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using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Xml;
using Jellyfin.Data.Enums;
using MediaBrowser.Controller.Entities;
using Microsoft.Extensions.Logging;
namespace MediaBrowser.Controller.Extensions;
/// <summary>
/// Provides extension methods for <see cref="XmlReader"/> to parse <see cref="BaseItem"/>'s.
/// </summary>
public static class XmlReaderExtensions
{
/// <summary>
/// Reads a trimmed string from the current node.
/// </summary>
/// <param name="reader">The <see cref="XmlReader"/>.</param>
/// <returns>The trimmed content.</returns>
public static string ReadNormalizedString(this XmlReader reader)
{
ArgumentNullException.ThrowIfNull(reader);
return reader.ReadElementContentAsString().Trim();
}
/// <summary>
/// Reads an int from the current node.
/// </summary>
/// <param name="reader">The <see cref="XmlReader"/>.</param>
/// <param name="value">The parsed <c>int</c>.</param>
/// <returns>A value indicating whether the parsing succeeded.</returns>
public static bool TryReadInt(this XmlReader reader, out int value)
{
ArgumentNullException.ThrowIfNull(reader);
return int.TryParse(reader.ReadElementContentAsString(), CultureInfo.InvariantCulture, out value);
}
/// <summary>
/// Parses a <see cref="DateTime"/> from the current node.
/// </summary>
/// <param name="reader">The <see cref="XmlReader"/>.</param>
/// <param name="logger">The <see cref="ILogger"/> to use on failure.</param>
/// <param name="value">The parsed <see cref="DateTime"/>.</param>
/// <returns>A value indicating whether the parsing succeeded.</returns>
public static bool TryReadDateTime(this XmlReader reader, ILogger logger, out DateTime value)
{
ArgumentNullException.ThrowIfNull(reader);
ArgumentNullException.ThrowIfNull(logger);
var text = reader.ReadElementContentAsString();
if (DateTime.TryParse(
text,
CultureInfo.InvariantCulture,
DateTimeStyles.AssumeUniversal | DateTimeStyles.AdjustToUniversal,
out value))
{
return true;
}
logger.LogWarning("Invalid date: {Date}", text);
return false;
}
/// <summary>
/// Parses a <see cref="DateTime"/> from the current node.
/// </summary>
/// <param name="reader">The <see cref="XmlReader"/>.</param>
/// <param name="formatString">The date format string.</param>
/// <param name="value">The parsed <see cref="DateTime"/>.</param>
/// <returns>A value indicating whether the parsing succeeded.</returns>
public static bool TryReadDateTimeExact(this XmlReader reader, string formatString, out DateTime value)
{
ArgumentNullException.ThrowIfNull(reader);
ArgumentNullException.ThrowIfNull(formatString);
return DateTime.TryParseExact(
reader.ReadElementContentAsString(),
formatString,
CultureInfo.InvariantCulture,
DateTimeStyles.AssumeUniversal | DateTimeStyles.AdjustToUniversal,
out value);
}
/// <summary>
/// Parses a <see cref="PersonInfo"/> from the xml node.
/// </summary>
/// <param name="reader">The <see cref="XmlReader"/>.</param>
/// <returns>A <see cref="PersonInfo"/>, or <c>null</c> if none is found.</returns>
public static PersonInfo? GetPersonFromXmlNode(this XmlReader reader)
{
ArgumentNullException.ThrowIfNull(reader);
if (reader.IsEmptyElement)
{
reader.Read();
return null;
}
var name = string.Empty;
var type = PersonKind.Actor; // If type is not specified assume actor
var role = string.Empty;
int? sortOrder = null;
string? imageUrl = null;
using var subtree = reader.ReadSubtree();
subtree.MoveToContent();
subtree.Read();
while (subtree is { EOF: false, ReadState: ReadState.Interactive })
{
if (subtree.NodeType != XmlNodeType.Element)
{
subtree.Read();
continue;
}
switch (subtree.Name)
{
case "name":
case "Name":
name = subtree.ReadNormalizedString();
break;
case "role":
case "Role":
role = subtree.ReadNormalizedString();
break;
case "type":
case "Type":
Enum.TryParse(subtree.ReadElementContentAsString(), true, out type);
break;
case "order":
case "sortorder":
case "SortOrder":
if (subtree.TryReadInt(out var sortOrderVal))
{
sortOrder = sortOrderVal;
}
break;
case "thumb":
imageUrl = subtree.ReadNormalizedString();
break;
default:
subtree.Skip();
break;
}
}
if (string.IsNullOrWhiteSpace(name))
{
return null;
}
return new PersonInfo
{
Name = name.Trim(),
Role = role,
Type = type,
SortOrder = sortOrder,
ImageUrl = imageUrl
};
}
/// <summary>
/// Used to split names of comma or pipe delimited genres and people.
/// </summary>
/// <param name="reader">The <see cref="XmlReader"/>.</param>
/// <returns>IEnumerable{System.String}.</returns>
public static IEnumerable<string> GetStringArray(this XmlReader reader)
{
ArgumentNullException.ThrowIfNull(reader);
var value = reader.ReadElementContentAsString();
// Only split by comma if there is no pipe in the string
// We have to be careful to not split names like Matthew, Jr.
var separator = !value.Contains('|', StringComparison.Ordinal)
&& !value.Contains(';', StringComparison.Ordinal)
? new[] { ',' }
: new[] { '|', ';' };
foreach (var part in value.Trim().Trim(separator).Split(separator))
{
if (!string.IsNullOrWhiteSpace(part))
{
yield return part.Trim();
}
}
}
/// <summary>
/// Parses a <see cref="PersonInfo"/> array from the xml node.
/// </summary>
/// <param name="reader">The <see cref="XmlReader"/>.</param>
/// <param name="personKind">The <see cref="PersonKind"/>.</param>
/// <returns>The <see cref="IEnumerable{PersonInfo}"/>.</returns>
public static IEnumerable<PersonInfo> GetPersonArray(this XmlReader reader, PersonKind personKind)
=> reader.GetStringArray()
.Select(part => new PersonInfo { Name = part, Type = personKind });
}
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