metaforecast/src/backend/frontpage.ts

import { Question } from "@prisma/client";

import { measureTime } from "./utils/measureTime";

export async function getFrontpage(): Promise<Question[]> {
  const questions = (
    await prisma.frontpageId.findMany({
      include: {
        question: true,
      },
    })
  )
    .map((f) => f.question)
    .filter((q) => q);
  return questions;
}

export async function rebuildFrontpage() {
  await measureTime(async () => {
    const rows = await prisma.$queryRaw<{ id: string }[]>`
      SELECT id FROM questions
      WHERE
        (qualityindicators->>'stars')::int >= 3
        AND description != ''
        AND JSONB_ARRAY_LENGTH(options) > 0
      ORDER BY RANDOM() LIMIT 50
    `;

    await prisma.$transaction([
      prisma.frontpageId.deleteMany({}),
      prisma.frontpageId.createMany({
        data: rows,
      }),
    ]);
  });
}