Cedric Abonnel
47 lines
1.5 KiB
PHP
47 lines
1.5 KiB
PHP
<?php
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declare(strict_types=1);
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class RatingManager
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{
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public function __construct(private PDO $pdo)
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{
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}
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public function rate(string $uuid, string $email, int $rating): void
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{
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$st = $this->pdo->prepare(
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'INSERT INTO article_ratings (article_uuid, user_email, rating)
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VALUES (:uuid, :email, :r)
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ON CONFLICT (article_uuid, user_email)
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DO UPDATE SET rating = :r, rated_at = NOW()'
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);
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$st->execute([':uuid' => $uuid, ':email' => strtolower($email), ':r' => $rating]);
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}
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/** @return array{avg: float|null, count: int} */
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public function statsForArticle(string $uuid): array
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{
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$st = $this->pdo->prepare(
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'SELECT ROUND(AVG(rating)::numeric, 1) as avg, COUNT(*) as count
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FROM article_ratings WHERE article_uuid = :uuid'
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);
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$st->execute([':uuid' => $uuid]);
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$row = $st->fetch(PDO::FETCH_ASSOC);
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return [
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'avg' => $row && $row['avg'] !== null ? (float)$row['avg'] : null,
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'count' => $row ? (int)$row['count'] : 0,
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];
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}
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public function userRating(string $uuid, string $email): ?int
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{
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$st = $this->pdo->prepare(
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'SELECT rating FROM article_ratings WHERE article_uuid = :uuid AND user_email = :email'
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);
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$st->execute([':uuid' => $uuid, ':email' => strtolower($email)]);
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$v = $st->fetchColumn();
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return $v !== false ? (int)$v : null;
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}
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}
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