<?php

function getProjects($page = 1, $limit = 5) 
{
    if (!is_integer($page)) {
        throw new InvalidArgumentException('The argument "page" must be an interger.');
    }
    
    if (!is_integer($limit)) {
        throw new InvalidArgumentException('The argument "limit" must be an interger.');
    }

    $from = ($page - 1) * $limit;

    $pdo = getDatabaseConnection();

    $query = $pdo->prepare('select id, title, illustration, description, date from project limit :from, :limit');
    
    $query->bindParam(':from', $from, PDO::PARAM_INT);
    $query->bindParam(':limit', $limit, PDO::PARAM_INT);

    $query->execute();

    return $query->fetchAll();
}

function getProject($id) 
{
    if (!is_integer($id)) {
        throw new InvalidArgumentException('The argument "id" must be an interger.');
    }

    $pdo = getDatabaseConnection();

    $query = $pdo->prepare('select id, title, illustration, description, date from project where id=:id');
    
    $query->bindParam(':id', $id, PDO::PARAM_INT);

    $query->execute();

    return $query->fetch();
}

function getProjectNumberOfPages($maxPerPage) 
{
    if (!is_integer($maxPerPage)) {
        throw new InvalidArgumentException('The argument "maxPerPage" must be an interger.');
    }
    
    $pdo = getDatabaseConnection();

    $query = $pdo->prepare('select count(*) as total from project');

    $query->execute();

    $result = $query->fetch();

    return ceil($result['total'] / $maxPerPage);
}

function getCommentsByProject($id) 
{
    // À réaliser
}