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using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using Jellyfin.Data.Enums;
using MediaBrowser.Common.Extensions;
using MediaBrowser.Controller.Net;
using MediaBrowser.Controller.Session;
using MediaBrowser.Model.Querying;
using Microsoft.AspNetCore.Http;
namespace Jellyfin.Api.Helpers
{
/// <summary>
/// Request Extensions.
/// </summary>
public static class RequestHelpers
{
/// <summary>
/// Get Order By.
/// </summary>
/// <param name="sortBy">Sort By. Comma delimited string.</param>
/// <param name="requestedSortOrder">Sort Order. Comma delimited string.</param>
/// <returns>Order By.</returns>
public static ValueTuple<string, SortOrder>[] GetOrderBy(string? sortBy, string? requestedSortOrder)
{
var val = sortBy;
if (string.IsNullOrEmpty(val))
{
return Array.Empty<ValueTuple<string, SortOrder>>();
}
var vals = val.Split(',');
if (string.IsNullOrWhiteSpace(requestedSortOrder))
{
requestedSortOrder = "Ascending";
}
var sortOrders = requestedSortOrder.Split(',');
var result = new ValueTuple<string, SortOrder>[vals.Length];
for (var i = 0; i < vals.Length; i++)
{
var sortOrderIndex = sortOrders.Length > i ? i : 0;
var sortOrderValue = sortOrders.Length > sortOrderIndex ? sortOrders[sortOrderIndex] : null;
var sortOrder = string.Equals(sortOrderValue, "Descending", StringComparison.OrdinalIgnoreCase)
? SortOrder.Descending
: SortOrder.Ascending;
result[i] = new ValueTuple<string, SortOrder>(vals[i], sortOrder);
}
return result;
}
/// <summary>
/// Get parsed filters.
/// </summary>
/// <param name="filters">The filters.</param>
/// <returns>Item filters.</returns>
public static IEnumerable<ItemFilter> GetFilters(string? filters)
{
return string.IsNullOrEmpty(filters)
? Array.Empty<ItemFilter>()
: filters.Split(',').Select(v => Enum.Parse<ItemFilter>(v, true));
}
/// <summary>
/// Splits a string at a separating character into an array of substrings.
/// </summary>
/// <param name="value">The string to split.</param>
/// <param name="separator">The char that separates the substrings.</param>
/// <param name="removeEmpty">Option to remove empty substrings from the array.</param>
/// <returns>An array of the substrings.</returns>
internal static string[] Split(string? value, char separator, bool removeEmpty)
{
if (string.IsNullOrWhiteSpace(value))
{
return Array.Empty<string>();
}
return removeEmpty
? value.Split(new[] { separator }, StringSplitOptions.RemoveEmptyEntries)
: value.Split(separator);
}
/// <summary>
/// Checks if the user can update an entry.
/// </summary>
/// <param name="authContext">Instance of the <see cref="IAuthorizationContext"/> interface.</param>
/// <param name="requestContext">The <see cref="HttpRequest"/>.</param>
/// <param name="userId">The user id.</param>
/// <param name="restrictUserPreferences">Whether to restrict the user preferences.</param>
/// <returns>A <see cref="bool"/> whether the user can update the entry.</returns>
internal static bool AssertCanUpdateUser(IAuthorizationContext authContext, HttpRequest requestContext, Guid userId, bool restrictUserPreferences)
{
var auth = authContext.GetAuthorizationInfo(requestContext);
var authenticatedUser = auth.User;
// If they're going to update the record of another user, they must be an administrator
if ((!userId.Equals(auth.UserId) && !authenticatedUser.HasPermission(PermissionKind.IsAdministrator))
|| (restrictUserPreferences && !authenticatedUser.EnableUserPreferenceAccess))
{
return false;
}
return true;
}
internal static SessionInfo GetSession(ISessionManager sessionManager, IAuthorizationContext authContext, HttpRequest request)
{
var authorization = authContext.GetAuthorizationInfo(request);
var user = authorization.User;
var session = sessionManager.LogSessionActivity(
authorization.Client,
authorization.Version,
authorization.DeviceId,
authorization.Device,
request.HttpContext.GetNormalizedRemoteIp(),
user);
if (session == null)
{
throw new ArgumentException("Session not found.");
}
return session;
}
/// <summary>
/// Get Guid array from string.
/// </summary>
/// <param name="value">String value.</param>
/// <returns>Guid array.</returns>
internal static Guid[] GetGuids(string? value)
{
if (value == null)
{
return Array.Empty<Guid>();
}
return Split(value, ',', true)
.Select(i => new Guid(i))
.ToArray();
}
/// <summary>
/// Gets the item fields.
/// </summary>
/// <param name="fields">The fields string.</param>
/// <returns>IEnumerable{ItemFields}.</returns>
internal static ItemFields[] GetItemFields(string? fields)
{
if (string.IsNullOrEmpty(fields))
{
return Array.Empty<ItemFields>();
}
return Split(fields, ',', true)
.Select(v =>
{
if (Enum.TryParse(v, true, out ItemFields value))
{
return (ItemFields?)value;
}
return null;
}).Where(i => i.HasValue)
.Select(i => i!.Value)
.ToArray();
}
}
}
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