feat(app/view): add tag routing

weather/app/route/util.py

@@ -0,0 +1,57 @@
+import datetime
+from enum import Enum
+from typing import NamedTuple, Optional
+
+
+class TagType(str, Enum):
+    DAY = "day"
+    DAYS = "days"
+
+
+class Tag(NamedTuple):
+    type: TagType
+    date: datetime.date
+    days: int = 1
+
+    def __str__(self) -> str:
+        if self.type == TagType.DAY:
+            today = datetime.date.today()
+            day = (self.date - today).days
+            return f"day-{day}"
+        elif self.type == TagType.DAYS:
+            return f"days-{self.days}"
+        else:
+            raise ValueError(self.type)
+
+
+class TagUtil:
+    @classmethod
+    def parse_tag(cls, tag: str) -> Tag:
+        if tag == "today":
+            return Tag(TagType.DAY, datetime.date.today())
+        elif tag == "tomorrow":
+            return Tag(TagType.DAY, datetime.date.today() + datetime.timedelta(days=1))
+        elif tag.startswith("day-"):
+            days = int(tag.split("-")[-1])
+            return Tag(
+                TagType.DAY,
+                datetime.date.today() + datetime.timedelta(days=days),
+            )
+        elif tag.startswith("days-"):
+            days = int(tag.split("-")[-1])
+            return Tag(TagType.DAYS, datetime.date.today(), days)
+        raise ValueError(tag)
+
+    @classmethod
+    def create_tag(
+        cls,
+        tag_type: TagType,
+        date: datetime.date,
+        day: int = 0,
+        days: int = 10,
+    ) -> Tag:
+        if tag_type == TagType.DAY:
+            return Tag(tag_type, date + datetime.timedelta(days=day))
+        if tag_type == TagType.DAYS:
+            return Tag(tag_type, date, days)
+        raise ValueError(tag_type)