Jason Woltje
c40373fa3b
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Add SpeechModule with provider interfaces and service skeleton for multi-tier TTS fallback (premium -> default -> fallback) and STT transcription support. Includes 27 unit tests covering provider selection, fallback logic, and availability checks. - ISTTProvider interface with transcribe/isHealthy methods - ITTSProvider interface with synthesize/listVoices/isHealthy methods - Shared types: SpeechTier, TranscriptionResult, SynthesisResult, etc. - SpeechService with graceful TTS fallback chain - NestJS injection tokens (STT_PROVIDER, TTS_PROVIDERS) - SpeechModule registered in AppModule - ConfigModule integration via speechConfig registerAs factory Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
20 lines
459 B
TypeScript
20 lines
459 B
TypeScript
/**
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* Speech Module Constants
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*
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* NestJS injection tokens for speech providers.
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*
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* Issue #389
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*/
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/**
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* Injection token for the STT (speech-to-text) provider.
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* Providers implementing ISTTProvider register under this token.
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*/
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export const STT_PROVIDER = Symbol("STT_PROVIDER");
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/**
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* Injection token for TTS (text-to-speech) providers map.
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* Registered as Map<SpeechTier, ITTSProvider>.
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*/
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export const TTS_PROVIDERS = Symbol("TTS_PROVIDERS");
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