Implement date uniqueness validation in DataManager and update MedTrackerApp for duplicate checks

scripts/test_date_uniqueness.py

@@ -0,0 +1,91 @@
+#!/usr/bin/env python3
+"""
+Test script to verify date uniqueness functionality in TheChart app.
+"""
+
+import logging
+import os
+import sys
+
+# Add the src directory to the Python path
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), "src"))
+
+from data_manager import DataManager
+
+# Set up simple logging
+logging.basicConfig(level=logging.DEBUG)
+logger = logging.getLogger("test")
+
+
+def test_date_uniqueness():
+    """Test the date uniqueness validation."""
+    print("Testing date uniqueness functionality...")
+
+    # Create a test data manager with a test file
+    test_filename = "test_data.csv"
+    dm = DataManager(test_filename, logger)
+
+    # Test 1: Add first entry (should succeed)
+    print("\n1. Adding first entry...")
+    entry1 = ["2025-07-28", 5, 5, 5, 5, 0, 0, 0, 0, "First entry"]
+    result1 = dm.add_entry(entry1)
+    print(f"Result: {result1} (Expected: True)")
+
+    # Test 2: Try to add duplicate date (should fail)
+    print("\n2. Trying to add duplicate date...")
+    entry2 = ["2025-07-28", 3, 3, 3, 3, 1, 1, 1, 1, "Duplicate entry"]
+    result2 = dm.add_entry(entry2)
+    print(f"Result: {result2} (Expected: False)")
+
+    # Test 3: Add different date (should succeed)
+    print("\n3. Adding different date...")
+    entry3 = ["2025-07-29", 4, 4, 4, 4, 0, 0, 0, 0, "Second entry"]
+    result3 = dm.add_entry(entry3)
+    print(f"Result: {result3} (Expected: True)")
+
+    # Test 4: Update entry with same date (should succeed)
+    print("\n4. Updating entry with same date...")
+    updated_entry = ["2025-07-28", 6, 6, 6, 6, 1, 1, 1, 1, "Updated entry"]
+    result4 = dm.update_entry("2025-07-28", updated_entry)
+    print(f"Result: {result4} (Expected: True)")
+
+    # Test 5: Try to update entry to existing date (should fail)
+    print("\n5. Trying to update entry to existing date...")
+    conflicting_entry = ["2025-07-29", 7, 7, 7, 7, 1, 1, 1, 1, "Conflicting entry"]
+    result5 = dm.update_entry("2025-07-28", conflicting_entry)
+    print(f"Result: {result5} (Expected: False)")
+
+    # Test 6: Update entry to new date (should succeed)
+    print("\n6. Updating entry to new date...")
+    new_date_entry = ["2025-07-30", 8, 8, 8, 8, 1, 1, 1, 1, "New date entry"]
+    result6 = dm.update_entry("2025-07-28", new_date_entry)
+    print(f"Result: {result6} (Expected: True)")
+
+    # Cleanup
+    if os.path.exists(test_filename):
+        os.remove(test_filename)
+
+    # Summary
+    expected_results = [True, False, True, True, False, True]
+    actual_results = [result1, result2, result3, result4, result5, result6]
+
+    print("\n" + "=" * 50)
+    print("TEST SUMMARY:")
+    print("=" * 50)
+
+    all_passed = True
+    for i, (expected, actual) in enumerate(
+        zip(expected_results, actual_results, strict=True), 1
+    ):
+        status = "PASS" if expected == actual else "FAIL"
+        if expected != actual:
+            all_passed = False
+        print(f"Test {i}: {status} (Expected: {expected}, Got: {actual})")
+
+    overall_result = "ALL TESTS PASSED" if all_passed else "SOME TESTS FAILED"
+    print(f"\nOverall result: {overall_result}")
+    return all_passed
+
+
+if __name__ == "__main__":
+    test_date_uniqueness()

