chore: template

src/app.module.ts

@@ -22,6 +22,7 @@ import { MailServerModule } from "./modules/mail-server/mail-server.module";
 import { MailboxModule } from "./modules/mailbox/mailbox.module";
 import { QuotaSyncModule } from "./modules/quota-sync/quota-sync.module";
 import { EmailSignaturesModule } from "./modules/signatures/email-signatures.module";
+import { TemplatesModule } from "./modules/templates/templates.module";
 import { UsersModule } from "./modules/users/users.module";
 import { UtilsModule } from "./modules/utils/utils.module";
 
@@ -44,6 +45,7 @@ import { UtilsModule } from "./modules/utils/utils.module";
     MailServerModule,
     QuotaSyncModule,
     EmailSignaturesModule,
+    TemplatesModule,
   ],
 })
 export class AppModule implements NestModule {

src/common/enums/message.enum.ts

@@ -449,3 +449,26 @@ export const enum SignatureMessage {
   DELETED = "امضاء با موفقیت حذف شد",
   TOGGLE_ACTIVE = "وضعیت امضاء با موفقیت تغییر کرد",
 }
+
+export const enum TemplateMessage {
+  TEMPLATE_NOT_FOUND = "قالب یافت نشد",
+  TEMPLATE_CREATED_SUCCESSFULLY = "قالب با موفقیت ایجاد شد",
+  TEMPLATE_UPDATED_SUCCESSFULLY = "قالب با موفقیت به روزرسانی شد",
+  TEMPLATE_DELETED_SUCCESSFULLY = "قالب با موفقیت حذف شد",
+  TEMPLATE_RETRIEVED_SUCCESSFULLY = "قالب با موفقیت دریافت شد",
+  TEMPLATES_LISTED_SUCCESSFULLY = "لیست قالب ها با موفقیت دریافت شد",
+  TEMPLATE_NAME_REQUIRED = "نام قالب الزامی است",
+  TEMPLATE_NAME_STRING = "نام قالب باید یک رشته باشد",
+  TEMPLATE_NAME_MAX_LENGTH = "نام قالب نمیتواند بیشتر از ۲۵۵ کاراکتر باشد",
+  TEMPLATE_STRUCTURE_REQUIRED = "ساختار قالب الزامی است",
+  TEMPLATE_STRUCTURE_VALID = "ساختار قالب باید معتبر باشد",
+  TEMPLATE_RAW_HTML_STRING = "HTML خام باید یک رشته باشد",
+  TEMPLATE_BUSINESS_ID_REQUIRED = "شناسه کسب و کار الزامی است",
+  TEMPLATE_BUSINESS_ID_UUID = "شناسه کسب و کار باید یک UUID معتبر باشد",
+  TEMPLATE_ID_REQUIRED = "شناسه قالب الزامی است",
+  TEMPLATE_ID_UUID = "شناسه قالب باید یک UUID معتبر باشد",
+  TEMPLATE_ACCESS_DENIED = "شما دسترسی به این قالب را ندارید",
+  TEMPLATE_BUSINESS_NOT_FOUND = "کسب و کار مالک قالب یافت نشد",
+  SEARCH_STRING = "نام برای جستجو باید یک رشته باشد",
+  TEMPLATE_SELECTED_SUCCESSFULLY = "وضعیت قالب با موفقیت تغییر کرد",
+}

src/modules/businesses/entities/business.entity.ts

@@ -4,6 +4,7 @@ import { BusinessStaff } from "./business-staff.entity";
 import { BaseEntity } from "../../../common/entities/base.entity";
 import { Domain } from "../../domains/entities/domain.entity";
 import { EmailSignature } from "../../signatures/entities/email-signature.entity";
+import { Template } from "../../templates/entities/template.entity";
 import { BusinessRepository } from "../repositories/business.repository";
 
 @Entity({ repository: () => BusinessRepository })
@@ -47,5 +48,8 @@ export class Business extends BaseEntity {
   @OneToMany(() => BusinessStaff, (businessStaff) => businessStaff.business)
   businessStaffs = new Collection<BusinessStaff>(this);
 
+  @OneToMany(() => Template, (template) => template.business)
+  templates = new Collection<Template>(this);
+
   [EntityRepositoryType]?: BusinessRepository;
 }

src/modules/email/email.module.ts

@@ -1,3 +1,4 @@
+import { MikroOrmModule } from "@mikro-orm/nestjs";
 import { Module } from "@nestjs/common";
 import { JwtModule } from "@nestjs/jwt";
 
