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Fix line endings in WebhookCacheService

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This commit is contained in:
Ske 2019-10-27 13:09:07 +01:00
parent aed38f37f7
commit 6538c5d054
1 changed files with 91 additions and 91 deletions
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182
PluralKit.Bot/Services/WebhookCacheService.cs
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@ -1,92 +1,92 @@
using System;
using System.Collections.Concurrent;
using System.Linq;
using System.Net.Http;
using System.Threading.Tasks;
using Discord;
using Discord.Webhook;
using Discord.WebSocket;
using Serilog;
namespace PluralKit.Bot
{
public class WebhookCacheService
{
public static readonly string WebhookName = "PluralKit Proxy Webhook";
private DiscordShardedClient _client;
private ConcurrentDictionary<ulong, Lazy<Task<IWebhook>>> _webhooks;
private ILogger _logger;
public WebhookCacheService(IDiscordClient client, ILogger logger)
{
_client = client as DiscordShardedClient;
_logger = logger.ForContext<WebhookCacheService>();
_webhooks = new ConcurrentDictionary<ulong, Lazy<Task<IWebhook>>>();
}
public async Task<IWebhook> GetWebhook(ulong channelId)
{
var channel = _client.GetChannel(channelId) as ITextChannel;
if (channel == null) return null;
return await GetWebhook(channel);
}
public async Task<IWebhook> GetWebhook(ITextChannel channel)
{
// We cache the webhook through a Lazy<Task<T>>, this way we make sure to only create one webhook per channel
// If the webhook is requested twice before it's actually been found, the Lazy<T> wrapper will stop the
// webhook from being created twice.
var lazyWebhookValue =
_webhooks.GetOrAdd(channel.Id, new Lazy<Task<IWebhook>>(() => GetOrCreateWebhook(channel)));
// It's possible to "move" a webhook to a different channel after creation
// Here, we ensure it's actually still pointing towards the proper channel, and if not, wipe and refetch one.
var webhook = await lazyWebhookValue.Value;
if (webhook.ChannelId != channel.Id) return await InvalidateAndRefreshWebhook(webhook);
return webhook;
}
public async Task<IWebhook> InvalidateAndRefreshWebhook(IWebhook webhook)
{
_logger.Information("Refreshing webhook for channel {Channel}", webhook.ChannelId);
_webhooks.TryRemove(webhook.ChannelId, out _);
return await GetWebhook(webhook.Channel);
}
private async Task<IWebhook> GetOrCreateWebhook(ITextChannel channel)
{
_logger.Debug("Webhook for channel {Channel} not found in cache, trying to fetch", channel.Id);
return await FindExistingWebhook(channel) ?? await DoCreateWebhook(channel);
}
private async Task<IWebhook> FindExistingWebhook(ITextChannel channel)
{
_logger.Debug("Finding webhook for channel {Channel}", channel.Id);
try
{
return (await channel.GetWebhooksAsync()).FirstOrDefault(IsWebhookMine);
}
catch (HttpRequestException e)
{
_logger.Warning(e, "Error occurred while fetching webhook list");
// This happens sometimes when Discord returns a malformed request for the webhook list
// Nothing we can do than just assume that none exist and return null.
return null;
}
}
private Task<IWebhook> DoCreateWebhook(ITextChannel channel)
{
_logger.Information("Creating new webhook for channel {Channel}", channel.Id);
return channel.CreateWebhookAsync(WebhookName);
}
private bool IsWebhookMine(IWebhook arg) => arg.Creator.Id == _client.GetShardFor(arg.Guild).CurrentUser.Id && arg.Name == WebhookName;
public int CacheSize => _webhooks.Count;
}
using System;
using System.Collections.Concurrent;
using System.Linq;
using System.Net.Http;
using System.Threading.Tasks;
using Discord;
using Discord.Webhook;
using Discord.WebSocket;
using Serilog;
namespace PluralKit.Bot
{
public class WebhookCacheService
{
public static readonly string WebhookName = "PluralKit Proxy Webhook";
private DiscordShardedClient _client;
private ConcurrentDictionary<ulong, Lazy<Task<IWebhook>>> _webhooks;
private ILogger _logger;
public WebhookCacheService(IDiscordClient client, ILogger logger)
{
_client = client as DiscordShardedClient;
_logger = logger.ForContext<WebhookCacheService>();
_webhooks = new ConcurrentDictionary<ulong, Lazy<Task<IWebhook>>>();
}
public async Task<IWebhook> GetWebhook(ulong channelId)
{
var channel = _client.GetChannel(channelId) as ITextChannel;
if (channel == null) return null;
return await GetWebhook(channel);
}
public async Task<IWebhook> GetWebhook(ITextChannel channel)
{
// We cache the webhook through a Lazy<Task<T>>, this way we make sure to only create one webhook per channel
// If the webhook is requested twice before it's actually been found, the Lazy<T> wrapper will stop the
// webhook from being created twice.
var lazyWebhookValue =
_webhooks.GetOrAdd(channel.Id, new Lazy<Task<IWebhook>>(() => GetOrCreateWebhook(channel)));
// It's possible to "move" a webhook to a different channel after creation
// Here, we ensure it's actually still pointing towards the proper channel, and if not, wipe and refetch one.
var webhook = await lazyWebhookValue.Value;
if (webhook.ChannelId != channel.Id) return await InvalidateAndRefreshWebhook(webhook);
return webhook;
}
public async Task<IWebhook> InvalidateAndRefreshWebhook(IWebhook webhook)
{
_logger.Information("Refreshing webhook for channel {Channel}", webhook.ChannelId);
_webhooks.TryRemove(webhook.ChannelId, out _);
return await GetWebhook(webhook.Channel);
}
private async Task<IWebhook> GetOrCreateWebhook(ITextChannel channel)
{
_logger.Debug("Webhook for channel {Channel} not found in cache, trying to fetch", channel.Id);
return await FindExistingWebhook(channel) ?? await DoCreateWebhook(channel);
}
private async Task<IWebhook> FindExistingWebhook(ITextChannel channel)
{
_logger.Debug("Finding webhook for channel {Channel}", channel.Id);
try
{
return (await channel.GetWebhooksAsync()).FirstOrDefault(IsWebhookMine);
}
catch (HttpRequestException e)
{
_logger.Warning(e, "Error occurred while fetching webhook list");
// This happens sometimes when Discord returns a malformed request for the webhook list
// Nothing we can do than just assume that none exist and return null.
return null;
}
}
private Task<IWebhook> DoCreateWebhook(ITextChannel channel)
{
_logger.Information("Creating new webhook for channel {Channel}", channel.Id);
return channel.CreateWebhookAsync(WebhookName);
}
private bool IsWebhookMine(IWebhook arg) => arg.Creator.Id == _client.GetShardFor(arg.Guild).CurrentUser.Id && arg.Name == WebhookName;
public int CacheSize => _webhooks.Count;
}
}