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Begin module rewrites and ports

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This commit is contained in:
Noi 2022-04-23 13:01:27 -07:00
parent 02f91947f3
commit 4f773e2573
14 changed files with 514 additions and 812 deletions
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114
RegexBot-Modules/AutoResponder/AutoResponder.cs
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@ -1,61 +1,77 @@
using Discord.WebSocket;
using Newtonsoft.Json.Linq;
using System.Collections.Generic;
using System.Threading.Tasks;
using System.Diagnostics;
namespace RegexBot.Modules.AutoResponder
{
/// <summary>
/// Provides the capability to define text responses to pattern-based triggers for fun or informational
/// purposes. Although in essence similar to <see cref="RegexModerator.RegexModerator"/>, it is a better
/// fit for non-moderation use cases and has specific features suitable to that end.
/// </summary>
[RegexbotModule]
class AutoResponder : ModuleBase
{
public AutoResponder(RegexbotClient bot) : base(bot)
{
DiscordClient.MessageReceived += DiscordClient_MessageReceived;
namespace RegexBot.Modules.AutoResponder;
/// <summary>
/// Provides the capability to define text responses to pattern-based triggers for fun or informational
/// purposes. Although in essence similar to <see cref="RegexModerator.RegexModerator"/>, it is a better
/// fit for non-moderation use cases and has specific features suitable to that end.
/// </summary>
[RegexbotModule]
public class AutoResponder : RegexbotModule {
public AutoResponder(RegexbotClient bot) : base(bot) {
DiscordClient.MessageReceived += DiscordClient_MessageReceived;
}
private async Task DiscordClient_MessageReceived(SocketMessage arg) {
if (arg.Channel is not SocketGuildChannel ch) return;
if (arg.Author.IsBot || arg.Author.IsWebhook) return;
var definitions = GetGuildState<IEnumerable<Definition>>(ch.Guild.Id);
if (definitions == null) return; // No configuration in this guild; do no further processing
var tasks = new List<Task>();
foreach (var def in definitions) {
tasks.Add(Task.Run(async () => await ProcessMessageAsync(arg, def)));
}
private async Task DiscordClient_MessageReceived(SocketMessage arg)
{
if (!(arg.Channel is SocketGuildChannel ch)) return;
if (arg.Author.IsBot || arg.Author.IsWebhook) return;
await Task.WhenAll(tasks);
}
var definitions = GetGuildState<IEnumerable<Definition>>(ch.Guild.Id);
if (definitions == null) return; // No configuration in this guild; do no further processing
var tasks = new List<Task>();
foreach (var def in definitions)
{
tasks.Add(Task.Run(async () => await ProcessMessageAsync(arg, def)));
}
await Task.WhenAll(tasks);
public override Task<object?> CreateGuildStateAsync(ulong guild, JToken config) {
// Guild state is a read-only IEnumerable<Definition>
if (config == null) return Task.FromResult<object?>(null);
var guildDefs = new List<Definition>();
foreach (var defconf in config.Children<JProperty>()) {
// Validation of data is left to the Definition constructor
var def = new Definition(defconf); // ModuleLoadException may be thrown here
guildDefs.Add(def);
// TODO global options
}
public override Task<object> CreateGuildStateAsync(ulong guild, JToken config)
{
// Guild state is a read-only IEnumerable<Definition>
if (config == null) return Task.FromResult<object>(null);
var guildDefs = new List<Definition>();
foreach (var defconf in config.Children<JProperty>())
{
// Getting all JProperties in the section.
// Validation of data is left to the Definition constructor. ModuleLoadException thrown here:
var def = new Definition(defconf);
guildDefs.Add(def);
// TODO global options
}
return Task.FromResult<object?>(guildDefs.AsReadOnly());
}
return Task.FromResult<object>(guildDefs.AsReadOnly());
}
private async Task ProcessMessageAsync(SocketMessage msg, Definition def) {
if (!def.Match(msg)) return;
private async Task ProcessMessageAsync(SocketMessage msg, Definition def)
{
if (!def.Match(msg)) return;
if (def.Command == null) {
await msg.Channel.SendMessageAsync(def.GetResponse());
} else {
var ch = (SocketGuildChannel)msg.Channel;
string[] cmdline = def.Command.Split(new char[] { ' ' }, 2);
var ps = new ProcessStartInfo() {
FileName = cmdline[0],
Arguments = (cmdline.Length == 2 ? cmdline[1] : ""),
UseShellExecute = false, // ???
