react-code-dataset / spectrum /api /models /directMessageThread.js

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//@flow
const { db } = require('shared/db');

export type DBDirectMessageThread = {
  createdAt: Date,
  id: string,
  name?: string,
  threadLastActive: Date,
};

// prettier-ignore
const checkForExistingDMThread = async (participants: Array<string>): Promise<?string> => {
  // return a list of all threadIds where both participants are active
  let idsToCheck = await db
    .table('usersDirectMessageThreads')
    .getAll(...participants, { index: 'userId' })
    .group('threadId')
    .map(row => row('userId'))
    .ungroup()
    .filter(row =>
      row('reduction')
        .count()
        .eq(participants.length)
    )
    .pluck('group')
    .run();

  if (!idsToCheck || idsToCheck.length === 0) return null;

  // return only the thread Ids
  idsToCheck = idsToCheck.map(row => row.group);

  // given a list of threads where both users are active (includes all groups)
  // return only threads where these exact participants are used
  return await db
    .table('usersDirectMessageThreads')
    .getAll(...idsToCheck, { index: 'threadId' })
    .group('threadId')
    .ungroup()
    .filter(row =>
      row('reduction')
        .count()
        .eq(participants.length)
    )
    .pluck('group')
    .map(row => row('group'))
    .run()
    .then(results => (results && results.length > 0 ? results[0] : null));
};

// prettier-ignore
const getDirectMessageThread = (directMessageThreadId: string): Promise<DBDirectMessageThread> => {
  return db
    .table('directMessageThreads')
    .get(directMessageThreadId)
    .run()
    .then(res => res && !res.deletedAt ? res : null);
};

// prettier-ignore
const getDirectMessageThreads = (ids: Array<string>): Promise<Array<DBDirectMessageThread>> => {
  return db
    .table('directMessageThreads')
    .getAll(...ids)
    .filter(row => row.hasFields('deletedAt').not())
    .run();
};

const getDirectMessageThreadsByUser = (
  userId: string,
  // $FlowFixMe
  { first, after }
): Promise<Array<DBDirectMessageThread>> => {
  return db
    .table('usersDirectMessageThreads')
    .getAll(userId, { index: 'userId' })
    .filter(row => row.hasFields('deletedAt').not())
    .eqJoin('threadId', db.table('directMessageThreads'))
    .without({
      left: ['id', 'createdAt', 'threadId', 'userId', 'lastActive', 'lastSeen'],
    })
    .zip()
    .orderBy(db.desc('threadLastActive'))
    .skip(after || 0)
    .limit(first)
    .run();
};

module.exports = {
  checkForExistingDMThread,
  getDirectMessageThread,
  getDirectMessageThreads,
  getDirectMessageThreadsByUser,
};

	//@flow
	const { db } = require('shared/db');

	export type DBDirectMessageThread = {
	createdAt: Date,
	id: string,
	name?: string,
	threadLastActive: Date,
	};

	// prettier-ignore
	const checkForExistingDMThread = async (participants: Array<string>): Promise<?string> => {
	// return a list of all threadIds where both participants are active
	let idsToCheck = await db
	.table('usersDirectMessageThreads')
	.getAll(...participants, { index: 'userId' })
	.group('threadId')
	.map(row => row('userId'))
	.ungroup()
	.filter(row =>
	row('reduction')
	.count()
	.eq(participants.length)
	)
	.pluck('group')
	.run();

	if (!idsToCheck \|\| idsToCheck.length === 0) return null;

	// return only the thread Ids
	idsToCheck = idsToCheck.map(row => row.group);

	// given a list of threads where both users are active (includes all groups)
	// return only threads where these exact participants are used
	return await db
	.table('usersDirectMessageThreads')
	.getAll(...idsToCheck, { index: 'threadId' })
	.group('threadId')
	.ungroup()
	.filter(row =>
	row('reduction')
	.count()
	.eq(participants.length)
	)
	.pluck('group')
	.map(row => row('group'))
	.run()
	.then(results => (results && results.length > 0 ? results[0] : null));
	};

	// prettier-ignore
	const getDirectMessageThread = (directMessageThreadId: string): Promise<DBDirectMessageThread> => {
	return db
	.table('directMessageThreads')
	.get(directMessageThreadId)
	.run()
	.then(res => res && !res.deletedAt ? res : null);
	};

	// prettier-ignore
	const getDirectMessageThreads = (ids: Array<string>): Promise<Array<DBDirectMessageThread>> => {
	return db
	.table('directMessageThreads')
	.getAll(...ids)
	.filter(row => row.hasFields('deletedAt').not())
	.run();
	};

	const getDirectMessageThreadsByUser = (
	userId: string,
	// $FlowFixMe
	{ first, after }
	): Promise<Array<DBDirectMessageThread>> => {
	return db
	.table('usersDirectMessageThreads')
	.getAll(userId, { index: 'userId' })
	.filter(row => row.hasFields('deletedAt').not())
	.eqJoin('threadId', db.table('directMessageThreads'))
	.without({
	left: ['id', 'createdAt', 'threadId', 'userId', 'lastActive', 'lastSeen'],
	})
	.zip()
	.orderBy(db.desc('threadLastActive'))
	.skip(after \|\| 0)
	.limit(first)
	.run();
	};

	module.exports = {
	checkForExistingDMThread,
	getDirectMessageThread,
	getDirectMessageThreads,
	getDirectMessageThreadsByUser,
	};