Attempt to guess first name for welcome email

pkg/common/constants.go

@@ -5,6 +5,7 @@ import "net/http"
 const (
 	DefaultOrgName        = "My Organization"
 	PrivateCaptcha        = "Private Captcha"
+	PrivateCaptchaTeam    = "Private Captcha Team"
 	StageDev              = "dev"
 	StageStaging          = "staging"
 	StageTest             = "test"

pkg/common/utils.go

@@ -9,6 +9,7 @@ import (
 	"net/url"
 	"strings"
 	"time"
+	"unicode"
 
 	"github.com/jpillora/backoff"
 )
@@ -98,6 +99,52 @@ func ParseBoolean(value string) bool {
 	}
 }
 
+func containsAlphabetic(s string) bool {
+	for _, r := range s {
+		if unicode.IsLetter(r) {
+			return true
+		}
+	}
+	return false
+}
+
+func onlyAlphabetic(s string) bool {
+	for _, r := range s {
+		if !unicode.IsLetter(r) {
+			return false
+		}
+	}
+	return true
+}
+
+func isLowerCase(s string) bool {
+	for _, r := range s {
+		if !unicode.IsLower(r) {
+			return false
+		}
+	}
+
+	return true
+}
+
+func GuessFirstName(username string) string {
+	parts := strings.Fields(username)
+
+	for _, p := range parts {
+		if containsAlphabetic(p) {
+			if onlyAlphabetic(p) && isLowerCase(p) {
+				runes := []rune(p)
+				runes[0] = unicode.ToUpper(runes[0])
+				return string(runes)
+			}
+
+			return p
+		}
+	}
+
+	return username
+}
+
 func ChunkedCleanup(ctx context.Context, minInterval, maxInterval time.Duration, defaultChunkSize int, deleter func(context.Context, time.Time, int) int) {
 	b := &backoff.Backoff{
 		Min:    minInterval,

pkg/common/utils_test.go

@@ -123,3 +123,29 @@ func TestSubDomain(t *testing.T) {
 		})
 	}
 }
+
+func TestGuessFirstName(t *testing.T) {
+	tests := []struct {
+		username string
+		expected string
+	}{
+		{"john doe", "John"},
+		{"123 alice 456", "Alice"},
+		{"bob123 charlie", "bob123"},
+		{"david", "David"},
+		{"123 456 789", "123 456 789"},
+		{"", ""},
+		{"    ", "    "},
+		{"!@# john_doe", "john_doe"},
+		{"___123___", "___123___"},
+		{"   emily rose  ", "Emily"},
+		{"123 456abc", "456abc"},
+	}
+
+	for _, tt := range tests {
+		actual := GuessFirstName(tt.username)
+		if actual != tt.expected {
+			t.Errorf("GuessFirstName(%q) = %q; want %q", tt.username, actual, tt.expected)
+		}
+	}
+}

pkg/maintenance/email.go

@@ -254,7 +254,7 @@ func (j *UserEmailNotificationsJob) processNotificationsChunk(ctx context.Contex
 			Subject:   un.Subject,
 			EmailTo:   n.Email,
 			EmailFrom: emailFrom,
-			NameFrom:  common.PrivateCaptcha,
+			NameFrom:  common.PrivateCaptchaTeam,
 			ReplyTo:   replyToEmail,
 			HTMLBody:  htmlBodyTpl.String(),
 			TextBody:  textBodyTpl.String(),

pkg/portal/email.go

@@ -93,7 +93,7 @@ func (pm *PortalMailer) SendTwoFactor(ctx context.Context, email string, code in
 		Subject:   fmt.Sprintf("[%s] Your verification code is %v", common.PrivateCaptcha, data.Code),
 		EmailTo:   email,
 		EmailFrom: pm.EmailFrom.Value(),
-		NameFrom:  common.PrivateCaptcha,
+		NameFrom:  common.PrivateCaptchaTeam,
 	}
 
 	clog := slog.With("email", email, "code", data.Code)
@@ -151,7 +151,7 @@ func (pm *PortalMailer) SendWelcome(ctx context.Context, email, name string) err
 		Subject:   "Welcome to Private Captcha",
 		EmailTo:   email,
 		EmailFrom: pm.EmailFrom.Value(),
-		NameFrom:  common.PrivateCaptcha,
+		NameFrom:  common.PrivateCaptchaTeam,
 		ReplyTo:   pm.ReplyToEmail.Value(),
 	}
 

pkg/portal/jobs.go

@@ -36,5 +36,5 @@ func (j *onboardUserJob) InitialPause() time.Duration {
 }
 
 func (j *onboardUserJob) RunOnce(ctx context.Context) error {
-	return j.mailer.SendWelcome(ctx, j.user.Email, j.user.Name)
+	return j.mailer.SendWelcome(ctx, j.user.Email, common.GuessFirstName(j.user.Name))
 }