package notifications import ( "fmt" "time" "bookra/apps/backend/internal/db" ) type EmailType string const ( EmailTypeConfirmation EmailType = "confirmation" EmailTypeReminder EmailType = "reminder" EmailTypeReschedule EmailType = "reschedule" EmailTypeCancellation EmailType = "cancellation" EmailTypeBusinessNotify EmailType = "business_notify" EmailTypeUsageWarning EmailType = "usage_warning" EmailTypeTrialEnding EmailType = "trial_ending" ) type BookingEmailData struct { Type EmailType TenantName string TenantSlug string BusinessEmail string BusinessPhone string BusinessAddress string BrandColor string CustomerName string CustomerEmail string Service string Location string Reference string StartsAt time.Time EndsAt time.Time Timezone string Locale string Notes string ManagementURL string AddToCalendarURL string } type UsageNotificationData struct { Type EmailType TenantName string TenantSlug string BusinessEmail string BrandColor string AdminEmail string Locale string PlanCode string LocationCount int LocationLimit int UsagePercent int UpgradeURL string DashboardURL string } func RenderUsageNotificationEmail(data UsageNotificationData) EmailMessage { subject := renderUsageSubject(data) htmlBody := renderUsageHTML(data) textBody := renderUsageText(data) return EmailMessage{ From: data.BusinessEmail, To: data.AdminEmail, Subject: subject, Text: textBody, HTML: htmlBody, } } func renderUsageSubject(data UsageNotificationData) string { if data.Locale == "cs" { switch data.Type { case EmailTypeUsageWarning: return "⚠️ Blížíte se limitu lokací - Upgrade na vyšší plán" case EmailTypeTrialEnding: return "⏰ Vaše zkušební období končí - Pokračujte s Bookra" } } switch data.Type { case EmailTypeUsageWarning: return "⚠️ You're nearing your location limit - Upgrade your plan" case EmailTypeTrialEnding: return "⏰ Your trial period is ending - Continue with Bookra" } return "Bookra notification" } func renderUsageHTML(data UsageNotificationData) string { cs := data.Locale == "cs" upgradeBtn := `` + map[bool]string{true: "Upgradeovat", false: "Upgrade"}[cs] + `` dashboardBtn := `` + map[bool]string{true: "Otevřít dashboard", false: "Open dashboard"}[cs] + `` if data.Type == EmailTypeUsageWarning { var msg string if cs { msg = fmt.Sprintf("Váš plán %s umožňuje pouze %d lokací. Aktuálně používáte %d (%d%%).", data.PlanCode, data.LocationLimit, data.LocationCount, data.UsagePercent) } else { msg = fmt.Sprintf("Your %s plan allows only %d locations. You're currently using %d (%d%%).", data.PlanCode, data.LocationLimit, data.LocationCount, data.UsagePercent) } return `
📍

` + map[bool]string{true: "Blížíte se limitu lokací", false: "You're nearing your location limit"}[cs] + `

` + msg + `

` + upgradeBtn + `

` + map[bool]string{true: "Přidejte další lokace s vyšším plánem", false: "Add more locations with a higher plan"}[cs] + `

Powered by Bookra

` } // Trial ending email return `
🎉

` + map[bool]string{true: "Děkujeme, že používáte Bookra!", false: "Thank you for using Bookra!"}[cs] + `

` + map[bool]string{true: "Vaše zkušební období brzy končí. Pokud se vám naše služba líbí, můžete pokračovat s vybraným plánem.", false: "Your trial period is ending soon. If you like our service, you can continue with your chosen plan."}[cs] + `

` + upgradeBtn + `

` + map[bool]string{true: "Pokud se vám služba nelíbí, můžete ji kdykoliv zrušit. Nechceme vám brát peníze, pokud nejste spokojeni.", false: "If you don't like our service, you can cancel anytime. We don't want to take your money if you're not happy."}[cs] + `

` + map[bool]string{true: "Zrušit můžete zde:", false: "Cancel here:"}[cs] + ` ` + dashboardBtn + `

