Files
MathApp/accounts/serializers.py
Zareian 42783f9ba4 tutor answers step by step in plain text, islands finish, and the audit's money and login holes are closed
Tutor (prompt tutor-v3-stepwise-plain): plain text instead of LaTeX/markdown,
with rag/services/mathtext.py converting whatever still slips through; full
step-by-step solutions with a check before the final answer; three tones by
grade; the last 6 messages of the conversation go to the model and follow-ups
are no longer served from another user's cache; book solutions the checker
disputes are kept out of the context; a questionId gives the tutor the
practice question and the student's wrong answer. /api/health reports when
the AI credit runs out. rag_model_benchmark compares chat models on verified
book problems (run on the server; credit ran out mid-run).

Map: only lessons that have questions count toward finishing an island,
lessonIds[0] / nextLessonId is always the next lesson to play, and a finished
island stays finished. The Seyar characters (sigma/delta/pi) are seeded.

Audit fixes, each reproduced before fixing:
- the plan is stored on the order, so paying a monthly order after starting
  a yearly checkout no longer grants a year
- opening checkout no longer demotes an active subscription; renewals extend
  from the current expiry; expired subscriptions are not reported active
- one discount code per order and only before the gateway; a 100% code
  completes the purchase; lost Zarinpal confirmations are re-verified
- the unused /api/payment/webhook "mark paid" endpoint is removed
- XP counts only answers recorded on the server
- 6-digit OTP, each code dies after 5 wrong guesses; POST /api/auth/logout
- a guest who signs up keeps their account and progress (test phones excluded)
- affiliate commission on the first real payment; guests excluded
- parents with several children no longer get a 500
- SQLite runs transactions IMMEDIATE, since it ignores select_for_update
- admin login is rate-limited; display names drop phone numbers and links;
  userQuestion is capped at 2000 characters
- server-side heart enforcement exists behind HEARTS_ENFORCED (off until the
  frontend handles 403 no_hearts)

Not done on purpose: rotating the server's secret key and moving to Postgres.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-25 06:24:13 +03:30