CreateNoWindow = true,
RedirectStandardOutput = true
};
using var p = Process.Start(ps)!;
p.WaitForExit(5000); // waiting 5 seconds at most
if (p.HasExited) {
if (p.ExitCode != 0) {
PLog($"Command execution in {ch.Guild.Id}: Process exited abnormally (with code {p.ExitCode}).");
}
using var stdout = p.StandardOutput;
var result = await stdout.ReadToEndAsync();
if (!string.IsNullOrWhiteSpace(result)) await msg.Channel.SendMessageAsync(result);
} else {
PLog($"Command execution in {ch.Guild.Id}: Process has not exited in 5 seconds. Killing process.");
p.Kill();
}
}
}
}

306
RegexBot-Modules/AutoResponder/Definition.cs
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@ -1,183 +1,165 @@
using Discord.WebSocket;
using RegexBot.Common;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using RegexBot.Common;
using System.Text.RegularExpressions;
namespace RegexBot.Modules.AutoResponder
{
namespace RegexBot.Modules.AutoResponder;
/// <summary>
/// Representation of a single <see cref="AutoResponder"/> configuration definition.
/// </summary>
class Definition {
private static readonly Random Chance = new();
public string Label { get; }
public IEnumerable<Regex> Regex { get; }
public IReadOnlyList<string> Response { get; }
public string? Command { get; }
public FilterList Filter { get; }
public RateLimit<ulong> RateLimit { get; }
public double RandomChance { get; }
/// <summary>
/// Representation of a single <see cref="AutoResponder"/> configuration definition.
/// Creates an instance based on JSON configuration.
/// </summary>
class Definition
{
private static readonly Random Chance = new Random();
public Definition(JProperty incoming) {
Label = incoming.Name;
if (incoming.Value.Type != JTokenType.Object)
throw new ModuleLoadException($"Value of {nameof(AutoResponder)} definition must be a JSON object.");
var data = (JObject)incoming.Value;
public string Label { get; }
public IEnumerable<Regex> Regex { get; }
public IReadOnlyList<string> Response { get; }
public FilterList Filter { get; }
public RateLimit<ulong> RateLimit { get; }
public double RandomChance { get; }
// error message postfix
var errpofx = $" in AutoRespond definition '{Label}'.";
/// <summary>
/// Creates an instance based on JSON configuration.
/// </summary>
/// <param name="config"></param>
public Definition(JProperty incoming)
{
Label = incoming.Name;
if (incoming.Value.Type != JTokenType.Object)
throw new ModuleLoadException($"Value of {nameof(AutoResponder)} definition must be a JSON object.");
var data = (JObject)incoming.Value;
// error message postfix
var errorpfx = $" in AutoRespond definition '{Label}'.";
// Parse regex
const RegexOptions rxopts = RegexOptions.Compiled | RegexOptions.IgnoreCase | RegexOptions.Multiline;
var regexes = new List<Regex>();
var rxconf = data["regex"];
if (rxconf == null) throw new ModuleLoadException("No regular expression patterns defined" + errorpfx);
// Accepting either array or single string
// TODO detection of regex values that go around these options or attempt advanced functionality
// TODO repeated code! simplify this a little.
