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//@flow
const { db } = require('shared/db');
import { incrementMessageCount, decrementMessageCount } from './thread';
import type { DBMessage } from 'shared/types';
export type MessageTypes = 'text' | 'media';
export const getMessage = (messageId: string): Promise<DBMessage> => {
return db
.table('messages')
.get(messageId)
.run()
.then(message => {
if (!message || message.deletedAt) return null;
return message;
});
};
export const getManyMessages = (messageIds: string[]): Promise<DBMessage[]> => {
return db
.table('messages')
.getAll(...messageIds)
.run()
.then(messages => {
return messages.filter(message => message && !message.deletedAt);
});
};
type BackwardsPaginationOptions = { last?: number, before?: number | Date };
// prettier-ignore
const getBackwardsMessages = (threadId: string, { last, before }: BackwardsPaginationOptions) => {
return db
.table('messages')
.between(
[threadId, db.minval],
[threadId, before ? new Date(before) : db.maxval],
{ index: 'threadIdAndTimestamp' }
)
.orderBy({ index: db.desc('threadIdAndTimestamp') })
.filter(db.row.hasFields('deletedAt').not())
.limit(last || 0)
.run();
};
type ForwardsPaginationOptions = { first?: number, after?: number | Date };
// prettier-ignore
const getForwardMessages = (threadId: string, { first, after }: ForwardsPaginationOptions) => {
return db
.table('messages')
.between(
[threadId, after ? new Date(after) : db.minval],
[threadId, db.maxval],
{ index: 'threadIdAndTimestamp', leftBound: 'open', rightBound: 'closed' }
)
.orderBy({ index: 'threadIdAndTimestamp' })
.filter(db.row.hasFields('deletedAt').not())
.limit(first || 0)
.run();
};
export const getMessages = (
threadId: string,
{
first,
after,
last,
before,
}: { ...BackwardsPaginationOptions, ...ForwardsPaginationOptions }
): Promise<Array<DBMessage>> => {
// $FlowIssue
if (last || before) return getBackwardsMessages(threadId, { last, before });
// $FlowIssue
return getForwardMessages(threadId, { first, after });
};
export const getLastMessage = (threadId: string): Promise<?DBMessage> => {
return db
.table('messages')
.between([threadId, db.minval], [threadId, db.maxval], {
index: 'threadIdAndTimestamp',
leftBound: 'open',
rightBound: 'closed',
})
.orderBy({ index: db.desc('threadIdAndTimestamp') })
.filter(db.row.hasFields('deletedAt').not())
.limit(1)
.run()
.then(res => (Array.isArray(res) && res.length > 0 ? res[0] : null));
};
export const getLastMessageOfThreads = (
threadIds: Array<string>
): Promise<Array<?DBMessage>> => {
return Promise.all(threadIds.map(id => getLastMessage(id)));
};
// prettier-ignore
export const getMediaMessagesForThread = (threadId: string): Promise<Array<DBMessage>> => {
return db
.table('messages')
.getAll(threadId, { index: 'threadId' })
.filter({ messageType: 'media' })
.filter(db.row.hasFields('deletedAt').not())
.run();
};
export const getMessageCount = (threadId: string): Promise<number> => {
return db
.table('messages')
.getAll(threadId, { index: 'threadId' })
.filter(db.row.hasFields('deletedAt').not())
.count()
.run();
};
// prettier-ignore
export const getMessageCountInThreads = (threadIds: Array<string>): Promise<Array<mixed>> => {
return db
.table('messages')
.getAll(...threadIds, { index: 'threadId' })
.filter(db.row.hasFields('deletedAt').not())
.group('threadId')
.count()
.run();
};
export const deleteMessage = (userId: string, messageId: string) => {
return db
.table('messages')
.get(messageId)
.update(
{
deletedBy: userId,
deletedAt: new Date(),
},
{ returnChanges: 'always' }
)
.run()
.then(result => result.changes[0].new_val || result.changes[0].old_val)
.then(async message => {
await Promise.all([
message.threadType === 'story'
? decrementMessageCount(message.threadId)
: Promise.resolve(),
]);
return message;
});
};
// prettier-ignore
export const deleteMessagesInThread = async (threadId: string, userId: string) => {
const messages = await db
.table('messages')
.getAll(threadId, { index: 'threadId' })
.run();
if (!messages || messages.length === 0) return;
const deletePromise = db
.table('messages')
.getAll(threadId, { index: 'threadId' })
.update({
deletedBy: userId,
deletedAt: new Date(),
})
.run();
return await Promise.all([
deletePromise,
]).then(() => {
return Promise.all(Array.from({ length: messages.length }).map(() => decrementMessageCount(threadId)))
});
};
export const userHasMessagesInThread = (threadId: string, userId: string) => {
return db
.table('messages')
.getAll(threadId, { index: 'threadId' })
.filter(db.row.hasFields('deletedAt').not())('senderId')
.contains(userId)
.run();
};
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