@@ -9,12 +10,15 @@ import { MailboxResolverService } from "./services/mailbox-resolver.service";
 import { WebSocketAuthService } from "./services/websocket-auth.service";
 import { jwtConfig } from "../../configs/jwt.config";
 import { MailServerModule } from "../mail-server/mail-server.module";
+import { TemplateProcessorService } from "../templates/services/template-processor.service";
+import { TemplatesModule } from "../templates/templates.module";
+import { User } from "../users/entities/user.entity";
 import { UsersModule } from "../users/users.module";
 
 @Module({
-  imports: [MailServerModule, UsersModule, JwtModule.registerAsync(jwtConfig())],
+  imports: [MailServerModule, UsersModule, TemplatesModule, JwtModule.registerAsync(jwtConfig()), MikroOrmModule.forFeature([User])],
   controllers: [EmailController],
-  providers: [EmailService, MailboxResolverService, EmailGateway, EmailNotificationService, WebSocketAuthService],
+  providers: [EmailService, MailboxResolverService, EmailGateway, EmailNotificationService, WebSocketAuthService, TemplateProcessorService],
-  exports: [EmailService, MailboxResolverService, EmailGateway, EmailNotificationService, WebSocketAuthService],
+  exports: [EmailService, MailboxResolverService, EmailGateway, EmailNotificationService, WebSocketAuthService, TemplateProcessorService],
 })
 export class EmailModule {}

src/modules/email/services/email.service.ts

@@ -5,6 +5,8 @@ import { MailboxResolverService } from "./mailbox-resolver.service";
 import { EmailMessage } from "../../../common/enums/message.enum";
 import { MailServerService } from "../../mail-server/services/mail-server.service";
 import { MailboxEnum } from "../../mailbox/enums/mailbox.enum";
+import { TemplateProcessorService } from "../../templates/services/template-processor.service";
+import { UserRepository } from "../../users/repositories/user.repository";
 import { BulkActionDto, BulkActionType } from "../DTO/bulk-actions.dto";
 import { MessageListQueryDto, SearchMessagesQueryDto } from "../DTO/email-query.dto";
 import { SendEmailDto, UpdateDraftDto } from "../DTO/send-email.dto";
@@ -19,16 +21,39 @@ export class EmailService {
     private readonly mailServerService: MailServerService,
     private readonly mailboxResolverService: MailboxResolverService,
     private readonly emailGateway: EmailGateway,
-    // private readonly userService: UsersService,
+    private readonly templateProcessorService: TemplateProcessorService,
+    private readonly userRepository: UserRepository,
   ) {}
 
   //########################################################
   async sendEmail(userEmailId: string, sendEmailDto: SendEmailDto) {
-    // const userEmailId = await this.userService.getUserEmailIdFromId(userId);
-
     this.logger.log(`Sending email from user ${userEmailId} to ${sendEmailDto.to.map((t) => t.address).join(", ")}`);
 
     try {
+      // Get user's business information
+      const user = await this.userRepository.findOne({ wildduckUserId: userEmailId, deletedAt: null }, { populate: ["business"] });
+
+      if (user && user.business) {
+        this.logger.log(`Processing email through business template for business: ${user.business.id}`);
+
+        // Process email content through business template
+        const processedTemplate = await this.templateProcessorService.processEmailWithTemplate(user.business.id, {
+          text: sendEmailDto.text,
+          html: sendEmailDto.html,
+          subject: sendEmailDto.subject,
+        });
+
+        // Update the DTO with processed content
+        sendEmailDto.html = processedTemplate.html;
+        sendEmailDto.text = processedTemplate.text;
+
+        if (processedTemplate.hasTemplate) {
+          this.logger.log(`Email content processed through template for business: ${user.business.id}`);
+        }
+      } else {
+        this.logger.log(`No business template found for user ${userEmailId}, sending original content`);
+      }
+
       const response = await firstValueFrom(this.mailServerService.submission.submitMessage(userEmailId, sendEmailDto));
 
       this.logger.log(`Email sent successfully: ${response.id} (Queue: ${response.queueId})`);
@@ -381,6 +406,24 @@ export class EmailService {
         },
       };
 
+      // Process draft content through business template if available
+      const user = await this.userRepository.findOne({ wildduckUserId: userEmailId, deletedAt: null }, { populate: ["business"] });
+
+      if (user && user.business && (updateDraftDto.text || updateDraftDto.html)) {
+        const processedTemplate = await this.templateProcessorService.processEmailWithTemplate(user.business.id, {
+          text: updateDraftDto.text,
+          html: updateDraftDto.html,
+          subject: updateDraftDto.subject,
+        });
+
+        draftData.html = processedTemplate.html;
+        draftData.text = processedTemplate.text;
+
+        if (processedTemplate.hasTemplate) {
+          this.logger.log(`Draft content processed through template for business: ${user.business.id}`);
+        }
+      }
+
       const response = await firstValueFrom(this.mailServerService.submission.submitMessage(userEmailId, draftData));
 
