508 lines
16 KiB
TypeScript
508 lines
16 KiB
TypeScript
import "server-only";
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import sharp from "sharp";
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import { uploadFile } from "@/lib/storage/service";
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interface RuxaImageConfig {
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apiKey: string;
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baseURL: string;
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}
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interface RuxaImageParams {
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aspectRatio?: string;
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imageSize?: string;
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imageCount?: number;
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outputFormat?: "png" | "jpg" | "jpeg" | "webp";
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}
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interface UploadedImage {
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thumbnail: string;
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original: string;
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}
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const DEFAULT_RESOLUTION = "1k";
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const DEFAULT_OUTPUT_FORMAT = "png";
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const POLL_INTERVAL_MS = 2000;
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const POLL_MAX_ATTEMPTS = 90;
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const RUXA_NANO_BANANA_2_DOC_MODEL_ID = "gemini-3.1-flash-image-preview";
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const RUXA_MODEL_ID_ALIASES: Record<string, string> = {
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"google/nano-banana-2": RUXA_NANO_BANANA_2_DOC_MODEL_ID,
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};
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function normalizeRuxaModelId(modelId?: string) {
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const raw = String(modelId || "").trim();
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if (!raw) return "gpt-image-1.5";
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return RUXA_MODEL_ID_ALIASES[raw] || raw;
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}
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function isRuxaNanoBanana2Model(modelId?: string) {
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const normalized = normalizeRuxaModelId(modelId);
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return normalized === RUXA_NANO_BANANA_2_DOC_MODEL_ID;
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}
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function normalizeUrlForCompare(url: string) {
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try {
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const parsed = new URL(url);
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parsed.search = "";
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parsed.hash = "";
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return parsed.toString();
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} catch {
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return url.split("?")[0]?.split("#")[0] || url;
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}
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}
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function filterSourceImages(urls: string[], sourceUrls: string[]) {
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if (sourceUrls.length === 0) return urls;
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const sourceSet = new Set(sourceUrls.map((url) => normalizeUrlForCompare(url)));
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return urls.filter((url) => !sourceSet.has(normalizeUrlForCompare(url)));
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}
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function joinApiPath(baseURL: string, path: string) {
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const cleanBase = baseURL.replace(/\/+$/, "");
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const cleanPath = path.startsWith("/") ? path : `/${path}`;
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return `${cleanBase}${cleanPath}`;
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}
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function normalizeAspectRatio(aspectRatio?: string) {
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if (!aspectRatio) return undefined;
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const normalized = aspectRatio.trim().toLowerCase();
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if (normalized === "auto") return undefined;
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const ratio = aspectRatio.trim();
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if (["1:1", "16:9", "9:16", "4:3", "3:4", "2:3", "3:2"].includes(ratio)) {
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return ratio;
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}
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return undefined;
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}
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function normalizeResolution(imageSize?: string) {
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if (!imageSize) return DEFAULT_RESOLUTION;
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const normalized = imageSize.trim().toLowerCase();
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if (["1k", "2k", "4k"].includes(normalized)) return normalized;
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return DEFAULT_RESOLUTION;
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}
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function normalizeOutputFormat(outputFormat?: string): "png" | "jpg" | "webp" {
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if (!outputFormat) return DEFAULT_OUTPUT_FORMAT;
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const normalized = outputFormat.trim().toLowerCase();
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if (normalized === "jpg" || normalized === "jpeg") return "jpg";
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if (normalized === "webp") return "webp";
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return "png";
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}
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function normalizeRuxaOutputFormat(modelId: string | undefined, outputFormat?: string) {
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const normalized = normalizeOutputFormat(outputFormat);
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if (!isRuxaNanoBanana2Model(modelId)) {
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return normalized;
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}
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return normalized === "jpg" ? "jpeg" : normalized;
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}
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function extractTaskId(payload: any): string | undefined {
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if (typeof payload === "string" && payload.trim()) {
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return payload.trim();
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}
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if (typeof payload?.data === "string" && payload.data.trim()) {
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return payload.data.trim();
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}
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return (
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payload?.taskId ||
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payload?.task_id ||
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payload?.id ||
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payload?.task?.id ||
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payload?.data?.taskId ||
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payload?.data?.task_id ||
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payload?.data?.id ||
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payload?.data?.task?.id
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);
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}
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function extractStatus(payload: any): string | undefined {
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const raw =
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payload?.status ||
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payload?.taskStatus ||
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payload?.task_status ||
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payload?.state ||
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payload?.data?.status ||
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payload?.data?.taskStatus ||
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payload?.data?.task_status ||
