660 lines
20 KiB
TypeScript
660 lines
20 KiB
TypeScript
import "server-only";
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import JSZip from "jszip";
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import { createMediaAssetRelation, getMediaAssetsByUserAndUrls, getSystemSetting, upsertMediaAsset } from "@/lib/db/queries";
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import { db } from "@/lib/db";
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import { generatedImage } from "@/lib/db/schema";
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import { uploadFile } from "@/lib/storage/service";
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const LAYER_SPLIT_CONFIG_KEY = "layer_split_config";
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const DEFAULT_REPLICATE_BASE_URL = "https://api.replicate.com/v1";
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const DEFAULT_LAYER_SPLIT_MODEL = "qwen/qwen-image-layered";
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const DEFAULT_LAYERS = 4;
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const DEFAULT_RESOLUTION = 640;
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const DEFAULT_TRUE_CFG_SCALE = 4;
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const DEFAULT_INFERENCE_STEPS = 30;
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const DEFAULT_TIMEOUT_MS = 5 * 60 * 1000;
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type LayerSplitConfig = {
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enabled?: boolean;
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provider?: "replicate";
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replicateApiToken?: string;
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replicateModel?: string;
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layers?: number;
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resolution?: number;
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trueCfgScale?: number;
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numInferenceSteps?: number;
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cfgNormalize?: boolean;
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useEnPrompt?: boolean;
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negativePrompt?: string;
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timeoutMs?: number;
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};
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type LayerSplitParams = {
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userId: string;
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imageUrl: string;
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prompt?: string;
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chatId?: string | null;
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messageId?: string | null;
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sourceNodeId?: string | null;
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skipGallerySave?: boolean;
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};
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type ReplicatePredictionResponse = {
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id?: string;
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status?: string;
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output?: unknown;
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error?: string;
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detail?: string;
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message?: string;
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urls?: {
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get?: string;
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};
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};
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export type LayerSplitResultItem = {
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originalUrl: string;
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thumbnailUrl: string;
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generatedImageId?: string | null;
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mediaAssetId?: string | null;
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title: string;
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layerIndex: number;
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totalLayers: number;
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};
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export type ExecuteLayerSplitJobResult = {
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layers: LayerSplitResultItem[];
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provider: "replicate";
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model: string;
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processingTime: number;
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};
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export class LayerSplitServiceError extends Error {
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status: number;
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detail?: string;
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constructor(message: string, status = 500, detail?: string) {
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super(message);
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this.name = "LayerSplitServiceError";
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this.status = status;
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this.detail = detail;
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}
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}
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function trimString(value: unknown) {
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return String(value || "").trim();
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}
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function splitReplicateModelIdentifier(modelId: string) {
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const [owner, ...rest] = modelId.split("/").filter(Boolean);
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const name = rest.join("/");
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if (!owner || !name) {
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throw new LayerSplitServiceError(`无效的 Replicate 模型标识：${modelId}`, 400);
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}
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return { owner, name };
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}
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function normalizeLayerSplitConfig(value: unknown): Required<LayerSplitConfig> {
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const raw =
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value && typeof value === "object" && !Array.isArray(value)