Powered by Bookra

` } func renderUsageText(data UsageNotificationData) string { cs := data.Locale == "cs" if data.Type == EmailTypeUsageWarning { if cs { return fmt.Sprintf("Blížíte se limitu lokací! Váš plán %s umožňuje pouze %d lokací. Aktuálně používáte %d (%d%%). Upgradeujte na vyšší plán: %s", data.PlanCode, data.LocationLimit, data.LocationCount, data.UsagePercent, data.UpgradeURL) } return fmt.Sprintf("You're nearing your location limit! Your %s plan allows only %d locations. You're currently using %d (%d%%). Upgrade: %s", data.PlanCode, data.LocationLimit, data.LocationCount, data.UsagePercent, data.UpgradeURL) } if cs { return "Vaše zkušební období končí. Pokud se vám služba líbí, můžete pokračovat. Pokud ne, můžete zrušit. Nechceme vám brát peníze, pokud nejste spokojeni. Dashboard: " + data.DashboardURL } return "Your trial period is ending. If you like our service, you can continue. If not, you can cancel - we don't want your money if you're not happy. Dashboard: " + data.DashboardURL } func RenderEmailMessage(data BookingEmailData) EmailMessage { subject := renderSubject(data) htmlBody := renderHTMLBody(data) textBody := renderTextBody(data) return EmailMessage{ From: data.BusinessEmail, To: data.CustomerEmail, Subject: subject, Text: textBody, HTML: htmlBody, } } func renderSubject(data BookingEmailData) string { localizedTime := formatLocalizedTime(data.StartsAt, data.Timezone, data.Locale) switch data.Type { case EmailTypeConfirmation: if data.Locale == "cs" { return fmt.Sprintf("Potvrzení rezervace %s - %s", data.Reference, data.TenantName) } return fmt.Sprintf("Booking Confirmation %s - %s", data.Reference, data.TenantName) case EmailTypeReminder: if data.Locale == "cs" { return fmt.Sprintf("Připomínka: Máte rezervaci zítra v %s", localizedTime) } return fmt.Sprintf("Reminder: You have a booking tomorrow at %s", localizedTime) case EmailTypeReschedule: if data.Locale == "cs" { return fmt.Sprintf("Vaše rezervace byla přesunuta - %s", data.Reference) } return fmt.Sprintf("Your booking has been rescheduled - %s", data.Reference) case EmailTypeCancellation: if data.Locale == "cs" { return fmt.Sprintf("Vaše rezervace byla zrušena - %s", data.Reference) } return fmt.Sprintf("Your booking has been cancelled - %s", data.Reference) case EmailTypeBusinessNotify: if data.Locale == "cs" { return fmt.Sprintf("Nová rezervace od %s - %s", data.CustomerName, data.Reference) } return fmt.Sprintf("New booking from %s - %s", data.CustomerName, data.Reference) default: return "Booking Update" } } func renderTextBody(data BookingEmailData) string { localizedTime := formatLocalizedDateTime(data.StartsAt, data.Timezone, data.Locale) switch data.Type { case EmailTypeConfirmation: if data.Locale == "cs" { return fmt.Sprintf(`Dobrý den %s, vaše rezervace byla potvrzena. Detaily rezervace: - Služba: %s - Datum a čas: %s - Místo: %s - Reference: %s Pro správu rezervace navštivte: %s Děkujeme, %s %s`, data.CustomerName, data.Service, localizedTime, data.Location, data.Reference, data.ManagementURL, data.TenantName, data.BusinessEmail) } return