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// @flow
import type { GraphQLContext } from '../../';
import type { PaginationOptions } from '../../utils/paginate-arrays';
import { getThreadsByChannel } from '../../models/thread';
import { encode, decode } from '../../utils/base64';
import { canViewChannel } from '../../utils/permissions';
import type { DBChannel } from 'shared/types';
export default async (
channel: DBChannel,
{ first, after }: PaginationOptions,
ctx: GraphQLContext
) => {
const { id, isPrivate } = channel;
const { loaders, user: currentUser } = ctx;
if (isPrivate) {
if (!(await canViewChannel(currentUser, id, loaders))) return null;
}
// $FlowFixMe
return getThreadsByChannel(id, {
first,
after: after && parseInt(decode(after), 10),
}).then(threads => ({
pageInfo: {
hasNextPage: threads.length >= first,
},
edges: threads.map(thread => ({
cursor: encode(String(thread.lastActive.getTime())),
node: thread,
})),
}));
};
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