if (rxconf.Type == JTokenType.Array)
{
foreach (var input in rxconf.Values<string>())
{
try
{
var r = new Regex(input, rxopts);
regexes.Add(r);
}
catch (ArgumentException)
{
throw new ModuleLoadException($"Failed to parse regular expression pattern '{input}'{errorpfx}");
}
}
}
else if (rxconf.Type == JTokenType.String)
{
var rxstr = rxconf.Value<string>();
try
{
var r = new Regex(rxstr, rxopts);
// Parse regex
const RegexOptions rxopts = RegexOptions.Compiled | RegexOptions.IgnoreCase | RegexOptions.Multiline;
var regexes = new List<Regex>();
var rxconf = data[nameof(Regex)];
// Accepting either array or single string
// TODO this code could be moved into a helper method somehow
if (rxconf?.Type == JTokenType.Array) {
foreach (var input in rxconf.Values<string>()) {
try {
var r = new Regex(input!, rxopts);
regexes.Add(r);
}
catch (ArgumentException)
{
throw new ModuleLoadException($"Failed to parse regular expression pattern '{rxstr}'{errorpfx}");
} catch (ArgumentException) {
throw new ModuleLoadException($"Failed to parse regular expression pattern '{input}'{errpofx}");
}
}
else
{
// TODO fix up wording of error message here
throw new ModuleLoadException("Unacceptable value given as a regular expession" + errorpfx);
} else if (rxconf?.Type == JTokenType.String) {
var rxstr = rxconf.Value<string>()!;
try {
var r = new Regex(rxstr, rxopts);
regexes.Add(r);
} catch (ArgumentException) {
throw new ModuleLoadException($"Failed to parse regular expression pattern '{rxstr}'{errpofx}");
}
Regex = regexes.AsReadOnly();
} else {
throw new ModuleLoadException("'Regex' not defined" + errpofx);
}
Regex = regexes.AsReadOnly();
// Get response
// TODO repeated code here also! maybe create a helper method for reading either a single string or string array.
var replyconf = data["reply"];
if (replyconf.Type == JTokenType.String)
{
var str = replyconf.Value<string>();
Response = new List<string>() { str }.AsReadOnly();
}
else if (replyconf.Type == JTokenType.Array)
{
Response = new List<string>(replyconf.Values<string>()).AsReadOnly();
}
bool responseDefined;
// Filtering
Filter = new FilterList(data);
// Get response
// TODO this bit could also go into the same aforementioned helper method
var replyconf = data["reply"];
if (replyconf?.Type == JTokenType.String) {
var str = replyconf.Value<string>()!;
Response = new List<string>() { str }.AsReadOnly();
responseDefined = true;
} else if (replyconf?.Type == JTokenType.Array) {
Response = new List<string>(replyconf.Values<string>()!).AsReadOnly();
responseDefined = true;
} else {
Response = Array.Empty<string>();
responseDefined = false;
}
// Get command
var commconf = data[nameof(Command)];
if (commconf != null && responseDefined) {
throw new ModuleLoadException("Cannot have 'Response' and 'Command' defined at the same time" + errpofx);
}
if (!responseDefined) {
if (commconf != null) {
var commstr = commconf.Value<string>();
if (string.IsNullOrWhiteSpace(commstr))
throw new ModuleLoadException("'Command' is defined, but value is blank" + errpofx);
Command = commstr;
responseDefined = true;
}
}
// Got neither...
