Merge pull request #10352 from barronpm/xml-parsing-cleanup
Bond-009
1 year ago
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c45157158e
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using System;
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using System.Collections.Generic;
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using System.Globalization;
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using System.Linq;
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using System.Xml;
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using Jellyfin.Data.Enums;
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using MediaBrowser.Controller.Entities;
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namespace MediaBrowser.Controller.Extensions;
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/// <summary>
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/// Provides extension methods for <see cref="XmlReader"/> to parse <see cref="BaseItem"/>'s.
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/// </summary>
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public static class XmlReaderExtensions
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{
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/// <summary>
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/// Reads a trimmed string from the current node.
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/// </summary>
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/// <param name="reader">The <see cref="XmlReader"/>.</param>
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/// <returns>The trimmed content.</returns>
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public static string ReadNormalizedString(this XmlReader reader)
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{
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ArgumentNullException.ThrowIfNull(reader);
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return reader.ReadElementContentAsString().Trim();
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}
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/// <summary>
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/// Reads an int from the current node.
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/// </summary>
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/// <param name="reader">The <see cref="XmlReader"/>.</param>
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/// <param name="value">The parsed <c>int</c>.</param>
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/// <returns>A value indicating whether the parsing succeeded.</returns>
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public static bool TryReadInt(this XmlReader reader, out int value)
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{
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ArgumentNullException.ThrowIfNull(reader);
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return int.TryParse(reader.ReadElementContentAsString(), CultureInfo.InvariantCulture, out value);
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}
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/// <summary>
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/// Parses a <see cref="DateTime"/> from the current node.
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/// </summary>
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/// <param name="reader">The <see cref="XmlReader"/>.</param>
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/// <param name="value">The parsed <see cref="DateTime"/>.</param>
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/// <returns>A value indicating whether the parsing succeeded.</returns>
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public static bool TryReadDateTime(this XmlReader reader, out DateTime value)
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{
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ArgumentNullException.ThrowIfNull(reader);
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return DateTime.TryParse(
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reader.ReadElementContentAsString(),
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CultureInfo.InvariantCulture,
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DateTimeStyles.AssumeUniversal | DateTimeStyles.AdjustToUniversal,
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out value);
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}
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/// <summary>
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/// Parses a <see cref="DateTime"/> from the current node.
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/// </summary>
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/// <param name="reader">The <see cref="XmlReader"/>.</param>
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/// <param name="formatString">The date format string.</param>
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/// <param name="value">The parsed <see cref="DateTime"/>.</param>
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/// <returns>A value indicating whether the parsing succeeded.</returns>
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public static bool TryReadDateTimeExact(this XmlReader reader, string formatString, out DateTime value)
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{
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ArgumentNullException.ThrowIfNull(reader);
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ArgumentNullException.ThrowIfNull(formatString);
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return DateTime.TryParseExact(
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reader.ReadElementContentAsString(),
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formatString,
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CultureInfo.InvariantCulture,
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DateTimeStyles.AssumeUniversal | DateTimeStyles.AdjustToUniversal,
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out value);
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}
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/// <summary>
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/// Parses a <see cref="PersonInfo"/> from the xml node.
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/// </summary>
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/// <param name="reader">The <see cref="XmlReader"/>.</param>
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/// <returns>A <see cref="PersonInfo"/>, or <c>null</c> if none is found.</returns>
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public static PersonInfo? GetPersonFromXmlNode(this XmlReader reader)
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{
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ArgumentNullException.ThrowIfNull(reader);
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if (reader.IsEmptyElement)
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{
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reader.Read();
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return null;
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}
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var name = string.Empty;
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var type = PersonKind.Actor; // If type is not specified assume actor
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var role = string.Empty;
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int? sortOrder = null;
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string? imageUrl = null;
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using var subtree = reader.ReadSubtree();
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subtree.MoveToContent();
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subtree.Read();
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while (subtree is { EOF: false, ReadState: ReadState.Interactive })
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{
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if (subtree.NodeType != XmlNodeType.Element)
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{
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subtree.Read();
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continue;
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}
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switch (subtree.Name)
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{
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case "name":
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case "Name":
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name = subtree.ReadNormalizedString();
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break;
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case "role":
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case "Role":
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role = subtree.ReadNormalizedString();
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break;
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case "type":
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case "Type":
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Enum.TryParse(subtree.ReadElementContentAsString(), true, out type);
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break;
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case "order":
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case "sortorder":
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case "SortOrder":
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if (subtree.TryReadInt(out var sortOrderVal))
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{
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sortOrder = sortOrderVal;
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}
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break;
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case "thumb":
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imageUrl = subtree.ReadNormalizedString();
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break;
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default:
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subtree.Skip();
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break;
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}
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}
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if (string.IsNullOrWhiteSpace(name))
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{
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return null;
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}
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return new PersonInfo
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{
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Name = name,
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Role = role,
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Type = type,
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SortOrder = sortOrder,
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ImageUrl = imageUrl
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};
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}
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/// <summary>
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/// Used to split names of comma or pipe delimited genres and people.
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/// </summary>
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/// <param name="reader">The <see cref="XmlReader"/>.</param>
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/// <returns>IEnumerable{System.String}.</returns>
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public static IEnumerable<string> GetStringArray(this XmlReader reader)
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{
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ArgumentNullException.ThrowIfNull(reader);
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var value = reader.ReadElementContentAsString();
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// Only split by comma if there is no pipe in the string
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// We have to be careful to not split names like Matthew, Jr.
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var separator = !value.Contains('|', StringComparison.Ordinal)
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&& !value.Contains(';', StringComparison.Ordinal)
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? new[] { ',' }
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: new[] { '|', ';' };
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foreach (var part in value.Trim().Trim(separator).Split(separator))
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{
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if (!string.IsNullOrWhiteSpace(part))
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{
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yield return part.Trim();
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}
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}
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}
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/// <summary>
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/// Parses a <see cref="PersonInfo"/> array from the xml node.
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/// </summary>
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/// <param name="reader">The <see cref="XmlReader"/>.</param>
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/// <param name="personKind">The <see cref="PersonKind"/>.</param>
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/// <returns>The <see cref="IEnumerable{PersonInfo}"/>.</returns>
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public static IEnumerable<PersonInfo> GetPersonArray(this XmlReader reader, PersonKind personKind)
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=> reader.GetStringArray()
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.Select(part => new PersonInfo { Name = part, Type = personKind });
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}
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