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fix: preserve SSML tags in clean_text_for_tts #34

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fix: preserve SSML tags in clean_text_for_tts #34

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15 changes: 14 additions & 1 deletion custom_components/universal_notifier/utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -94,10 +94,23 @@ def get_current_slot_info(slots_conf: dict, now_time,
current_vol = vol_val
return current_slot, current_vol

# Tag SSML supportati dai motori TTS (Alexa, Google): vanno preservati.
SSML_TAGS = {
"speak", "voice", "prosody", "break", "say-as", "emphasis",
"lang", "phoneme",
}
_TAG_PATTERN = re.compile(r'<\s*/?\s*([a-zA-Z][\w:-]*)[^>]*>')

def _strip_non_ssml_tags(text: str) -> str:
"""Rimuove i tag HTML mantenendo i tag SSML noti."""
return _TAG_PATTERN.sub(
lambda m: m.group(0) if m.group(1).lower() in SSML_TAGS else '', text
)

def clean_text_for_tts(text: str) -> str:
"""Rimuove caratteri speciali per la sintesi vocale."""
if not text: return ""
text = re.sub(r'<[^>]+>', '', text) # Via HTML tags
text = _strip_non_ssml_tags(text) # Via HTML tags, tiene SSML
text = re.sub(r'[*_`\[\]]', '', text) # Via markdown
text = re.sub(r'http\S+', '', text) # Via URL
# Via emoji/icon (preserva lettere accentate latin-1)
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15 changes: 15 additions & 0 deletions tests/test_utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -201,6 +201,21 @@ def test_none_text(self):
def test_collapses_whitespace(self):
assert clean_text_for_tts("hello world") == "hello world"

def test_preserves_ssml_voice_tag(self):
assert clean_text_for_tts(
"<voice name='Giorgio'>Il sistema è operativo!</voice>"
) == "<voice name='Giorgio'>Il sistema è operativo!</voice>"

@pytest.mark.parametrize("tag", ["prosody rate='slow'", "break time='500ms'",
"say-as interpret-as='date'", "emphasis"])
def test_preserves_other_ssml_tags(self, tag):
assert f"<{tag}>" in clean_text_for_tts(f"<{tag}>ciao")

def test_strips_html_around_ssml(self):
assert clean_text_for_tts(
"<b><voice name='Giorgio'>ciao</voice></b>"
) == "<voice name='Giorgio'>ciao</voice>"


# ============================================================================
# sanitize_text_visual
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