Zakaria
123 lines
4.0 KiB
Python
123 lines
4.0 KiB
Python
"""
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Transcription Provider Registry
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================================
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Central map of registered STT providers. Populated by plugins at
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import-time via :meth:`PluginContext.register_transcription_provider`;
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consumed by :mod:`tools.transcription_tools` to dispatch
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:func:`transcribe_audio` calls to the active plugin backend **when**
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the configured ``stt.provider`` name is not a built-in.
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Built-ins-always-win
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--------------------
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Plugin names that collide with a built-in STT provider (``local``,
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``local_command``, ``groq``, ``openai``, ``mistral``, ``xai``) are
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rejected at registration with a warning. This invariant is also
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re-checked at dispatch time in
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:func:`tools.transcription_tools._dispatch_to_plugin_provider`.
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"""
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from __future__ import annotations
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import logging
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import threading
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from typing import Dict, List, Optional
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from agent.transcription_provider import TranscriptionProvider
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logger = logging.getLogger(__name__)
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# Names reserved for native built-in STT handlers. Plugins cannot
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# register a name in this set — the registration call is rejected with
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# a warning. **Kept in sync with ``BUILTIN_STT_PROVIDERS`` in
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# :mod:`tools.transcription_tools`** — a regression test in
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# ``tests/agent/test_transcription_registry.py::TestBuiltinSync``
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# fails if the two lists drift. Importing from
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# ``tools.transcription_tools`` directly would create a circular
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# dependency (``tools.transcription_tools`` imports
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# ``agent.transcription_registry`` for dispatch).
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_BUILTIN_NAMES = frozenset({
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"local",
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"local_command",
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"groq",
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"openai",
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"mistral",
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"xai",
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})
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_providers: Dict[str, TranscriptionProvider] = {}
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_lock = threading.Lock()
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def register_provider(provider: TranscriptionProvider) -> None:
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"""Register a transcription provider.
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Rejects:
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- Non-:class:`TranscriptionProvider` instances (raises :class:`TypeError`).
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- Empty/whitespace ``.name`` (raises :class:`ValueError`).
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- Names colliding with a built-in (logs a warning, silently
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ignores — built-ins-always-win invariant).
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Re-registration (same ``name``) overwrites the previous entry and
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logs a debug message — makes hot-reload scenarios (tests, dev
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loops) behave predictably.
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"""
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if not isinstance(provider, TranscriptionProvider):
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raise TypeError(
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f"register_provider() expects a TranscriptionProvider instance, "
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f"got {type(provider).__name__}"
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)
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name = provider.name
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if not isinstance(name, str) or not name.strip():
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raise ValueError("Transcription provider .name must be a non-empty string")
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key = name.strip().lower()
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if key in _BUILTIN_NAMES:
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logger.warning(
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"Transcription provider '%s' shadows a built-in name; registration "
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"ignored. Built-in STT providers (%s) always win — pick a different "
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"name.",
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key, ", ".join(sorted(_BUILTIN_NAMES)),
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)
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return
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with _lock:
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existing = _providers.get(key)
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_providers[key] = provider
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if existing is not None:
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logger.debug(
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"Transcription provider '%s' re-registered (was %r)",
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key, type(existing).__name__,
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)
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else:
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logger.debug(
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"Registered transcription provider '%s' (%s)",
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key, type(provider).__name__,
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)
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def list_providers() -> List[TranscriptionProvider]:
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"""Return all registered providers, sorted by name."""
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with _lock:
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items = list(_providers.values())
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return sorted(items, key=lambda p: p.name)
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def get_provider(name: str) -> Optional[TranscriptionProvider]:
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"""Return the provider registered under *name*, or None.
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Name matching is case-insensitive and whitespace-tolerant — mirrors
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how ``tools.transcription_tools._get_provider`` normalizes the
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configured ``stt.provider`` value.
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"""
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if not isinstance(name, str):
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return None
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return _providers.get(name.strip().lower())
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def _reset_for_tests() -> None:
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"""Clear the registry. **Test-only.**"""
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with _lock:
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_providers.clear()
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