@c1x/nest-mailer/dist/mailer.service.js

A flexible and easy-to-use mailer module for NestJS applications, supporting multiple email providers including SMTP, AWS SES, and SendGrid.

"use strict";
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
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};
var __metadata = (this && this.__metadata) || function (k, v) {
    if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
};
var __param = (this && this.__param) || function (paramIndex, decorator) {
    return function (target, key) { decorator(target, key, paramIndex); }
};
var MailerService_1;
Object.defineProperty(exports, "__esModule", { value: true });
exports.MailerService = void 0;
const common_1 = require("@nestjs/common");
const handlebars = require("handlebars");
const fs = require("fs");
const path = require("path");
const aws_ses_provider_1 = require("./providers/aws-ses.provider");
const sendgrid_provider_1 = require("./providers/sendgrid.provider");
const smtp_provider_1 = require("./providers/smtp.provider");
let MailerService = MailerService_1 = class MailerService {
    constructor(config) {
        this.config = config;
        this.logger = new common_1.Logger(MailerService_1.name);
        this.provider = this.initializeProvider(config);
        this.templatesDir = config.templatesDir || path.join(process.cwd(), 'templates');
        this.registerHandlebarsHelpers();
    }
    initializeProvider(config) {
        try {
            switch (config.provider) {
                case 'aws-ses':
                    return new aws_ses_provider_1.AwsSesProvider(config.credentials);
                case 'sendgrid':
                    return new sendgrid_provider_1.SendGridProvider(config.credentials);
                case 'smtp':
                    return new smtp_provider_1.SmtpProvider(config.credentials);
                default:
                    throw new Error(`Unsupported mail provider: ${config.provider}`);
            }
        }
        catch (error) {
            this.logger.error(`Failed to initialize mail provider: ${error.message}`);
            throw error;
        }
    }
    registerHandlebarsHelpers() {
        handlebars.registerHelper('formatDate', function (date, format) {
            return new Date(date).toLocaleDateString();
        });
        handlebars.registerHelper('formatCurrency', function (amount) {
            return new Intl.NumberFormat('en-US', {
                style: 'currency',
                currency: 'USD'
            }).format(amount);
        });
    }
    async compileTemplate(templateName, context) {
        try {
            const templatePath = path.join(this.templatesDir, `${templateName}.hbs`);
            if (!fs.existsSync(templatePath)) {
                throw new Error(`Template not found: ${templateName}.hbs`);
            }
            const templateContent = await fs.promises.readFile(templatePath, 'utf8');
            const template = handlebars.compile(templateContent);
            const partialsDir = path.join(this.templatesDir, 'partials');
            if (fs.existsSync(partialsDir)) {
                const partialFiles = fs.readdirSync(partialsDir);
                for (const partialFile of partialFiles) {
                    if (partialFile.endsWith('.hbs')) {
                        const partialName = path.basename(partialFile, '.hbs');
                        const partialContent = fs.readFileSync(path.join(partialsDir, partialFile), 'utf8');
                        handlebars.registerPartial(partialName, partialContent);
                    }
                }
            }
            return template(context);
        }
        catch (error) {
            this.logger.error(`Template compilation failed: ${error.message}`);
            throw error;
        }
    }
    async sendMail(options) {
        try {
            let htmlContent = options.html;
            if (options.template) {
                this.logger.debug(`Compiling template: ${options.template}`);
                htmlContent = await this.compileTemplate(options.template, options.context);
            }
            const mailOptions = Object.assign(Object.assign({}, options), { html: htmlContent, from: options.fromAddress });
            this.validateMailOptions(mailOptions);
            this.logger.debug(`Sending email to: ${mailOptions.to}`);
            await this.provider.sendMail(mailOptions);
            this.logger.debug('Email sent successfully');
        }
        catch (error) {
            this.logger.error(`Failed to send email: ${error.message}`, error.stack);
            throw error;
        }
    }
    validateMailOptions(options) {
        if (!options.to) {
            throw new Error('Recipient (to) is required');
        }
        if (!options.subject) {
            throw new Error('Subject is required');
        }
        if (!options.html && !options.text) {
            throw new Error('Either html or text content is required');
        }
    }
};
exports.MailerService = MailerService;
exports.MailerService = MailerService = MailerService_1 = __decorate([
    (0, common_1.Injectable)(),
    __param(0, (0, common_1.Inject)('MAILER_CONFIG')),
    __metadata("design:paramtypes", [Object])
], MailerService);
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