French verb negation

src/harmony/matching/negator.py

@@ -26,10 +26,31 @@
 '''
 
 import spacy
+import re
 
 nlp = spacy.blank("en")
 
 
+def negate_french_sentence(sentence):
+    # Regular expression to match verbs
+    verb_pattern = re.compile(r'\b(je|tu|il|elle|nous|vous|ils|elles|on)\s+([a-zA-Zéèàùûôâî]+)\b', re.IGNORECASE)
+
+    # Function to replace the verb with negated form
+    def replace_verb(match):
+        subject = match.group(1)
+        verb = match.group(2)
+        return f"{subject} ne {verb} pas"
+
+    # Apply the negation
+    negated_sentence = verb_pattern.sub(replace_verb, sentence)
+
+    # Check if the sentence had a match, if not, return original sentence with negation applied directly
+    if negated_sentence == sentence:
+        negated_sentence = re.sub(r'(\w+)', r'ne \1 pas', sentence)
+
+    return negated_sentence
+
+
 def get_change_en(doc) -> dict:
     """
     Identify how to change an English sentence from positive to negative or vice versa.
@@ -72,6 +93,15 @@ def get_change_pt(doc) -> dict:
         return result
     return {0: ("insert_before", "não")}
 
+def get_change_fr(doc) -> dict:
+    """
+    Identify how to change a French sentence from positive to negative. Note that negative to positive
+    is not currently supported.
+    :param doc:
+    :return:
+    """
+    return negate_french_sentence(doc)
+
 
 def negate(text: str, language: str) -> str:
     """
@@ -85,6 +115,8 @@ def negate(text: str, language: str) -> str:
 
     if language == "pt":
         changes = get_change_pt(doc)
+    elif language == "fr":
+        return get_change_fr(text)
     else:
         changes = get_change_en(doc)
 

tests/test_negator.py

@@ -42,6 +42,10 @@ def test_simple_example_pt(self):
         text = "eu me sinto deprimido"
         self.assertEqual("não eu me sinto deprimido", negate(text, "pt"))
 
+    def test_simple_example_fr(self):
+        text = "Je suis content"
+        self.assertEqual("Je ne suis pas content", negate(text, "fr"))
+
 
 if __name__ == '__main__':
     unittest.main()