       this.logger.log(`Draft updated successfully: ${response.id}`);

src/modules/quota-sync/services/quota-sync.service.ts

@@ -27,7 +27,7 @@ export class QuotaSyncService {
   /**
    * Sync quota usage every 2 hours
    */
-  @Cron(CronExpression.EVERY_10_SECONDS)
+  @Cron(CronExpression.EVERY_2_HOURS)
   async syncAllUsersQuota(): Promise<void> {
     const em = this.em.fork();
     this.logger.log("Starting quota synchronization for all users");
@@ -66,7 +66,7 @@ export class QuotaSyncService {
   /**
    * Sync business quota usage every 4 hours
    */
-  @Cron(CronExpression.EVERY_10_SECONDS)
+  @Cron(CronExpression.EVERY_4_HOURS)
   async syncAllBusinessQuotas(): Promise<void> {
     const em = this.em.fork();
     this.logger.log("Starting business quota synchronization");

src/modules/templates/DTO/create-template.dto.ts

@@ -0,0 +1,51 @@
+import { ApiProperty, ApiPropertyOptional } from "@nestjs/swagger";
+import { IsNotEmpty, IsOptional, IsString, MaxLength } from "class-validator";
+
+import { TemplateMessage } from "../../../common/enums/message.enum";
+// import { PersonalityDataType } from "../interfaces/structure.interface";
+
+export class CreateTemplateDto {
+  @IsNotEmpty({ message: TemplateMessage.TEMPLATE_NAME_REQUIRED })
+  @IsString({ message: TemplateMessage.TEMPLATE_NAME_STRING })
+  @MaxLength(255, { message: TemplateMessage.TEMPLATE_NAME_MAX_LENGTH })
+  @ApiProperty({ description: "Template name", example: "Corporate Email Template", maxLength: 255 })
+  name: string;
+
+  @IsNotEmpty({ message: TemplateMessage.TEMPLATE_STRUCTURE_REQUIRED })
+  // @ValidateNested({ message: TemplateMessage.TEMPLATE_STRUCTURE_VALID })
+  // @Type(() => Object)
+  @ApiProperty({
+    description: "Template structure containing header, content, and footer sections",
+    example: {
+      header: {
+        columnsCount: 1,
+        items: [],
+      },
+      content: {
+        columnsCount: 2,
+        items: [],
+      },
+      footer: {
+        columnsCount: 1,
+        items: [],
+      },
+    },
+  })
+  structure: Record<string, unknown>;
+
+  @IsOptional()
+  @IsString({ message: TemplateMessage.TEMPLATE_RAW_HTML_STRING })
+  @ApiPropertyOptional({
+    description: "Raw HTML content of the template (optional)",
+    example: "<html><body><h1>Template Content</h1></body></html>",
+  })
+  rawHtml?: string;
+
+  //   @IsNotEmpty({ message: "شناسه کسب و کار الزامی است" })
+  //   @IsUUID("7", { message: "شناسه کسب و کار باید یک UUID معتبر باشد" })
+  //   @ApiProperty({
+  //     description: "Business ID that owns this template",
+  //     example: "01234567-89ab-cdef-0123-456789abcdef",
+  //   })
+  //   businessId: string;
+}

src/modules/templates/DTO/index.ts

@@ -0,0 +1,4 @@
+export { CreateTemplateDto } from "./create-template.dto";
+export { UpdateTemplateDto } from "./update-template.dto";
+export { TemplateQueryDto } from "./template-query.dto";
+export { TemplateParamDto } from "./template-param.dto";

src/modules/templates/DTO/template-param.dto.ts

@@ -0,0 +1,14 @@
+import { ApiProperty } from "@nestjs/swagger";
+import { IsNotEmpty, IsUUID } from "class-validator";
+
+import { TemplateMessage } from "../../../common/enums/message.enum";
+
+export class TemplateParamDto {
+  @IsNotEmpty({ message: TemplateMessage.TEMPLATE_ID_REQUIRED })
+  @IsUUID("7", { message: TemplateMessage.TEMPLATE_ID_UUID })
+  @ApiProperty({
+    description: "Template ID",
+    example: "01234567-89ab-cdef-0123-456789abcdef",
+  })
+  id: string;
+}

src/modules/templates/DTO/template-query.dto.ts

@@ -0,0 +1,20 @@
+import { ApiPropertyOptional } from "@nestjs/swagger";
+import { IsOptional, IsString, IsUUID } from "class-validator";
+
+import { PaginationDto } from "../../../common/DTO/pagination.dto";
+import { TemplateMessage } from "../../../common/enums/message.enum";
+
+export class TemplateQueryDto extends PaginationDto {
+  @IsOptional()
+  @IsString({ message: TemplateMessage.SEARCH_STRING })
+  @ApiPropertyOptional({
+    description: "Search by template name",
+    example: "corporate",
+  })
+  search?: string;
+
+  @IsOptional()
+  @IsUUID("7", { message: TemplateMessage.TEMPLATE_BUSINESS_ID_UUID })
+  @ApiPropertyOptional({ description: "Filter by business ID", example: "01234567-89ab-cdef-0123-456789abcdef" })
+  businessId?: string;
+}

