Files
remnawave-minishop/backend/bot/services/email_templates.py
T

647 lines
23 KiB
Python

"""Branded HTML email templates that mirror the subscription Mini App look.
The web app uses a dark theme with a configurable accent colour
admin-configured accent colour and logo. The same
accent + logo are reused here so emails feel like part of the product. All
copy goes through the shared `JsonI18n` instance so translations live in
``locales/<lang>.json`` next to the rest of the bot strings.
"""
from __future__ import annotations
import html
import re
from dataclasses import dataclass
from typing import Optional, Sequence, Tuple
from urllib.parse import urlsplit
from bot.middlewares.i18n import JsonI18n, get_i18n_instance
from config.settings import Settings
_BG = "#05070a"
_CARD_BG = "#0e1116"
_BORDER = "#1a1f27"
_TEXT = "#e6e9ef"
_TEXT_MUTED = "#9aa3b2"
_TEXT_DIM = "#5d6573"
_DEFAULT_ACCENT = "#00fe7a"
_HEX_RE = re.compile(r"^#(?:[0-9a-fA-F]{3}|[0-9a-fA-F]{6})$")
@dataclass(frozen=True)
class EmailContent:
subject: str
text: str
html: str
def _safe_color(value: Optional[str]) -> str:
if not value:
return _DEFAULT_ACCENT
candidate = value.strip()
if _HEX_RE.match(candidate):
return candidate
return _DEFAULT_ACCENT
def _public_logo_url(settings: Settings) -> Optional[str]:
"""Email recipients can't reach the in-app /webapp-logo proxy, so only a
stored public https URL can be used directly. Anything else is dropped."""
if getattr(settings, "WEBAPP_LOGO_USE_EMOJI", False):
return None
raw = (settings.WEBAPP_LOGO_URL or "").strip()
if not raw:
return None
parsed = urlsplit(raw)
if parsed.scheme != "https" or not parsed.hostname:
return None
return raw
def _brand_title(settings: Settings) -> str:
title = (settings.WEBAPP_TITLE or "").strip()
return title or "Subscription"
def _normalize_lang(language_code: Optional[str], settings: Settings) -> str:
return (language_code or settings.DEFAULT_LANGUAGE or "ru").split("-")[0]
def _resolve_i18n(i18n: Optional[JsonI18n]) -> JsonI18n:
return i18n or get_i18n_instance()
def _t_html(i18n: JsonI18n, lang: str, key: str, **kwargs) -> str:
"""Translate for HTML context: format args are HTML-escaped, the
translated template itself is treated as already-safe HTML (locale files
are author-controlled and may include simple inline tags like <strong>)."""
safe_kwargs = {k: html.escape(str(v)) for k, v in kwargs.items()}
return i18n.gettext(lang, key, **safe_kwargs)
def _t_text(i18n: JsonI18n, lang: str, key: str, **kwargs) -> str:
return i18n.gettext(lang, key, **kwargs)
def _layout(
*,
settings: Settings,
preheader: str,
heading: str,
intro_html: str,
body_html: str,
footer_html: str,
) -> str:
accent = _safe_color(settings.WEBAPP_PRIMARY_COLOR)
brand_title = html.escape(_brand_title(settings))
logo_url = _public_logo_url(settings)
logo_block = ""
if logo_url:
logo_block = (
f'<img src="{html.escape(logo_url, quote=True)}" width="64" height="64" '
f'alt="" style="display:block;border:0;outline:none;text-decoration:none;'
f'border-radius:16px;">'
)
return f"""<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1">
<meta name="color-scheme" content="dark">
<meta name="supported-color-schemes" content="dark">
<title>{html.escape(heading)}</title>
</head>
<body style="margin:0;padding:0;background:{_BG};font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;color:{_TEXT};">
<div style="display:none;max-height:0;overflow:hidden;opacity:0;color:transparent;mso-hide:all;">{html.escape(preheader)}</div>
