From 718b2565a2a802e4a8607ed341331f2205a33ddc Mon Sep 17 00:00:00 2001
From: Conatum <cona@thewisewolf.dev>
Date: Sun, 14 May 2023 12:28:07 +0300
Subject: [PATCH] rewrite: replace_multiple and update Timezoned.

---
 src/utils/lib.py | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/src/utils/lib.py b/src/utils/lib.py
index aa0afc4c..3cb52aab 100644
--- a/src/utils/lib.py
+++ b/src/utils/lib.py
@@ -738,3 +738,34 @@ class Timezoned:
         """
         now = self.now
         return now.replace(hour=0, minute=0, second=0, microsecond=0)
+
+    @property
+    def week_start(self):
+        """
+        Return the start of the week in the object's timezone
+        """
+        today = self.today
+        return today - datetime.timedelta(days=today.weekday())
+
+    @property
+    def month_start(self):
+        """
+        Return the start of the current month in the object's timezone
+        """
+        today = self.today
+        return today - datetime.timedelta(days=today.day)
+
+
+def replace_multiple(format_string, mapping):
+    """
+    Subsistutes the keys from the format_dict with their corresponding values.
+
+    Substitution is non-chained, and done in a single pass via regex.
+    """
+    if not mapping:
+        raise ValueError("Empty mapping passed.")
+
+    keys = list(mapping.keys())
+    pattern = '|'.join(f"({key})" for key in keys)
+    string = re.sub(pattern, lambda match: str(mapping[keys[match.lastindex - 1]]), format_string)
+    return string