36 lines
1.0 KiB
TypeScript
36 lines
1.0 KiB
TypeScript
import rndstr from 'rndstr';
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import { Note } from '../../../models/entities/note';
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import { User } from '../../../models/entities/user';
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import { PromoReads, PromoNotes, Notes, Users } from '../../../models';
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import { ensure } from '../../../prelude/ensure';
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export async function injectPromo(user: User, timeline: Note[]) {
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if (timeline.length < 5) return;
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// TODO: readやexpireフィルタはクエリ側でやる
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const reads = await PromoReads.find({
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userId: user.id
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});
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let promos = await PromoNotes.find();
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promos = promos.filter(n => n.expiresAt.getTime() > Date.now());
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promos = promos.filter(n => !reads.map(r => r.noteId).includes(n.noteId));
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if (promos.length === 0) return;
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const promo = promos[Math.floor(Math.random() * promos.length)];
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// Pick random promo
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const note = await Notes.findOne(promo.noteId).then(ensure);
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// Join
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note.user = await Users.findOne(note.userId).then(ensure);
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(note as any)._prInjectionId_ = rndstr('a-z0-9', 8);
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// Inject promo
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timeline.splice(3, 0, note);
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}
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