src/modules/templates/DTO/update-template.dto.ts

@@ -0,0 +1,44 @@
+import { ApiPropertyOptional } from "@nestjs/swagger";
+import { Type } from "class-transformer";
+import { IsOptional, IsString, MaxLength, ValidateNested } from "class-validator";
+
+import { TemplateMessage } from "../../../common/enums/message.enum";
+import { PersonalityDataType } from "../interfaces/structure.interface";
+
+export class UpdateTemplateDto {
+  @IsOptional()
+  @IsString({ message: TemplateMessage.TEMPLATE_NAME_STRING })
+  @MaxLength(255, { message: TemplateMessage.TEMPLATE_NAME_MAX_LENGTH })
+  @ApiPropertyOptional({ description: "Template name", example: "Updated Corporate Email Template", maxLength: 255 })
+  name?: string;
+
+  @IsOptional()
+  @ValidateNested({ message: TemplateMessage.TEMPLATE_STRUCTURE_VALID })
+  @Type(() => Object)
+  @ApiPropertyOptional({
+    description: "Template structure containing header, content, and footer sections",
+    example: {
+      header: {
+        columnsCount: 1,
+        items: [],
+      },
+      content: {
+        columnsCount: 2,
+        items: [],
+      },
+      footer: {
+        columnsCount: 1,
+        items: [],
+      },
+    },
+  })
+  structure?: PersonalityDataType;
+
+  @IsOptional()
+  @IsString({ message: TemplateMessage.TEMPLATE_RAW_HTML_STRING })
+  @ApiPropertyOptional({
+    description: "Raw HTML content of the template",
+    example: "<html><body><h1>Updated Template Content</h1></body></html>",
+  })
+  rawHtml?: string;
+}

src/modules/templates/entities/template.entity.ts

@@ -0,0 +1,38 @@
+import { Collection, Entity, EntityRepositoryType, ManyToOne, OneToMany, Opt, Property } from "@mikro-orm/core";
+import { v7 as uuidv7 } from "uuid";
+
+import { BaseEntity } from "../../../common/entities/base.entity";
+import { Business } from "../../businesses/entities/business.entity";
+import { User } from "../../users/entities/user.entity";
+// import { PersonalityDataType } from "../interfaces/structure.interface";
+import { TemplateRepository } from "../repositories/template.repository";
+
+@Entity({ repository: () => TemplateRepository })
+export class Template extends BaseEntity {
+  @Property({ type: "varchar", length: 255, nullable: false })
+  name: string;
+
+  @Property({ type: "jsonb" })
+  structure: unknown;
+
+  @Property({ type: "text", nullable: true })
+  rawHtml?: string;
+
+  @Property({ type: "uuid", onCreate: () => uuidv7() })
+  currentVersion: string;
+
+  @Property({ type: "boolean", default: false })
+  selected: boolean & Opt;
+
+  //--------------------------------------------------
+
+  @OneToMany(() => User, (user) => user.template)
+  users = new Collection<User>(this);
+
+  //--------------------------------------------------
+
+  @ManyToOne(() => Business, { nullable: false, deleteRule: "cascade" })
+  business!: Business;
+
+  [EntityRepositoryType]?: TemplateRepository;
+}

