Import FastTextPager repo

1 files changed, 43 insertions, 0 deletions

diff --git a/app/profanity_filter.py b/app/profanity_filter.py
new file mode 100644
index 0000000..b8c84ed
--- /dev/null
+++ b/app/profanity_filter.py
@@ -0,0 +1,43 @@
+#!/usr/bin/env python3
+
+class ProfanityFilter:
+    def __init__(self, en_path: str):
+        self.en_path = en_path
+        self.en_profanity = set()
+
+    def load(self):
+        with open(self.en_path, 'r') as f:
+            for line in f:
+                self.en_profanity.add(line.strip())
+
+    def filter(self, line: str, language_code: str = "en") -> str:
+        filtered = ""
+
+        if language_code not in {"en"}:
+            raise ValueError(f"Language code \"{language_code}\" is " +
+                    "unsupported by the profanity filter")
+
+        # Translation table converting vowels to asterisks.
+        vowel_to_asterisk = str.maketrans('aeiouAEIOU', '**********')
+
+        result = []
+        for word in line.split():
+            word_clean = word.lower()
+            # Filter out non-alphabet characters from the word.
+            word_clean = ''.join([char for char in word_clean if char.isalpha()])
+            if word_clean in self.en_profanity:
+                result.append(word.translate(vowel_to_asterisk))
+            else:
+                result.append(word)
+
+        return " ".join(result)
+
+if __name__ == "__main__":
+    en_path = "/mnt/d/vrc/TaSTT/GUI/Profanity/Profanity/en"
+    p = ProfanityFilter(en_path)
+    p.load()
+    assert(p.filter("fuck") == "f*ck")
+    assert(p.filter("fuck!") == "f*ck!")
+    assert(p.filter("fuck shit") == "f*ck sh*t")
+    assert(p.filter("fuck shit this should not be filtered") == "f*ck sh*t this should not be filtered")
+    assert(p.filter("ASS") == "*SS")