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DeviceFactory.cs
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DeviceFactory.cs
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using System.Net;
using System.Text.RegularExpressions;
using OnvifDiscovery.Models;
namespace OnvifDiscovery.Common;
internal static class DeviceFactory
{
private const int RegexProcessingTimeoutInMs = 500;
internal static DiscoveryDevice CreateDevice(ProbeMatch probeMatch, IPEndPoint remoteEndpoint) =>
new(
ConvertToList(probeMatch.Types),
ConvertToList(probeMatch.XAddrs),
ParseModelFromScopes(probeMatch.Scopes),
ParseMfrFromScopes(probeMatch.Scopes),
remoteEndpoint.Address.ToString(),
ConvertToList(probeMatch.Scopes)
);
private static string ParseModelFromScopes(string scopes)
{
var model = Regex.Match(scopes, "(?<=hardware/).*?(?= )", RegexOptions.None,
TimeSpan.FromMilliseconds(RegexProcessingTimeoutInMs)).Value;
return Uri.UnescapeDataString(model);
}
private static string ParseMfrFromScopes(string scopes)
{
var scopesArray = scopes.Split();
var nameQuery = scopesArray.Where(scope => scope.Contains("name/")).ToArray();
var mfrQuery = scopesArray.Where(scope => scope.Contains("mfr/") || scope.Contains("manufacturer/"))
.ToArray();
if (mfrQuery.Length > 0)
{
var mfrMatch = Regex.Match(mfrQuery[0], Constants.PATTERN, RegexOptions.None,
TimeSpan.FromMilliseconds(RegexProcessingTimeoutInMs));
return Uri.UnescapeDataString(mfrMatch.Groups[6].Value);
}
if (nameQuery.Length <= 0)
{
return string.Empty;
}
var nameMatch = Regex.Match(nameQuery[0], Constants.PATTERN, RegexOptions.None,
TimeSpan.FromMilliseconds(RegexProcessingTimeoutInMs));
var mfr = Uri.UnescapeDataString(nameMatch.Groups[6].Value);
if (mfr.Contains(' '))
{
mfr = mfr.Split()[0];
}
return mfr;
}
private static IEnumerable<string> ConvertToList(string spacedListString)
{
var strings = spacedListString.Split();
foreach (var str in strings)
{
yield return str.Trim();
}
}
}