featured-id-patch

services/diff.py

@@ -0,0 +1,46 @@
+import re
+from difflib import ndiff
+
+
+def get_diff(original, modified):
+    """
+    Get the difference between two strings using difflib.
+
+    Parameters:
+    - original: The original string.
+    - modified: The modified string.
+
+    Returns:
+    A list of differences.
+    """
+    diff = list(ndiff(original.split(), modified.split()))
+    return diff
+
+def apply_diff(original, diff):
+    """
+    Apply the difference to the original string.
+
+    Parameters:
+    - original: The original string.
+    - diff: The difference obtained from get_diff function.
+
+    Returns:
+    The modified string.
+    """
+    result = []
+    pattern = re.compile(r'^(\+|-) ')
+
+    for line in diff:
+        match = pattern.match(line)
+        if match:
+            op = match.group(1)
+            content = line[2:]
+            if op == '+':
+                result.append(content)
+            elif op == '-':
+                # Ignore deleted lines
+                pass
+        else:
+            result.append(line)
+
+    return ' '.join(result)