fmt.Sprintf(`Hello %s, Your booking has been confirmed. Booking Details: - Service: %s - Date & Time: %s - Location: %s - Reference: %s Manage your booking at: %s Thank you, %s %s`, data.CustomerName, data.Service, localizedTime, data.Location, data.Reference, data.ManagementURL, data.TenantName, data.BusinessEmail) case EmailTypeReminder: if data.Locale == "cs" { return fmt.Sprintf(`Dobrý den %s, připomínáme vám zítřejší rezervaci. - Služba: %s - Čas: %s - Místo: %s - Reference: %s Pro správu rezervace: %s %s`, data.CustomerName, data.Service, localizedTime, data.Location, data.Reference, data.ManagementURL, data.TenantName) } return fmt.Sprintf(`Hello %s, This is a reminder for your booking tomorrow. - Service: %s - Time: %s - Location: %s - Reference: %s Manage booking: %s %s`, data.CustomerName, data.Service, localizedTime, data.Location, data.Reference, data.ManagementURL, data.TenantName) case EmailTypeReschedule: if data.Locale == "cs" { return fmt.Sprintf(`Dobrý den %s, vaše rezervace byla přesunuta na nový termín. Nové detaily: - Služba: %s - Datum a čas: %s - Místo: %s - Reference: %s Pro správu rezervace: %s %s`, data.CustomerName, data.Service, localizedTime, data.Location, data.Reference, data.ManagementURL, data.TenantName) } return fmt.Sprintf(`Hello %s, Your booking has been rescheduled. New details: - Service: %s - Date & Time: %s - Location: %s - Reference: %s Manage booking: %s %s`, data.CustomerName, data.Service, localizedTime, data.Location, data.Reference, data.ManagementURL, data.TenantName) case EmailTypeCancellation: if data.Locale == "cs" { return fmt.Sprintf(`Dobrý den %s, vaše rezervace byla zrušena. Zrušená rezervace: - Služba: %s - Datum a čas: %s - Reference: %s Pokud jste rezervaci nezrušili vy, kontaktujte nás: %s %s`, data.CustomerName, data.Service, localizedTime, data.Reference, data.BusinessEmail, data.TenantName) } return fmt.Sprintf(`Hello %s, Your booking has been cancelled. Cancelled booking: - Service: %s - Date & Time: %s - Reference: %s If you didn't cancel this, please contact us: %s %s`, data.CustomerName, data.Service, localizedTime, data.Reference, data.BusinessEmail, data.TenantName) case EmailTypeBusinessNotify: if data.Locale == "cs" { return fmt.Sprintf(`Nová rezervace od %s Detaily: - Služba: %s - Datum a čas: %s - Reference: %s - Email: %s Spravovat v administraci: https://bookra.eu/dashboard`, data.CustomerName, data.Service, localizedTime, data.Reference, data.CustomerEmail) } return fmt.Sprintf(`New booking from %s Details: - Service: %s - Date & Time: %s - Reference: %s - Email: %s Manage in dashboard: https://bookra.eu/dashboard`, data.CustomerName, data.Service, localizedTime, data.Reference, data.CustomerEmail) default: return "Booking update" } } func renderHTMLBody(data BookingEmailData) string { // For now, return simple HTML version. In production, this would use proper HTML templates textBody := renderTextBody(data) // Simple conversion: wrap paragraphs in

