core/services/diff.py

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2024-02-02 12:03:44 +00:00
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)