<?php

class DB {

	private $conn;

	function __construct () {
		include 'connexion.php';
		try {
			$this->conn = new PDO('pgsql:host=localhost;port=5432;dbname=apisub', $db_user, $db_pass);
		} catch (PDOException $e) {
			die('Connection failed: ' . $e->getMessage());
		}
	}

	function subList(string $utclogin) : array {
		$sql = 'SELECT *
						FROM vsubscription
						WHERE	utclogin=:utclogin';
		$st = $this->conn->prepare($sql);
		$st->execute([
			'utclogin' => $utclogin,
		]);
		$res = $st->fetchAll(PDO::FETCH_ASSOC);

		return $res;
	}

	function apiList(string $semester, int $year) : array {
		$sql = 'SELECT *
						FROM vApi
						WHERE semester=:semester AND year=:year';
		$st = $this->conn->prepare($sql);
		$st->execute([
			'semester' => $semester,
			'year' => $year,
		]);
		$res = $st->fetchAll(PDO::FETCH_ASSOC);
		
		return $res;
	}

	function subToApi($utclogin, $api) : bool {
		$today = date('Ymd');
		$sql = 'INSERT INTO subscribe(utclogin, api, subdate) VALUES (:utclogin, :api, :today)';
		$st = $this->conn->prepare($sql);
		$res = $st->execute([
			'utclogin' => $utclogin,
			'api' => $api,
			'today' => $today,
		]);

		return $res;
	}

	function unsubToApi($utclogin, $api) : bool {
		$sql = 'DELETE FROM subscribe WHERE utclogin=:utclogin AND api=:api';
		$st = $this->conn->prepare($sql);
		$res = $st->execute([
			'utclogin' => $utclogin,
			'api' => $api,
		]);
		
		return $res;
	}
}