<?php

namespace BSR\Lib\db;

class DbHelper
{
    /**
     * Retrieve the list of all readers (volunteers) having read at least 4 books (2 notices per book).
     * Returns an associative array containing $lastname and $firstname
     */
    public static function ListOfReaders()
    {
        $sql = "SELECT
                    count(*),
                    ContentShortPart AS name
                FROM NoticeFields
                WHERE Tag=901
                GROUP BY ContentShortPart
                HAVING count(*) > 6
                ORDER BY SUBSTRING(ContentShortPart, CHARINDEX(' ', ContentShortPart)+1, 15);";

        $results = Connection::execute($sql);
        return array_map(function($row) {
            $fullname = str_replace("*", "", $row['name']);
            $parts = explode(" ", $fullname);
            $firstname = array_shift($parts);
            $lastname = implode(" ", $parts);
            return array(
                'lastname' => $lastname,
                'firstname' => $firstname);
        }, $results->to_array());
    }

    /**
     * Retrieve the list of all type available in the database.
     * @param boolean $withJeunesse add 'Jeunesse' to the list
     * @return array
     */
    public static function ListOfGenres($withJeunesse = false)
    {
        $sql = "SELECT DISTINCT
                    LTRIM(RTRIM(Codes.Code)) as code,
                    LTRIM(RTRIM(Codes.TextFre)) AS text
                FROM Codes
                INNER JOIN Notices ON Codes.Code = Notices.MediaType2Code
                WHERE
                    Codes.Type = 2
                    AND Notices.NoticeNr NOT LIKE '%~%'
                    AND Notices.NoticeNr NOT LIKE '%V%'
                    AND Notices.NoticeNr NOT LIKE '%T%'
                    AND Notices.MediaType1Code = 'CDD';";

        $results = Connection::execute($sql)->to_array();

        if($withJeunesse) {
            array_unshift($results, array('code' => 'J', 'text' => 'Jeunesse'));
        }

        return $results;
    }

    /**
     * Retrieve the list of all books currently lent to readers.
     */
    public static function InReading()
    {
        $sql = "SELECT
                    NoticeNr, title, author, displayName
                FROM notices, items, circulations, UserAccounts
                WHERE
                    MediaType1code='N' and NoticeNr not like '%~%'
                    AND items.NoticeID = notices.NoticeID
                    AND items.ItemID = circulations.ItemID
                    AND UserAccounts.UserAccountID = circulations.UserAccountID
                ORDER BY author, title;";

        $results = Connection::execute($sql);
        return array_map(function($row) {
            return array(
                "NoticeNr" => $row['NoticeNr'],
                "auteur" => $row['author'],
                "titre" => $row['title'],
                "lecteur" => $row['displayName']
            );
        }, $results->to_array());
    }
}