feat(core): improve CNAME binding logic with CAS and update hostname validation

tests/cname_test.go

@@ -0,0 +1,69 @@
+package tests
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"gopkg.d7z.net/gitea-pages/pkg/core"
+	"gopkg.d7z.net/middleware/kv"
+)
+
+func TestCNAMERegex(t *testing.T) {
+	db, _ := kv.NewMemory("")
+	meta := core.NewServerMeta(nil, nil, "example.com", nil, db, 0, 0, 0)
+
+	tests := []struct {
+		domain string
+		valid  bool
+	}{
+		{"a.com", true},
+		{"sub.a.com", true},
+		{"a.b.c.d.com", true},
+		{"invalid_name.com", false},
+		{"-start.com", false},
+		{"end-.com", false},
+		{"a.com-too-long-tld-xxxxxxxxxxxxxxxxxxx", false},
+	}
+
+	for _, tt := range tests {
+		_, ok := meta.AliasCheck(tt.domain)
+		assert.Equal(t, tt.valid, ok, "Testing domain: %s", tt.domain)
+	}
+}
+
+func TestAliasBindCAS(t *testing.T) {
+	db, _ := kv.NewMemory("")
+
+	alias := core.NewDomainAlias(db)
+
+	ctx := context.Background()
+
+	err := alias.Bind(ctx, []string{"a.com", "b.com"}, "owner1", "repo1")
+
+	assert.NoError(t, err)
+
+	a, err := alias.Query(ctx, "a.com")
+
+	assert.NoError(t, err)
+
+	if assert.NotNil(t, a) {
+		assert.Equal(t, "owner1", a.Owner)
+	}
+
+	err = alias.Bind(ctx, []string{"b.com", "c.com"}, "owner1", "repo1")
+
+	assert.NoError(t, err)
+
+	_, err = alias.Query(ctx, "a.com")
+
+	assert.Error(t, err)
+
+	a, err = alias.Query(ctx, "c.com")
+
+	assert.NoError(t, err)
+
+	if assert.NotNil(t, a) {
+		assert.Equal(t, "owner1", a.Owner)
+	}
+}