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payload?.data?.state;
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if (typeof raw !== "string") return undefined;
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return raw.toLowerCase();
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}
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function extractErrorMessage(payload: any): string {
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let parsedResultJson: any = null;
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if (typeof payload?.resultJson === "string" && payload.resultJson.trim()) {
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try {
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parsedResultJson = JSON.parse(payload.resultJson);
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} catch {
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parsedResultJson = null;
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}
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}
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return (
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payload?.failMsg ||
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payload?.data?.failMsg ||
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payload?.message ||
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payload?.error ||
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payload?.errorMessage ||
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parsedResultJson?.failMsg ||
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parsedResultJson?.error ||
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payload?.resultJson ||
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payload?.data?.message ||
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payload?.data?.error ||
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"RUXA 任务执行失败"
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);
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}
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function compactPayloadSnippet(payload: any): string {
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try {
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const json = JSON.stringify(payload);
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return json.length > 320 ? `${json.slice(0, 320)}...` : json;
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} catch {
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return String(payload || "");
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}
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}
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function extractPromptAndImages(messages: Array<{ role: string; content: any }>) {
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const lastUserMessage = messages.filter((message) => message.role === "user").pop();
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if (!lastUserMessage) {
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throw new Error("No user message found");
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}
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let prompt = "";
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const imageUrls: string[] = [];
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const pushImageUrl = (url?: string) => {
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if (!url) return;
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const normalized = String(url).trim();
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if (normalized.startsWith("data:")) {
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throw new Error("RUXA 不支持 Base64 图片传输，请先上传图片后再编辑");
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}
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if (!normalized.startsWith("http")) return;
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if (!imageUrls.includes(normalized)) {
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imageUrls.push(normalized);
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}
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};
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if (typeof lastUserMessage.content === "string") {
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prompt = lastUserMessage.content.trim();
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} else if (Array.isArray(lastUserMessage.content)) {
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for (const part of lastUserMessage.content) {
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if (part?.type === "text" && typeof part.text === "string") {
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prompt = `${prompt} ${part.text}`.trim();
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} else if (part?.type === "image_url" && part.image_url?.url) {
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pushImageUrl(part.image_url.url);
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} else if (part?.type === "file") {
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pushImageUrl(part.url || part.data);
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} else if (part?.type === "image") {
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pushImageUrl(part.image || part.url);
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}
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}
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}
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if (!prompt) {
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throw new Error("No prompt found in user message");
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}
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return { prompt, imageUrls };
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}
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function collectImageUrls(payload: any): string[] {
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const urls = new Set<string>();
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const isImageLikeKey = (key: string) =>
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/image|img|url|output|result|artifact|file/i.test(key);
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const isLikelyImageUrl = (value: string) =>
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/^https?:\/\//i.test(value) &&
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(/\.(png|jpg|jpeg|webp|gif)(\?|$)/i.test(value) || value.includes("image"));
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const walk = (value: any, parentKey = "") => {
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if (typeof value === "string") {
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if (isLikelyImageUrl(value) || (isImageLikeKey(parentKey) && /^https?:\/\//i.test(value))) {
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urls.add(value);
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return;
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}
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const trimmed = value.trim();
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if (
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trimmed.length > 1 &&
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trimmed.length < 200000 &&
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(trimmed.startsWith("{") || trimmed.startsWith("["))
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) {
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try {
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const parsed = JSON.parse(trimmed);
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walk(parsed, parentKey);
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} catch {
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// ignore non-JSON strings
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}
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}
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return;
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}
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if (Array.isArray(value)) {
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for (const item of value) {
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walk(item, parentKey);
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}
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return;
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}
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if (value && typeof value === "object") {
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for (const [key, nestedValue] of Object.entries(value)) {
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walk(nestedValue, key);
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}
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}
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};
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walk(payload);
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return Array.from(urls);
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}
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function detectImageExtension(imageUrl: string, contentType?: string | null) {
