121 lines
5.5 KiB
C#
121 lines
5.5 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using QuestPDF.Fluent;
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using QuestPDF.Helpers;
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using QuestPDF.Infrastructure;
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using YD_Event.Core.Entities;
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using System.Text.Json;
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namespace YD_Event.Core.Certificate
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{
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/// <summary>
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/// 动态证书生成文档
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/// </summary>
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public class CertificateDocument : IDocument
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{
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private readonly Entities.Certificate _certificate;
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private readonly Dictionary<string, object> _data;
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private readonly byte[] _templateBytes;
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public CertificateDocument(Entities.Certificate certificate, Dictionary<string, object> data, byte[] templateBytes)
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{
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_certificate = certificate;
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_data = data;
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_templateBytes = templateBytes;
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}
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public DocumentMetadata GetMetadata() => DocumentMetadata.Default;
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public void Compose(IDocumentContainer container)
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{
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container.Page(page =>
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{
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// 设置页面大小
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page.Size(new PageSize((float)_certificate.Width, (float)_certificate.Height));
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page.Margin(0); // 无边距，背景铺满
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page.DefaultTextStyle(x => x.FontFamily("Source Han Sans CN")); // 默认字体
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// 设置背景
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page.Background().Image(_templateBytes);
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// 内容层
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page.Content().Layers(layers =>
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{
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// 解析占位符配置
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var placeholders = string.IsNullOrEmpty(_certificate.Placeholders)
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? new List<CertificatePlaceholder>()
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: JsonSerializer.Deserialize<List<CertificatePlaceholder>>(_certificate.Placeholders);
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foreach (var p in placeholders)
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{
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// 获取数据对象
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var dataObj = _data.ContainsKey(p.Key) ? _data[p.Key] : null;
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if (dataObj == null) continue;
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// 定位层
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layers.Layer()
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.TranslateX(p.X)
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.TranslateY(p.Y)
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.Width(p.Width)
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.Height(p.Height)
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.Element(element =>
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{
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if (p.Type == "Image")
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{
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if (dataObj is byte[] imgBytes)
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{
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element.Image(imgBytes);
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}
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else if (dataObj is string url && !string.IsNullOrEmpty(url))
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{
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// 暂不支持直接URL渲染，需预先下载转为byte[]
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element.Border(1).BorderColor(Colors.Red.Medium).AlignCenter().AlignMiddle().Text($"Image: {p.Key}");
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}
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}
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else if (p.Type == "QRCode")
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{
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// 暂无二维码生成库，显示占位符
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// 实际项目建议引入 QRCoder 或类似库生成 byte[] 后渲染
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element.Border(1).BorderColor(Colors.Black).AlignCenter().AlignMiddle().Text("QR Code");
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}
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else
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{
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// 文本处理
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string value = dataObj.ToString();
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// 处理日期格式化
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if (!string.IsNullOrEmpty(p.FormatString))
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{
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if (dataObj is DateTime dt)
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{
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value = dt.ToString(p.FormatString);
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}
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else if (DateTime.TryParse(value, out var dtParsed))
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{
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value = dtParsed.ToString(p.FormatString);
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}
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}
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var text = element.Text(value);
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// 样式设置
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var style = TextStyle.Default.FontSize(p.FontSize > 0 ? p.FontSize : 12);
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if (!string.IsNullOrEmpty(p.FontFamily)) style = style.FontFamily(p.FontFamily);
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if (!string.IsNullOrEmpty(p.Color)) style = style.FontColor(p.Color);
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text.Style(style);
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// 对齐方式
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if (p.TextAlign == "Center") element.AlignCenter();
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else if (p.TextAlign == "Right") element.AlignRight();
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else element.AlignLeft();
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}
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});
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}
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});
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});
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}
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}
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}
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