mirror of
https://github.com/basketikun/infinite-canvas.git
synced 2026-08-05 00:34:22 +08:00
HouYunFei
266 lines
14 KiB
TypeScript
266 lines
14 KiB
TypeScript
import crypto from "node:crypto";
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import type { ServerResponse } from "node:http";
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import { type ToolName } from "./schemas.js";
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import { compactCanvasState, compactNode, isToolName, nextCanvasX, parseToolInput } from "./tools.js";
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import type { CanvasNode, CanvasNodeType, CanvasSnapshot } from "./types.js";
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type PendingRequest = { resolve: (value: unknown) => void; reject: (error: Error) => void };
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const SITE_TOOLS = new Set<ToolName>([
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"site_navigate",
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"canvas_list_projects",
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"workbench_image_get_config",
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"workbench_image_generate",
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"workbench_video_get_config",
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"workbench_video_generate",
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"prompts_search",
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"assets_list",
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"assets_add",
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]);
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export class CanvasSession {
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private clients = new Map<string, ServerResponse>();
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private pending = new Map<string, PendingRequest>();
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private canvasState: CanvasSnapshot | null = null;
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health() {
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return { ok: true, hasCanvas: Boolean(this.canvasState), clients: this.clients.size };
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}
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openEvents(url: URL, res: ServerResponse) {
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const clientId = url.searchParams.get("clientId") || crypto.randomUUID();
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const statusOnly = url.searchParams.get("role") === "status";
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res.writeHead(200, { "Content-Type": "text/event-stream", "Cache-Control": "no-cache", Connection: "keep-alive" });
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if (!statusOnly) this.clients.set(clientId, res);
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sendEvent(res, "hello", { ok: true, clientId });
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const timer = setInterval(() => sendEvent(res, "ping", { time: Date.now() }), 15000);
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res.on("close", () => {
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clearInterval(timer);
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if (!statusOnly) this.clients.delete(clientId);
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if (this.canvasState?.clientId === clientId) this.canvasState = null;
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});
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}
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updateState(body: unknown, clientId?: string) {
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this.canvasState = { ...((body && typeof body === "object" && !Array.isArray(body) ? body : {}) as Record<string, unknown>), clientId } as CanvasSnapshot;
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}
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resolveResult(body: { requestId?: string; error?: string; result?: unknown }) {
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const item = body.requestId ? this.pending.get(body.requestId) : null;
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if (!item || !body.requestId) return;
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this.pending.delete(body.requestId);
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body.error ? item.reject(new Error(body.error)) : item.resolve(body.result);
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}
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emitAll(type: string, payload: unknown) {
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this.clients.forEach((client) => sendEvent(client, type, payload));
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}
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async callTool(name: unknown, rawInput: unknown) {
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if (!isToolName(name)) throw new Error(`未知工具：${String(name)}`);
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let tool: ToolName = name;
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let input = parseToolInput(tool, rawInput) as Record<string, unknown>;
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if (SITE_TOOLS.has(tool)) {
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if (!this.clients.size) throw new Error("当前没有已连接网页");
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return await this.requestCanvasTool(tool, input);
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}
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const readTool = ["canvas_get_state", "canvas_get_selection", "canvas_export_snapshot"].includes(tool);
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if (readTool && (!this.clients.size || !this.canvasState)) throw new Error("当前没有已连接画布");
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if (tool === "canvas_get_state" || tool === "canvas_export_snapshot") return compactCanvasState(this.canvasState);
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if (tool === "canvas_get_selection") {
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const ids = new Set(this.canvasState?.selectedNodeIds || []);
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return { nodes: (this.canvasState?.nodes || []).filter((node) => ids.has(node.id)).map(compactNode) };
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}
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if (tool === "canvas_create_node") {
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const data = input as { nodeType: CanvasNodeType; title?: string; x?: number; y?: number; width?: number; height?: number; metadata?: Record<string, unknown> };
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input = { ops: [{ type: "add_node", nodeType: data.nodeType, title: data.title, position: { x: data.x ?? nextCanvasX(this.canvasState), y: data.y ?? 0 }, width: data.width, height: data.height, metadata: data.metadata }] };
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tool = "canvas_apply_ops";
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}
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if (tool === "canvas_create_text_node") {
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const text = input as { text?: string; x?: number; y?: number; title?: string; width?: number; height?: number };
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input = { ops: [textNodeOp(text, text.x ?? nextCanvasX(this.canvasState), text.y ?? 0)] };
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tool = "canvas_apply_ops";
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}
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if (tool === "canvas_create_text_nodes") {
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const data = input as { items: Array<{ text: string; title?: string; x?: number; y?: number; width?: number; height?: number }>; x?: number; y?: number; gap?: number; direction?: "row" | "column" };
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const x = Number(data.x ?? nextCanvasX(this.canvasState));
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const y = Number(data.y ?? 0);
