442 lines
14 KiB
TypeScript
442 lines
14 KiB
TypeScript
import React, { useState, useEffect, useRef, useCallback } from "react";
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import { Document, Page } from "react-pdf";
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import "./UI7.css";
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import "../../assets/css/basic.css";
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import { useNavigate } from "react-router-dom";
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import BackButton from "../../components/BackButton";
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import ConfirmButton from "../../components/ConfirmButton";
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import DecorLine from "../../components/DecorLine";
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import WaitButton from "../../components/WaitButton";
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import { getTongyishuPdf, submitDaojiandanSign } from "../../api/hisApi";
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// 独立的 PDF 渲染组件，使用 React.memo 避免不必要的重新渲染
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const PdfRenderer = React.memo<{
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pdfFiles: Uint8Array[];
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loading: boolean;
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error: string;
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pageCounts: Record<number, number>;
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onPageCountUpdate: (index: number, numPages: number) => void;
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loadMessage: string;
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}>(({ pdfFiles, loading, error, pageCounts, onPageCountUpdate, loadMessage }) => {
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return (
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<>
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{loading && (
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<div style={{ padding: "20px", textAlign: "center", fontSize: "32px" }}>
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<span style={{ fontSize: "32px" }}>{loadMessage}</span>
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</div>
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)}
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{error && (
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<div style={{ padding: "20px", color: "red", textAlign: "center" }}>
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{error}
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</div>
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)}
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{!loading &&
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!error &&
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pdfFiles.map((fileData, index) => (
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<div key={index} style={{ marginBottom: "20px" }}>
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<Document
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file={{ data: fileData }}
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loading=""
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onLoadSuccess={({ numPages }) => onPageCountUpdate(index, numPages)}
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>
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{Array.from(
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{ length: pageCounts[index] || 0 },
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(_, pageIndex) => (
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<Page
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key={`pdf-${index}-page-${pageIndex + 1}`}
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pageNumber={pageIndex + 1}
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renderTextLayer={false}
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renderAnnotationLayer={false}
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width={900}
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/>
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)
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)}
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</Document>
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</div>
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))}
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</>
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);
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});
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PdfRenderer.displayName = "PdfRenderer";
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const UI7: React.FC = () => {
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const navigate = useNavigate();
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const hasFetchedRef = useRef(false);
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const canvasRef = useRef<HTMLCanvasElement | null>(null);
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const dprRef = useRef<number>(1);
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const lastPointRef = useRef<{ x: number; y: number } | null>(null);
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const [countdown, setCountdown] = useState(5);
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const [showWaitButton, setShowWaitButton] = useState(true);
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const [pdfFiles, setPdfFiles] = useState<Uint8Array[]>([]);
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const [pageCounts, setPageCounts] =
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useState<Record<number, number>>({});
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const [loading, setLoading] = useState<boolean>(true);
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const [error, setError] = useState<string>("");
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const [loadMessage, setLoadMessage] = useState("PDF加载中...");
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const [isDrawing, setIsDrawing] = useState(false);
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const [isSubmitting, setIsSubmitting] = useState(false);
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// 辅助函数：从 URL 获取 PDF 的 Uint8Array
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const fetchPdfBytes = async (url: string) => {
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try {
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if (window.electronAPI?.fetchPdf) {
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window.electronAPI.log("info", `[UI7] 通过 Electron 获取 PDF: ${url}`);
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const result = await window.electronAPI.fetchPdf(url);
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if (result.success && result.data) {
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const cleanBase64 = result.data.replace(/\s/g, "");
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const binaryString = atob(cleanBase64);
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const bytes = new Uint8Array(binaryString.length);
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for (let i = 0; i < binaryString.length; i++) {
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bytes[i] = binaryString.charCodeAt(i);
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}
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return bytes;
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}
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throw new Error(result.error || "fetchPdf 返回失败");
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}
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window.electronAPI?.log("info", `[UI7] 通过 fetch 获取 PDF: ${url}`);
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const response = await fetch(url);
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if (!response.ok) {
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throw new Error(`网络请求失败: ${response.status}`);
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}
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const arrayBuffer = await response.arrayBuffer();
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return new Uint8Array(arrayBuffer);
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} catch (error) {
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throw new Error(`获取 PDF 失败: ${(error as Error).message}`);
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}
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};
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// 从多份 PDF 中获取数据
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useEffect(() => {
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if (hasFetchedRef.current) {
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window.electronAPI?.log("info", "[UI7] 已获取过 PDF，跳过重复请求");
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return;
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}
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hasFetchedRef.current = true;
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const fetchPdfs = async () => {
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try {
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const res = await getTongyishuPdf(
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Number(localStorage.getItem("selectedExamId"))
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);
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if (res.Status !== 200) {
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alert(`获取PDF数据失败: ${res.Message}`);
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setLoadMessage(res.Message || "获取PDF数据失败");
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return;
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}
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const pdfUrls: string[] = res.Data?.list_pdf_url || [];
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if (!pdfUrls.length) {
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throw new Error("未获取到任何 PDF 链接");
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}
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setLoading(true);
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setError("");
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setPdfFiles([]);
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window.electronAPI?.log("info", "[UI7] 开始获取 PDF 文件");
