Complete backend-python to be a full mirror of backend-node

[Copilot]

backend-python had data-loss bugs, missing endpoints, and no input validation — diverging significantly from the Node.js reference implementation.

Critical bugs fixed

• process_debit never persisted — missing conn.commit() silently discarded every debit
• recalculate_pending_boxes never persisted — same missing commit
• NameError crash on POST /distribution — datetime used but not imported
• App refused to start without .env — admin_token/secret_key had no defaults

Schema auto-initialization

get_db_connection() now creates all tables/views on first call, matching Node.js getDb() behavior. manage.py still works but is no longer required.

Missing features

utils.py — parse_positive_int / parse_non_negative_int: safe parsers that reject booleans, floats, negatives, and non-numeric strings (mirrors utils.js)

comanda_service.py

• max_comandas enforced (MaxComandasReachedError)
• DuplicateCodeError on concurrent code collision via sqlite3.IntegrityError
• Zero initial_balance no longer inserts a phantom credit event

box_service.py — claim_box replaced SELECT→UPDATE pattern with a single atomic UPDATE … WHERE responsible_name IS NULL AND status = 'pending' to eliminate the race condition

ws_admin.py + ws_store.py

• Rate limiting: 300 msg/min per connection (STRESS_NO_RATELIMIT=true to bypass)
• Max connection limits via MAX_ADMIN_CONNECTIONS / MAX_STORE_CONNECTIONS env vars
• Auth checked before adding socket to active pool
• All inputs validated with parse_positive_int / parse_non_negative_int
• ws_store: tracks store_id per connection; disconnect_store_by_id() closes sockets on token revocation
• ws_admin: maybeFlagRecalc called after cart-item changes

rest.py

• PUT /distribution/:id/activate now archives the previously active distribution
• DELETE /distribution/:id added (was missing entirely)
• POST /stores/:id/revoke_token disconnects active WebSocket sessions
• POST /stores and POST /categories return 201
• Name/price validation on store and category creation

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Project	Deployment	Actions	Updated (UTC)
feira-da-troca	Ready	Preview, Comment	Apr 5, 2026 3:46am
feira-da-troca-ba9e	Ready	Preview, Comment	Apr 5, 2026 3:46am