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const gap = Number(data.gap ?? 40);
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input = {
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ops: data.items.map((item, index) => textNodeOp(item, item.x ?? (data.direction === "row" ? x + index * (340 + gap) : x), item.y ?? (data.direction === "row" ? y : y + index * (240 + gap)))),
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};
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tool = "canvas_apply_ops";
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}
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if (tool === "canvas_create_image_prompt_flow") {
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input = { ops: generationFlowOps({ ...(input as Record<string, unknown>), mode: "image" }, this.canvasState) };
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tool = "canvas_apply_ops";
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}
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if (tool === "canvas_create_config_node") {
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const data = input as Record<string, unknown>;
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const x = Number(data.x ?? nextCanvasX(this.canvasState));
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const y = Number(data.y ?? 0);
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const configId = `config-${crypto.randomUUID()}`;
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const mode = generationMode(data.mode);
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const prompt = String(data.prompt || "");
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input = { ops: [configNodeOp(configId, data, x, y), ...(data.autoRun ? [runGenerationOp(configId, mode, prompt)] : [])] };
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tool = "canvas_apply_ops";
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}
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if (tool === "canvas_create_generation_flow") {
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input = { ops: generationFlowOps(input as Record<string, unknown>, this.canvasState) };
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tool = "canvas_apply_ops";
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}
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if (tool === "canvas_generate_text" || tool === "canvas_generate_image" || tool === "canvas_generate_video" || tool === "canvas_generate_audio") {
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input = { ops: generationFlowOps({ ...(input as Record<string, unknown>), mode: tool.replace("canvas_generate_", ""), autoRun: true }, this.canvasState) };
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tool = "canvas_apply_ops";
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}
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if (tool === "canvas_update_node") {
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const data = input as { id: string; patch?: Record<string, unknown>; metadata?: Record<string, unknown> };
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input = { ops: [{ type: "update_node", id: data.id, patch: data.patch, metadata: data.metadata }] };
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tool = "canvas_apply_ops";
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}
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if (tool === "canvas_update_node_text") {
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const data = input as { id: string; text: string; title?: string };
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input = { ops: [{ type: "update_node", id: data.id, patch: { ...(data.title ? { title: data.title } : {}) }, metadata: { content: data.text, status: "success" } }] };
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tool = "canvas_apply_ops";
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}
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if (tool === "canvas_move_nodes") {
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const data = input as { items: Array<{ id: string; x?: number; y?: number; dx?: number; dy?: number }> };
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input = {
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ops: data.items.map((item) => {
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const current = findNode(this.canvasState, item.id);
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return { type: "update_node", id: item.id, patch: { position: { x: item.x ?? ((current?.position.x || 0) + (item.dx || 0)), y: item.y ?? ((current?.position.y || 0) + (item.dy || 0)) } } };
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}),
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};
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tool = "canvas_apply_ops";
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}
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if (tool === "canvas_resize_node") {
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const data = input as { id: string; width: number; height: number; freeResize?: boolean };
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input = { ops: [{ type: "update_node", id: data.id, patch: { width: data.width, height: data.height }, metadata: data.freeResize === undefined ? undefined : { freeResize: data.freeResize } }] };
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tool = "canvas_apply_ops";
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}
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if (tool === "canvas_delete_nodes") {
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input = { ops: [{ type: "delete_node", ids: (input as { ids: string[] }).ids }] };
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tool = "canvas_apply_ops";
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}
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if (tool === "canvas_connect_nodes") {
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const data = input as { connections: Array<{ fromNodeId: string; toNodeId: string }> };
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input = { ops: data.connections.map((connection) => ({ type: "connect_nodes", ...connection })) };
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tool = "canvas_apply_ops";
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}
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if (tool === "canvas_select_nodes") {
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input = { ops: [{ type: "select_nodes", ids: (input as { ids: string[] }).ids }] };
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tool = "canvas_apply_ops";
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}
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if (tool === "canvas_set_viewport") {
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input = { ops: [{ type: "set_viewport", viewport: (input as { viewport: unknown }).viewport }] };
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tool = "canvas_apply_ops";
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}
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if (tool === "canvas_run_generation") {
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const data = input as { nodeId: string; mode?: string; prompt?: string };
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input = { ops: [runGenerationOp(data.nodeId, generationMode(data.mode), data.prompt)] };
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tool = "canvas_apply_ops";
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}
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if (tool !== "canvas_apply_ops") throw new Error(`未知工具：${tool}`);
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if (!this.clients.size) throw new Error("当前没有已连接画布");
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return await this.requestCanvasTool(tool, input);
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}
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private async requestCanvasTool(name: ToolName, input: Record<string, unknown>) {
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const requestId = crypto.randomUUID();
