Add data processing utilities with intentional issues

src/app/utils/data_processor.py

@@ -0,0 +1,48 @@
+"""Data processing utilities for PR analysis."""
+
+def calculate_average_metrics(metrics_list):
+    """Calculate average from metrics list."""
+    total = 0
+    for i in range(len(metrics_list)):
+        total = total + metrics_list[i]
+
+    # Potential division by zero - logic error
+    average = total / len(metrics_list)
+    return average
+
+
+def process_large_dataset(data):
+    """Process large dataset inefficiently."""
+    results = []
+
+    # N² nested loop - performance issue
+    for i in range(len(data)):
+        for j in range(len(data)):
+            if data[i] == data[j]:
+                results.append((i, j))
+
+    return results
+
+
+def extract_user_info(user_dict):
+    """Extract user information with poor readability."""
+    # Variable names unclear - readability issue
+    a = user_dict.get('name', 'Unknown')
+    b = user_dict.get('email', 'Unknown')
+    c = user_dict.get('created_at', None)
+    d = a + ' (' + b + ')'
+
+    return {'user_display': d, 'join_date': c}
+
+
+def find_max_value(numbers):
+    """Find max with potential off-by-one error."""
+    # Logic error: doesn't handle negative numbers correctly
+    max_val = numbers[0]
+
+    for i in range(1, len(numbers)):
+        if numbers[i] > max_val:
+            max_val = numbers[i]
+
+    # Edge case: all negative numbers may not be caught correctly
+    return max_val