import { PrismaClient, User } from '@prisma/client';
import { MailContext } from './mail-context';
export declare enum mailLogType {
    SubscriptionFlow = 0,
    UserFlow = 1,
    SystemMail = 2
}
export type MailControllerConfig = {
    daysAwayFromEnding?: number | null;
    externalMailTemplateId: string;
    recipient: User;
    isRetry?: boolean;
    periodicJobRunDate?: Date | null;
    optionalData: Record<string, any>;
    mailType: mailLogType;
};
export declare class MailController {
    private readonly prismaService;
    private readonly mailContext;
    private readonly config;
    private readonly logger;
    constructor(prismaService: PrismaClient, mailContext: MailContext, config: MailControllerConfig);
    /**
     * Build a string uniquely identifying the email delivery
     * @returns the identification string
     */
    private generateMailIdentifier;
    /**
     * Get the number of mails with the specified MailIdentifier. Any number > 0
     * means the mail was already sent.
     * @returns number of mails with this identifier
     */
    private checkIfMailIsSent;
    /**
     * Build the data for passing it to the mail templates
     * @returns a HashMap of configuration data
     */
    private buildData;
    /**
     * Send an email using a specific template with the configured mail provider.
     * This method stores an entry in the MailLog table for referencing and
     * re-trying the delivery.
     * @returns void
     */
    sendMail(): Promise<void>;
}