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import re
from rest_framework import serializers
# لینک، آیدیِ شبکه‌ی اجتماعی، و هر رشته‌ی ۵ رقمی یا بیشتر (شماره‌ی تلفن با
# فاصله/خط‌تیره هم) — ارقامِ فارسی و عربی هم.
_CONTACT = re.compile(
r'(https?://\S+|www\.\S+|\S+\.(?:com|ir|org|net|me)\S*|@\w+'
r'|(?:[0-9۰-۹٠-٩][\s\-.]?){5,})',
re.IGNORECASE,
)
def clean_display_name(value: str) -> str:
return ' '.join(_CONTACT.sub(' ', value or '').split())[:30]
# ---- Request serializers ----
class GuestSessionRequestSerializer(serializers.Serializer):
type = serializers.ChoiceField(choices=['guest'])
deviceId = serializers.CharField(max_length=64)
class LoginRequestSerializer(serializers.Serializer):
phone = serializers.CharField(max_length=15)
otp = serializers.CharField(max_length=6)
class RefreshRequestSerializer(serializers.Serializer):
refreshToken = serializers.CharField()
class SetGradeRequestSerializer(serializers.Serializer):
gradeId = serializers.IntegerField()
def _jalali_year_now() -> int:
"""
سالِ جاریِ شمسی. تبدیلِ سن به سالِ تولد بدونِ این، سالِ میلادی می‌داد و
اعتبارسنجیِ birthYear (بازه‌ی ۱۳۰۰ تا ۱۵۰۰) ردش می‌کرد.
"""
from django.utils import timezone
today = timezone.localdate()
# فروردین ۱ برابرِ ۲۱ مارس است؛ پیش از آن هنوز سالِ شمسیِ قبلی است.
return today.year - 622 if (today.month, today.day) >= (3, 21) else today.year - 623
class UpdateProfileRequestSerializer(serializers.Serializer):
"""
ورودی PATCH /api/user/profile — همه‌ی فیلدها اختیاری‌اند و فقط همان‌هایی
که فرستاده شوند تغییر می‌کنند (partial update واقعی).
`phone` و `isGuest` عمداً اینجا نیستند: شماره فقط از مسیرِ OTP عوض
می‌شود و مهمان‌بودن را کاربر نباید بتواند خودش تغییر دهد.
"""
name = serializers.CharField(max_length=100, required=False, allow_blank=True)
avatar = serializers.CharField(max_length=100, required=False, allow_blank=True)
def validate_name(self, value):
"""
نام در جدولِ رتبه‌بندی به بچه‌های دیگر نشان داده می‌شود؛ شماره، لینک و
آیدی (راهِ تماس گرفتن با یک کودکِ غریبه) از آن حذف می‌شود. عمداً خطا
نمی‌دهد تا صفحه‌ی پروفایلِ اپ گیر نکند؛ فقط بقیه‌ی نام ذخیره می‌شود.
"""
return clean_display_name(value)
birthYear = serializers.IntegerField(required=False, allow_null=True,
min_value=1300, max_value=1500)
parentPhone = serializers.CharField(max_length=15, required=False, allow_blank=True)
bio = serializers.CharField(max_length=200, required=False, allow_blank=True)
# صفحه‌ی ثبت‌نامِ فرانت سن می‌پرسد، نه سالِ تولد. ذخیره‌سازی همچنان
# birthYear است چون کهنه نمی‌شود؛ این فقط ورودی را ترجمه می‌کند تا فرانت
# مجبور نباشد خودش تبدیل کند و دو طرف حسابِ متفاوت درنیاورند.
age = serializers.IntegerField(required=False, allow_null=True,
min_value=5, max_value=99, write_only=True)
def validate(self, attrs):
if not attrs:
raise serializers.ValidationError('حداقل یکی از فیلدها باید ارسال شود.')
age = attrs.pop('age', None)
if age is not None:
if attrs.get('birthYear') is not None:
raise serializers.ValidationError(
'یکی از age یا birthYear را بفرستید، نه هر دو را.',
)
attrs['birthYear'] = _jalali_year_now() - age
return attrs
class RequestOTPRequestSerializer(serializers.Serializer):
"""اپ کمکی برای گرفتن OTP (در سند اصلی نبود، برای تست‌پذیری Swagger اضافه شد)."""
phone = serializers.CharField(max_length=15)
# ---- Response serializers ----
class GuestSessionResponseSerializer(serializers.Serializer):
userId = serializers.CharField()
token = serializers.CharField()
refreshToken = serializers.CharField()
isNewUser = serializers.BooleanField()
isGuest = serializers.BooleanField()
class LoginResponseSerializer(serializers.Serializer):
userId = serializers.CharField()
token = serializers.CharField()
refreshToken = serializers.CharField()
class RefreshResponseSerializer(serializers.Serializer):
token = serializers.CharField()
refreshToken = serializers.CharField()
expiresIn = serializers.IntegerField()
class GradeSerializer(serializers.Serializer):
id = serializers.IntegerField()
title = serializers.CharField()
icon = serializers.CharField()
color = serializers.CharField()
class GradesListResponseSerializer(serializers.Serializer):
grades = GradeSerializer(many=True)
class SetGradeResponseSerializer(serializers.Serializer):
success = serializers.BooleanField()
gradeId = serializers.IntegerField()
class RequestOTPResponseSerializer(serializers.Serializer):
success = serializers.BooleanField()
devOtp = serializers.CharField()
note = serializers.CharField()
class ProfileResponseSerializer(serializers.Serializer):
"""پاسخ GET /api/user/profile — فقط داده‌ی لازم برای تب Profile اپ موبایل."""
userId = serializers.CharField()
phone = serializers.CharField(allow_null=True)
name = serializers.CharField()
avatar = serializers.CharField()
isGuest = serializers.BooleanField()
gradeId = serializers.IntegerField(allow_null=True)
birthYear = serializers.IntegerField(allow_null=True)
parentPhone = serializers.CharField()
bio = serializers.CharField()
class LogoutRequestSerializer(serializers.Serializer):
refreshToken = serializers.CharField(required=False, allow_blank=True)
class LogoutResponseSerializer(serializers.Serializer):
success = serializers.BooleanField()