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const client = this.clients.get(this.canvasState?.clientId || "") || this.clients.values().next().value;
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if (!client) throw new Error("当前没有已连接画布");
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sendEvent(client, "tool_call", { requestId, name, input });
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return await new Promise((resolve, reject) => {
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const timer = setTimeout(() => {
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this.pending.delete(requestId);
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reject(new Error("画布操作超时"));
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}, 30000);
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this.pending.set(requestId, { resolve: (value) => (clearTimeout(timer), resolve(value)), reject: (error) => (clearTimeout(timer), reject(error)) });
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});
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}
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}
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function sendEvent(res: ServerResponse, type: string, payload: unknown) {
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res.write(`event: ${type}\ndata: ${JSON.stringify(payload)}\n\n`);
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}
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function textNodeOp(input: { id?: string; text?: string; title?: string; width?: number; height?: number }, x: number, y: number) {
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return { type: "add_node", id: input.id, nodeType: "text", title: input.title, position: { x, y }, width: input.width, height: input.height, metadata: { content: input.text || "", status: "success", fontSize: 14 } };
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}
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function configNodeOp(id: string, input: Record<string, unknown>, x: number, y: number) {
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const mode = generationMode(input.mode);
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const prompt = String(input.prompt || "");
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return {
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type: "add_node",
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id,
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nodeType: "config",
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title: String(input.title || generationTitle(mode)),
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position: { x, y },
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width: typeof input.width === "number" ? input.width : undefined,
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height: typeof input.height === "number" ? input.height : undefined,
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metadata: cleanRecord({
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generationMode: mode,
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composerContent: prompt,
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prompt,
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status: "idle",
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model: input.model,
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size: input.size,
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quality: input.quality,
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count: input.count,
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seconds: input.seconds,
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vquality: input.vquality,
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generateAudio: input.generateAudio,
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watermark: input.watermark,
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audioVoice: input.audioVoice,
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audioFormat: input.audioFormat,
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audioSpeed: input.audioSpeed,
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audioInstructions: input.audioInstructions,
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}),
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};
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}
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function generationFlowOps(input: Record<string, unknown>, state: CanvasSnapshot | null) {
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const mode = generationMode(input.mode);
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const prompt = String(input.prompt || "");
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const x = Number(input.x ?? nextCanvasX(state));
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const y = Number(input.y ?? 0);
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const textId = `text-${crypto.randomUUID()}`;
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const configId = `config-${crypto.randomUUID()}`;
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const referenceNodeIds = Array.isArray(input.referenceNodeIds) ? input.referenceNodeIds.filter((id): id is string => typeof id === "string") : [];
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const tokens = [`@[node:${textId}]`, ...referenceNodeIds.map((id) => `@[node:${id}]`)];
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const configInput = { ...input, prompt: tokens.join("\n") };
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return [
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textNodeOp({ id: textId, text: prompt, title: String(input.title || "提示词") }, x, y),
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configNodeOp(configId, configInput, x + 420, y),
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{ type: "connect_nodes", fromNodeId: textId, toNodeId: configId },
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...referenceNodeIds.map((fromNodeId) => ({ type: "connect_nodes", fromNodeId, toNodeId: configId })),
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{ type: "select_nodes", ids: [configId] },
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...(input.autoRun ? [runGenerationOp(configId, mode, tokens.join("\n"))] : []),
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];
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}
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function runGenerationOp(nodeId: string, mode: "text" | "image" | "video" | "audio", prompt?: string) {
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return { type: "run_generation", nodeId, mode, prompt };
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}
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function generationMode(value: unknown): "text" | "image" | "video" | "audio" {
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return value === "text" || value === "video" || value === "audio" ? value : "image";
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}
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function generationTitle(mode: "text" | "image" | "video" | "audio") {
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if (mode === "text") return "文本生成";
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if (mode === "video") return "视频生成";
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if (mode === "audio") return "音频生成";
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return "图片生成";
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}
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function findNode(state: CanvasSnapshot | null, id: string): CanvasNode | undefined {
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return (state?.nodes || []).find((node) => node.id === id);
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}
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function cleanRecord(value: Record<string, unknown>) {
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return Object.fromEntries(Object.entries(value).filter(([, item]) => item !== undefined && item !== ""));
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}
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