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const files: Uint8Array[] = [];
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for (let idx = 0; idx < pdfUrls.length; idx++) {
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const url = pdfUrls[idx];
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window.electronAPI?.log(
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"info",
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`[UI7] 下载第 ${idx + 1} 份 PDF: ${url}`
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);
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const pdfBytes = await fetchPdfBytes(url);
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files.push(pdfBytes);
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}
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setPdfFiles(files);
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setLoading(false);
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setError("");
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} catch (err) {
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const errorMsg = `PDF获取失败: ${err}`;
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console.error(errorMsg);
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window.electronAPI?.log("error", `[UI7] ${errorMsg}`);
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setError("PDF 获取失败，请检查文件");
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setLoading(false);
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}
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};
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fetchPdfs();
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}, []);
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useEffect(() => {
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if (countdown > 0) {
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const timer = setTimeout(() => {
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setCountdown(countdown - 1);
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}, 1000);
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return () => clearTimeout(timer);
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} else {
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setShowWaitButton(false);
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}
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}, [countdown]);
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useEffect(() => {
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const initCanvas = () => {
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const canvas = canvasRef.current;
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if (!canvas) return;
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const ctx = canvas.getContext("2d", {
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willReadFrequently: true,
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alpha: true,
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});
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if (!ctx) return;
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const rect = canvas.getBoundingClientRect();
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const scale = 3;
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dprRef.current = scale;
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canvas.width = rect.width * scale;
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canvas.height = rect.height * scale;
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ctx.setTransform(scale, 0, 0, scale, 0, 0);
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canvas.style.width = `${rect.width}px`;
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canvas.style.height = `${rect.height}px`;
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ctx.strokeStyle = "#000000";
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ctx.lineWidth = 10;
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ctx.lineCap = "round";
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ctx.lineJoin = "round";
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ctx.imageSmoothingEnabled = true;
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ctx.imageSmoothingQuality = "high";
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};
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const timer = setTimeout(initCanvas, 150);
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window.addEventListener("resize", initCanvas);
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return () => {
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clearTimeout(timer);
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window.removeEventListener("resize", initCanvas);
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};
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}, []);
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const getCoordinates = useCallback(
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(event: React.PointerEvent<HTMLCanvasElement>) => {
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const canvas = canvasRef.current;
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if (!canvas) return { x: 0, y: 0 };
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const rect = canvas.getBoundingClientRect();
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return {
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x: event.clientX - rect.left,
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y: event.clientY - rect.top,
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};
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},
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[]
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);
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const startDrawing = useCallback(
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(event: React.PointerEvent<HTMLCanvasElement>) => {
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if (event.cancelable) {
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event.preventDefault();
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}
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const canvas = canvasRef.current;
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if (!canvas) return;
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const ctx = canvas.getContext("2d");
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if (!ctx) return;
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const { x, y } = getCoordinates(event);
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lastPointRef.current = { x, y };
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ctx.beginPath();
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ctx.moveTo(x, y);
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setIsDrawing(true);
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canvas.setPointerCapture(event.pointerId);
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},
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[getCoordinates]
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);
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const draw = useCallback(
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(event: React.PointerEvent<HTMLCanvasElement>) => {
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if (event.cancelable) {
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event.preventDefault();
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}
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if (!isDrawing || !lastPointRef.current) return;
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const canvas = canvasRef.current;
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if (!canvas) return;
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const ctx = canvas.getContext("2d");
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if (!ctx) return;
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const { x, y } = getCoordinates(event);
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const lastPoint = lastPointRef.current;
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const midX = (lastPoint.x + x) / 2;
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const midY = (lastPoint.y + y) / 2;
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ctx.quadraticCurveTo(lastPoint.x, lastPoint.y, midX, midY);
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ctx.stroke();
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lastPointRef.current = { x, y };
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},
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[getCoordinates, isDrawing]
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);
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const stopDrawing = useCallback(
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(event?: React.PointerEvent<HTMLCanvasElement>) => {
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setIsDrawing(false);
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lastPointRef.current = null;
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if (event && canvasRef.current?.hasPointerCapture(event.pointerId)) {
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canvasRef.current.releasePointerCapture(event.pointerId);
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}
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},
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[]
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);
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const clearCanvas = useCallback(() => {
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const canvas = canvasRef.current;
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if (!canvas) return;
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const ctx = canvas.getContext("2d");
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if (!ctx) return;
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ctx.save();
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ctx.setTransform(1, 0, 0, 1, 0, 0);
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ctx.clearRect(0, 0, canvas.width, canvas.height);
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ctx.restore();
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ctx.strokeStyle = "#000000";
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ctx.lineWidth = 10;
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ctx.lineCap = "round";
