Fringg
8375d7ecc5
- Multi-channel subscription enforcement via middleware, events, and cabinet API - 3-layer cache architecture: Redis -> PostgreSQL -> rate-limited Telegram API - ChatMemberUpdated event-driven tracking with automatic VPN access control - Admin management via bot FSM handler and REST API with full CRUD - Channel ID normalization: @username resolved to numeric ID at creation time - Fail-closed error handling: API errors deny access (security-first) - Background reconciliation with keyset pagination (100 per batch) - Per-user rate limiting on subscription check button (5s cooldown) - Redis connection pooling via cache singleton (no per-request connections) - Database: channel_id index, multi-row upsert optimization - Localization: en, ru, zh, fa, ua translations for all new strings - Frontend blocking UI with channel list and subscription status - Admin channel management page with toggle, delete, and create
62 lines
2.3 KiB
Python
62 lines
2.3 KiB
Python
"""add required_channels and user_channel_subscriptions tables
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Revision ID: 0008
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Revises: 0007
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Create Date: 2026-02-24
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"""
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from typing import Sequence, Union
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import sqlalchemy as sa
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from alembic import op
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revision: str = '0008'
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down_revision: Union[str, None] = '0007'
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branch_labels: Union[str, Sequence[str], None] = None
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depends_on: Union[str, Sequence[str], None] = None
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def _has_table(table_name: str) -> bool:
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"""Check if table already exists (idempotency guard)."""
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conn = op.get_bind()
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result = conn.execute(
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sa.text(
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'SELECT EXISTS (SELECT 1 FROM information_schema.tables '
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"WHERE table_schema = 'public' AND table_name = :name)"
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),
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{'name': table_name},
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)
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return result.scalar()
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def upgrade() -> None:
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if not _has_table('required_channels'):
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op.create_table(
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'required_channels',
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sa.Column('id', sa.Integer(), primary_key=True, autoincrement=True),
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sa.Column('channel_id', sa.String(100), unique=True, nullable=False),
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sa.Column('channel_link', sa.String(500), nullable=True),
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sa.Column('title', sa.String(255), nullable=True),
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sa.Column('is_active', sa.Boolean(), nullable=False, server_default='true'),
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sa.Column('sort_order', sa.Integer(), nullable=False, server_default='0'),
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sa.Column('created_at', sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()),
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sa.Column('updated_at', sa.DateTime(timezone=True), nullable=True),
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)
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if not _has_table('user_channel_subscriptions'):
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op.create_table(
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'user_channel_subscriptions',
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sa.Column('id', sa.Integer(), primary_key=True, autoincrement=True),
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sa.Column('telegram_id', sa.BigInteger(), nullable=False),
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sa.Column('channel_id', sa.String(100), nullable=False),
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sa.Column('is_member', sa.Boolean(), nullable=False, server_default='false'),
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sa.Column('checked_at', sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()),
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sa.UniqueConstraint('telegram_id', 'channel_id', name='uq_user_channel_sub'),
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sa.Index('ix_user_channel_sub_telegram_id', 'telegram_id'),
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)
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def downgrade() -> None:
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op.drop_table('user_channel_subscriptions')
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op.drop_table('required_channels')
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