110 lines
3.2 KiB
Python
Executable File
110 lines
3.2 KiB
Python
Executable File
"""
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Shared batch number generator utility
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"""
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from datetime import datetime
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from typing import Optional, Protocol, Dict, Any
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from sqlalchemy.ext.asyncio import AsyncSession
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import structlog
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logger = structlog.get_logger()
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class BatchCountProvider(Protocol):
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"""Protocol for providing batch counts for a specific tenant and date range"""
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async def get_daily_batch_count(
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self,
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tenant_id: str,
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date_start: datetime,
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date_end: datetime,
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prefix: Optional[str] = None
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) -> int:
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"""Get the count of batches created today for the given tenant"""
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...
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class BatchNumberGenerator:
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"""Generates unique batch numbers across different services"""
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def __init__(self, batch_provider: BatchCountProvider):
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self.batch_provider = batch_provider
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async def generate_batch_number(
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self,
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tenant_id: str,
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prefix: str = "BATCH",
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date: Optional[datetime] = None
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) -> str:
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"""
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Generate a unique batch number with format: {PREFIX}-{YYYYMMDD}-{XXX}
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Args:
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tenant_id: The tenant ID
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prefix: Prefix for the batch number (e.g., "INV", "PROD", "BATCH")
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date: Date to use for the batch number (defaults to today)
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Returns:
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Unique batch number string
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"""
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try:
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# Use provided date or current date
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target_date = date or datetime.utcnow()
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date_prefix = target_date.strftime("%Y%m%d")
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# Calculate date range for the day
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today_start = datetime.combine(target_date.date(), datetime.min.time())
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today_end = datetime.combine(target_date.date(), datetime.max.time())
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# Get count of batches created today with this prefix
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daily_count = await self.batch_provider.get_daily_batch_count(
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tenant_id=tenant_id,
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date_start=today_start,
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date_end=today_end,
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prefix=prefix
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)
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# Generate sequential number (starting from 1)
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sequence = daily_count + 1
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batch_number = f"{prefix}-{date_prefix}-{sequence:03d}"
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logger.info(
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"Generated batch number",
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tenant_id=tenant_id,
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prefix=prefix,
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date=target_date.date(),
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sequence=sequence,
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batch_number=batch_number
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)
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return batch_number
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except Exception as e:
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logger.error(
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"Failed to generate batch number",
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tenant_id=tenant_id,
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prefix=prefix,
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error=str(e)
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)
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raise
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def create_fallback_batch_number(
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prefix: str = "BATCH",
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date: Optional[datetime] = None,
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sequence: int = 1
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) -> str:
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"""
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Create a fallback batch number when database access fails
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Args:
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prefix: Prefix for the batch number
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date: Date to use (defaults to now)
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sequence: Sequence number to use
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Returns:
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Fallback batch number string
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"""
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target_date = date or datetime.utcnow()
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date_prefix = target_date.strftime("%Y%m%d")
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return f"{prefix}-{date_prefix}-{sequence:03d}" |