feat: 新增CronUtil工具类

ruoyi-fastapi-backend/utils/cron_util.py

@@ -0,0 +1,172 @@
+import re
+from datetime import datetime
+
+
+class CronUtil:
+    """
+    Cron表达式工具类
+    """
+
+    @classmethod
+    def __valid_range(cls, search_str: str, start_range: int, end_range: int):
+        match = re.match(r'^(\d+)-(\d+)$', search_str)
+        if match:
+            start, end = int(match.group(1)), int(match.group(2))
+            return start_range <= start < end <= end_range
+        return False
+
+    @classmethod
+    def __valid_sum(
+        cls, search_str: str, start_range_a: int, start_range_b: int, end_range_a: int, end_range_b: int, sum_range: int
+    ):
+        match = re.match(r'^(\d+)/(\d+)$', search_str)
+        if match:
+            start, end = int(match.group(1)), int(match.group(2))
+            return (
+                start_range_a <= start <= start_range_b
+                and end_range_a <= end <= end_range_b
+                and start + end <= sum_range
+            )
+        return False
+
+    @classmethod
+    def validate_second_or_minute(cls, second_or_minute: str):
+        """
+        校验秒或分钟值是否正确
+
+        :param second_or_minute: 秒或分钟值
+        :return: 校验结果
+        """
+        if (
+            second_or_minute == '*'
+            or ('-' in second_or_minute and cls.__valid_range(second_or_minute, 0, 59))
+            or ('/' in second_or_minute and cls.__valid_sum(second_or_minute, 0, 58, 1, 59))
+            or re.match(r'^(?:[0-5]?\d|59)(?:,[0-5]?\d|59)*$', second_or_minute)
+        ):
+            return True
+        return False
+
+    @classmethod
+    def validate_hour(cls, hour: str):
+        """
+        校验小时值是否正确
+
+        :param hour: 小时值
+        :return: 校验结果
+        """
+        if (
+            hour == '*'
+            or ('-' in hour and cls.__valid_range(hour, 0, 23))
+            or ('/' in hour and cls.__valid_sum(hour, 0, 22, 1, 23, 23))
+            or re.match(r'^(?:0|[1-9]|1\d|2[0-3])(?:,(?:0|[1-9]|1\d|2[0-3]))*$', hour)
+        ):
+            return True
+        return False
+
+    @classmethod
+    def validate_day(cls, day: str):
+        """
+        校验日值是否正确
+
+        :param day: 日值
+        :return: 校验结果
+        """
+        if (
+            day in ['*', '?', 'L']
+            or ('-' in day and cls.__valid_range(day, 1, 31))
+            or ('/' in day and cls.__valid_sum(day, 1, 30, 1, 30, 31))
+            or ('W' in day and re.match(r'^(?:[1-9]|1\d|2\d|3[01])W$', day))
+            or re.match(r'^(?:0|[1-9]|1\d|2[0-9]|3[0-1])(?:,(?:0|[1-9]|1\d|2[0-9]|3[0-1]))*$', day)
+        ):
+            return True
+        return False
+
+    @classmethod
+    def validate_month(cls, month: str):
+        """
+        校验月值是否正确
+
+        :param month: 月值
+        :return: 校验结果
+        """
+        if (
+            month == '*'
+            or ('-' in month and cls.__valid_range(month, 1, 12))
+            or ('/' in month and cls.__valid_sum(month, 1, 11, 1, 11, 12))
+            or re.match(r'^(?:0|[1-9]|1[0-2])(?:,(?:0|[1-9]|1[0-2]))*$', month)
+        ):
+            return True
+        return False
+
+    @classmethod
+    def validate_week(cls, week: str):
+        """
+        校验周值是否正确
+
+        :param week: 周值
+        :return: 校验结果
+        """
+        if (
+            week in ['*', '?']
+            or ('-' in week and cls.__valid_range(week, 1, 7))
+            or re.match(r'^[1-7]#[1-4]$', week)
+            or re.match(r'^[1-7]L$', week)
+            or re.match(r'^[1-7](?:(,[1-7]))*$', week)
+        ):
+            return True
+        return False
+
+    @classmethod
+    def validate_year(cls, year: str):
+        """
+        校验年值是否正确
+
+        :param year: 年值
+        :return: 校验结果
+        """
+        current_year = int(datetime.now().year)
+        future_years = [current_year + i for i in range(9)]
+        if (
+            year == '*'
+            or ('-' in year and cls.__valid_range(year, current_year, 2099))
+            or ('/' in year and cls.__valid_sum(year, current_year, 2098, 1, 2099 - current_year, 2099))
+            or re.match(r'^[1-7]#[1-4]$', year)
+            or re.match(r'^[1-7]L$', year)
+            or (
+                (len(year) == 4 or ',' in year)
+                and all(int(item) in future_years and current_year <= int(item) <= 2099 for item in year.split(','))
+            )
+        ):
+            return True
+        return False
+
+    @classmethod
+    def validate_cron_expression(cls, cron_expression: str):
+        """
+        校验Cron表达式是否正确
+
+        :param cron_expression: Cron表达式
+        :return: 校验结果
+        """
+        values = cron_expression.split()
+        if len(values) != 6 and len(values) != 7:
+            return False
+        second_validation = cls.validate_second_or_minute(values[0])
+        minute_validation = cls.validate_second_or_minute(values[1])
+        hour_validation = cls.validate_hour(values[2])
+        day_validation = cls.validate_day(values[3])
+        month_validation = cls.validate_month(values[4])
+        week_validation = cls.validate_week(values[5])
+        validation = (
+            second_validation
+            and minute_validation
+            and hour_validation
+            and day_validation
+            and month_validation
+            and week_validation
+        )
+        if len(values) == 6:
+            return validation
+        if len(values) == 7:
+            year_validation = cls.validate_year(values[6])
+            return validation and year_validation