95 lines
4.4 KiB
Go
95 lines
4.4 KiB
Go
package service
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import (
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"fmt"
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"html"
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"strings"
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)
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// BuildRegisterCodeMail 生成注册验证码邮件（纯文本 + HTML）
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// 预览文案刻意不把验证码与「10分钟」紧邻，避免邮箱摘要显示成 8 位数字。
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func BuildRegisterCodeMail(siteName, code string, ttlMinutes int) (subject, textBody, htmlBody string) {
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siteName = strings.TrimSpace(siteName)
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if siteName == "" {
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siteName = "姜十三论坛"
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}
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if ttlMinutes <= 0 {
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ttlMinutes = 10
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}
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subject = fmt.Sprintf("【%s】注册验证码", siteName)
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// 纯文本：验证码单独成段，数字间加空格，有效期另起一段
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spaced := strings.Join(strings.Split(code, ""), " ")
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textBody = fmt.Sprintf(
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"你好，\n\n你正在注册 %s。请在注册页填写以下验证码：\n\n%s\n\n（共 %d 位数字）\n\n有效期：%d 分钟。\n如非本人操作，请忽略本邮件。\n\n— %s\n",
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siteName, spaced, len(code), ttlMinutes, siteName,
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)
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safeSite := html.EscapeString(siteName)
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safeCode := html.EscapeString(code)
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// 预览摘要：不含验证码数字，避免与有效期粘连
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preheader := html.EscapeString(fmt.Sprintf("完成 %s 注册：请填写邮件中的验证码，有效期 %d 分钟。", siteName, ttlMinutes))
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htmlBody = fmt.Sprintf(`<!DOCTYPE html>
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<html lang="zh-CN">
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<head>
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<meta charset="UTF-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1" />
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<title>%s</title>
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</head>
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<body style="margin:0;padding:0;background:#f5f7fa;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;color:#1f2937;">
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<div style="display:none;max-height:0;overflow:hidden;opacity:0;color:transparent;mso-hide:all;">%s</div>
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<table role="presentation" width="100%%" cellpadding="0" cellspacing="0" style="background:#f5f7fa;padding:28px 12px;">
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<tr>
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<td align="center">
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<table role="presentation" width="100%%" cellpadding="0" cellspacing="0" style="max-width:520px;background:#ffffff;border-radius:12px;border:1px solid #e5e7eb;overflow:hidden;">
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<tr>
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<td style="padding:20px 28px;background:linear-gradient(135deg,#18a058,#138f4c);color:#ffffff;">
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<div style="font-size:18px;font-weight:700;letter-spacing:0.02em;">%s</div>
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<div style="margin-top:4px;font-size:13px;opacity:0.92;">注册邮箱验证</div>
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</td>
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</tr>
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<tr>
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<td style="padding:28px;">
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<p style="margin:0 0 12px;font-size:15px;line-height:1.6;">你好，</p>
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<p style="margin:0 0 20px;font-size:14px;line-height:1.7;color:#4b5563;">你正在注册 <strong style="color:#111827;">%s</strong>。请在注册页面输入下方验证码：</p>
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<div style="margin:0 0 8px;text-align:center;font-size:12px;color:#6b7280;letter-spacing:0.08em;">验 证 码</div>
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<div style="margin:0 auto 8px;max-width:280px;padding:16px 12px;text-align:center;background:#edfbf3;border:1px solid rgba(24,160,88,0.28);border-radius:10px;font-size:28px;font-weight:700;letter-spacing:0.35em;color:#138f4c;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;">
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%s
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</div>
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<p style="margin:0 0 20px;text-align:center;font-size:12px;color:#9ca3af;">共 %d 位数字，请完整输入</p>
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<table role="presentation" width="100%%" cellpadding="0" cellspacing="0" style="margin:0 0 20px;background:#f8fafc;border-radius:8px;">
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<tr>
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<td style="padding:12px 14px;font-size:13px;line-height:1.6;color:#4b5563;">
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<strong style="color:#111827;">有效期</strong>：%d 分钟<br />
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超时请返回注册页重新获取验证码。
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</td>
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</tr>
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</table>
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<p style="margin:0;font-size:12px;line-height:1.6;color:#9ca3af;">如非本人操作，请忽略本邮件。请勿将验证码告知他人。</p>
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</td>
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</tr>
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<tr>
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<td style="padding:14px 28px;border-top:1px solid #f1f5f9;font-size:12px;color:#9ca3af;text-align:center;">
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此邮件由 %s 自动发送，请勿直接回复
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</td>
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</tr>
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</table>
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</td>
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</tr>
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</table>
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</body>
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</html>`,
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html.EscapeString(subject),
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preheader,
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safeSite,
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safeSite,
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safeCode,
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len(code),
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ttlMinutes,
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safeSite,
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)
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return subject, textBody, htmlBody
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}
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