223 lines
7.3 KiB
Python
223 lines
7.3 KiB
Python
import logging
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from email.mime.multipart import MIMEMultipart
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from email.mime.text import MIMEText
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import aiosmtplib
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from app.config import settings
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logger = logging.getLogger(__name__)
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def build_email_shell(
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*,
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eyebrow: str,
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title: str,
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body_html: str,
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action_label: str | None = None,
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action_url: str | None = None,
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summary_html: str | None = None,
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footer_note: str = "此邮件由系统自动发送，请勿直接回复。",
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) -> str:
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action_html = ""
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if action_label and action_url:
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action_html = f"""
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<div style="margin-top:28px;">
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<a
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href="{action_url}"
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style="
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display:inline-block;
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padding:12px 22px;
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border-radius:999px;
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background:linear-gradient(135deg,#6c1a25 0%,#915435 62%,#d9b68d 130%);
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color:#fffaf3;
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text-decoration:none;
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font-size:14px;
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font-weight:600;
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letter-spacing:0.01em;
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box-shadow:0 14px 32px -18px rgba(83,25,24,0.55);
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"
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>
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{action_label}
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</a>
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</div>
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"""
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summary_block = ""
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if summary_html:
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summary_block = f"""
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<div
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style="
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margin:18px 0 0;
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padding:14px 16px;
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border:1px solid #eadcc8;
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border-radius:18px;
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background:#fff4e3;
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font-size:13px;
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line-height:1.8;
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color:#84553c;
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"
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>
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{summary_html}
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</div>
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"""
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return f"""
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<!doctype html>
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<html lang="zh-CN">
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<body style="margin:0;padding:0;background:#f7efe2;">
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<div style="margin:0;padding:32px 16px;background:linear-gradient(180deg,#f7efe2 0%,#f4ebdf 38%,#f9f5ee 100%);">
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<div style="max-width:640px;margin:0 auto;">
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<div
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style="
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overflow:hidden;
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border:1px solid #e7d3ba;
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border-radius:28px;
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background:#fffaf3;
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box-shadow:0 28px 80px -44px rgba(83,25,24,0.34);
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"
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>
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<div
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style="
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padding:32px 36px 28px;
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background:
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radial-gradient(circle at top, rgba(115,25,37,0.18), transparent 58%),
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linear-gradient(135deg, rgba(108,26,37,0.98), rgba(145,84,53,0.92) 58%, rgba(233,206,160,0.88) 140%);
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color:#fff7ee;
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"
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>
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<div
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style="
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display:inline-block;
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padding:7px 12px;
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border:1px solid rgba(255,245,231,0.28);
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border-radius:999px;
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background:rgba(255,250,242,0.08);
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font-size:11px;
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letter-spacing:0.24em;
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text-transform:uppercase;
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"
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>
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{eyebrow}
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</div>
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<h1 style="margin:18px 0 0;font-size:30px;line-height:1.22;font-weight:700;">
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香港大学中国商业学院
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</h1>
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<p style="margin:8px 0 0;font-size:14px;line-height:1.7;color:rgba(255,247,238,0.86);">
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HKU ICB · 班级信息管理平台
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</p>
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</div>
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<div style="padding:32px 36px 14px;">
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<h2 style="margin:0 0 14px;font-size:24px;line-height:1.35;color:#4e1d1a;">
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{title}
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</h2>
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<div style="font-size:15px;line-height:1.9;color:#775a4a;">
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{body_html}
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</div>
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{summary_block}
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{action_html}
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</div>
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<div style="padding:18px 36px 30px;">
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<div
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style="
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border-top:1px solid #eadcc8;
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padding-top:16px;
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font-size:12px;
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line-height:1.8;
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color:#9a7b68;
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"
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>
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{footer_note}
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</div>
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</div>
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</div>
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</div>
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</div>
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</body>
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</html>
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"""
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async def send_email(to: str, subject: str, html_body: str) -> bool:
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"""Send HTML email via SMTP. Returns True on success."""
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if not settings.smtp_host:
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logger.info(f"SMTP not configured, skipping email to {to}: {subject}")
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return False
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msg = MIMEMultipart("alternative")
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msg["From"] = f"{settings.smtp_from_name} <{settings.smtp_from_email}>"
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msg["To"] = to
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msg["Subject"] = subject
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msg.attach(MIMEText(html_body, "html"))
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try:
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await aiosmtplib.send(
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msg,
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hostname=settings.smtp_host,
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port=settings.smtp_port,
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username=settings.smtp_user,
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password=settings.smtp_password,
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use_tls=True,
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)
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return True
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except Exception as e:
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logger.error(f"Failed to send email to {to}: {e}")
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return False
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async def send_account_activated_email(member_email: str) -> bool:
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login_url = f"{settings.frontend_url.rstrip('/')}/login"
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html = build_email_shell(
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eyebrow="Account Ready",
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title="账号已激活，可以开始使用",
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body_html="""
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<p style="margin:0 0 12px;">你的 HKU ICB 班级账号已经成功激活。</p>
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<p style="margin:0;">现在可以使用注册邮箱登录平台，进入班级空间查看公告、排期、资源与成员信息。</p>
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""",
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action_label="立即登录",
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action_url=login_url,
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)
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return await send_email(member_email, "HKU ICB：账号激活成功", html)
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async def send_email_verification_code_email(member_email: str, code: str) -> bool:
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html = build_email_shell(
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eyebrow="Email Verification",
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title="请验证你的邮箱地址",
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body_html="""
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<p style="margin:0 0 12px;">你正在激活 HKU ICB 班级账号，请使用下方验证码完成邮箱验证。</p>
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<p style="margin:0;">验证码 10 分钟内有效；如果不是你本人操作，可以忽略此邮件。</p>
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""",
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summary_html=f"""
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<div style="font-size:12px;letter-spacing:0.18em;text-transform:uppercase;color:#9a7b68;">邮箱验证码</div>
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<div style="margin-top:8px;font-size:32px;line-height:1.2;font-weight:700;letter-spacing:0.32em;color:#4e1d1a;">{code}</div>
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""",
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)
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return await send_email(member_email, "HKU ICB：邮箱验证码", html)
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async def send_class_notification_email(
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emails: list[str],
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subject: str,
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title: str,
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body: str,
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action_url: str | None = None,
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eyebrow: str = "Class Update",
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action_label: str | None = "查看详情",
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summary_html: str | None = None,
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):
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"""Send a styled notification email to class members."""
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normalized_body = body.replace("\n", "<br />")
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html = build_email_shell(
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eyebrow=eyebrow,
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title=title,
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body_html=f"<div>{normalized_body}</div>",
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action_label=action_label if action_url else None,
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action_url=action_url,
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summary_html=summary_html,
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)
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for email in emails:
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await send_email(email, subject, html)
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