feat(app): allow changing date and datetime format as a user setting

app/apps/common/utils/django.py

@@ -30,3 +30,132 @@ def django_to_python_datetime(django_format):
         python_format = python_format.replace(django_code, python_code)
 
     return python_format
+
+
+def django_to_airdatepicker_datetime(django_format):
+    format_map = {
+        # Time
+        "h": "h",  # Hour (12-hour)
+        "H": "H",  # Hour (24-hour)
+        "i": "m",  # Minutes
+        "A": "AA",  # AM/PM uppercase
+        "a": "aa",  # am/pm lowercase
+        "P": "h:mm AA",  # Localized time format (e.g., "2:30 PM")
+        # Date
+        "D": "E",  # Short weekday name
+        "l": "EEEE",  # Full weekday name
+        "j": "d",  # Day of month without leading zero
+        "d": "dd",  # Day of month with leading zero
+        "n": "M",  # Month without leading zero
+        "m": "MM",  # Month with leading zero
+        "M": "MMM",  # Short month name
+        "F": "MMMM",  # Full month name
+        "y": "yy",  # Year, 2 digits
+        "Y": "yyyy",  # Year, 4 digits
+    }
+
+    result = ""
+    i = 0
+    while i < len(django_format):
+        char = django_format[i]
+        if char == "\\":  # Handle escaped characters
+            if i + 1 < len(django_format):
+                result += django_format[i + 1]
+                i += 2
+            continue
+
+        if char in format_map:
+            result += format_map[char]
+        else:
+            result += char
+        i += 1
+
+    return result
+
+
+def django_to_airdatepicker_datetime_separated(django_format):
+    format_map = {
+        # Time formats
+        "h": "h",  # Hour (12-hour)
+        "H": "H",  # Hour (24-hour)
+        "i": "m",  # Minutes
+        "A": "AA",  # AM/PM uppercase
+        "a": "aa",  # am/pm lowercase
+        "P": "h:mm AA",  # Localized time format
+        # Date formats
+        "D": "E",  # Short weekday name
+        "l": "EEEE",  # Full weekday name
+        "j": "d",  # Day of month without leading zero
+        "d": "dd",  # Day of month with leading zero
+        "n": "M",  # Month without leading zero
+        "m": "MM",  # Month with leading zero
+        "M": "MMM",  # Short month name
+        "F": "MMMM",  # Full month name
+        "y": "yy",  # Year, 2 digits
+        "Y": "yyyy",  # Year, 4 digits
+    }
+
+    # Define which characters belong to time format
+    time_chars = {"h", "H", "i", "A", "a", "P"}
+    date_chars = {"D", "l", "j", "d", "n", "m", "M", "F", "y", "Y"}
+
+    date_parts = []
+    time_parts = []
+    current_part = []
+    is_time = False
+
+    i = 0
+    while i < len(django_format):
+        char = django_format[i]
+
+        if char == "\\":  # Handle escaped characters
+            if i + 1 < len(django_format):
+                current_part.append(django_format[i + 1])
+                i += 2
+            continue
+
+        if char in format_map:
+            if char in time_chars:
+                # If we were building a date part, save it and start a time part
+                if current_part and not is_time:
+                    date_parts.append("".join(current_part))
+                    current_part = []
+                is_time = True
+                current_part.append(format_map[char])
+            elif char in date_chars:
+                # If we were building a time part, save it and start a date part
+                if current_part and is_time:
+                    time_parts.append("".join(current_part))
+                    current_part = []
+                is_time = False
+                current_part.append(format_map[char])
+        else:
+            # Handle separators
+            if char in "/:.-":
+                current_part.append(char)
+            elif char == " ":
+                if current_part:
+                    if is_time:
+                        time_parts.append("".join(current_part))
+                    else:
+                        date_parts.append("".join(current_part))
+                    current_part = []
+                current_part.append(char)
+
+        i += 1
+
+    # Don't forget the last part
+    if current_part:
+        if is_time:
+            time_parts.append("".join(current_part))
+        else:
+            date_parts.append("".join(current_part))
+
+    date_format = "".join(date_parts)
+    time_format = "".join(time_parts)
+
+    # Clean up multiple spaces while preserving necessary ones
+    date_format = " ".join(filter(None, date_format.split()))
+    time_format = " ".join(filter(None, time_format.split()))
+
+    return date_format, time_format