if (!responseDefined) throw new ModuleLoadException("Neither 'Response' nor 'Command' were defined" + errpofx);
// Rate limiting
string rlstr = data["ratelimit"]?.Value<string>();
if (string.IsNullOrWhiteSpace(rlstr))
{
RateLimit = new RateLimit<ulong>();
}
else
{
if (ushort.TryParse(rlstr, out var rlval))
{
RateLimit = new RateLimit<ulong>(rlval);
}
else
{
throw new ModuleLoadException("Invalid rate limit value" + errorpfx);
}
}
// Filtering
Filter = new FilterList(data);
// Random chance parameter
string randstr = data["RandomChance"]?.Value<string>();
double randval;
if (string.IsNullOrWhiteSpace(randstr))
{
randval = double.NaN;
// Rate limiting
var rlconf = data[nameof(RateLimit)];
if (rlconf?.Type == JTokenType.Integer) {
var rlval = rlconf.Value<uint>();
RateLimit = new RateLimit<ulong>(rlval);
} else if (rlconf != null) {
throw new ModuleLoadException("'RateLimit' must be a non-negative integer" + errpofx);
} else {
RateLimit = new(0);
}
var rlstr = data[nameof(RateLimit)]?.Value<ushort>();
// Random chance parameter
var randstr = data[nameof(RandomChance)]?.Value<string>();
double randval;
if (string.IsNullOrWhiteSpace(randstr)) {
randval = double.NaN;
} else {
if (!double.TryParse(randstr, out randval)) {
throw new ModuleLoadException("Random value is invalid (unable to parse)" + errpofx);
}
else
{
if (!double.TryParse(randstr, out randval))
{
throw new ModuleLoadException("Random value is invalid (unable to parse)" + errorpfx);
}
if (randval > 1 || randval < 0)
{
throw new ModuleLoadException("Random value is invalid (not between 0 and 1)" + errorpfx);
}
if (randval is > 1 or < 0) {
throw new ModuleLoadException("Random value is invalid (not between 0 and 1)" + errpofx);
}
RandomChance = randval;
}
RandomChance = randval;
}
/// <summary>
/// Checks the given message to determine if it matches this rule's constraints.
/// This method also maintains rate limiting and performs random number generation.
/// </summary>
/// <returns>True if the rule's response(s) should be executed.</returns>
public bool Match(SocketMessage m) {
// Filter check
if (Filter.IsFiltered(m, true)) return false;
// Match check
bool matchFound = false;
foreach (var item in Regex) {
if (item.IsMatch(m.Content)) {
matchFound = true;
break;
}
}
if (!matchFound) return false;
// Rate limit check - currently per channel
if (!RateLimit.IsPermitted(m.Channel.Id)) return false;
// Random chance check
if (!double.IsNaN(RandomChance)) {
// Fail if randomly generated value is higher than the parameter
// Example: To fail a 75% chance, the check value must be between 0.75000...001 and 1.0.
var chk = Chance.NextDouble();
if (chk > RandomChance) return false;
}
/// <summary>
/// Checks the given message to determine if it matches this rule's constraints.
/// </summary>
/// <returns>True if the rule's response(s) should be executed.</returns>
public bool Match(SocketMessage m)
{
// Filter check
if (Filter.IsFiltered(m, true)) return false;
return true;
}
// Match check
bool matchFound = false;
foreach (var item in Regex)
{
// TODO determine maximum execution time for a regular expression match
if (item.IsMatch(m.Content))
{
matchFound = true;
break;
}
}
if (!matchFound) return false;
// Rate limit check - currently per channel
if (!RateLimit.Permit(m.Channel.Id)) return false;
// Random chance check
if (!double.IsNaN(RandomChance))
{
// Fail if randomly generated value is higher than the parameter
// Example: To fail a 75% chance, the check value must be between 0.75000...001 and 1.0.
var chk = Chance.NextDouble();
if (chk > RandomChance) return false;
}
return true;
}
/// <summary>
/// Gets a response string to display in the channel.
/// </summary>
public string GetResponse()
{
// TODO feature request: option to show responses in order instead of random
if (Response.Count == 1) return Response[0];
return Response[Chance.Next(0, Response.Count - 1)];
}
/// <summary>
/// Gets a response string to display in the channel.
/// </summary>
public string GetResponse() {
// TODO feature request: option to show responses in order instead of random
if (Response.Count == 1) return Response[0];
return Response[Chance.Next(0, Response.Count - 1)];
}
}

54
RegexBot-Modules/AutoResponder/RateLimit.cs
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@ -1,54 +0,0 @@
using System;
using System.Collections.Generic;
namespace RegexBot.Modules.AutoResponder
{
/// <summary>
/// Helper class for managing rate limit data.