<table role="presentation" width="100%" cellpadding="0" cellspacing="0" border="0" style="background:{_BG};">
<tr>
<td align="center" style="padding:32px 16px;">
<table role="presentation" width="100%" cellpadding="0" cellspacing="0" border="0" style="max-width:480px;">
<tr>
<td align="center" style="padding-bottom:24px;">
{logo_block}
<div style="margin-top:14px;font-family:'JetBrains Mono','SFMono-Regular',Menlo,Consolas,monospace;font-weight:800;font-size:22px;line-height:1.05;color:{accent};letter-spacing:0;">{brand_title}</div>
</td>
</tr>
<tr>
<td style="background:{_CARD_BG};border:1px solid {_BORDER};border-radius:18px;padding:28px;">
<h1 style="margin:0 0 10px 0;font-size:20px;line-height:1.25;font-weight:700;color:#ffffff;">{html.escape(heading)}</h1>
<div style="margin:0 0 20px 0;font-size:14px;line-height:1.55;color:{_TEXT_MUTED};">{intro_html}</div>
{body_html}
</td>
</tr>
<tr>
<td align="center" style="padding-top:20px;">
<div style="font-size:11px;line-height:1.55;color:{_TEXT_DIM};">{footer_html}</div>
</td>
</tr>
</table>
</td>
</tr>
</table>
</body>
</html>
""" # noqa: E501
def _info_rows_html(rows: Sequence[Tuple[str, str]]) -> str:
if not rows:
return ""
last = len(rows) - 1
cells = []
for index, (label, value) in enumerate(rows):
border = "" if index == last else f"border-bottom:1px solid {_BORDER};"
cells.append(
f"<tr>"
f'<td style="padding:11px 0;{border}font-size:12px;color:{_TEXT_DIM};text-transform:uppercase;letter-spacing:0.04em;">{html.escape(label)}</td>' # noqa: E501
f"<td align=\"right\" style=\"padding:11px 0;{border}font-family:'JetBrains Mono','SFMono-Regular',Menlo,Consolas,monospace;font-size:14px;font-weight:600;color:{_TEXT};\">{html.escape(value)}</td>" # noqa: E501
f"</tr>"
)
return (
f'<table role="presentation" width="100%" cellpadding="0" cellspacing="0" border="0" '
f'style="margin:0 0 16px 0;background:{_BG};border:1px solid {_BORDER};border-radius:14px;padding:6px 16px;">' # noqa: E501
+ "".join(cells)
+ "</table>"
)
def _cta_button_html(*, label: str, url: str, accent: str) -> str:
safe_label = html.escape(label)
safe_url = html.escape(url, quote=True)
# Accent green is light, so contrast text is dark; works for the default and similar light accents. # noqa: E501
return (
f'<table role="presentation" width="100%" cellpadding="0" cellspacing="0" border="0" '
f'style="width:100%;margin:22px 0 18px 0;">'
f'<tr><td align="center" bgcolor="{accent}" style="background:{accent};border-radius:12px;">' # noqa: E501
f'<a href="{safe_url}" target="_blank" rel="noopener" '
f'style="display:block;width:100%;box-sizing:border-box;padding:15px 22px;'
f"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;" # noqa: E501
f'font-size:15px;font-weight:700;color:#05070a;text-decoration:none;letter-spacing:0.02em;text-align:center;">{safe_label}</a>'
f"</td></tr></table>"
)
def _format_amount(amount: float, currency: str) -> str:
rounded = round(float(amount), 2)
if rounded.is_integer():
body = f"{int(rounded)}"
else:
body = f"{rounded:.2f}"
suffix = (currency or "").strip()
return f"{body} {suffix}".strip()
def _format_traffic(traffic_gb: Optional[float]) -> str:
if traffic_gb is None:
return "—"
value = float(traffic_gb)
return str(int(value)) if value.is_integer() else f"{value:g}"
def _format_minutes(seconds: int) -> int:
return max(1, int(seconds) // 60)
def render_login_code(
settings: Settings,
*,
code: str,
