新增資料庫架構

lib/email-validation.ts

@@ -0,0 +1,60 @@
+// Email 驗證工具
+export function isValidEmail(email: string): boolean {
+  if (!email) return true // 空值是允許的（可選欄位）
+
+  const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/
+  return emailRegex.test(email)
+}
+
+export function sanitizeEmail(email: string): string {
+  return email.trim().toLowerCase()
+}
+
+export function getEmailDomain(email: string): string {
+  const parts = email.split("@")
+  return parts.length > 1 ? parts[1] : ""
+}
+
+// 檢查是否為常見的臨時郵箱服務
+const temporaryEmailDomains = [
+  "10minutemail.com",
+  "guerrillamail.com",
+  "mailinator.com",
+  "tempmail.org",
+  "throwaway.email",
+]
+
+export function isTemporaryEmail(email: string): boolean {
+  if (!email) return false
+
+  const domain = getEmailDomain(email)
+  return temporaryEmailDomains.includes(domain)
+}
+
+export function validateEmailForSubmission(email: string): {
+  isValid: boolean
+  message?: string
+  suggestion?: string
+} {
+  if (!email) {
+    return { isValid: true } // 空值允許
+  }
+
+  if (!isValidEmail(email)) {
+    return {
+      isValid: false,
+      message: "請輸入有效的 Email 格式",
+      suggestion: "例如：your.name@company.com",
+    }
+  }
+
+  if (isTemporaryEmail(email)) {
+    return {
+      isValid: false,
+      message: "請避免使用臨時郵箱服務",
+      suggestion: "建議使用常用的 Email 地址，以便我們能夠聯繫到你",
+    }
+  }
+
+  return { isValid: true }
+}