Time/Date: accept different formats for date, YYYY-MM-DD [HH:MM[:SS]], DD-MM-YYYY [HH:MM[:SS]] and DD/MM/YYYY [HH:MM[:SS]], convert it to classic one used by pamhyr, and prevent user when he's using a wrong one

src/View/BoundaryCondition/Edit/Table.py

@@ -24,7 +24,7 @@ from datetime import date, time, datetime, timedelta
 from tools import (
     trace, timer,
     timestamp_to_old_pamhyr_date,
-    old_pamhyr_date_to_timestamp
+    old_pamhyr_date_to_timestamp, format_datetime
 )
 
 from View.Tools.PamhyrTable import PamhyrTableModel
@@ -97,7 +97,7 @@ class TableModel(PamhyrTableModel):
                 if self._opt_data == "time":
                     value = timestamp_to_old_pamhyr_date(int(v))
                 else:
-                    value = str(
+                    value = format_datetime(
                         self._start_date + timedelta(seconds=float(v))
                     )
             else:

src/View/BoundaryConditionsAdisTS/Edit/Table.py

@@ -24,7 +24,7 @@ from datetime import date, time, datetime, timedelta
 from tools import (
     trace, timer,
     timestamp_to_old_pamhyr_date,
-    old_pamhyr_date_to_timestamp
+    old_pamhyr_date_to_timestamp, format_datetime
 )
 
 from View.Tools.PamhyrTable import PamhyrTableModel
@@ -87,7 +87,7 @@ class TableModel(PamhyrTableModel):
                 if self._opt_data == "time":
                     value = timestamp_to_old_pamhyr_date(int(v))
                 else:
-                    value = str(
+                    value = format_datetime(
                         self._start_date + timedelta(seconds=float(v))
                     )
             else:

src/View/BoundaryConditionsTemperature/Edit/Table.py

@@ -24,7 +24,7 @@ from datetime import date, time, datetime, timedelta
 from tools import (
     trace, timer,
     timestamp_to_old_pamhyr_date,
-    old_pamhyr_date_to_timestamp
+    old_pamhyr_date_to_timestamp, format_datetime
 )
 
 from View.Tools.PamhyrTable import PamhyrTableModel
@@ -87,7 +87,7 @@ class TableModel(PamhyrTableModel):
                 if self._opt_data == "time":
                     value = timestamp_to_old_pamhyr_date(int(v))
                 else:
-                    value = str(
+                    value = format_datetime(
                         self._start_date + timedelta(seconds=float(v))
                     )
             else:

src/View/LateralContribution/Edit/Table.py

@@ -23,7 +23,7 @@ from datetime import date, time, datetime, timedelta
 from tools import (
     trace, timer,
     timestamp_to_old_pamhyr_date,
-    old_pamhyr_date_to_timestamp
+    old_pamhyr_date_to_timestamp, format_datetime
 )
 
 from View.Tools.PamhyrTable import PamhyrTableModel
@@ -76,7 +76,7 @@ class TableModel(PamhyrTableModel):
                 if self._opt_data == "time":
                     value = timestamp_to_old_pamhyr_date(int(v))
                 else:
-                    value = str(
+                    value = format_datetime(
                         self._start_date + timedelta(seconds=float(v))
                     )
             else:

src/View/LateralContributionsAdisTS/Edit/Table.py

@@ -24,7 +24,7 @@ from tools import (
     trace, timer,
     timestamp_to_old_pamhyr_date,
     old_pamhyr_date_to_timestamp,
-    timestamp_to_old_pamhyr_date_adists
+    timestamp_to_old_pamhyr_date_adists, format_datetime
 )
 
 from View.Tools.PamhyrTable import PamhyrTableModel
@@ -90,7 +90,7 @@ class TableModel(PamhyrTableModel):
                 if self._opt_data == "time":
                     value = timestamp_to_old_pamhyr_date_adists(int(v))
                 else:
-                    value = str(
+                    value = format_datetime(
                         self._start_date + timedelta(seconds=float(v))
                     )
             else:

src/View/Tools/PamhyrTable.py

@@ -19,9 +19,7 @@
 import logging
 import traceback
 
-from datetime import datetime
-
-from tools import trace, timer
+from tools import trace, timer, parse_datetime
 
 from Model.Except import NotImplementedMethodeError
 
@@ -36,8 +34,11 @@ from PyQt5.QtWidgets import (
     QFileDialog, QTableView, QAbstractItemView,
     QUndoStack, QShortcut, QAction, QItemDelegate,
     QComboBox, QStyledItemDelegate, QHeaderView,
+    QMessageBox,
 )
 