language_code: Optional[str],
magic_link: Optional[str] = None,
purpose: str = "login",
i18n: Optional[JsonI18n] = None,
) -> EmailContent:
i18n = _resolve_i18n(i18n)
lang = _normalize_lang(language_code, settings)
minutes = _format_minutes(settings.EMAIL_CODE_TTL_SECONDS)
accent = _safe_color(settings.WEBAPP_PRIMARY_COLOR)
brand = _brand_title(settings)
template_prefix = "email_set_password_code" if purpose == "set_password" else "email_login_code"
safe_magic_link = (magic_link or "").strip() if template_prefix == "email_login_code" else ""
subject = _t_text(i18n, lang, f"{template_prefix}_subject", code=code)
preheader = _t_text(i18n, lang, f"{template_prefix}_preheader", minutes=minutes)
heading = _t_text(i18n, lang, f"{template_prefix}_heading")
intro = _t_text(i18n, lang, f"{template_prefix}_intro")
expiry_html = _t_html(i18n, lang, f"{template_prefix}_expiry_html", minutes=minutes)
security = _t_text(i18n, lang, f"{template_prefix}_security")
footer = _t_html(i18n, lang, "email_footer_auto", brand=brand)
text_lines = [_t_text(i18n, lang, f"{template_prefix}_text", code=code, minutes=minutes)]
if safe_magic_link:
text_lines.append(_t_text(i18n, lang, "email_login_code_text_magic", url=safe_magic_link))
code_block = (
f'<table role="presentation" width="100%" cellpadding="0" cellspacing="0" border="0" style="margin:0 0 18px 0;">' # noqa: E501
f'<tr><td align="center" style="background:{_BG};border:1px solid {_BORDER};border-radius:14px;padding:22px 16px;">' # noqa: E501
f"<div style=\"font-family:'JetBrains Mono','SFMono-Regular',Menlo,Consolas,monospace;font-size:36px;line-height:1;font-weight:700;letter-spacing:10px;color:{accent};\">" # noqa: E501
f"{html.escape(code)}"
f"</div></td></tr></table>"
)
magic_block = ""
if safe_magic_link:
cta_label = _t_text(i18n, lang, "email_login_code_magic_cta")
divider_label = _t_text(i18n, lang, "email_login_code_magic_or")
magic_intro = _t_text(i18n, lang, "email_login_code_magic_intro")
magic_hint = _t_text(i18n, lang, "email_login_code_magic_hint")
divider_html = (
f'<table role="presentation" width="100%" cellpadding="0" cellspacing="0" border="0" style="margin:4px 0 14px 0;">' # noqa: E501
f"<tr>"
f'<td width="40%" style="border-bottom:1px solid {_BORDER};font-size:0;line-height:0;">&nbsp;</td>' # noqa: E501
f'<td align="center" style="padding:0 10px;font-size:11px;letter-spacing:0.08em;text-transform:uppercase;color:{_TEXT_DIM};white-space:nowrap;">{html.escape(divider_label)}</td>' # noqa: E501
f'<td width="40%" style="border-bottom:1px solid {_BORDER};font-size:0;line-height:0;">&nbsp;</td>' # noqa: E501
f"</tr></table>"
)
magic_block = (
divider_html
+ f'<p style="margin:0 0 4px 0;font-size:13px;line-height:1.55;color:{_TEXT_MUTED};text-align:center;">{html.escape(magic_intro)}</p>' # noqa: E501
+ _cta_button_html(label=cta_label, url=safe_magic_link, accent=accent)
+ f'<p style="margin:0 0 6px 0;font-size:12px;line-height:1.55;color:{_TEXT_DIM};text-align:center;">{html.escape(magic_hint)}</p>' # noqa: E501
)
body_html = (
code_block
+ f'<p style="margin:0 0 8px 0;font-size:13px;line-height:1.55;color:{_TEXT_MUTED};">{expiry_html}</p>' # noqa: E501
+ f'<p style="margin:0 0 4px 0;font-size:12px;line-height:1.55;color:{_TEXT_DIM};">{html.escape(security)}</p>' # noqa: E501
+ magic_block
)
rendered = _layout(
settings=settings,
preheader=preheader,
heading=heading,
intro_html=html.escape(intro),
body_html=body_html,
footer_html=footer,
