71 lines
3.5 KiB
C#
71 lines
3.5 KiB
C#
using dy.net.model.dto;
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using System.Text.RegularExpressions;
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namespace dy.net.utils
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{
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/// <summary>
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/// 视频标题模板生成器
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/// </summary>
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public static class VideoTitleGenerator
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{
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/// <summary>
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/// 根据用户模板和原始数据生成最终标题
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/// </summary>
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/// <param name="template">用户设置的模板（如 "视频_{id}_{VideoTitle}_{ReleaseTime}"）</param>
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/// <param name="data">标题所需的原始数据</param>
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/// <param name="timeFormat">时间字段格式化（默认：yyyy-MM-dd HH:mm:ss）</param>
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/// <param name="emptyPlaceholder">占位符对应数据为空时的替换值（默认：空字符串）</param>
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/// <returns>生成的最终标题</returns>
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/// <exception cref="ArgumentNullException">模板为空时抛出</exception>
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public static string Generate(
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string template,
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VideoTitleDataTemplate data,
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string timeFormat = "yyyyMMdd",
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string emptyPlaceholder = "")
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{
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// 校验入参
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if (string.IsNullOrWhiteSpace(template))
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throw new ArgumentNullException(nameof(template), "标题模板不能为空");
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data ??= new VideoTitleDataTemplate(); // 避免数据为空
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// 1. 定义占位符与数据的映射关系（key：占位符名称，value：格式化后的值）
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var placeholderMap = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase)
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{
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// 普通字段
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["Id"] = data.Id.ToString(),
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["VideoTitle"] = string.IsNullOrWhiteSpace(DouyinFileNameHelper.KeepChineseLettersAndNumbers(data.VideoTitle)) ? emptyPlaceholder : DouyinFileNameHelper.KeepChineseLettersAndNumbers(data.VideoTitle),
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["FileHash"] = string.IsNullOrWhiteSpace(data.FileHash) ? emptyPlaceholder : data.FileHash,
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["Resolution"] = string.IsNullOrWhiteSpace(data.Resolution) ? emptyPlaceholder : data.Resolution,
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["Author"] = string.IsNullOrWhiteSpace(DouyinFileNameHelper.KeepChineseLettersAndNumbers(data.Author)) ? emptyPlaceholder : DouyinFileNameHelper.KeepChineseLettersAndNumbers(data.Author),
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// 时间字段（支持空值处理）
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//["SyncTime"] = data.SyncTime.HasValue ? data.SyncTime.Value.ToString(timeFormat) : emptyPlaceholder,
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["ReleaseTime"] = data.ReleaseTime.HasValue ? data.ReleaseTime.Value.ToString(timeFormat) : emptyPlaceholder,
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// 文件大小（自动格式化：字节→KB/MB/GB，保留1位小数）
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//["FileSize"] = FormatFileSize(data.FileSize) ?? emptyPlaceholder
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};
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// 2. 正则匹配模板中的占位符（{占位符名称}），并替换
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var regex = new Regex(@"\{(?<key>[a-zA-Z0-9]+)\}", RegexOptions.Compiled);
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var finalTitle = regex.Replace(template, match =>
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{
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var placeholderKey = match.Groups["key"].Value;
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// 存在对应映射则替换，否则保留原占位符（避免替换错误）
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return placeholderMap.TryGetValue(placeholderKey, out var value) ? value : match.Value;
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});
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var fullName = finalTitle.Replace("--", "-");
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if (fullName.Length > 60)
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{
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return fullName.Substring(0, 60);
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}
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else
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{
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return fullName;
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}
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}
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}
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}
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