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DeepSeekChatCompleteResponse,
DeepSeekStreamChunk,
} from '@api/ai-providers/deepseek/types';
import {
generateErrorResponse,
generateInvalidProviderResponseError,
} from '@api/utils/ai-provider';
import type {
AIProviderFunctionConfig,
ResponseChunkStreamTransformFunction,
ResponseTransformFunction,
} from '@shared/types/ai-providers/config';
import type { ChatCompletionRequestBody } from '@shared/types/api/routes/chat-completions-api';
import { ChatCompletionMessageRole } from '@shared/types/api/routes/shared/messages';
import { AIProvider } from '@shared/types/constants';
export const deepSeekChatCompleteConfig: AIProviderFunctionConfig = {
model: {
param: 'model',
required: true,
default: 'deepseek-chat',
},
messages: {
param: 'messages',
default: '',
transform: (saRequestBody: ChatCompletionRequestBody) => {
if (!saRequestBody.messages) return [];
return saRequestBody.messages?.map((message) => {
if (message.role === ChatCompletionMessageRole.DEVELOPER)
return { ...message, role: ChatCompletionMessageRole.SYSTEM };
return message;
});
},
},
max_tokens: {
param: 'max_tokens',
default: 100,
min: 0,
},
max_completion_tokens: {
param: 'max_tokens',
default: 100,
min: 0,
},
temperature: {
param: 'temperature',
default: 1,
min: 0,
max: 2,
},
top_p: {
param: 'top_p',
default: 1,
min: 0,
max: 1,
},
stream: {
param: 'stream',
default: false,
},
frequency_penalty: {
param: 'frequency_penalty',
default: 0,
min: -2,
max: 2,
},
presence_penalty: {
param: 'presence_penalty',
default: 0,
min: -2,
max: 2,
},
stop: {
param: 'stop',
default: null,
},
logprobs: {
param: 'logprobs',
default: false,
},
top_logprobs: {
param: 'top_logprobs',
default: 0,
min: 0,
max: 20,
},
tools: {
param: 'tools',
},
tool_choice: {
param: 'tool_choice',
},
response_format: {
param: 'response_format',
transform: (raRequestBody: ChatCompletionRequestBody) => {
const format = raRequestBody.response_format;
if (!format) return undefined;
// DeepSeek only supports json_object, not json_schema
if (typeof format === 'object' && 'type' in format) {
if (format.type === 'json_schema') {
throw new Error(
'DeepSeek does not support json_schema response format. Use { type: "json_object" } instead.',
);
}
}
return format;
},
},
};
export const deepSeekChatCompleteResponseTransform: ResponseTransformFunction =
(aiProviderResponseBody, aiProviderResponseStatus) => {
if (
'message' in aiProviderResponseBody &&
aiProviderResponseStatus !== 200
) {
return generateErrorResponse(
{
message: aiProviderResponseBody.message as string,
type: aiProviderResponseBody.type as string,
param: aiProviderResponseBody.param as string | undefined,
code: aiProviderResponseBody.code as string,
},
AIProvider.DEEPSEEK,
);
}
if ('choices' in aiProviderResponseBody) {
const response =
aiProviderResponseBody as unknown as DeepSeekChatCompleteResponse;
// Validate required fields
if (!response.id || !Array.isArray(response.choices)) {
return generateInvalidProviderResponseError(
aiProviderResponseBody,
AIProvider.DEEPSEEK,
);
}
return {
id: response.id,
object: response.object,
created: response.created,
model: response.model,
provider: AIProvider.DEEPSEEK,
choices: response.choices.map((choice) => ({
index: choice.index,
message: {
role: choice.message.role,
content: choice.message.content,
...(choice.message.tool_calls && {
tool_calls: choice.message.tool_calls,
}),
},
finish_reason: choice.finish_reason,
})),
usage: response.usage
? {
prompt_tokens: response.usage.prompt_tokens,
completion_tokens: response.usage.completion_tokens,
total_tokens: response.usage.total_tokens,
}
: undefined,
};
}
return generateInvalidProviderResponseError(
aiProviderResponseBody,
AIProvider.DEEPSEEK,
);
};
export const deepSeekChatCompleteStreamChunkTransform: ResponseChunkStreamTransformFunction =
(responseChunk) => {
let chunk = String(responseChunk).trim();
chunk = chunk.replace(/^data: /, '');
chunk = chunk.trim();
if (chunk === '[DONE]') {
return `data: ${chunk}\n\n`;
}
const parsedChunk: DeepSeekStreamChunk = JSON.parse(chunk);
return `data: ${JSON.stringify({
id: parsedChunk.id,
object: parsedChunk.object,
created: parsedChunk.created,
model: parsedChunk.model,
provider: AIProvider.DEEPSEEK,
choices: parsedChunk.choices.map((choice) => ({
index: choice.index,
delta: choice.delta,
finish_reason: choice.finish_reason,
})),
usage: parsedChunk.usage,
})}\n\n`;
};
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