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ctx.lineJoin = "round";
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}, []);
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const isCanvasBlank = useCallback(() => {
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const canvas = canvasRef.current;
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if (!canvas) return true;
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const ctx = canvas.getContext("2d");
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if (!ctx) return true;
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const imageData = ctx.getImageData(0, 0, canvas.width, canvas.height);
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const pixelBuffer = new Uint32Array(imageData.data.buffer);
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return !pixelBuffer.some((color) => color !== 0);
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}, []);
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const canvasToBlob = useCallback((canvas: HTMLCanvasElement) => {
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return new Promise<Blob>((resolve, reject) => {
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canvas.toBlob(
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(blob) => {
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if (blob) {
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resolve(blob);
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} else {
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reject(new Error("签名生成失败，请重试"));
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}
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},
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"image/png",
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1
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);
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});
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}, []);
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const handleBack = useCallback(() => {
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navigate(-1);
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}, [navigate]);
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const handleConfirm = useCallback(() => {
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const execute = async () => {
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if (isSubmitting) {
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return;
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}
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const canvas = canvasRef.current;
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if (!canvas) {
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alert("画布初始化失败，请刷新页面");
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return;
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}
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if (isCanvasBlank()) {
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alert("请先完成签名后再继续");
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return;
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}
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const examIdStr = localStorage.getItem("selectedExamId");
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const examId = Number(examIdStr);
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if (!examIdStr || Number.isNaN(examId)) {
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alert("未找到体检ID，请返回重试");
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return;
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}
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setIsSubmitting(true);
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try {
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const blob = await canvasToBlob(canvas);
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// 仍在本地缓存一下，方便 UI8 等页面复用
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try {
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const dataUrl = canvas.toDataURL("image/png");
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localStorage.setItem("consentSignature", dataUrl);
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} catch (cacheErr) {
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window.electronAPI?.log(
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"warn",
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`[UI7] 签名缓存失败: ${(cacheErr as Error).message}`
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);
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}
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window.electronAPI?.log(
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"info",
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`[UI7] 提交导检单签名，exam_id=${examId}`
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);
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const res = await submitDaojiandanSign(examId, blob);
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if (res.Status !== 200) {
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throw new Error(res.Message || "提交签名失败");
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}
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window.electronAPI?.log("info", "[UI7] 签名提交成功");
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localStorage.setItem("consentSignature", res.Data.pdf_url || "");
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navigate("/UI8");
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} catch (err) {
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const msg = (err as Error).message || "签名提交失败，请稍后重试";
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window.electronAPI?.log("error", `[UI7] ${msg}`);
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alert(msg);
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} finally {
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setIsSubmitting(false);
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}
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};
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execute();
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}, [canvasToBlob, isCanvasBlank, isSubmitting, navigate]);
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// 稳定 PDF 页数更新回调
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const handlePageCountUpdate = useCallback((index: number, numPages: number) => {
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setPageCounts((prev) => {
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if (prev[index] === numPages) return prev;
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return { ...prev, [index]: numPages };
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});
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}, []);
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return (
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<div className="basic-root">
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<div className="basic-white-block">
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<div className="basic-content">
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<span className="basic-title">体检知情同意书确认</span>
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<DecorLine />
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<div className="ui7-text-wrapper">
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<div className="ui7-text-content">
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<PdfRenderer
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pdfFiles={pdfFiles}
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loading={loading}
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error={error}
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pageCounts={pageCounts}
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onPageCountUpdate={handlePageCountUpdate}
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loadMessage={loadMessage}
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/>
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</div>
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</div>
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<span className="ui7-text_4">请阅读后在下方签名确认</span>
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<div className="ui7-signature-wrapper">
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<canvas
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ref={canvasRef}
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className="ui7-signature-canvas"
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onPointerDown={startDrawing}
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onPointerMove={draw}
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onPointerUp={stopDrawing}
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onPointerLeave={stopDrawing}
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onPointerCancel={stopDrawing}
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/>
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<button className="ui7-clear-button" onClick={clearCanvas}>
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清除
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</button>
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</div>
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<div className="basic-confirm-section">
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<BackButton text="返回" onClick={handleBack} />
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{showWaitButton ? (
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<WaitButton text={`等待(${countdown})S`} />
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) : (
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<ConfirmButton
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text={isSubmitting ? "提交中..." : "确定"}
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onClick={handleConfirm}
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/>
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)}
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</div>
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</div>
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</div>
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</div>
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);
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};
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export default UI7;
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