src/data_manager.py

@@ -66,6 +66,14 @@ class DataManager:
     def add_entry(self, entry_data: list[str | int]) -> bool:
         """Add a new entry to the CSV file."""
         try:
+            # Check if date already exists
+            df: pd.DataFrame = self.load_data()
+            date_to_add: str = str(entry_data[0])
+
+            if not df.empty and date_to_add in df["date"].values:
+                self.logger.warning(f"Entry with date {date_to_add} already exists.")
+                return False
+
             with open(self.filename, mode="a", newline="") as file:
                 writer = csv.writer(file)
                 writer.writerow(entry_data)
@@ -74,13 +82,22 @@ class DataManager:
             self.logger.error(f"Error adding entry: {str(e)}")
             return False
 
-    def update_entry(self, date: str, values: list[str | int]) -> bool:
-        """Update an existing entry identified by date."""
+    def update_entry(self, original_date: str, values: list[str | int]) -> bool:
+        """Update an existing entry identified by original_date."""
         try:
             df: pd.DataFrame = self.load_data()
-            # Find the row to update using date as a unique identifier
+            new_date: str = str(values[0])
+
+            # If the date is being changed, check if the new date already exists
+            if original_date != new_date and new_date in df["date"].values:
+                self.logger.warning(
+                    f"Cannot update: entry with date {new_date} already exists."
+                )
+                return False
+
+            # Find the row to update using original_date as a unique identifier
             df.loc[
-                df["date"] == date,
+                df["date"] == original_date,
                 [
                     "date",
                     "depression",

src/main.py

@@ -119,9 +119,11 @@ class MedTrackerApp:
 
     def _create_edit_window(self, item_id: str, values: tuple[str, ...]) -> None:
         """Create a new Toplevel window for editing an entry."""
+        original_date = values[0]  # Store the original date
+
         # Define callbacks for edit window buttons
         callbacks: dict[str, Callable] = {
-            "save": self._save_edit,
+            "save": lambda win, *args: self._save_edit(win, original_date, *args),
             "delete": lambda win: self._delete_entry(win, item_id),
         }
 
@@ -131,6 +133,7 @@ class MedTrackerApp:
     def _save_edit(
         self,
         edit_win: tk.Toplevel,
+        original_date: str,
         date: str,
         dep: int,
         anx: int,
@@ -156,13 +159,23 @@ class MedTrackerApp:
             note,
         ]
 
-        if self.data_manager.update_entry(date, values):
+        if self.data_manager.update_entry(original_date, values):
             edit_win.destroy()
             messagebox.showinfo(
                 "Success", "Entry updated successfully!", parent=self.root
             )
             self._clear_entries()
             self.load_data()
+        else:
+            # Check if it's a duplicate date issue
+            df = self.data_manager.load_data()
+            if original_date != date and not df.empty and date in df["date"].values:
+                messagebox.showerror(
+                    "Error",
+                    f"An entry for date '{date}' already exists. "
+                    "Please use a different date.",
+                    parent=edit_win,
+                )
             else:
                 messagebox.showerror("Error", "Failed to save changes", parent=edit_win)
 
@@ -189,12 +202,27 @@ class MedTrackerApp:
         ]
         logger.debug(f"Adding entry: {entry}")
 
+        # Check if date is empty
+        if not self.date_var.get().strip():
+            messagebox.showerror("Error", "Please enter a date.", parent=self.root)
+            return
+
         if self.data_manager.add_entry(entry):
             messagebox.showinfo(
                 "Success", "Entry added successfully!", parent=self.root
             )
             self._clear_entries()
             self.load_data()
+        else:
+            # Check if it's a duplicate date by trying to load existing data
+            df = self.data_manager.load_data()
+            if not df.empty and self.date_var.get() in df["date"].values:
+                messagebox.showerror(
+                    "Error",
+                    f"An entry for date '{self.date_var.get()}' already exists. "
+                    "Please use a different date or edit the existing entry.",
+                    parent=self.root,
+                )
             else:
                 messagebox.showerror("Error", "Failed to add entry", parent=self.root)