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? (value as Record<string, unknown>)
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: {};
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return {
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enabled: raw.enabled === true,
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provider: "replicate",
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replicateApiToken: trimString(raw.replicateApiToken),
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replicateModel: trimString(raw.replicateModel) || DEFAULT_LAYER_SPLIT_MODEL,
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layers: Math.max(2, Math.min(12, Math.round(Number(raw.layers) || DEFAULT_LAYERS))),
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resolution: Math.max(256, Math.min(1536, Math.round(Number(raw.resolution) || DEFAULT_RESOLUTION))),
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trueCfgScale: Math.max(1, Math.min(12, Number(raw.trueCfgScale) || DEFAULT_TRUE_CFG_SCALE)),
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numInferenceSteps: Math.max(
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1,
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Math.min(80, Math.round(Number(raw.numInferenceSteps) || DEFAULT_INFERENCE_STEPS))
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),
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cfgNormalize: raw.cfgNormalize !== false,
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useEnPrompt: raw.useEnPrompt !== false,
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negativePrompt: trimString(raw.negativePrompt),
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timeoutMs: Math.max(30_000, Math.min(15 * 60_000, Math.round(Number(raw.timeoutMs) || DEFAULT_TIMEOUT_MS))),
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};
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}
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async function getValidatedLayerSplitConfig() {
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const setting = await getSystemSetting({ key: LAYER_SPLIT_CONFIG_KEY });
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const config = normalizeLayerSplitConfig(setting?.value);
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if (!config.enabled) {
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throw new LayerSplitServiceError("图层拆分功能未启用，请先在本地AI设置中开启", 400);
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}
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if (!config.replicateApiToken) {
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throw new LayerSplitServiceError("未配置 Replicate API Token，请先在本地AI设置中保存", 400);
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}
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return config;
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}
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function toReplicateErrorMessage(payload: any, fallback: string) {
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const message = trimString(payload?.detail || payload?.error || payload?.message);
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return message || fallback;
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}
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function shouldRetryWithAlternativeInput(errorMessage: string) {
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const normalized = errorMessage.toLowerCase();
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return (
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normalized.includes("validation") ||
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normalized.includes("schema") ||
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normalized.includes("image") ||
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normalized.includes("input") ||
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normalized.includes("field")
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);
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}
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async function createPrediction(params: {
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apiKey: string;
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modelId: string;
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input: Record<string, unknown>;
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}) {
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const { owner, name } = splitReplicateModelIdentifier(params.modelId);
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const endpoint = `${DEFAULT_REPLICATE_BASE_URL}/models/${encodeURIComponent(owner)}/${encodeURIComponent(name)}/predictions`;
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const response = await fetch(endpoint, {
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method: "POST",
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headers: {
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Authorization: `Bearer ${params.apiKey}`,
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"Content-Type": "application/json",
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Prefer: "wait=5",
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},
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body: JSON.stringify({ input: params.input }),
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cache: "no-store",
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});
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const payload = (await response.json().catch(() => null)) as ReplicatePredictionResponse | null;
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return { response, payload };
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}
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async function pollPrediction(params: {
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apiKey: string;
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taskId?: string;
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pollingUrl?: string;
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timeoutMs: number;
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}): Promise<ReplicatePredictionResponse> {
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const deadline = Date.now() + params.timeoutMs;
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let lastMessage = "";
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while (Date.now() < deadline) {
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const taskId = trimString(params.taskId);
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const url =
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trimString(params.pollingUrl) ||
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`${DEFAULT_REPLICATE_BASE_URL}/predictions/${encodeURIComponent(taskId)}`;
