(),

joinedAt = author.joinedAt,

nickname = author.nickname,

premiumSince = author.premiumSince

}

end

local fields = {

attachments = message.attachments,

author = message.author and message.author.id or nil,

content = #message.content > 0 and message.content or nil,

createdAt = message.timestamp,

embed = message.embed,

components = message.components,

interaction = message.interaction,

components = message.components,

tts = message.tts or nil

}

local embed = message.embed

if (embed) then

embed.type = nil

local author = embed.author

if (author) then

author.proxy_icon_url = nil

end

table.insert(messageData, fields)

end

return {

authors = authors,

messages = messageData

}

end

NotaBot/bot_utility.lua at master · DigitalPulseSoftware/NotaBot · GitHub

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