)
return EmailContent(subject=subject, text="\n".join(text_lines), html=rendered)
def render_account_merged(
settings: Settings,
*,
language_code: Optional[str],
primary_user_id: Optional[int],
removed_user_id: Optional[int],
final_end_date_text: str,
i18n: Optional[JsonI18n] = None,
) -> EmailContent:
i18n = _resolve_i18n(i18n)
lang = _normalize_lang(language_code, settings)
brand = _brand_title(settings)
primary = "—" if primary_user_id is None else f"#{primary_user_id}"
removed = "—" if removed_user_id is None else f"#{removed_user_id}"
end_date = final_end_date_text or "—"
subject = _t_text(i18n, lang, "email_account_merged_subject")
preheader = _t_text(i18n, lang, "email_account_merged_preheader")
heading = _t_text(i18n, lang, "email_account_merged_heading")
intro = _t_text(i18n, lang, "email_account_merged_intro")
note = _t_text(i18n, lang, "email_account_merged_note")
footer = _t_html(i18n, lang, "email_footer_auto", brand=brand)
text = _t_text(
i18n,
lang,
"email_account_merged_text",
primary=primary,
removed=removed,
end_date=end_date,
)
rows = [
(_t_text(i18n, lang, "email_account_merged_row_kept"), primary),
(_t_text(i18n, lang, "email_account_merged_row_removed"), removed),
(_t_text(i18n, lang, "email_account_merged_row_end_date"), end_date),
]
body_html = (
_info_rows_html(rows)
+ f'<p style="margin:0;font-size:12px;line-height:1.55;color:{_TEXT_DIM};">{html.escape(note)}</p>' # noqa: E501
)
rendered = _layout(
settings=settings,
preheader=preheader,
heading=heading,
intro_html=html.escape(intro),
body_html=body_html,
footer_html=footer,
)
return EmailContent(subject=subject, text=text, html=rendered)
def render_payment_success(
settings: Settings,
*,
language_code: Optional[str],
sale_mode: str,
months: int,
traffic_gb: Optional[float],
amount: float,
currency: str,
end_date_text: str,
dashboard_url: Optional[str],
provider_label: Optional[str] = None,
i18n: Optional[JsonI18n] = None,
) -> EmailContent:
i18n = _resolve_i18n(i18n)
lang = _normalize_lang(language_code, settings)
accent = _safe_color(settings.WEBAPP_PRIMARY_COLOR)
brand = _brand_title(settings)
is_traffic = (sale_mode or "").split("@", 1)[0].split("|", 1)[0] in {
"traffic",
"traffic_package",
"topup",
"premium_topup",
}
amount_text = _format_amount(amount, currency)
safe_dashboard_url = (dashboard_url or "").strip()
end_date = end_date_text or "—"
traffic_label = _format_traffic(traffic_gb)
subject = _t_text(i18n, lang, "email_payment_success_subject")
preheader = _t_text(i18n, lang, "email_payment_success_preheader")
heading = _t_text(i18n, lang, "email_payment_success_heading")
footer_note = _t_text(i18n, lang, "email_payment_success_footer_note")
footer = _t_html(i18n, lang, "email_footer_auto", brand=brand)
cta_label = _t_text(i18n, lang, "email_payment_success_cta")
if is_traffic:
intro = _t_text(i18n, lang, "email_payment_success_intro_traffic", traffic_gb=traffic_label)
period_label = _t_text(i18n, lang, "email_payment_success_row_traffic")
period_value = _t_text(
i18n, lang, "email_payment_success_traffic_value", traffic_gb=traffic_label
)
text = _t_text(
i18n,
lang,
"email_payment_success_text_traffic",
amount=amount_text,
traffic_gb=traffic_label,
end_date=end_date,
)
else:
months_int = int(months or 0)
intro = _t_text(i18n, lang, "email_payment_success_intro_subscription", months=months_int)
period_label = _t_text(i18n, lang, "email_payment_success_row_period")
period_value = _t_text(
i18n,
lang,