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const response = await fetch(url, {
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method: "GET",
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headers: {
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Authorization: `Bearer ${params.apiKey}`,
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Accept: "application/json",
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},
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cache: "no-store",
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});
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const payload = (await response.json().catch(() => null)) as ReplicatePredictionResponse | null;
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const status = trimString(payload?.status).toLowerCase();
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if (status) {
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lastMessage = status;
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}
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if (response.ok && status === "succeeded") {
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return payload || {};
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}
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if (status === "failed" || status === "canceled") {
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throw new LayerSplitServiceError(
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"图层拆分任务失败",
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502,
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toReplicateErrorMessage(payload, "Replicate 任务执行失败")
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);
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}
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if (!response.ok) {
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throw new LayerSplitServiceError(
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`图层拆分轮询失败（${response.status}）`,
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502,
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toReplicateErrorMessage(payload, `Replicate 轮询失败（${response.status}）`)
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);
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}
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await new Promise((resolve) => setTimeout(resolve, 600));
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}
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throw new LayerSplitServiceError(
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"图层拆分任务超时",
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504,
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`Replicate 轮询超时${lastMessage ? `（${lastMessage}）` : ""}`
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);
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}
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function collectArtifactStrings(value: unknown, bucket: string[] = []): string[] {
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if (typeof value === "string") {
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const next = trimString(value);
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if (next) bucket.push(next);
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return bucket;
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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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collectArtifactStrings(item, bucket);
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}
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return bucket;
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}
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if (value && typeof value === "object") {
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for (const [key, item] of Object.entries(value as Record<string, unknown>)) {
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if (
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key === "url" ||
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key === "href" ||
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key === "download" ||
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key === "file" ||
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key === "image" ||
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key === "get" ||
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key === "output" ||
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key === "outputs" ||
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key === "layers" ||
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key === "files" ||
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key === "result"
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) {
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collectArtifactStrings(item, bucket);
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}
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}
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}
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return bucket;
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}
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function dedupeStrings(values: string[]) {
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return Array.from(new Set(values.map((value) => trimString(value)).filter(Boolean)));
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}
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function extFromFilename(filename: string): string {
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const clean = trimString(filename).split("?")[0];
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const ext = clean.split(".").pop()?.toLowerCase() || "";
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return ext;
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}
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function deriveFilenameFromUrl(url: string, fallback: string) {
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try {
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const parsed = new URL(url);
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const candidate = parsed.pathname.split("/").pop() || "";
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return candidate || fallback;
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} catch {
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return fallback;
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}
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}
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function detectMimeType(buffer: Buffer, fallback?: string): string {
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if (buffer.length >= 8 && buffer.subarray(0, 8).equals(Buffer.from([0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a]))) {