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const type = (contentType || "").toLowerCase();
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if (type.includes("jpeg") || type.includes("jpg")) return "jpg";
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if (type.includes("webp")) return "webp";
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if (type.includes("png")) return "png";
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const cleanUrl = imageUrl.split("?")[0]?.toLowerCase() || "";
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if (cleanUrl.endsWith(".jpg") || cleanUrl.endsWith(".jpeg")) return "jpg";
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if (cleanUrl.endsWith(".webp")) return "webp";
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if (cleanUrl.endsWith(".png")) return "png";
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return "png";
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}
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async function createThumbnail(buffer: Buffer): Promise<Buffer> {
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try {
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return await sharp(buffer)
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.resize(400, 400, { fit: "inside", withoutEnlargement: true })
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.jpeg({ quality: 80 })
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.toBuffer();
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} catch (error) {
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console.error("[Ruxa Image] Failed to create thumbnail:", error);
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return buffer;
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}
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}
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function generateFilename(prefix: string, extension: string) {
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const ts = Date.now();
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const rand = Math.random().toString(36).slice(2, 8);
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return `${prefix}-${ts}-${rand}.${extension}`;
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}
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async function downloadAndUploadImage(imageUrl: string): Promise<UploadedImage> {
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const response = await fetch(imageUrl);
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if (!response.ok) {
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throw new Error(`Failed to download image: ${response.status}`);
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}
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const arrayBuffer = await response.arrayBuffer();
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const buffer = Buffer.from(arrayBuffer);
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const thumbnailBuffer = await createThumbnail(buffer);
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const originalExt = detectImageExtension(imageUrl, response.headers.get("content-type"));
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const originalFilename = generateFilename("ruxa-image-orig", originalExt);
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const originalArrayBuffer = buffer.buffer.slice(
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buffer.byteOffset,
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buffer.byteOffset + buffer.byteLength
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) as ArrayBuffer;
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const originalUploaded = await uploadFile(originalFilename, originalArrayBuffer);
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const thumbFilename = generateFilename("ruxa-image-thumb", "jpg");
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const thumbArrayBuffer = thumbnailBuffer.buffer.slice(
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thumbnailBuffer.byteOffset,
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thumbnailBuffer.byteOffset + thumbnailBuffer.byteLength
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) as ArrayBuffer;
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const thumbUploaded = await uploadFile(thumbFilename, thumbArrayBuffer);
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return {
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thumbnail: thumbUploaded.url,
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original: originalUploaded.url,
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};
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}
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async function waitForTaskResult(baseURL: string, apiKey: string, taskId: string, sourceUrls: string[]) {
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const endpointCandidates = [
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(id: string) => joinApiPath(baseURL, `/api/v1/tasks/query/${id}`),
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(id: string) => joinApiPath(baseURL, `/api/v1/tasks/${id}`),
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(id: string) => `${joinApiPath(baseURL, "/api/v1/tasks/query")}?taskId=${encodeURIComponent(id)}`,
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];
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let endpointIndex = 0;
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for (let attempt = 1; attempt <= POLL_MAX_ATTEMPTS; attempt++) {
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try {
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const endpoint = endpointCandidates[endpointIndex]!(taskId);
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const response = await fetch(endpoint, {
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headers: {
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Authorization: `Bearer ${apiKey}`,
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"Content-Type": "application/json",
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},
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});
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if (!response.ok) {
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if (response.status === 404 && endpointIndex < endpointCandidates.length - 1) {
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endpointIndex++;
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}
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await new Promise((resolve) => setTimeout(resolve, POLL_INTERVAL_MS));
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continue;
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}
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const payload = await response.json();
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const imageUrls = filterSourceImages(collectImageUrls(payload), sourceUrls);
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const status = extractStatus(payload);
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if (imageUrls.length > 0) {
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return imageUrls;
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}
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if (status && ["failed", "fail", "error", "cancelled", "canceled"].includes(status)) {
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throw new Error(extractErrorMessage(payload));
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}
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if (status && ["success", "succeeded", "completed", "done", "finished"].includes(status)) {
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throw new Error("任务已完成但未返回图片地址");
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}
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} catch (error) {
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if (error instanceof Error && error.message !== "任务已完成但未返回图片地址") {
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throw error;
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}
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}
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await new Promise((resolve) => setTimeout(resolve, POLL_INTERVAL_MS));
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}
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throw new Error("RUXA 任务超时，请稍后重试");
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}
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function formatMarkdown(images: UploadedImage[], resolution: string) {
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return images
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.map((image) => ``)
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.join("\n\n");
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}
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export function createRuxaImage({ apiKey, baseURL }: RuxaImageConfig) {
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return {
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provider: "ruxa-image",
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chat: (modelId: string) => ({