/// </summary>
class RateLimit<T>
{
public const ushort DefaultTimeout = 20; // Skeeter's a cool guy and you can't convince me otherwise.
public ushort Timeout { get; }
private readonly object _lock = new object();
private Dictionary<T, DateTime> _table = new Dictionary<T, DateTime>();
public RateLimit() : this(DefaultTimeout) { }
public RateLimit(ushort timeout) => Timeout = timeout;
/// <summary>
/// 'Permit?' - Checks if the given value is permitted through the rate limit.
/// Executing this method may create a rate limit entry for the given value.
/// </summary>
/// <param name="id"></param>
/// <returns>True if the given value is permitted by the rate limiter.</returns>
public bool Permit(T value)
{
if (Timeout == 0) return true;
lock (_lock)
{
Clean();
if (_table.ContainsKey(value)) return false;
_table.Add(value, DateTime.Now);
}
return true;
}
/// <summary>
/// Clean up expired entries.
/// </summary>
private void Clean()
{
var now = DateTime.Now;
var newTable = new Dictionary<T, DateTime>();
foreach (var item in _table)
{
// Copy items that have not yet timed out to the new dictionary. Discard the rest.
if (item.Value.AddSeconds(Timeout) > now) newTable.Add(item.Key, item.Value);
}
lock (_lock) _table = newTable;
}
}
}

96
RegexBot-Modules/AutoScriptResponder/AutoScriptResponder.cs
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@ -1,96 +0,0 @@
using Discord.WebSocket;
using Newtonsoft.Json.Linq;
using System.Collections.Generic;
using System.Diagnostics;
using System.Threading.Tasks;
namespace RegexBot.Modules.AutoScriptResponder
{
/// <summary>
/// Meant to be highly identical to AutoResponder, save for its differentiating feature.
/// This may not be the best approach to it, but do try and copy any relevant changes from one into
/// the other whenever they occur.
/// The feature in question: It executes external scripts and replies with their output.
/// </summary>
[RegexbotModule]
class AutoScriptResponder : ModuleBase
{
public AutoScriptResponder(RegexbotClient bot) : base(bot)
{
DiscordClient.MessageReceived += DiscordClient_MessageReceived;
}
private async Task DiscordClient_MessageReceived(SocketMessage arg)
{
if (!(arg.Channel is SocketGuildChannel ch)) return;
if (arg.Author.IsBot || arg.Author.IsWebhook) return;
var definitions = GetGuildState<IEnumerable<Definition>>(ch.Guild.Id);
if (definitions == null) return; // No configuration in this guild; do no further processing
var tasks = new List<Task>();
foreach (var def in definitions)
{
tasks.Add(Task.Run(async () => await ProcessMessageAsync(arg, def)));
}
await Task.WhenAll(tasks);
}
public override Task<object> CreateGuildStateAsync(ulong guild, JToken config)
{
// Guild state is a read-only IEnumerable<Definition>
if (config == null) return Task.FromResult<object>(null);
var guildDefs = new List<Definition>();
foreach (var defconf in config.Children<JProperty>())
{
// Getting all JProperties in the section.
// Validation of data is left to the Definition constructor. ModuleLoadException thrown here:
var def = new Definition(defconf);
guildDefs.Add(def);
// TODO global options
}
return Task.FromResult<object>(guildDefs.AsReadOnly());
}
// ASR edit: this whole thing.
private async Task ProcessMessageAsync(SocketMessage msg, Definition def)
{
if (!def.Match(msg)) return;
var ch = (SocketGuildChannel)msg.Channel;
string[] cmdline = def.Command.Split(new char[] { ' ' }, 2);
var ps = new ProcessStartInfo()
{
FileName = cmdline[0],
Arguments = (cmdline.Length == 2 ? cmdline[1] : ""),
UseShellExecute = false, // ???
