API's

All interactions with external services are abstracted into dedicated service classes to keep the business logic clean and testable.

DidApi (/lib/agent/apis/did_api.dart)

• Purpose: Manages all communication for creating and interacting with D-ID agent streams.

• Protocol: HTTPS (RESTful API calls).

• Key Methods:

  • fetchAgents(): Retrieves the list of available agents.

  • createChat(): Initiates a new chat session.

  • createStream(): Establishes a new WebRTC stream.

  • sendMessage(): Sends the user's transcribed text to the agent.

  • sendAnswer() / sendIce(): Handles the WebRTC signaling process.

TranscriptService (/lib/agent/apis/transcript_service.dart)

• Purpose: Manages the real-time, streaming voice-to-text transcription.

• Protocol: WebSocket (Socket.IO).

• Functionality: Establishes a persistent connection to the backend. When the user is recording, it streams raw audio chunks to the server and listens for incoming transcript events containing the transcribed text.

AuthApi (/lib/auth/apis/auth_api.dart)

• Purpose: Handles user authentication.

• Protocol: HTTPS (RESTful API calls).

• Key Methods:

  • login(user, pass)

  • register(user, pass)

  • verify()