src/modules/templates/interfaces/structure.interface.ts

@@ -0,0 +1,104 @@
+export enum HorizontalAlignment {
+  LEFT = "left",
+  CENTER = "center",
+  RIGHT = "right",
+}
+
+export enum VerticalAlignment {
+  TOP = "top",
+  MIDDLE = "middle",
+  BOTTOM = "bottom",
+}
+
+export enum ButtonSize {
+  SMALL = "small",
+  MEDIUM = "medium",
+  LARGE = "large",
+}
+
+export enum ImageSize {
+  COVER = "cover",
+  CONTAIN = "contain",
+  AUTO = "auto",
+  REPEAT = "repeat",
+  REPEAT_X = "repeat-x",
+  REPEAT_Y = "repeat-y",
+  NO_REPEAT = "no-repeat",
+}
+
+export enum BackgroundSize {
+  COVER = "cover",
+  CONTAIN = "contain",
+  ROUND = "round",
+}
+
+export enum SectionName {
+  HEADER = "header",
+  CONTENT = "content",
+  FOOTER = "footer",
+}
+
+export type PersonalityDataType = {
+  header: SectionType;
+  content: SectionType;
+  footer: SectionType;
+};
+
+export type SectionType = {
+  columnsCount: number;
+  items: SectionItemType[];
+};
+
+export type SectionItemType = {
+  id: string;
+  backgroundColor: string;
+  backgroundImage?: string;
+  texts: TextType[];
+  buttons: ButtonType[];
+  images: ImageType[];
+  alignment?: HorizontalAlignment;
+  verticalAlignment?: VerticalAlignment;
+  style?: {
+    borderRadius?: number;
+    padding?: string;
+    fontFamily?: string;
+    backgroundSize?: string;
+    backgroundRepeat?: string;
+    backgroundPosition?: string;
+  };
+};
+
+export type TextType = {
+  id: string;
+  text: string;
+  fontSize?: number;
+  fontFamily?: string;
+  color?: string;
+  alignment?: HorizontalAlignment;
+  verticalAlignment?: VerticalAlignment;
+};
+
+export type ButtonType = {
+  id: string;
+  text: string;
+  link: string;
+  size: ButtonSize;
+  isBorder: boolean;
+  borderSize: number;
+  textColor: string;
+  backgroundColor: string;
+  borderColor: string;
+  alignment?: HorizontalAlignment;
+  verticalAlignment?: VerticalAlignment;
+};
+
+export type ImageType = {
+  id: string;
+  src: string;
+  alt?: string;
+  size: ImageSize;
+  width?: string;
+  height?: string;
+  alignment?: HorizontalAlignment;
+  verticalAlignment?: VerticalAlignment;
+};

src/modules/templates/repositories/template.repository.ts

@@ -0,0 +1,32 @@
+import { EntityRepository, FilterQuery } from "@mikro-orm/postgresql";
+
+import { PaginationUtils } from "../../utils/services/pagination.utils";
+import { TemplateQueryDto } from "../DTO/template-query.dto";
+import { Template } from "../entities/template.entity";
+
+export class TemplateRepository extends EntityRepository<Template> {
+  async findAllTemplates(queryDto: TemplateQueryDto, businessId: string) {
+    const { limit, skip } = PaginationUtils(queryDto);
+
+    const query: FilterQuery<Template> = {
+      deletedAt: null,
+      business: {
+        id: businessId,
+      },
+    };
+
+    if (queryDto.search) {
+      query.name = { $ilike: `%${queryDto.search}%` };
+    }
+
+    return this.findAndCount(query, { limit, offset: skip, populate: ["business"], exclude: ["rawHtml", "structure"] });
+  }
+
+  //**************************************************** */
+  async findTemplateById(id: string, businessId: string) {
+    const template = await this.findOne({ id, business: { id: businessId }, deletedAt: null }, { populate: ["business"] });
+
+    return template;
+  }
+  //**************************************************** */
+}