CreateNoWindow = true,
RedirectStandardOutput = true
};
using (Process p = Process.Start(ps))
{
p.WaitForExit(5000); // waiting 5 seconds at most
if (p.HasExited)
{
if (p.ExitCode != 0)
{
await LogAsync(ch.Guild.Id, $"'{def.Label}': Process exited abnormally (with code {p.ExitCode}).");
}
using (var stdout = p.StandardOutput)
{
var result = await stdout.ReadToEndAsync();
if (!string.IsNullOrWhiteSpace(result)) await msg.Channel.SendMessageAsync(result);
}
}
else
{
await LogAsync(ch.Guild.Id, $"'{def.Label}': Process has not exited in 5 seconds. Killing process.");
p.Kill();
}
}
}
}
}

169
RegexBot-Modules/AutoScriptResponder/Definition.cs
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@ -1,169 +0,0 @@
using Discord.WebSocket;
using RegexBot.Common;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.Text.RegularExpressions;
namespace RegexBot.Modules.AutoScriptResponder
{
/// <summary>
/// Representation of a single <see cref="AutoResponder"/> configuration definition.
/// </summary>
class Definition
{
private static readonly Random Chance = new Random();
public string Label { get; }
public IEnumerable<Regex> Regex { get; }
// ASR edit:
public string Command { get; }
public FilterList Filter { get; }
public RateLimit<ulong> RateLimit { get; }
public double RandomChance { get; }
/// <summary>
/// Creates an instance based on JSON configuration.
/// </summary>
/// <param name="config"></param>
public Definition(JProperty incoming)
{
Label = incoming.Name;
if (incoming.Value.Type != JTokenType.Object)
throw new ModuleLoadException($"Value of {nameof(AutoScriptResponder)} definition must be a JSON object.");
var data = (JObject)incoming.Value;
// error message postfix
var errorpfx = $" in AutoRespond definition '{Label}'.";
// Parse regex
const RegexOptions rxopts = RegexOptions.Compiled | RegexOptions.IgnoreCase | RegexOptions.Multiline;
var regexes = new List<Regex>();
var rxconf = data["regex"];
if (rxconf == null) throw new ModuleLoadException("No regular expression patterns defined" + errorpfx);
// Accepting either array or single string
// TODO detection of regex values that go around these options or attempt advanced functionality
// TODO repeated code! simplify this a little.
if (rxconf.Type == JTokenType.Array)
{
foreach (var input in rxconf.Values<string>())
{
try
{
var r = new Regex(input, rxopts);
regexes.Add(r);
}
catch (ArgumentException)
{
throw new ModuleLoadException($"Failed to parse regular expression pattern '{input}'{errorpfx}");
}
}
}
else if (rxconf.Type == JTokenType.String)
{
var rxstr = rxconf.Value<string>();
try
{
var r = new Regex(rxstr, rxopts);
regexes.Add(r);
}
catch (ArgumentException)
{
throw new ModuleLoadException($"Failed to parse regular expression pattern '{rxstr}'{errorpfx}");
}
}
else
{
// TODO fix up wording of error message here
throw new ModuleLoadException("Unacceptable value given as a regular expession" + errorpfx);
}
Regex = regexes.AsReadOnly();
// ASR edit:
// Get command to be executed
Command = data["command"]?.Value<string>();
if (string.IsNullOrWhiteSpace(Command))
throw new ModuleLoadException("Value for 'command' is missing.");
// Filtering
Filter = new FilterList(data);
// Rate limiting
string rlstr = data["ratelimit"]?.Value<string>();
if (string.IsNullOrWhiteSpace(rlstr))
{
RateLimit = new RateLimit<ulong>();
}
else
{
if (ushort.TryParse(rlstr, out var rlval))
{
RateLimit = new RateLimit<ulong>(rlval);
}
else
{
throw new ModuleLoadException("Invalid rate limit value" + errorpfx);
}
}
// Random chance parameter
string randstr = data["RandomChance"]?.Value<string>();
double randval;
if (string.IsNullOrWhiteSpace(randstr))
{
randval = double.NaN;
}
else
{
if (!double.TryParse(randstr, out randval))
{
throw new ModuleLoadException("Random value is invalid (unable to parse)" + errorpfx);
}
if (randval > 1 || randval < 0)
{
throw new ModuleLoadException("Random value is invalid (not between 0 and 1)" + errorpfx);
}
}
RandomChance = randval;
}
/// <summary>
/// Checks the given message to determine if it matches this rule's constraints.