"email_payment_success_period_value",
months=months_int,
)
text = _t_text(
i18n,
lang,
"email_payment_success_text_subscription",
amount=amount_text,
months=months_int,
end_date=end_date,
)
rows: list[Tuple[str, str]] = [
(period_label, period_value),
(_t_text(i18n, lang, "email_payment_success_row_amount"), amount_text),
(_t_text(i18n, lang, "email_payment_success_row_end_date"), end_date),
]
if provider_label:
rows.append((_t_text(i18n, lang, "email_payment_success_row_method"), provider_label))
text_lines = [text]
if safe_dashboard_url:
text_lines.append(
_t_text(i18n, lang, "email_payment_success_text_dashboard", url=safe_dashboard_url)
)
body_parts = [_info_rows_html(rows)]
if safe_dashboard_url:
body_parts.append(_cta_button_html(label=cta_label, url=safe_dashboard_url, accent=accent))
body_parts.append(
f'<p style="margin:6px 0 0 0;font-size:12px;line-height:1.55;color:{_TEXT_DIM};">{html.escape(footer_note)}</p>' # noqa: E501
)
rendered = _layout(
settings=settings,
preheader=preheader,
heading=heading,
intro_html=html.escape(intro),
body_html="".join(body_parts),
footer_html=footer,
)
return EmailContent(subject=subject, text="\n".join(text_lines), html=rendered)
def render_subscription_expiring(
settings: Settings,
*,
language_code: Optional[str],
days_left: int,
end_date_text: str,
dashboard_url: Optional[str],
i18n: Optional[JsonI18n] = None,
) -> EmailContent:
i18n = _resolve_i18n(i18n)
lang = _normalize_lang(language_code, settings)
accent = _safe_color(settings.WEBAPP_PRIMARY_COLOR)
brand = _brand_title(settings)
safe_dashboard_url = (dashboard_url or "").strip()
days = max(0, int(days_left))
end_date = end_date_text or "—"
if days == 0:
suffix = "today"
elif days == 1:
suffix = "tomorrow"
else:
suffix = "days"
subject = _t_text(i18n, lang, f"email_subscription_expiring_subject_{suffix}", days=days)
heading = _t_text(i18n, lang, f"email_subscription_expiring_heading_{suffix}", days=days)
preheader = _t_text(i18n, lang, f"email_subscription_expiring_preheader_{suffix}", days=days)
intro = _t_text(i18n, lang, f"email_subscription_expiring_intro_{suffix}", days=days)
note = _t_text(i18n, lang, "email_subscription_expiring_note")
footer = _t_html(i18n, lang, "email_footer_auto", brand=brand)
cta_label = _t_text(i18n, lang, "email_subscription_expiring_cta")
rows = [
(_t_text(i18n, lang, "email_subscription_expiring_row_days_left"), str(days)),
(_t_text(i18n, lang, "email_subscription_expiring_row_end_date"), end_date),
]
text_lines = [
_t_text(i18n, lang, "email_subscription_expiring_text", heading=heading, end_date=end_date),
]
if safe_dashboard_url:
text_lines.append(
_t_text(i18n, lang, "email_subscription_expiring_text_renew", url=safe_dashboard_url)
)
body_parts = [_info_rows_html(rows)]
if safe_dashboard_url:
body_parts.append(_cta_button_html(label=cta_label, url=safe_dashboard_url, accent=accent))
body_parts.append(
f'<p style="margin:6px 0 0 0;font-size:12px;line-height:1.55;color:{_TEXT_DIM};">{html.escape(note)}</p>' # noqa: E501
)
rendered = _layout(
settings=settings,
preheader=preheader,
heading=heading,
intro_html=html.escape(intro),
body_html="".join(body_parts),
footer_html=footer,
)
return EmailContent(subject=subject, text="\n".join(text_lines), html=rendered)
def _support_email(
settings: Settings,
i18n: Optional[JsonI18n],
language: Optional[str],
*,
subject: str,
heading: str,
intro: str,
rows: Sequence[Tuple[str, str]],
body_preview: str,