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provider: "ruxa-image",
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doGenerate: async (options: {
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messages: Array<{ role: string; content: any }>;
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imageParams?: RuxaImageParams;
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overrideModelId?: string;
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}) => {
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const { prompt, imageUrls } = extractPromptAndImages(options.messages);
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const aspectRatio = normalizeAspectRatio(options.imageParams?.aspectRatio);
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const resolution = normalizeResolution(options.imageParams?.imageSize);
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const requestedModelId = options.overrideModelId || modelId || "gpt-image-1.5";
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const activeModelId = normalizeRuxaModelId(requestedModelId);
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const outputFormat = normalizeRuxaOutputFormat(activeModelId, options.imageParams?.outputFormat);
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const isNanoBanana2 = isRuxaNanoBanana2Model(activeModelId);
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const createEndpoint = joinApiPath(baseURL, "/api/v1/tasks/create");
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const callbackUrl = process.env.RUXA_CALLBACK_URL?.trim();
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const input: Record<string, unknown> = {
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prompt,
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output_format: outputFormat,
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};
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if (isNanoBanana2) {
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input.size = aspectRatio || "1:1";
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} else {
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input.resolution = resolution;
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}
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if (aspectRatio && !isNanoBanana2) {
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input.size = aspectRatio;
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input.aspect_ratio = aspectRatio;
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}
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if (imageUrls[0]) {
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input.image = imageUrls[0];
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}
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if (imageUrls.length > 1) {
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input.image_input = imageUrls;
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}
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const requestBody = {
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input,
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model: activeModelId,
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...(callbackUrl ? { callBackUrl: callbackUrl } : {}),
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};
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if (activeModelId !== requestedModelId) {
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console.log("[Ruxa Image] Remapped modelId for provider compatibility:", {
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requestedModelId,
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activeModelId,
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});
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}
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const createResponse = await fetch(createEndpoint, {
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method: "POST",
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headers: {
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Authorization: `Bearer ${apiKey}`,
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"Content-Type": "application/json",
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},
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body: JSON.stringify(requestBody),
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});
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const createRawText = await createResponse.text();
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let createPayload: any = null;
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try {
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createPayload = JSON.parse(createRawText);
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} catch {
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createPayload = createRawText;
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}
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if (!createResponse.ok) {
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throw new Error(
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`${extractErrorMessage(createPayload)} (HTTP ${createResponse.status})`
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);
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}
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const createCode =
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typeof createPayload?.code === "number"
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? createPayload.code
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: Number.isFinite(Number(createPayload?.code))
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? Number(createPayload.code)
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: null;
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if (createCode !== null && createCode !== 200) {
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throw new Error(extractErrorMessage(createPayload));
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}
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let outputUrls = filterSourceImages(collectImageUrls(createPayload), imageUrls);
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if (outputUrls.length === 0) {
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const taskId = extractTaskId(createPayload);
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if (!taskId) {
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throw new Error(
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`RUXA 创建任务成功，但未返回 taskId，响应片段: ${compactPayloadSnippet(createPayload)}`
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);
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}
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outputUrls = await waitForTaskResult(baseURL, apiKey, taskId, imageUrls);
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}
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const uploadedImages: UploadedImage[] = [];
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for (const outputUrl of outputUrls.slice(0, options.imageParams?.imageCount || 1)) {
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uploadedImages.push(await downloadAndUploadImage(outputUrl));
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}
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if (uploadedImages.length === 0) {
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throw new Error("RUXA 未返回可用图片");
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}
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const text = formatMarkdown(uploadedImages, resolution);
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return {
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text,
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finishReason: "stop" as const,
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usage: {
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promptTokens: 0,
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completionTokens: text.length,
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},
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};
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},
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doStream: async function* (options: {
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messages: Array<{ role: string; content: any }>;
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imageParams?: RuxaImageParams;
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overrideModelId?: string;
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}) {
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const result = await this.doGenerate(options);
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yield {
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type: "text-delta",
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textDelta: result.text,
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};
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},
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}),
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};
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}
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