/** * Email Template Service * Manages email templates for campaigns and transactional emails */ export interface EmailTemplate { id: string; name: string; subject: string; htmlContent: string; textContent?: string; variables: string[]; category: 'campaign' | 'transactional' | 'promotional'; createdAt: Date; updatedAt: Date; } /** * Default email templates */ export const DEFAULT_TEMPLATES: Record = { // Campaign templates welcome_campaign: { id: 'welcome_campaign', name: 'Welcome Campaign', subject: 'Welcome to CoinKrazy! 🎰', htmlContent: `

Welcome to CoinKrazy!

Hi {{firstName}},

We're thrilled to have you join our community of players. Get ready for an exciting gaming experience with:

Start Playing Now

Best regards,
The CoinKrazy Team

`, variables: ['firstName', 'loginUrl'], category: 'campaign', createdAt: new Date(), updatedAt: new Date(), }, // Promotional template promotional_offer: { id: 'promotional_offer', name: 'Promotional Offer', subject: '🎁 Special Offer Just for You!', htmlContent: `

{{offerTitle}}

Hi {{firstName}},

{{offerDescription}}

{{offerAmount}}

Use code: {{promoCode}}

Claim Offer

Offer expires on {{expiryDate}}

`, variables: ['firstName', 'offerTitle', 'offerDescription', 'offerAmount', 'promoCode', 'claimUrl', 'expiryDate'], category: 'promotional', createdAt: new Date(), updatedAt: new Date(), }, // Transactional templates password_reset: { id: 'password_reset', name: 'Password Reset', subject: 'Reset Your CoinKrazy Password', htmlContent: `

Password Reset Request

Hi {{firstName}},

We received a request to reset your password. Click the link below to create a new password:

Reset Password

This link expires in 24 hours.

If you didn't request this, please ignore this email.

`, variables: ['firstName', 'resetLink'], category: 'transactional', createdAt: new Date(), updatedAt: new Date(), }, email_verification: { id: 'email_verification', name: 'Email Verification', subject: 'Verify Your CoinKrazy Email', htmlContent: `

Email Verification

Hi {{firstName}},

Please verify your email address to complete your CoinKrazy account setup:

Verify Email

Or copy this code: {{verificationCode}}

`, variables: ['firstName', 'verificationLink', 'verificationCode'], category: 'transactional', createdAt: new Date(), updatedAt: new Date(), }, // Engagement template re_engagement: { id: 're_engagement', name: 'Re-engagement Campaign', subject: 'We Miss You! Come Back and Claim Your Bonus 🎁', htmlContent: `

We Miss You, {{firstName}}!

It's been a while since we've seen you at CoinKrazy. We'd love to have you back!

Welcome Back Bonus

{{bonusAmount}} in free credits waiting for you!

Log In Now

Offer valid until {{expiryDate}}

`, variables: ['firstName', 'bonusAmount', 'loginUrl', 'expiryDate'], category: 'promotional', createdAt: new Date(), updatedAt: new Date(), }, }; /** * Get template by ID */ export function getTemplate(templateId: string): EmailTemplate | undefined { return DEFAULT_TEMPLATES[templateId]; } /** * Render template with variables */ export function renderTemplate( template: EmailTemplate, variables: Record ): { subject: string; htmlContent: string } { let subject = template.subject; let htmlContent = template.htmlContent; // Replace all variables in subject and content Object.entries(variables).forEach(([key, value]) => { const placeholder = `{{${key}}}`; subject = subject.replace(new RegExp(placeholder, 'g'), value); htmlContent = htmlContent.replace(new RegExp(placeholder, 'g'), value); }); return { subject, htmlContent }; } /** * Validate template variables */ export function validateTemplateVariables( template: EmailTemplate, variables: Record ): { valid: boolean; missing: string[] } { const missing = template.variables.filter((v) => !variables[v]); return { valid: missing.length === 0, missing, }; } /** * Get all templates */ export function getAllTemplates(): EmailTemplate[] { return Object.values(DEFAULT_TEMPLATES); } /** * Get templates by category */ export function getTemplatesByCategory( category: 'campaign' | 'transactional' | 'promotional' ): EmailTemplate[] { return Object.values(DEFAULT_TEMPLATES).filter((t) => t.category === category); }