ticket_url: Optional[str],
cta_label: str,
) -> EmailContent:
lang = _normalize_lang(language, settings)
brand = _brand_title(settings)
accent = _safe_color(settings.WEBAPP_PRIMARY_COLOR)
safe_url = (ticket_url or "").strip()
footer = _t_html(_resolve_i18n(i18n), lang, "email_footer_auto", brand=brand)
preview_block = (
f'<div style="margin:0 0 16px 0;background:{_BG};border:1px solid {_BORDER};'
f'border-radius:14px;padding:14px 16px;font-size:14px;line-height:1.55;color:{_TEXT};'
f'white-space:pre-wrap;">{html.escape(body_preview or "")}</div>'
)
body_parts = [_info_rows_html(rows), preview_block]
if safe_url:
body_parts.append(_cta_button_html(label=cta_label, url=safe_url, accent=accent))
rendered = _layout(
settings=settings,
preheader=intro,
heading=heading,
intro_html=html.escape(intro),
body_html="".join(body_parts),
footer_html=footer,
)
text_lines = [intro, "", *[f"{label}: {value}" for label, value in rows], "", body_preview]
if safe_url:
text_lines.extend(["", safe_url])
return EmailContent(subject=subject, text="\n".join(text_lines), html=rendered)
def render_support_new_ticket_admin(
settings: Settings,
i18n: Optional[JsonI18n],
language: Optional[str],
*,
ticket_id: int,
user_display: str,
subject: str,
body_preview: str,
snapshot_rows: Sequence[Tuple[str, str]],
ticket_url: Optional[str],
) -> EmailContent:
rows = [
("Ticket", f"#{ticket_id}"),
("User", user_display),
("Subject", subject),
*snapshot_rows,
]
return _support_email(
settings,
i18n,
language,
subject=f"New support ticket #{ticket_id}",
heading=f"New support ticket #{ticket_id}",
intro="A user opened a new support ticket.",
rows=rows,
body_preview=body_preview,
ticket_url=ticket_url,
cta_label="Open ticket",
)
def render_support_user_reply_admin(
settings: Settings,
i18n: Optional[JsonI18n],
language: Optional[str],
*,
ticket_id: int,
user_display: str,
subject: str,
body_preview: str,
snapshot_rows: Sequence[Tuple[str, str]],
ticket_url: Optional[str],
) -> EmailContent:
rows = [
("Ticket", f"#{ticket_id}"),
("User", user_display),
("Subject", subject),
*snapshot_rows,
]
return _support_email(
settings,
i18n,
language,
subject=f"New user reply in ticket #{ticket_id}",
heading=f"User replied in ticket #{ticket_id}",
intro="A user sent a new support message.",
rows=rows,
body_preview=body_preview,
ticket_url=ticket_url,
cta_label="Open ticket",
)
def render_support_admin_reply_user(
settings: Settings,
i18n: Optional[JsonI18n],
language: Optional[str],
*,
ticket_id: int,
subject: str,
body_preview: str,
ticket_url: Optional[str],
) -> EmailContent:
return _support_email(
settings,
i18n,
language,
subject=f"New reply for ticket #{ticket_id}",
heading=f"New reply for ticket #{ticket_id}",
intro="Support has replied to your ticket.",
rows=[("Ticket", f"#{ticket_id}"), ("Subject", subject)],
body_preview=body_preview,
ticket_url=ticket_url,
cta_label="Open in Mini App",
)
def render_support_ticket_closed_user(
settings: Settings,
i18n: Optional[JsonI18n],
language: Optional[str],
*,
ticket_id: int,
subject: str,
body_preview: str = "",
ticket_url: Optional[str],
) -> EmailContent:
return _support_email(
settings,
i18n,
language,
subject=f"Ticket #{ticket_id} was closed",
heading=f"Ticket #{ticket_id} was closed",
intro="Your support ticket has been closed.",
rows=[("Ticket", f"#{ticket_id}"), ("Subject", subject)],
body_preview=body_preview or "The ticket is closed.",
ticket_url=ticket_url,
cta_label="Open in Mini App",
)