src/modules/templates/services/template-processor.service.ts

@@ -0,0 +1,177 @@
+import { Injectable, Logger } from "@nestjs/common";
+
+import { TemplatesService } from "./templates.service";
+// import { PersonalityDataType, SectionItemType, TextType } from "../interfaces/structure.interface";
+
+interface ProcessedTemplateResult {
+  html: string;
+  text: string;
+  hasTemplate: boolean;
+}
+
+@Injectable()
+export class TemplateProcessorService {
+  private readonly logger = new Logger(TemplateProcessorService.name);
+
+  constructor(private readonly templatesService: TemplatesService) {}
+
+  /**
+   * Process email content through business template
+   */
+  async processEmailWithTemplate(
+    businessId: string,
+    emailContent: { text?: string; html?: string; subject?: string },
+    // userId?: string,
+  ): Promise<ProcessedTemplateResult> {
+    try {
+      this.logger.log(`Processing email with template for business: ${businessId}`);
+
+      // Get business templates
+      const templates = await this.templatesService.getTemplatesByBusinessId(businessId);
+
+      if (!templates || templates.length === 0) {
+        this.logger.log(`No templates found for business: ${businessId}, using original content`);
+        return {
+          html: emailContent.html || this.convertTextToHtml(emailContent.text || ""),
+          text: emailContent.text || this.stripHtmlTags(emailContent.html || ""),
+          hasTemplate: false,
+        };
+      }
+
+      // Use the first template
+      const template = templates[0];
+
+      this.logger.log(`Using template: ${template.name} for email processing`);
+
+      // Process the template with email content
+      const processedContent = await this.injectContentIntoTemplate(emailContent, template.rawHtml);
+
+      return {
+        html: processedContent.html,
+        text: processedContent.text,
+        hasTemplate: true,
+      };
+    } catch (error) {
+      this.logger.error(`Failed to process email with template for business ${businessId}:`, error);
+
+      // Fallback to original content if template processing fails
+      return {
+        html: emailContent.html || this.convertTextToHtml(emailContent.text || ""),
+        text: emailContent.text || this.stripHtmlTags(emailContent.html || ""),
+        hasTemplate: false,
+      };
+    }
+  }
+
+  /**
+   * Inject email content into template structure
+   */
+  private async injectContentIntoTemplate(
+    // templateStructure: Record<string, unknown>,
+    emailContent: { text?: string; html?: string; subject?: string },
+    rawHtml?: string,
+  ): Promise<{ html: string; text: string }> {
+    try {
+      // If template has raw HTML, use it as base and inject content
+      if (rawHtml) {
+        const html = this.injectContentIntoRawHtml(rawHtml, emailContent);
+        return {
+          html,
+          text: this.stripHtmlTags(html),
+        };
+      }
+
+      // Otherwise, build simple HTML with email content
+      const html = this.buildSimpleTemplate(emailContent);
+      return {
+        html,
+        text: this.stripHtmlTags(html),
+      };
+    } catch (error) {
+      this.logger.error("Failed to inject content into template:", error);
+      throw error;
+    }
+  }
+
+  /**
+   * Inject email content into raw HTML template
+   */
+  private injectContentIntoRawHtml(rawHtml: string, emailContent: { text?: string; html?: string; subject?: string }): string {
+    let processedHtml = rawHtml;
+
+    // Replace placeholders with actual content
+    const contentToInject = emailContent.html || this.convertTextToHtml(emailContent.text || "");
+
+    // Common placeholder patterns
+    const placeholders = [/\{\{content\}\}/gi, /\{\{message\}\}/gi, /\{\{body\}\}/gi, /\{content\}/gi, /\{message\}/gi, /\{body\}/gi];
+
+    placeholders.forEach((placeholder) => {
+      processedHtml = processedHtml.replace(placeholder, contentToInject);
+    });
+
+    // Replace subject placeholders
+    if (emailContent.subject) {
+      const subjectPlaceholders = [/\{\{subject\}\}/gi, /\{\{title\}\}/gi, /\{subject\}/gi, /\{title\}/gi];
+
+      subjectPlaceholders.forEach((placeholder) => {
+        processedHtml = processedHtml.replace(placeholder, emailContent.subject!);
+      });
+    }
+
+    return processedHtml;
+  }
+
+  /**
+   * Build simple HTML template
+   */
+  private buildSimpleTemplate(emailContent: { text?: string; html?: string; subject?: string }): string {
+    const content = emailContent.html || this.convertTextToHtml(emailContent.text || "");
+
+    return `
+      <!DOCTYPE html>
+      <html>
+      <head>
+        <meta charset="utf-8">
+        <meta name="viewport" content="width=device-width, initial-scale=1.0">
+        <title>${emailContent.subject || "Email"}</title>
+        <style>
+          body { font-family: Arial, sans-serif; margin: 0; padding: 20px; line-height: 1.6; }
+          .email-container { max-width: 600px; margin: 0 auto; }
+          .content { padding: 20px; }
+        </style>
+      </head>
+      <body>
+        <div class="email-container">
+          <div class="content">
+            ${content}
+          </div>
+        </div>
+      </body>
+      </html>
+    `;
+  }
+
+  /**
+   * Convert plain text to HTML
+   */
+  private convertTextToHtml(text: string): string {
+    return text
+      .replace(/\n\n/g, "</p><p>")
+      .replace(/\n/g, "<br>")
+      .replace(/^(.*)$/, "<p>$1</p>");
+  }
+
+  /**
+   * Strip HTML tags from content
+   */
+  private stripHtmlTags(html: string): string {
+    return html
+      .replace(/<[^>]*>/g, "")
+      .replace(/&nbsp;/g, " ")
+      .replace(/&amp;/g, "&")
+      .replace(/&lt;/g, "<")
+      .replace(/&gt;/g, ">")
+      .replace(/&quot;/g, '"')
+      .trim();
+  }
+}

