From 2f2a1113e1acd5ede5d3966b9c42a7f479704811 Mon Sep 17 00:00:00 2001
From: Nao Ueda <nao.uedder@gmail.com>
Date: Tue, 5 Jan 2021 18:11:55 +0900
Subject: move a function and rename it.

---
 ppad/lib/util.py | 33 ++++++++++++++++++++++++++++++++-
 1 file changed, 32 insertions(+), 1 deletion(-)

(limited to 'ppad/lib/util.py')

diff --git a/ppad/lib/util.py b/ppad/lib/util.py
index e857389..0a97141 100644
--- a/ppad/lib/util.py
+++ b/ppad/lib/util.py
@@ -4,7 +4,7 @@ import pytz
 import time
 
 
-def date_parse(date: str) -> datetime:
+def parse_date(date: str) -> datetime:
     dt = parser.isoparse(date)
 
     if dt.tzinfo is not None:
@@ -12,3 +12,34 @@ def date_parse(date: str) -> datetime:
 
     default_tz = pytz.timezone(time.tzname[time.daylight])
     return default_tz.localize(dt)
+
+
+def parse_argv(argv: list[str]) -> tuple[datetime, datetime]:
+    if len(argv) == 1:
+        return None, None
+
+    date_to: datetime = None
+    date_from: datetime = None
+    from_str: str
+    to_str: str
+
+    span = argv[1].split('~')
+    if len(span) == 1:
+        from_str = to_str = span[0]
+    else:
+        [from_str, to_str, *_] = span
+
+    if from_str:
+        date_from = parse_date(from_str)
+
+    if to_str:
+        date_to = parse_date(to_str)
+
+    if date_from is None and date_to is None:
+        # probably `argv` would be only character '~'
+        return None, None
+
+    if date_from == date_to:
+        date_to = date_to + datetime.timedelta(days=1)
+
+    return date_from, date_to
-- 
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