124 lines
3.6 KiB
C#
124 lines
3.6 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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namespace SharpChat {
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public class ChannelsContext {
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private readonly List<ChannelInfo> Channels = new();
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public ChannelInfo? MainChannel { get; private set; }
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public int TotalCount { get; private set; }
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public int PublicCount { get; private set; }
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public ChannelInfo[] All => Channels.ToArray();
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public ChannelInfo? Get(
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string? name,
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Func<string, string>? sanitise = null
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) {
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if(string.IsNullOrWhiteSpace(name))
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return null;
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foreach(ChannelInfo info in Channels) {
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string chanName = info.Name;
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if(sanitise != null)
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chanName = sanitise(chanName);
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if(!chanName.Equals(name, StringComparison.InvariantCultureIgnoreCase))
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continue;
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return info;
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}
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return null;
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}
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public ChannelInfo[] GetMany(
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string[]? names = null,
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Func<string, string>? sanitiseName = null,
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int minRank = 0,
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bool? isPublic = null
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) {
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List<ChannelInfo> chans = new();
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names ??= Array.Empty<string>();
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for(int i = 0; i < names.Length; ++i)
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names[i] = names[i].ToLowerInvariant();
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foreach(ChannelInfo info in Channels) {
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if(info.Rank > minRank)
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continue;
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if(isPublic != null && info.IsPublic != isPublic)
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continue;
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if(names?.Length > 0) {
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string chanName = info.Name;
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if(sanitiseName != null)
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chanName = sanitiseName(chanName);
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bool match = false;
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foreach(string name in names)
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if(match = chanName.Equals(name, StringComparison.InvariantCultureIgnoreCase))
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break;
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if(!match)
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continue;
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}
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chans.Add(info);
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}
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return chans.ToArray();
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}
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public void Add(
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ChannelInfo info,
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bool forceMain = false,
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Func<string, string>? sanitiseName = null
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) {
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if(Get(info.Name, sanitiseName) != null)
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throw new ArgumentException("A channel with this name has already been registered.", nameof(info));
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if(string.IsNullOrWhiteSpace(info.Name))
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throw new ArgumentException("Channel names may not be blank.", nameof(info));
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// todo: there should be more restrictions on channel names
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Channels.Add(info);
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++TotalCount;
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if(info.IsPublic)
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++PublicCount;
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if(forceMain || MainChannel == null)
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MainChannel = info;
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}
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public void Remove(
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ChannelInfo info,
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Func<string, string>? sanitiseName = null
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) {
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Remove(info.Name, sanitiseName);
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}
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public void Remove(
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string? name,
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Func<string, string>? sanitise = null
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) {
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if(string.IsNullOrWhiteSpace(name))
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return;
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ChannelInfo? info = Get(name, sanitise);
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if(info == null)
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return;
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Channels.Remove(info);
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--TotalCount;
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if(info.IsPublic)
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--PublicCount;
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if(MainChannel == info)
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MainChannel = Channels.FirstOrDefault(c => !c.IsPublic);
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}
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}
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}
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