src/modules/templates/services/templates.service.ts

@@ -0,0 +1,131 @@
+import { EntityManager } from "@mikro-orm/postgresql";
+import { BadRequestException, Injectable } from "@nestjs/common";
+import dayjs from "dayjs";
+import { v7 as uuidv7 } from "uuid";
+
+import { TemplateMessage } from "../../../common/enums/message.enum";
+import { BusinessRepository } from "../../businesses/repositories/business.repository";
+import { CreateTemplateDto } from "../DTO/create-template.dto";
+import { TemplateQueryDto } from "../DTO/template-query.dto";
+import { UpdateTemplateDto } from "../DTO/update-template.dto";
+import { TemplateRepository } from "../repositories/template.repository";
+
+@Injectable()
+export class TemplatesService {
+  constructor(
+    private readonly templateRepository: TemplateRepository,
+    private readonly businessRepository: BusinessRepository,
+    private readonly em: EntityManager,
+  ) {}
+
+  async createTemplate(createTemplateDto: CreateTemplateDto, businessId: string) {
+    const business = await this.businessRepository.findOne({
+      id: businessId,
+      deletedAt: null,
+    });
+    if (!business) throw new BadRequestException(TemplateMessage.TEMPLATE_BUSINESS_NOT_FOUND);
+
+    const template = this.templateRepository.create({
+      name: createTemplateDto.name,
+      structure: createTemplateDto.structure,
+      rawHtml: createTemplateDto.rawHtml,
+      currentVersion: uuidv7(),
+      business,
+    });
+
+    await this.em.persistAndFlush(template);
+
+    return {
+      message: TemplateMessage.TEMPLATE_CREATED_SUCCESSFULLY,
+      template,
+    };
+  }
+
+  //**************************************************** */
+  async findAllTemplates(queryDto: TemplateQueryDto, businessId: string) {
+    const [templates, count] = await this.templateRepository.findAllTemplates(queryDto, businessId);
+
+    return {
+      templates,
+      count,
+      pagination: true,
+    };
+  }
+
+  //**************************************************** */
+  async findTemplateById(id: string, businessId: string) {
+    const template = await this.templateRepository.findTemplateById(id, businessId);
+
+    if (!template) throw new BadRequestException(TemplateMessage.TEMPLATE_NOT_FOUND);
+
+    return {
+      template,
+    };
+  }
+
+  //**************************************************** */
+  async updateTemplate(id: string, updateTemplateDto: UpdateTemplateDto, businessId: string) {
+    const template = await this.templateRepository.findTemplateById(id, businessId);
+
+    if (!template) throw new BadRequestException(TemplateMessage.TEMPLATE_NOT_FOUND);
+
+    this.templateRepository.assign(template, updateTemplateDto);
+
+    if (updateTemplateDto.structure) {
+      template.currentVersion = uuidv7();
+    }
+
+    await this.em.flush();
+
+    return {
+      message: TemplateMessage.TEMPLATE_UPDATED_SUCCESSFULLY,
+      template,
+    };
+  }
+
+  //**************************************************** */
+  async deleteTemplate(id: string, businessId: string) {
+    const template = await this.templateRepository.findTemplateById(id, businessId);
+
+    if (!template) throw new BadRequestException(TemplateMessage.TEMPLATE_NOT_FOUND);
+
+    template.deletedAt = dayjs().toDate();
+    await this.em.flush();
+
+    return {
+      message: TemplateMessage.TEMPLATE_DELETED_SUCCESSFULLY,
+    };
+  }
+
+  //**************************************************** */
+  async getTemplatesByBusinessId(businessId: string) {
+    return this.templateRepository.find(
+      {
+        business: { id: businessId },
+        deletedAt: null,
+      },
+      {
+        populate: ["business"],
+      },
+    );
+  }
+
+  //**************************************************** */
+  async setSelectedTemplate(id: string, businessId: string) {
+    const template = await this.templateRepository.findTemplateById(id, businessId);
+
+    if (!template) throw new BadRequestException(TemplateMessage.TEMPLATE_NOT_FOUND);
+
+    // First, unselect all templates for this business
+    await this.templateRepository.nativeUpdate({ business: { id: businessId }, deletedAt: null }, { selected: false });
+
+    // Then select the specified template
+    template.selected = true;
+    await this.em.flush();
+
+    return {
+      message: TemplateMessage.TEMPLATE_SELECTED_SUCCESSFULLY,
+      template,
+    };
+  }
+}