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return "image/png";
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}
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if (buffer.length >= 3 && buffer[0] === 0xff && buffer[1] === 0xd8 && buffer[2] === 0xff) {
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return "image/jpeg";
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}
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if (buffer.length >= 12 && buffer.toString("ascii", 0, 4) === "RIFF" && buffer.toString("ascii", 8, 12) === "WEBP") {
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return "image/webp";
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}
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if (buffer.length >= 4 && buffer.toString("ascii", 0, 4) === "PK\u0003\u0004") {
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return "application/zip";
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}
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if (buffer.length >= 4 && buffer.toString("ascii", 0, 4) === "8BPS") {
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return "image/vnd.adobe.photoshop";
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}
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const normalizedFallback = trimString(fallback).toLowerCase();
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if (normalizedFallback.startsWith("image/")) return normalizedFallback;
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if (normalizedFallback === "application/zip") return normalizedFallback;
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return "application/octet-stream";
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}
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function extFromMimeType(mimeType: string) {
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if (mimeType === "image/png") return "png";
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if (mimeType === "image/jpeg") return "jpg";
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if (mimeType === "image/webp") return "webp";
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if (mimeType === "application/zip") return "zip";
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if (mimeType === "image/vnd.adobe.photoshop") return "psd";
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return "bin";
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}
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async function fetchArtifact(url: string): Promise<{ buffer: Buffer; mimeType: string; filename: string }> {
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const response = await fetch(url, {
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headers: {
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"User-Agent": "AI-Chatbot-LayerSplit/1.0",
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},
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cache: "no-store",
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});
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if (!response.ok) {
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throw new LayerSplitServiceError(
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`下载图层拆分结果失败（${response.status}）`,
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502,
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`${response.status} ${response.statusText}`
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);
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}
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const contentType = trimString(response.headers.get("content-type"));
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const buffer = Buffer.from(await response.arrayBuffer());
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const filename = deriveFilenameFromUrl(url, `artifact.${extFromMimeType(contentType || "application/octet-stream")}`);
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const mimeType = detectMimeType(buffer, contentType);
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return { buffer, mimeType, filename };
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}
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async function extractLayerBuffersFromZip(zipBuffer: Buffer): Promise<Array<{ buffer: Buffer; filename: string; mimeType: string }>> {
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const zip = await JSZip.loadAsync(zipBuffer);
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const entries: Array<{ buffer: Buffer; filename: string; mimeType: string }> = [];
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for (const [name, file] of Object.entries(zip.files)) {
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if (file.dir) continue;
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const ext = extFromFilename(name);
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if (!["png", "jpg", "jpeg", "webp"].includes(ext)) continue;
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const fileBuffer = await file.async("nodebuffer");
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const mimeType = detectMimeType(fileBuffer, ext === "png" ? "image/png" : ext === "webp" ? "image/webp" : "image/jpeg");
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if (!mimeType.startsWith("image/")) continue;
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entries.push({
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buffer: fileBuffer,
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filename: name.split("/").pop() || `layer-${entries.length + 1}.${ext || "png"}`,
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mimeType,
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});
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}
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return entries;
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}
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async function resolveLayerArtifacts(payload: ReplicatePredictionResponse): Promise<Array<{ buffer: Buffer; filename: string; mimeType: string }>> {
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const artifacts = dedupeStrings(collectArtifactStrings(payload?.output ?? payload));
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if (artifacts.length === 0) {
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throw new LayerSplitServiceError("图层拆分未返回任何可用结果", 502);
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}
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const imageEntries: Array<{ buffer: Buffer; filename: string; mimeType: string }> = [];
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for (const artifact of artifacts) {
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if (artifact.startsWith("data:")) {
