75 lines
2.1 KiB
C#
75 lines
2.1 KiB
C#
using System;
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using System.Collections.Generic;
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using NadekoBot.Common.Collections;
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using NadekoBot.Services.Database.Models;
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namespace NadekoBot.Modules.Permissions.Common
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{
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public class PermissionsCollection<T> : IndexedCollection<T> where T : class, IIndexed
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{
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private readonly object _localLocker = new object();
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public PermissionsCollection(IEnumerable<T> source) : base(source)
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{
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}
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public static implicit operator List<T>(PermissionsCollection<T> x) =>
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x.Source;
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public override void Clear()
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{
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lock (_localLocker)
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{
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var first = Source[0];
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base.Clear();
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Source[0] = first;
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}
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}
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public override bool Remove(T item)
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{
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bool removed;
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lock (_localLocker)
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{
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if(Source.IndexOf(item) == 0)
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throw new ArgumentException("You can't remove first permsission (allow all)");
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removed = base.Remove(item);
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}
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return removed;
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}
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public override void Insert(int index, T item)
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{
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lock (_localLocker)
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{
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if(index == 0) // can't insert on first place. Last item is always allow all.
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throw new IndexOutOfRangeException(nameof(index));
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base.Insert(index, item);
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}
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}
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public override void RemoveAt(int index)
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{
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lock (_localLocker)
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{
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if(index == 0) // you can't remove first permission (allow all)
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throw new IndexOutOfRangeException(nameof(index));
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base.RemoveAt(index);
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}
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}
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public override T this[int index] {
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get => Source[index];
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set {
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lock (_localLocker)
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{
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if(index == 0) // can't set first element. It's always allow all
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throw new IndexOutOfRangeException(nameof(index));
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base[index] = value;
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}
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}
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}
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}
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}
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