Add non-streaming completePrompt to all providers

src/api/providers/openai.ts

@@ -6,11 +6,11 @@ import {
 	ModelInfo,
 	openAiModelInfoSaneDefaults,
 } from "../../shared/api"
-import { ApiHandler } from "../index"
+import { ApiHandler, SingleCompletionHandler } from "../index"
 import { convertToOpenAiMessages } from "../transform/openai-format"
 import { ApiStream } from "../transform/stream"
 
-export class OpenAiHandler implements ApiHandler {
+export class OpenAiHandler implements ApiHandler, SingleCompletionHandler {
 	protected options: ApiHandlerOptions
 	private client: OpenAI
 
@@ -100,4 +100,22 @@ export class OpenAiHandler implements ApiHandler {
 			info: openAiModelInfoSaneDefaults,
 		}
 	}
+
+	async completePrompt(prompt: string): Promise<string> {
+		try {
+			const requestOptions: OpenAI.Chat.Completions.ChatCompletionCreateParamsNonStreaming = {
+				model: this.getModel().id,
+				messages: [{ role: "user", content: prompt }],
+				temperature: 0,
+			}
+			
+			const response = await this.client.chat.completions.create(requestOptions)
+			return response.choices[0]?.message.content || ""
+		} catch (error) {
+			if (error instanceof Error) {
+				throw new Error(`OpenAI completion error: ${error.message}`)
+			}
+			throw error
+		}
+	}
 }