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const match = artifact.match(/^data:([^;,]+)?;base64,(.+)$/i);
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if (!match) continue;
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const mimeType = detectMimeType(Buffer.from(match[2], "base64"), match[1] || "image/png");
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const buffer = Buffer.from(match[2], "base64");
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if (mimeType.startsWith("image/")) {
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imageEntries.push({
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buffer,
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mimeType,
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filename: `layer-${imageEntries.length + 1}.${extFromMimeType(mimeType)}`,
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});
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continue;
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}
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if (mimeType === "application/zip") {
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const zipped = await extractLayerBuffersFromZip(buffer);
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imageEntries.push(...zipped);
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}
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continue;
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}
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if (!/^https?:\/\//i.test(artifact)) continue;
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const downloaded = await fetchArtifact(artifact);
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if (downloaded.mimeType.startsWith("image/")) {
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imageEntries.push(downloaded);
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continue;
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}
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if (downloaded.mimeType === "application/zip") {
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const zipped = await extractLayerBuffersFromZip(downloaded.buffer);
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imageEntries.push(...zipped);
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continue;
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}
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}
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if (imageEntries.length === 0) {
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throw new LayerSplitServiceError("图层拆分返回了结果文件，但未找到可回画布的图片图层", 502);
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}
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return imageEntries;
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}
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async function createThumbnail(buffer: Buffer, mimeType: string): Promise<Buffer> {
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try {
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const sharp = await import("sharp");
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const pipeline = sharp.default(buffer).resize(500, null, {
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fit: "inside",
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withoutEnlargement: true,
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});
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if (mimeType === "image/jpeg") {
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return await pipeline.jpeg({ quality: 82 }).toBuffer();
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}
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if (mimeType === "image/webp") {
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return await pipeline.webp({ quality: 82 }).toBuffer();
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}
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return await pipeline.png({ compressionLevel: 8 }).toBuffer();
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} catch (error) {
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console.error("[LayerSplit] Failed to create thumbnail:", error);
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return buffer;
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}
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}
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async function uploadBufferPair(buffer: Buffer, mimeType: string, prefix: string) {
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const ext = extFromMimeType(mimeType);
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const timestamp = Date.now();
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const random = Math.random().toString(36).slice(2, 8);
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const thumbFilename = `${prefix}-thumb-${timestamp}-${random}.${ext}`;
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const origFilename = `${prefix}-orig-${timestamp}-${random}.${ext}`;
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const thumbnailBuffer = await createThumbnail(buffer, mimeType);
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const thumbnailArrayBuffer = 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 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 [thumbnailResult, originalResult] = await Promise.all([
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uploadFile(thumbFilename, thumbnailArrayBuffer),
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uploadFile(origFilename, originalArrayBuffer),
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]);
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return {
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thumbnail: thumbnailResult.url,
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original: originalResult.url,
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};
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}
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async function runReplicateLayerSplit(params: {
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apiKey: string;
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modelId: string;
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imageUrl: string;
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config: Required<LayerSplitConfig>;
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prompt?: string;
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}): Promise<ReplicatePredictionResponse> {
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const baseInput: Record<string, unknown> = {
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max_num_layers: params.config.layers,
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resolution: params.config.resolution,
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true_cfg_scale: params.config.trueCfgScale,
