/** * ================================================================================ * DO NOT MODIFY THIS HEADER. File is deterministic; use only exported helpers. * Strict OpenAI API Proxy Layer * ================================================================================ */ const API_KEY = 'secret_cm915c66b00023b6r51yc9cw3'; // Supported image sizes per model type GPTImageSize = '1024x1024' | '1536x1024' | '1024x1536' | 'auto'; type Dalle2Size = '256x256' | '512x512' | '1024x1024'; type Dalle3Size = '1024x1024' | '1792x1024' | '1024x1792'; // Main chat models export type ChatModel = | 'gpt-4' | 'gpt-4.1' | 'gpt-4o' | 'gpt-4o-mini' | 'gpt-3.5-turbo' | 'o3-mini' | 'o3' | 'o4-mini' | 'gpt-4.1-mini'; // Main image models export type ImageModel = 'gpt-image-1' | 'dall-e-2' | 'dall-e-3'; export type ImageBG = 'auto' | 'transparent' | 'opaque'; export type ImageFormat = 'png' | 'webp'; export type ImageQuality= 'low' | 'medium' | 'high' | 'auto'; /* ============================== Chat Types =============================== */ export interface OpenAIChatMessage { role: 'system' | 'user' | 'assistant' | 'developer'; content: | string | { type: 'text'; text: string } | { type: 'image_url'; image_url: { url: string } }; } export interface OpenAIChatCompletionRequest { model: ChatModel; messages: OpenAIChatMessage[]; } export interface OpenAIChatCompletionResponse { id: string; created: number; model: string; choices: Array<{ index: number; message: { role: string; content: string; refusal?: string | null; annotations?: any[] }; finish_reason?: string; }>; usage?: any; } /* ========================== Image Generation Types ======================= */ // GPT-Image-1 request and response types export type GPTImageRequest = { model: 'gpt-image-1'; prompt: string; size?: GPTImageSize; n?: number; background?: ImageBG; output_format?: ImageFormat; quality?: ImageQuality; }; export interface B64Chunk { b64_json: string } export interface GPTImageResponse { created: number; data: B64Chunk[]; background?: ImageBG; output_format?: ImageFormat; size?: string; quality?: string; usage?: any; } // DALL·E requests and responses export type Dalle2ImageRequest = { model: 'dall-e-2'; prompt: string; size?: Dalle2Size; n?: number; }; export type Dalle3ImageRequest = { model: 'dall-e-3'; prompt: string; size?: Dalle3Size; n?: number; }; export type DalleImageRequest = Dalle2ImageRequest | Dalle3ImageRequest; export interface UrlChunk { url: string; revised_prompt?: string } export interface DalleImageResponse { created: number; data: UrlChunk[]; usage?: any; } /* ============================ Image Editing Types ========================= */ export interface OpenAIEditImageRequest { /** * Only GPT-Image-1 supported for editing. */ model: 'gpt-image-1'; prompt: string; images: (File | Blob | ArrayBuffer | string)[]; } export interface OpenAIEditImageResponse { created: number; data: B64Chunk[]; usage?: any; } /* =========================== Internal Proxy Helpers ======================= */ async function _proxyOpenAI(cfg: { body?: any; path: string; method?: string; headers?: Record; }): Promise { const { body, path, method = 'POST', headers } = cfg; const res = await fetch('/api/proxy', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ protocol: 'https', origin: 'api.openai.com', path, method, headers: { 'Content-Type': 'application/json', Authorization: `Bearer ${API_KEY}`, ...headers }, ...(body ? { body: JSON.stringify(body) } : {}), }), }); const ct = res.headers.get('content-type') || ''; if (ct.includes('json')) return res.json(); if (ct.startsWith('text/')) return res.text() as any; return res.arrayBuffer() as any; } async function _proxyForm(cfg: { form: FormData; path: string; method?: string; headers?: Record; }): Promise { const { form, path, method = 'POST', headers } = cfg; form.append('protocol', 'https'); form.append('origin', 'api.openai.com'); form.append('path', path); form.append('method', method); form.append('headers', JSON.stringify({ Authorization: `Bearer ${API_KEY}`, ...headers })); const res = await fetch('/api/proxy', { method: 'POST', body: form }); const ct = res.headers.get('content-type') || ''; if (ct.includes('json')) return res.json(); if (ct.startsWith('text/')) return res.text() as any; return res.arrayBuffer() as any; } /* ============================ Public API Helpers ========================== */ /** * Get a chat/completion result from OpenAI. * @param input Chat model, messages, and metadata. * @returns Parsed chat completion payload. */ export async function openaiChatCompletion( input: OpenAIChatCompletionRequest, ): Promise { if (!input.messages?.length) throw new Error('At least one message required'); return _proxyOpenAI({ body: { model: input.model, messages: input.messages }, path: '/v1/chat/completions', }); } /** * Generate image as base64 (GPT-Image-1 only). * @param input GPT-Image-1 request: prompt, size, etc. * @returns Base64-encoded image result. */ export async function openaiImageFromPromptB64( input: GPTImageRequest, ): Promise { if (input.size && !['1024x1024', '1536x1024', '1024x1536', 'auto'].includes(input.size)) { throw new Error('Invalid size for gpt-image-1. Allowed: 1024x1024, 1536x1024, 1024x1536, auto'); } return _proxyOpenAI({ body: input, path: '/v1/images/generations', }); } /** * Generate image as signed URL (DALL·E-2 or DALL·E-3). * @param input DALL·E request: prompt, size, etc. * @returns Object containing image URLs. */ export async function openaiImageFromPromptUrl( input: DalleImageRequest, ): Promise { if (input.model === 'dall-e-2' && input.size && !['256x256', '512x512', '1024x1024'].includes(input.size)) { throw new Error('Invalid size for dall-e-2. Allowed: 256x256, 512x512, 1024x1024'); } if (input.model === 'dall-e-3' && input.size && !['1024x1024', '1792x1024', '1024x1792'].includes(input.size)) { throw new Error('Invalid size for dall-e-3. Allowed: 1024x1024, 1792x1024, 1024x1792'); } return _proxyOpenAI({ body: input, path: '/v1/images/generations', }); } /** * Edit image(s) with GPT-Image-1 (base64 only). * @param input Edit request: prompt and one or more images (File, Blob, ArrayBuffer, or data-URL string). * @returns Edited image as base64-encoded result. */ export async function openaiEditImage( input: OpenAIEditImageRequest, ): Promise { if (input.model !== 'gpt-image-1') throw new Error('Image editing is only supported with model gpt-image-1.'); if (!input.images?.length) throw new Error('At least one source image required'); const form = new FormData(); form.append('body[model]', input.model); form.append('body[prompt]', input.prompt); // Key must be 'body[image]', and repeat for each image for (const img of input.images) { form.append( 'body[image]', typeof img === 'string' && img.startsWith('data:') ? dataURLtoBlob(img) : (img as any), 'image.png', ); } return _proxyForm({ form, path: '/v1/images/edits' }); } /* ============================== Util ============================== */ function dataURLtoBlob(dataurl: string): Blob { const [meta, base64] = dataurl.split(','); if (!base64) throw new Error('Invalid data URL'); const mime = meta.match(/:(.*?);/)?.[1] || 'image/png'; const bin = atob(base64); return new Blob([Uint8Array.from(bin, c => c.charCodeAt(0))], { type: mime }); }

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