/// <summary>
/// Listen for changes in subfolders
/// </summary>
/// <param name="rootPath">Watching Root Path</param>
/// <param name="onChange">Callback when change</param>
private void SubfolderChangeWatch(string rootPath, Action <IEnumerable <string> > onChange)
{
FileProvider = new PhysicalFileProvider(rootPath);
// 递归查询所有子文件
Files.AddRange(FileProvider.GetDirectoryDepthContents("").Where(f => !f.IsDirectory));
// 监听监听所有文件，当文件发生修改时反应为某个子文件夹的修改，在最后将修改的文件夹路径打印出来
ChangeToken.OnChange(() => FileProvider.Watch("*"), () => // filter Example: **/*.cs, *.*, subFolder/**/*.cshtml.
{
// 查询所有子文件
var files = FileProvider.GetDirectoryDepthContents("").Where(f => !f.IsDirectory);
// 查询变化的文件
var modFiles = Files.Where(a => (!files.Any(b => b.PhysicalPath == a.PhysicalPath)) ||
files.FirstOrDefault(b => b.PhysicalPath == a.PhysicalPath)?.LastModified > a.LastModified)
.Union(files.Where(a => !Files.Any(b => b.PhysicalPath == a.PhysicalPath)))
.Select(f => f.PhysicalPath);
// 查询根目录下的子文件夹
var subfolders = FileProvider.GetDirectoryContents("");
// 查询发生变化的文件夹
var modDirs = subfolders.Select(f => f.PhysicalPath).Where(a => modFiles.Any(b => b.Contains(a)));
// 有文件夹修改则回调
if (modDirs.Any())
{
onChange(modDirs);
}
// 刷新暂存文件列表
Files.Refresh(files);
});
}