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num_inference_steps: params.config.numInferenceSteps,
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cfg_normalize: params.config.cfgNormalize,
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use_en_prompt: params.config.useEnPrompt,
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};
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const negativePrompt = trimString(params.config.negativePrompt);
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if (negativePrompt) {
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baseInput.negative_prompt = negativePrompt;
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}
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const prompt = trimString(params.prompt);
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if (prompt) {
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baseInput.prompt = prompt;
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}
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const candidateInputs = [
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{ ...baseInput, image: params.imageUrl },
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{ ...baseInput, input_image: params.imageUrl },
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{ ...baseInput, images: [params.imageUrl] },
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];
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let lastPayload: ReplicatePredictionResponse | null = null;
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let lastError = "";
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for (let index = 0; index < candidateInputs.length; index += 1) {
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const { response, payload } = await createPrediction({
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apiKey: params.apiKey,
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modelId: params.modelId,
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input: candidateInputs[index],
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});
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lastPayload = payload;
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||
|
||
if (
|
||
response.ok &&
|
||
(trimString(payload?.status) === "succeeded" || trimString(payload?.id) || trimString(payload?.urls?.get))
|
||
) {
|
||
if (trimString(payload?.status).toLowerCase() === "succeeded") {
|
||
return payload || {};
|
||
}
|
||
return await pollPrediction({
|
||
apiKey: params.apiKey,
|
||
taskId: trimString(payload?.id),
|
||
pollingUrl: trimString(payload?.urls?.get),
|
||
timeoutMs: params.config.timeoutMs,
|
||
});
|
||
}
|
||
|
||
const errorMessage = toReplicateErrorMessage(payload, `Replicate 请求失败（${response.status}）`);
|
||
lastError = errorMessage;
|
||
|
||
if (response.status === 401 || response.status === 403) {
|
||
throw new LayerSplitServiceError("Replicate API Token 无效或无权限", 401, errorMessage);
|
||
}
|
||
|
||
if (response.status === 404) {
|
||
throw new LayerSplitServiceError(`Replicate 模型不存在：${params.modelId}`, 400, errorMessage);
|
||
}
|
||
|
||
if (index < candidateInputs.length - 1 && shouldRetryWithAlternativeInput(errorMessage)) {
|
||
continue;
|
||
}
|
||
}
|
||
|
||
throw new LayerSplitServiceError(
|
||
"图层拆分请求失败",
|
||
502,
|
||
lastError || toReplicateErrorMessage(lastPayload || {}, "Replicate 请求失败")
|
||
);
|
||
}
|
||
|
||
export async function executeLayerSplitJob(params: LayerSplitParams): Promise<ExecuteLayerSplitJobResult> {
|
||
const startedAt = Date.now();
|
||
const config = await getValidatedLayerSplitConfig();
|
||
|
||
const payload = await runReplicateLayerSplit({
|
||
apiKey: config.replicateApiToken,
|
||
modelId: config.replicateModel,
|
||
imageUrl: params.imageUrl,
|
||
config,
|
||
prompt: params.prompt,
|
||
});
|
||
|
||
const layerBuffers = await resolveLayerArtifacts(payload);
|
||
const totalLayers = layerBuffers.length;
|
||
const sourceAssets = await getMediaAssetsByUserAndUrls({
|
||
userId: params.userId,
|
||
urls: [params.imageUrl],
|
||
}).catch(() => []);
|
||
|
||
const results: LayerSplitResultItem[] = [];
|
||
|
||
for (let index = 0; index < layerBuffers.length; index += 1) {
|
||
const layer = layerBuffers[index];
|
||
const uploadResult = await uploadBufferPair(layer.buffer, layer.mimeType, `layer-split-${index + 1}`);
|
||
let generatedImageId: string | null = null;
|
||
let mediaAssetId: string | null = null;
|
||
|
||
if (!params.skipGallerySave) {
|
||
const [savedImage] = await db
|
||
.insert(generatedImage)
|
||
.values({
|
||
userId: params.userId,
|
||
chatId: params.chatId || null,
|
||
messageId: params.messageId || null,
|
||
thumbnailUrl: uploadResult.thumbnail,
|
||
originalUrl: uploadResult.original,
|
||
prompt: params.prompt || `图层拆分 ${index + 1}/${totalLayers}`,
|
||
modelId: config.replicateModel,
|
||
createdAt: new Date(),
|
||
})
|
||
.returning({ id: generatedImage.id });
|
||
generatedImageId = savedImage?.id || null;
|
||
|
||
const media = await upsertMediaAsset({
|
||
userId: params.userId,
|
||
chatId: params.chatId || null,
|
||
mediaType: "image",
|
||
sourceType: "edited",
|
||
status: "ready",
|
||
originalUrl: uploadResult.original,
|
||
previewUrl: uploadResult.original,
|
||
thumbnailUrl: uploadResult.thumbnail,
|
||
displayName: `图层拆分 ${index + 1}/${totalLayers}`.slice(0, 80),
|
||
prompt: params.prompt || `图层拆分 ${index + 1}/${totalLayers}`,
|
||
modelId: config.replicateModel,
|
||
sourceMessageId: params.messageId || null,
|
||
sourceTable: "GeneratedImage",
|
||
sourceRowId: generatedImageId,
|
||
sourceNodeId: params.sourceNodeId || null,
|
||
primaryParentAssetId: sourceAssets[0]?.id ?? null,
|
||
metadata: {
|
||
layerIndex: index + 1,
|
||
totalLayers,
|
||
provider: "replicate",
|
||
model: config.replicateModel,
|
||
sourceImageUrl: params.imageUrl,
|
||
sourceFilename: layer.filename,
|
||
},
|
||
});
|
||
mediaAssetId = media?.id || null;
|
||
|
||
if (media && sourceAssets.length > 0) {
|
||
for (const sourceAsset of sourceAssets) {
|
||
await createMediaAssetRelation({
|
||
userId: params.userId,
|
||
fromAssetId: sourceAsset.id,
|
||
toAssetId: media.id,
|
||
relationType: "edited_from",
|
||
chatId: params.chatId || null,
|
||
sourceMessageId: params.messageId || null,
|
||
sourceNodeId: params.sourceNodeId || null,
|
||
metadata: {
|
||
tool: "layer_split",
|
||
layerIndex: index + 1,
|
||
totalLayers,
|
||
},
|
||
}).catch(() => null);
|
||
}
|
||
}
|
||
}
|
||
|
||
results.push({
|
||
originalUrl: uploadResult.original,
|
||
thumbnailUrl: uploadResult.thumbnail,
|
||
generatedImageId,
|
||
mediaAssetId,
|
||
title: `图层${index + 1}`,
|
||
layerIndex: index + 1,
|
||
totalLayers,
|
||
});
|
||
}
|
||
|
||
return {
|
||
layers: results,
|
||
provider: "replicate",
|
||
model: config.replicateModel,
|
||
processingTime: (Date.now() - startedAt) / 1000,
|
||
};
|
||
}
|