/// </summary>
/// <returns>True if the rule's response(s) should be executed.</returns>
public bool Match(SocketMessage m)
{
// Filter check
if (Filter.IsFiltered(m, true)) return false;
// Match check
bool matchFound = false;
foreach (var item in Regex)
{
// TODO determine maximum execution time for a regular expression match
if (item.IsMatch(m.Content))
{
matchFound = true;
break;
}
}
if (!matchFound) return false;
// Rate limit check - currently per channel
if (!RateLimit.Permit(m.Channel.Id)) return false;
// Random chance check
if (!double.IsNaN(RandomChance))
{
// Fail if randomly generated value is higher than the parameter
// Example: To fail a 75% chance, the check value must be between 0.75000...001 and 1.0.
var chk = Chance.NextDouble();
if (chk > RandomChance) return false;
}
return true;
}
// ASR edit: GetResponse() removed.
}
}

54
RegexBot-Modules/AutoScriptResponder/RateLimit.cs
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@ -1,54 +0,0 @@
using System;
using System.Collections.Generic;
namespace RegexBot.Modules.AutoScriptResponder
{
/// <summary>
/// Helper class for managing rate limit data.
/// </summary>
class RateLimit<T>
{
public const ushort DefaultTimeout = 20; // Skeeter's a cool guy and you can't convince me otherwise.
public ushort Timeout { get; }
private readonly object _lock = new object();
private Dictionary<T, DateTime> _table = new Dictionary<T, DateTime>();
public RateLimit() : this(DefaultTimeout) { }
public RateLimit(ushort timeout) => Timeout = timeout;
/// <summary>
/// 'Permit?' - Checks if the given value is permitted through the rate limit.
/// Executing this method may create a rate limit entry for the given value.
/// </summary>
/// <param name="id"></param>
/// <returns>True if the given value is permitted by the rate limiter.</returns>
public bool Permit(T value)
{
if (Timeout == 0) return true;
lock (_lock)
{
Clean();
if (_table.ContainsKey(value)) return false;
_table.Add(value, DateTime.Now);
}
return true;
}
/// <summary>
/// Clean up expired entries.
/// </summary>
private void Clean()
{
var now = DateTime.Now;
var newTable = new Dictionary<T, DateTime>();
foreach (var item in _table)
{
// Copy items that have not yet timed out to the new dictionary. Discard the rest.
if (item.Value.AddSeconds(Timeout) > now) newTable.Add(item.Key, item.Value);
}
lock (_lock) _table = newTable;
}
}
}

147
RegexBot-Modules/EntryRole/EntryRole.cs
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@ -1,147 +0,0 @@
using Discord.WebSocket;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
namespace RegexBot.Modules.EntryRole
{
/// <summary>
/// Automatically sets a role onto users entering the guild.
/// </summary>
// TODO add persistent role support, make it an option
[RegexbotModule]
public class EntryRole : ModuleBase
{
readonly Task _workerTask;
readonly CancellationTokenSource _workerTaskToken; // TODO make use of this when possible
public EntryRole(RegexbotClient bot) : base(bot)
{
DiscordClient.UserJoined += DiscordClient_UserJoined;
DiscordClient.UserLeft += DiscordClient_UserLeft;
_workerTaskToken = new CancellationTokenSource();
_workerTask = Task.Factory.StartNew(RoleApplyWorker, _workerTaskToken.Token,
TaskCreationOptions.LongRunning, TaskScheduler.Default);
}
private Task DiscordClient_UserJoined(SocketGuildUser arg)
{
GetGuildState<GuildData>(arg.Guild.Id)?.WaitlistAdd(arg.Id);
return Task.CompletedTask;
}
private Task DiscordClient_UserLeft(SocketGuildUser arg)
{
GetGuildState<GuildData>(arg.Guild.Id)?.WaitlistRemove(arg.Id);
return Task.CompletedTask;
}
public override Task<object> CreateGuildStateAsync(ulong guildID, JToken config)
{
if (config == null) return Task.FromResult<object>(null);
if (config.Type != JTokenType.Object)
throw new ModuleLoadException("Configuration is not properly defined.");
// Attempt to preserve existing timer list on reload
var oldconf = GetGuildState<GuildData>(guildID);
if (oldconf == null) return Task.FromResult<object>(new GuildData((JObject)config));
else return Task.FromResult<object>(new GuildData((JObject)config, oldconf.WaitingList));
}
/// <summary>
/// Main worker task.
