yogibook_aury_new/public/class/SchoolMail.php

<?php

/**
 * SchoolMail
 * Email agli allievi a nome di una scuola, con il template standard (mail/emailtemplate2.php).
 * Se l'invio fallisce registra l'errore e ritorna false: non blocca mai l'operazione.
 *
 *   SchoolMail::toStudent($email, $firstname, 'Oggetto', ['riga 1', 'riga 2']);
 *   SchoolMail::toStudent($email, $firstname, 'Oggetto', $lines, '', $schoolRow, true); // copia alla scuola
 *   SchoolMail::toMany([['email'=>..,'first_name'=>..], ...], 'Oggetto', $lines);       // invio di massa
 *
 * Le righe sono HTML: i dati variabili vanno passati già con htmlspecialchars().
 */

use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;

require_once __DIR__ . '/mailer.php';

class SchoolMail
{
    public static function toStudent(
        string $to,
        string $firstName,
        string $subject,
        array $lines,
        string $altText = '',
        ?array $school = null,
        bool $ccSchool = false
    ): bool {
        if (!filter_var($to, FILTER_VALIDATE_EMAIL)) {
            return false;
        }
        $school = $school ?? SchoolContext::get();
        $mail = self::mailer($school);
        try {
            $mail->addAddress($to);
            if ($ccSchool && !empty($school['email']) && filter_var($school['email'], FILTER_VALIDATE_EMAIL)) {
                $mail->addCC($school['email'], (string) $school['name']);
            }
            $mail->Subject = $subject;
            $mail->Body    = self::render($firstName, $lines, $school);
            $mail->AltBody = $altText !== '' ? $altText : strip_tags(implode("\n", $lines));
            $mail->send();
            return true;
        } catch (Exception $e) {
            error_log('SchoolMail error (' . $to . '): ' . $mail->ErrorInfo);
            return false;
        }
    }

    /**
     * Invio di massa con una sola connessione SMTP.
     * @param array $recipients [['email' => ..., 'first_name' => ...], ...]
     * @return array{sent:int, failed:int}
     */
    public static function toMany(array $recipients, string $subject, array $lines, ?array $school = null): array
    {
        $school = $school ?? SchoolContext::get();
        $mail = self::mailer($school);
        $mail->SMTPKeepAlive = true;
        $sent = 0;
        $failed = 0;

        foreach ($recipients as $r) {
            $to = (string) ($r['email'] ?? '');
            if (!filter_var($to, FILTER_VALIDATE_EMAIL)) {
                $failed++;
                continue;
            }
            try {
                $mail->clearAddresses();
                $mail->addAddress($to);
                $mail->Subject = $subject;
                $mail->Body    = self::render((string) ($r['first_name'] ?? ''), $lines, $school);
                $mail->AltBody = strip_tags(implode("\n", $lines));
                $mail->send();
                $sent++;
            } catch (Exception $e) {
                error_log('SchoolMail bulk error (' . $to . '): ' . $mail->ErrorInfo);
                $failed++;
                $mail->getSMTPInstance()->reset();
            }
        }
        $mail->smtpClose();
        return ['sent' => $sent, 'failed' => $failed];
    }

    /* ------------------------------------------------------------------ */

    private static function mailer(array $school): PHPMailer
    {
        $schoolName = (string) ($school['name'] ?? 'YogiBook');
        $mail = new PHPMailer(true);
        $mail->isSMTP();
        $mail->Host       = $_ENV['MAIL_HOST'];
        $mail->SMTPAuth   = true;
        $mail->Username   = $_ENV['MAIL_USERNAME'];
        $mail->Password   = $_ENV['MAIL_PASSWORD'];
        $mail->SMTPSecure = $_ENV['MAIL_ENCRYPTION'];
        $mail->Port       = (int) $_ENV['MAIL_PORT'];
        $mail->CharSet    = 'UTF-8';
        $mail->Timeout    = 20;
        $mail->isHTML(true);
        $mail->setFrom($_ENV['MAIL_FROM_ADDRESS'], $schoolName ?: ($_ENV['MAIL_FROM_NAME'] ?? 'YogiBook'));
        if (!empty($school['email']) && filter_var($school['email'], FILTER_VALIDATE_EMAIL)) {
            $mail->addReplyTo($school['email'], $schoolName);
        }
        return $mail;
    }

    private static function render(string $firstName, array $lines, array $school): string
    {
        $schoolName = (string) ($school['name'] ?? 'YogiBook');
        $appUrl = rtrim($_ENV['APP_URL'] ?? 'https://yogibook.yogasoul.it', '/');
        $h  = fn($v) => htmlspecialchars((string) $v, ENT_QUOTES, 'UTF-8');
        $p  = "<p style='font-size: 14px; line-height: 190%;'><span style='font-size: 16px; line-height: 30.4px;'>";
        $pe = "</span></p>";
        $btn = "box-sizing: border-box; display: inline-block; text-decoration: none; text-align: center; color: #FFFFFF; background-color: #3AAEE0; border-radius: 4px; font-size: 14px;";

        $greeting = trim($firstName) !== '' ? 'Ciao ' . $h($firstName) . ',' : 'Ciao,';
        $body = "<p style='font-size: 14px; line-height: 190%;'><span style='font-size: 18px; line-height: 34.2px;'><strong>{$greeting}</strong></span></p>";
        foreach ($lines as $line) {
            $body .= $p . $line . $pe;
        }
        $body .= "<br>{$p}Per vedere e gestire le tue lezioni: <a href='{$appUrl}'>YogiBook</a>{$pe}"
            . "<br>{$p}Se non ricordi la password o non sei mai entrata/o in YogiBook, reimpostala da qui:{$pe}<br>"
            . "<a href='{$appUrl}/password/reset' target='_blank' style='{$btn}'><span style='display: block; padding: 10px 20px; line-height: 120%;'>Reimposta password</span></a>"
            . "<br><br>{$p}Ci vediamo sul tappetino!{$pe}{$p}" . $h($schoolName) . $pe;

        // Variabili attese dal template
        $messageedit = $body;
        $buttonedit  = "<a href='{$appUrl}/' target='_blank' class='v-button v-font-size' style='{$btn}'>"
            . "<span style='display: block; padding: 10px 20px; line-height: 120%;'>YogiBook - " . $h($schoolName) . "</span></a>";
        $mailmessage1 = '';
        include __DIR__ . '/../mail/emailtemplate2.php';
        return $mailmessage1 ?: $body;
    }
}