+_translate = QCoreApplication.translate
+
 logger = logging.getLogger()
 
 
@@ -63,9 +64,22 @@ class PamhyrTextDelegate(QStyledItemDelegate):
 class PamhyrTableModel(QAbstractTableModel):
     def date_to_elapsed_seconds(self, value):
         """Convert an entered date to seconds since the study start date."""
-        entered_date = value
-        if not isinstance(entered_date, datetime):
-            entered_date = datetime.fromisoformat(str(value).strip())
+        try:
+            entered_date = parse_datetime(value)
+        except ValueError as error:
+            QMessageBox.warning(
+                self._table_view,
+                _translate("PamhyrTableModel", "Invalid date/time"),
+                _translate(
+                    "PamhyrTableModel",
+                    "The entered date/time is invalid.\n"
+                    "Expected formats:\n"
+                    "YYYY-MM-DD [HH:MM[:SS]],\n"
+                    "DD-MM-YYYY [HH:MM[:SS]] or\n"
+                    "DD/MM/YYYY [HH:MM[:SS]]."
+                )
+            )
+            raise error
 
         return (entered_date - self._start_date).total_seconds()
 

src/View/WeatherParameters/Edit/Table.py

@@ -23,7 +23,7 @@ from datetime import date, time, datetime, timedelta
 from tools import (
     trace, timer,
     timestamp_to_old_pamhyr_date,
-    old_pamhyr_date_to_timestamp
+    old_pamhyr_date_to_timestamp, format_datetime
 )
 
 from View.Tools.PamhyrTable import PamhyrTableModel
@@ -77,7 +77,7 @@ class TableModel(PamhyrTableModel):
                 if self._opt_data == "time":
                     value = timestamp_to_old_pamhyr_date(int(v))
                 else:
-                    value = str(
+                    value = format_datetime(
                         self._start_date + timedelta(seconds=float(v))
                     )
             else:

src/tools.py

@@ -22,7 +22,7 @@ import logging
 import sqlite3
 import traceback
 
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, timezone
 from pathlib import Path
 
 from colorama import Fore
@@ -239,6 +239,57 @@ def timestamp(dt: datetime):
     return dt.timestamp()
 
 
+SUPPORTED_DATETIME_FORMATS = (
+    "%d-%m-%Y %H:%M:%S.%f",
+    "%d-%m-%Y %H:%M:%S",
+    "%d-%m-%Y %H:%M",
+    "%d-%m-%Y",
+    "%d/%m/%Y %H:%M:%S.%f",
+    "%d/%m/%Y %H:%M:%S",
+    "%d/%m/%Y %H:%M",
+    "%d/%m/%Y",
+    "%d-%m-%y %H:%M:%S",
+    "%d/%m/%y %H:%M:%S",
+)
+
+
+def parse_datetime(value):
+    """Parse a supported date representation into a naive UTC datetime."""
+    if isinstance(value, datetime):
+        parsed = value
+    else:
+        text = str(value).strip()
+        if text.endswith(("Z", "z")):
+            text = text[:-1] + "+00:00"
+
+        try:
+            parsed = datetime.fromisoformat(text)
+        except ValueError as iso_error:
+            for date_format in SUPPORTED_DATETIME_FORMATS:
+                try:
+                    parsed = datetime.strptime(text, date_format)
+                    break
+                except ValueError:
+                    continue
+            else:
+                raise ValueError(
+                    f"Unsupported date format: {value!r}. Expected an ISO "
+                    "date/time or one of: "
+                    + ", ".join(SUPPORTED_DATETIME_FORMATS)
+                ) from iso_error
+
+    # If the parsed datetime has timezone information, convert it to UTC and remove the timezone info
+    if parsed.tzinfo is not None:
+        parsed = parsed.astimezone(timezone.utc).replace(tzinfo=None)
+
+    return parsed
+
+
+def format_datetime(value):
+    """Return a datetime using the canonical application format."""
+    return parse_datetime(value).strftime("%Y-%m-%d %H:%M:%S")
+
+
 def date_iso_to_timestamp(date: str):
     if type(date) is str:
         return timestamp(datetime.fromisoformat(date))