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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 | 152x 9x 2x 1x 4x 2x 7x | import { Message } from "../chat/Message.js";
import { UnsupportedFeatureError } from "../errors/index.js";
import {
Provider,
ChatRequest,
ChatResponse,
ChatChunk,
ModelInfo,
ImageRequest,
ImageResponse,
TranscriptionRequest,
TranscriptionResponse,
ModerationRequest,
ModerationResponse,
EmbeddingRequest,
EmbeddingResponse,
ProviderCapabilities
} from "./Provider.js";
/**
* Abstract base class for all LLM providers.
* Provides common functionality and default implementations for unsupported features.
* Each provider must implement the abstract methods and can override default implementations.
*/
export abstract class BaseProvider implements Provider {
public abstract apiBase(): string;
public abstract headers(): Record<string, string>;
protected abstract providerName(): string;
get id(): string {
return this.providerName();
}
public defaultModel(_feature?: string): string {
return "";
}
protected throwUnsupportedError(feature: string): never {
throw new UnsupportedFeatureError(this.providerName(), feature);
}
abstract chat(request: ChatRequest): Promise<ChatResponse>;
abstract capabilities?: ProviderCapabilities;
async *stream?(_request: ChatRequest): AsyncIterable<ChatChunk> {
this.throwUnsupportedError("stream");
yield* [];
}
async listModels?(): Promise<ModelInfo[]> {
this.throwUnsupportedError("listModels");
}
async paint?(_request: ImageRequest): Promise<ImageResponse> {
this.throwUnsupportedError("paint");
}
async transcribe?(_request: TranscriptionRequest): Promise<TranscriptionResponse> {
this.throwUnsupportedError("transcribe");
}
async moderate?(_request: ModerationRequest): Promise<ModerationResponse> {
this.throwUnsupportedError("moderate");
}
async embed?(_request: EmbeddingRequest): Promise<EmbeddingResponse> {
this.throwUnsupportedError("embed");
}
formatToolResultMessage(
toolCallId: string,
content: string,
options?: { isError?: boolean }
): Message {
return {
role: "tool",
tool_call_id: toolCallId,
content: content,
isError: options?.isError
};
}
}
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