Update validators.py

validators.py

@@ -41,3 +41,94 @@ def with_fallback_author_role(df):
     fixed.loc[(fixed["author_role"] == "") & teacher_name_hint, "author_role"] = "교사"
     fixed.loc[fixed["author_role"] == "", "author_role"] = "학생"
     return fixed
+
+
+
+ALLOWED_TEXT_PATTERN = re.compile(r"^[0-9A-Za-z가-힣ㄱ-ㅎㅏ-ㅣ _.,!?():;@#&/\-]*$")
+
+
+def _contains_forbidden_word(text, forbidden_words=None):
+    words = forbidden_words or []
+    lowered = str(text or "").lower()
+    for word in words:
+        if str(word).lower() in lowered:
+            return True
+    return False
+
+
+def _validate_text_field(
+    raw_text,
+    *,
+    field_name,
+    max_len,
+    allow_empty=False,
+    forbidden_words=None,
+    allowed_pattern=ALLOWED_TEXT_PATTERN,
+):
+    normalized = normalize_user_text(raw_text, max_len=max_len)
+    if not normalized:
+        if allow_empty:
+            return True, "", None, None
+        return False, "", "VALIDATION_EMPTY", f"{field_name}을(를) 입력해 주세요."
+
+    if len(normalized) > max_len:
+        return False, "", "VALIDATION_TOO_LONG", f"{field_name}은(는) {max_len}자 이하여야 합니다."
+
+    if allowed_pattern and not allowed_pattern.match(normalized):
+        return False, "", "VALIDATION_INVALID_CHARS", f"{field_name}에 허용되지 않은 문자가 포함되어 있습니다."
+
+    if _contains_forbidden_word(normalized, forbidden_words=forbidden_words):
+        return False, "", "VALIDATION_FORBIDDEN", f"{field_name}에 사용할 수 없는 단어가 포함되어 있습니다."
+
+    return True, normalized, None, None
+
+
+def validate_room_name(raw_text, max_len=60):
+    collapsed = normalize_room_name(raw_text, max_len=max_len)
+    return _validate_text_field(
+        collapsed,
+        field_name="방 이름",
+        max_len=max_len,
+        allow_empty=False,
+        forbidden_words=["관리자", "운영자"],
+    )
+
+
+def validate_student_name(raw_text, max_len=30):
+    return _validate_text_field(
+        raw_text,
+        field_name="학생 이름/학번",
+        max_len=max_len,
+        allow_empty=False,
+        forbidden_words=["관리자", "운영자", "admin"],
+    )
+
+
+def validate_opinion_content(raw_text, max_len=700):
+    return _validate_text_field(
+        raw_text,
+        field_name="의견 내용",
+        max_len=max_len,
+        allow_empty=False,
+    )
+
+
+def validate_entry_code(raw_text, max_len=60):
+    return _validate_text_field(
+        raw_text,
+        field_name="입장 암호",
+        max_len=max_len,
+        allow_empty=True,
+        allowed_pattern=re.compile(r"^[0-9A-Za-z가-힣ㄱ-ㅎㅏ-ㅣ _!@#$%^&*()+=.?/:;\-]*$"),
+    )
+
+
+def validate_teacher_credential(raw_text, *, field_name, max_len=60):
+    return _validate_text_field(
+        raw_text,
+        field_name=field_name,
+        max_len=max_len,
+        allow_empty=False,
+        forbidden_words=[" "],
+        allowed_pattern=re.compile(r"^[0-9A-Za-z_.@\-]+$"),
+    )