commit 59f43eb13d25f5c66618a43baf236bd7dfb72513 · julien.rbrt.fr/tangled-core

+7 -12

appview/email/email.go

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       import (

     

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       	"fmt"

     

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       	"net"

     

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       -
       	"regexp"

     

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       	"strings"

     

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       	"github.com/resend/resend-go/v2"

     
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       }

     

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       func IsValidEmail(email string) bool {

     

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       	// Basic length check

     

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       	if len(email) < 3 || len(email) > 254 {

     

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       		return false

     

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       	}

     

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       	// Regular expression for email validation (RFC 5322 compliant)

     

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       	pattern := `^[a-zA-Z0-9.!#$%&'*+/=?^_\x60{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$`

     

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       	// Compile regex

     

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       	regex := regexp.MustCompile(pattern)

     

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       	// Check if email matches regex pattern

     

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       	if !regex.MatchString(email) {

     

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       		return false

     

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       	}

     

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       	// Split email into local and domain parts

     

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       	parts := strings.Split(email, "@")

     

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       	domain := parts[1]

     

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       	mx, err := net.LookupMX(domain)

···

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       import (

     

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       	"fmt"

     

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       	"net"

     

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       	"net/mail"

     

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       	"strings"

     

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       	"github.com/resend/resend-go/v2"

     
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       }

     

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       func IsValidEmail(email string) bool {

     

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       	// Reject whitespace (ParseAddress normalizes it away)

     

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       	if strings.ContainsAny(email, " \t\n\r") {

     

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       		return false

     

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       	}

     

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       	// Use stdlib RFC 5322 parser

     

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       	addr, err := mail.ParseAddress(email)

     

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       	if err != nil {

     

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       		return false

     

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       	}

     

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       	// Split email into local and domain parts

     

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       	parts := strings.Split(addr.Address, "@")

     

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       	domain := parts[1]

     

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       	mx, err := net.LookupMX(domain)

+53

appview/email/email_test.go

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       package email

     

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       import (

     

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       	"testing"

     

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       )

     

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       func TestIsValidEmail(t *testing.T) {

     

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       	tests := []struct {

     

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       		name  string

     

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       		email string

     

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       		want  bool

     

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       	}{

     

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       		// Valid emails using RFC 2606 reserved domains

     

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       		{"standard email", "user@example.com", true},

     

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       		{"single char local", "a@example.com", true},

     

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       		{"dot in middle", "first.last@example.com", true},

     

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       		{"multiple dots", "a.b.c@example.com", true},

     

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       		{"plus tag", "user+tag@example.com", true},

     

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       		{"numbers", "user123@example.com", true},

     

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       		{"example.org", "user@example.org", true},

     

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       		{"example.net", "user@example.net", true},

     

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       		// Invalid format - rejected by mail.ParseAddress

     

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       		{"empty string", "", false},

     

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       		{"no at sign", "userexample.com", false},

     

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       		{"no domain", "user@", false},

     

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       		{"no local part", "@example.com", false},

     

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       		{"double at", "user@@example.com", false},

     

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       		{"just at sign", "@", false},

     

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       		{"leading dot", ".user@example.com", false},

     

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       		{"trailing dot", "user.@example.com", false},

     

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       		{"consecutive dots", "user..name@example.com", false},

     

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       		// Whitespace - rejected before parsing

     

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       		{"space in local", "user @example.com", false},

     

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       		{"space in domain", "user@ example.com", false},

     

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       		{"tab", "user\t@example.com", false},

     

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       		{"newline", "user\n@example.com", false},

     

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       		// MX lookup - using RFC 2606 reserved TLDs (guaranteed no MX)

     

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       		{"invalid TLD", "user@example.invalid", false},

     

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       		{"test TLD", "user@mail.test", false},

     

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       	}

     

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       	for _, tt := range tests {

     

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       		t.Run(tt.name, func(t *testing.T) {

     

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       			got := IsValidEmail(tt.email)

     

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       			if got != tt.want {

     

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       				t.Errorf("IsValidEmail(%q) = %v, want %v", tt.email, got, tt.want)

     

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       			}

     

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       		})

     

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       	}

     

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       }