Function notifyChannel

apps/web/services/channels/userJoined.ts:31–63

(
  channel: { id: string; channelName: string },
  linenBot: users,
  displayName: string
)

}

async function notifyChannel(
  channel: { id: string; channelName: string },
  linenBot: users,
  displayName: string
) {
  const lastThread = await prisma.threads.findFirst({
    select: { messages: true, id: true },
    where: { channelId: channel.id },
    orderBy: { sentAt: 'desc' },
  });
  // if last message from channel is from linen-bot, lets append the welcome for the new user
  if (
    lastThread &&
    lastThread.messages.length &&
    lastThread.messages[0].usersId === linenBot.id &&
    lastThread.messages[0].body.startsWith('Welcome')
  ) {
    let body = processMessage(lastThread.messages[0].body, displayName);
    await prisma.messages.update({
      data: {
        body,
      },
      where: { id: lastThread.messages[0].id },
    });
  } else {
    // new thread will be created
    await createThread({
      body: `Welcome! \`${displayName}\` joined #${channel.channelName}.`,
      channelId: channel.id,
      linenBotId: linenBot.id,
    });
  }
}

export function processMessage(body: string, displayName: string) {
  let split = body.split('`');