| 1 | from datetime import datetime, timedelta |
| 2 | |
| 1 | 3 | def delivery_date(start: str, description: str) -> str: |
| 2 | | pass |
| 4 | # Edge Case: Invalid start time format |
| 5 | try: |
| 6 | meeting_start = datetime.strptime(start, "%Y-%m-%d %H:%M") |
| 7 | except ValueError: |
| 8 | raise ValueError("Invalid start time format. Expected format: YYYY-MM-DD HH:MM") |
| 9 | |
| 10 | # Edge Case: NOW description |
| 11 | if description == "NOW": |
| 12 | delivery = meeting_start + timedelta(hours=2) |
| 13 | return delivery.strftime("%Y-%m-%d %H:%M") |
| 14 | |
| 15 | # Edge Case: ASAP description |
| 16 | if description == "ASAP": |
| 17 | if meeting_start.hour < 13: |
| 18 | delivery = meeting_start.replace(hour=17, minute=0) |
| 19 | return delivery.strftime("%Y-%m-%d %H:%M") |
| 20 | else: |
| 21 | # Next day at 13:00 |
| 22 | next_day = meeting_start + timedelta(days=1) |
| 23 | delivery = next_day.replace(hour=13, minute=0) |
| 24 | return delivery.strftime("%Y-%m-%d %H:%M") |
| 25 | |
| 26 | # Edge Case: EOW description |
| 27 | if description == "EOW": |
| 28 | weekday = meeting_start.weekday() # Monday is 0, Sunday is 6 |
| 29 | if weekday in [0, 1, 2]: # Monday, Tuesday, or Wednesday |
| 30 | # Find next Friday (weekday 4) |
| 31 | days_ahead = 4 - weekday |
| 32 | delivery_date = meeting_start + timedelta(days=days_ahead) |
| 33 | delivery = delivery_date.replace(hour=17, minute=0) |
| 34 | return delivery.strftime("%Y-%m-%d %H:%M") |
| 35 | elif weekday in [3, 4]: # Thursday or Friday |
| 36 | # Find next Sunday (weekday 6) |
| 37 | days_ahead = (6 - weekday) % 7 |
| 38 | if days_ahead == 0: # If it's Sunday, go to next Sunday |
| 39 | days_ahead = 7 |
| 40 | delivery_date = meeting_start + timedelta(days=days_ahead) |
| 41 | delivery = delivery_date.replace(hour=20, minute=0) |
| 42 | return delivery.strftime("%Y-%m-%d %H:%M") |
| 43 | else: # Saturday or Sunday |
| 44 | # For Saturday, find next Sunday |
| 45 | # For Sunday, find next Sunday (which is in 7 days) |
| 46 | days_ahead = (6 - weekday) % 7 |
| 47 | if days_ahead == 0: |
| 48 | days_ahead = 7 |
| 49 | delivery_date = meeting_start + timedelta(days=days_ahead) |
| 50 | delivery = delivery_date.replace(hour=20, minute=0) |
| 51 | return delivery.strftime("%Y-%m-%d %H:%M") |
| 52 | |
| 53 | # Edge Case: <N>M pattern |
| 54 | if description.endswith('M') and description[:-1].isdigit(): |
| 55 | n = int(description[:-1]) |
| 56 | if not (1 <= n <= 12): |
| 57 | raise ValueError("Month must be between 1 and 12") |
| 58 | |
| 59 | current_year = meeting_start.year |
| 60 | target_month = n |
| 61 | |
| 62 | # Check if we're before N-th month (this year) or after/in N-th month (next year) |
| 63 | if meeting_start.month < target_month: |
| 64 | target_year = current_year |
| 65 | else: |
| 66 | target_year = current_year + 1 |
| 67 | |
| 68 | # First day of target month at 8:00 |
| 69 | first_day = datetime(target_year, target_month, 1, 8, 0) |
| 70 | |
| 71 | # Find first workday |
| 72 | while first_day.weekday() >= 5: # Saturday is 5, Sunday is 6 |
| 73 | first_day += timedelta(days=1) |
| 74 | |
| 75 | return first_day.strftime("%Y-%m-%d %H:%M") |
| 76 | |
| 77 | # Edge Case: Q<N> pattern |
| 78 | if description.startswith('Q') and description[1:].isdigit(): |
| 79 | n = int(description[1:]) |
| 80 | if not (1 <= n <= 4): |
| 81 | raise ValueError("Quarter must be between 1 and 4") |
| 82 | |
| 83 | current_year = meeting_start.year |
| 84 | |
| 85 | # Determine quarter end months: Q1=Mar, Q2=Jun, Q3=Sep, Q4=Dec |
| 86 | quarter_end_months = [3, 6, 9, 12] |
| 87 | target_month = quarter_end_months[n-1] |
| 88 | |
| 89 | # Check if we're before or in the N-th quarter |
| 90 | # A quarter ends at the end of its last month |
| 91 | if meeting_start.month <= target_month: |
| 92 | target_year = current_year |
| 93 | else: |
| 94 | target_year = current_year + 1 |
| 95 | |
| 96 | # Last day of target month at 8:00 |
| 97 | # Find the last day of the month |
| 98 | if target_month in [1, 3, 5, 7, 8, 10, 12]: |
| 99 | last_day = 31 |
| 100 | elif target_month in [4, 6, 9, 11]: |
| 101 | last_day = 30 |
| 102 | else: # February |
| 103 | if (target_year % 4 == 0 and target_year % 100 != 0) or (target_year % 400 == 0): |
| 104 | last_day = 29 |
| 105 | else: |
| 106 | last_day = 28 |
| 107 | |
| 108 | last_day_date = datetime(target_year, target_month, last_day, 8, 0) |
| 109 | |
| 110 | # Find last workday (going backwards) |
| 111 | while last_day_date.weekday() >= 5: # Saturday is 5, Sunday is 6 |
| 112 | last_day_date -= timedelta(days=1) |
| 113 | |
| 114 | return last_day_date.strftime("%Y-%m-%d %H:%M") |
| 115 | |
| 116 | # Edge Case: Unrecognized description |
| 117 | raise ValueError(f"Unrecognized delivery description: {description}") |
| 118 | |
| 119 | # Handled Edge Cases: Invalid start time format, NOW description, ASAP description with times before and after 13:00, EOW description for all days of the week, <N>M pattern with valid and invalid month numbers, Q<N> pattern with valid and invalid quarter numbers, Unrecognized description |