tags and preserve line breaks html := "" html += "

" html += fmt.Sprintf("

%s

", data.BrandColor, data.TenantName) // Convert text to simple HTML paragraphs := splitParagraphs(textBody) for _, p := range paragraphs { if len(p) > 0 { html += fmt.Sprintf("

%s

", p) } } // Add management button if data.ManagementURL != "" { html += fmt.Sprintf("
Manage Booking
", data.ManagementURL, data.BrandColor) } html += "
" return html } func formatLocalizedTime(t time.Time, timezone, locale string) string { loc, err := time.LoadLocation(timezone) if err != nil { loc = time.UTC } localTime := t.In(loc) if locale == "cs" { return localTime.Format("15:04") } return localTime.Format("3:04 PM") } func formatLocalizedDateTime(t time.Time, timezone, locale string) string { loc, err := time.LoadLocation(timezone) if err != nil { loc = time.UTC } localTime := t.In(loc) if locale == "cs" { return localTime.Format("02.01.2006 15:04") } return localTime.Format("Jan 02, 2006 3:04 PM") } func splitParagraphs(text string) []string { var paragraphs []string current := "" for _, line := range splitLines(text) { trimmed := trimSpace(line) if trimmed == "" { if current != "" { paragraphs = append(paragraphs, current) current = "" } } else { if current != "" { current += " " } current += trimmed } } if current != "" { paragraphs = append(paragraphs, current) } return paragraphs } func splitLines(s string) []string { var lines []string start := 0 for i := 0; i < len(s); i++ { if s[i] == '\n' { lines = append(lines, s[start:i]) start = i + 1 } } lines = append(lines, s[start:]) return lines } func trimSpace(s string) string { start := 0 end := len(s) for start < end && (s[start] == ' ' || s[start] == '\t' || s[start] == '\r' || s[start] == '\n') { start++ } for end > start && (s[end-1] == ' ' || s[end-1] == '\t' || s[end-1] == '\r' || s[end-1] == '\n') { end-- } return s[start:end] } // RenderReminderEmail renders the legacy reminder email from a job record func RenderReminderEmail(from string, job db.ReminderJobRecord) EmailMessage { data := BookingEmailData{ Type: EmailTypeReminder, TenantName: job.TenantName, TenantSlug: "", // Not available in job record CustomerName: job.CustomerName, CustomerEmail: job.CustomerEmail, Reference: job.Reference, StartsAt: job.StartsAt, Timezone: job.Timezone, Locale: job.Locale, Service: "Service", // Legacy Location: "Location", // Legacy } return RenderEmailMessage(data) } // ============================================ // SMS USAGE EMAIL TEMPLATE // ============================================ type SMSUsageEmailData struct { TenantName string TenantSlug string BusinessEmail string YearMonth string MessageCount int TotalCostCents int Locale string } func RenderSMSUsageEmail(data SMSUsageEmailData) EmailMessage { cs := data.Locale == "cs" year := data.YearMonth[:4] month := data.YearMonth[5:] monthLabel := month + "/" + year if cs { monthLabel = month + "." + year } totalFormatted := fmt.Sprintf("%.2f Kč", float64(data.TotalCostCents)/100.0) subject := fmt.Sprintf("Bookra SMS Usage - %s (%s)", monthLabel, totalFormatted) if cs { subject = fmt.Sprintf("Bookra SMS Přehled - %s (%s)", monthLabel, totalFormatted) } textBody := fmt.Sprintf( "SMS Usage Summary for %s\n\nPeriod: %s\nMessages sent: %d\nTotal cost: %s\n\nThis amount will be added to your next invoice.", data.TenantName, monthLabel, data.MessageCount, totalFormatted, ) if cs { textBody = fmt.Sprintf( "Přehled SMS pro %s\n\nObdobí: %s\nOdeslaných zpráv: %d\nCelková cena: %s\n\nTato částka bude přidána k vaší další faktuře.", data.TenantName, monthLabel, data.MessageCount, totalFormatted, ) } htmlBody := fmt.Sprintf(`
📱

%s

%s

%s %s
%s %d
%s %s

%s

Powered by Bookra

`, ifCS(cs, "SMS Usage Summary", "Přehled SMS využití"), fmt.Sprintf(ifCS(cs, "Your SMS usage for %s", "Vaše SMS využití za %s"), data.TenantName), ifCS(cs, "Period", "Období"), monthLabel, ifCS(cs, "Messages sent", "Odeslaných zpráv"), data.MessageCount, ifCS(cs, "Total cost (excl. VAT)", "Celková cena (bez DPH)"), totalFormatted, ifCS(cs, "This amount will be added to your next Stripe invoice.", "Tato částka bude přidána k vaší další faktuře Stripe."), ) return EmailMessage{ From: "", To: data.BusinessEmail, Subject: subject, Text: textBody, HTML: htmlBody, } } func ifCS(cs bool, en, csText string) string { if cs { return csText } return en }