src/modules/templates/templates.controller.ts

@@ -0,0 +1,67 @@
+import { Body, Controller, Delete, Get, Param, Patch, Post, Query, UseInterceptors } from "@nestjs/common";
+import { ApiHeader, ApiOperation, ApiResponse } from "@nestjs/swagger";
+
+import { CreateTemplateDto } from "./DTO/create-template.dto";
+import { TemplateParamDto } from "./DTO/template-param.dto";
+import { TemplateQueryDto } from "./DTO/template-query.dto";
+import { UpdateTemplateDto } from "./DTO/update-template.dto";
+import { TemplatesService } from "./services/templates.service";
+import { AuthGuards } from "../../common/decorators/auth-guard.decorator";
+import { BusinessDec } from "../../common/decorators/business.decorator";
+import { BusinessInterceptor } from "../../core/interceptors/business.interceptor";
+
+@Controller("templates")
+@ApiHeader({ name: "x-business-id", description: "Business ID" })
+@UseInterceptors(BusinessInterceptor)
+@AuthGuards()
+export class TemplatesController {
+  constructor(private readonly templatesService: TemplatesService) {}
+
+  @Post()
+  @ApiOperation({ summary: "Create a new template" })
+  @ApiResponse({ status: 201, description: "Template created successfully" })
+  @ApiResponse({ status: 400, description: "Bad request - invalid data" })
+  @ApiResponse({ status: 404, description: "Business not found" })
+  createTemplate(@Body() createTemplateDto: CreateTemplateDto, @BusinessDec("id") businessId: string) {
+    return this.templatesService.createTemplate(createTemplateDto, businessId);
+  }
+
+  @Get()
+  @ApiOperation({ summary: "Get all templates for business" })
+  @ApiResponse({ status: 200, description: "Templates retrieved successfully" })
+  findAllTemplates(@Query() queryDto: TemplateQueryDto, @BusinessDec("id") businessId: string) {
+    return this.templatesService.findAllTemplates(queryDto, businessId);
+  }
+
+  @Get(":id")
+  @ApiOperation({ summary: "Get template by ID" })
+  @ApiResponse({ status: 200, description: "Template retrieved successfully" })
+  @ApiResponse({ status: 404, description: "Template not found" })
+  findTemplateById(@Param() params: TemplateParamDto, @BusinessDec("id") businessId: string) {
+    return this.templatesService.findTemplateById(params.id, businessId);
+  }
+
+  @Patch(":id")
+  @ApiOperation({ summary: "Update template by ID" })
+  @ApiResponse({ status: 200, description: "Template updated successfully" })
+  @ApiResponse({ status: 404, description: "Template not found" })
+  updateTemplate(@Param() params: TemplateParamDto, @Body() updateTemplateDto: UpdateTemplateDto, @BusinessDec("id") businessId: string) {
+    return this.templatesService.updateTemplate(params.id, updateTemplateDto, businessId);
+  }
+
+  @Delete(":id")
+  @ApiOperation({ summary: "Delete template by ID" })
+  @ApiResponse({ status: 200, description: "Template deleted successfully" })
+  @ApiResponse({ status: 404, description: "Template not found" })
+  deleteTemplate(@Param() params: TemplateParamDto, @BusinessDec("id") businessId: string) {
+    return this.templatesService.deleteTemplate(params.id, businessId);
+  }
+
+  @Post(":id/set-selected")
+  @ApiOperation({ summary: "Set template as selected (unselects all other templates for the business)" })
+  @ApiResponse({ status: 200, description: "Template set as selected successfully" })
+  @ApiResponse({ status: 404, description: "Template not found" })
+  setSelectedTemplate(@Param() params: TemplateParamDto, @BusinessDec("id") businessId: string) {
+    return this.templatesService.setSelectedTemplate(params.id, businessId);
+  }
+}

src/modules/templates/templates.module.ts

@@ -0,0 +1,17 @@
+import { MikroOrmModule } from "@mikro-orm/nestjs";
+import { Module } from "@nestjs/common";
+
+import { Template } from "./entities/template.entity";
+import { TemplateProcessorService } from "./services/template-processor.service";
+import { TemplatesService } from "./services/templates.service";
+import { TemplatesController } from "./templates.controller";
+import { BusinessesModule } from "../businesses/businesses.module";
+import { Business } from "../businesses/entities/business.entity";
+
+@Module({
+  imports: [MikroOrmModule.forFeature([Template, Business]), BusinessesModule],
+  providers: [TemplatesService, TemplateProcessorService],
+  controllers: [TemplatesController],
+  exports: [TemplatesService, TemplateProcessorService],
+})
+export class TemplatesModule {}

src/modules/users/entities/user.entity.ts

@@ -5,6 +5,7 @@ import { Role } from "./role.entity";
 import { BaseEntity } from "../../../common/entities/base.entity";
 import { Business } from "../../businesses/entities/business.entity";
 import { Domain } from "../../domains/entities/domain.entity";
+import { Template } from "../../templates/entities/template.entity";
 import { UserRepository } from "../repositories/user.repository";
 
 @Entity({ repository: () => UserRepository })
@@ -52,11 +53,14 @@ export class User extends BaseEntity {
   @ManyToOne(() => Role, { deleteRule: "restrict" })
   role!: Role;
 
-  @ManyToOne(() => Business, { deleteRule: "restrict" })
+  @ManyToOne(() => Business, { deleteRule: "cascade" })
   business!: Business;
 
   @ManyToOne(() => Domain, { deleteRule: "restrict" })
   domain!: Domain;
 
+  @ManyToOne(() => Template, { deleteRule: "restrict", nullable: true })
+  template?: Template;
+
   [EntityRepositoryType]?: UserRepository;
 }