/// </summary>
private async Task RoleApplyWorker()
{
while (!_workerTaskToken.IsCancellationRequested)
{
await Task.Delay(5000);
var subworkers = new List<Task>();
foreach (var g in DiscordClient.Guilds)
{
subworkers.Add(RoleApplyGuildSubWorker(g));
}
Task.WaitAll(subworkers.ToArray());
}
}
/// <summary>
/// Guild-specific processing by worker task.
/// </summary>
internal async Task RoleApplyGuildSubWorker(SocketGuild g)
{
var gconf = GetGuildState<GuildData>(g.Id);
if (gconf == null) return;
// Get list of users to be affected
ulong[] userIds;
lock (gconf.WaitingList)
{
if (gconf.WaitingList.Count == 0) return;
var now = DateTimeOffset.UtcNow;
var queryIds = from item in gconf.WaitingList
where item.Value > now
select item.Key;
userIds = queryIds.ToArray();
foreach (var item in userIds) gconf.WaitingList.Remove(item);
}
var gusers = new List<SocketGuildUser>();
foreach (var item in userIds)
{
var gu = g.GetUser(item);
if (gu == null) continue; // silently drop unknown users (is this fine?)
gusers.Add(gu);
}
if (gusers.Count == 0) return;
// Attempt to get role.
var targetRole = gconf.TargetRole.FindRoleIn(g, true);
if (targetRole == null)
{
await ReportFailure(g.Id, "Unable to determine role to be applied. Does it still exist?", gusers);
return;
}
// Apply roles
try
{
foreach (var item in gusers)
{
if (item.Roles.Contains(targetRole)) continue;
await item.AddRoleAsync(targetRole);
}
}
catch (Discord.Net.HttpException ex) when (ex.HttpCode == System.Net.HttpStatusCode.Forbidden)
{
await ReportFailure(g.Id, "Unable to set role due to a permissions issue.", gusers);
}
}
private async Task ReportFailure(ulong gid, string message, IEnumerable<SocketGuildUser> failedUserList)
{
var failList = new StringBuilder();
var count = 0;
foreach (var item in failedUserList) {
failList.Append($", {item.Username}#{item.Discriminator}");
count++;
if (count > 5)
{
failList.Append($"and {count} other(s).");
break;
}
}
failList.Remove(0, 2);
await LogAsync(gid, message + " Failed while attempting to set role on the following users: " + failList.ToString());
}
}
}

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RegexBot-Modules/EntryRole/GuildData.cs
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using RegexBot.Common;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
namespace RegexBot.Modules.EntryRole
{
/// <summary>
/// Contains configuration data as well as per-guild timers for those awaiting role assignment.
/// </summary>
class GuildData
{
/// <summary>
/// Lock on self.
/// </summary>
public Dictionary<ulong, DateTimeOffset> WaitingList { get; }
/// <summary>
/// Role to apply.
/// </summary>
public EntityName TargetRole { get; }
/// <summary>
/// Time to wait until applying the role, in seconds.
/// </summary>
public int WaitTime { get; }
const int WaitTimeMax = 600; // 10 minutes
public GuildData(JObject conf) : this(conf, new Dictionary<ulong, DateTimeOffset>()) { }
public GuildData(JObject conf, Dictionary<ulong, DateTimeOffset> _waitingList)
{
WaitingList = _waitingList;
var cfgRole = conf["Role"]?.Value<string>();
if (string.IsNullOrWhiteSpace(cfgRole))
throw new ModuleLoadException("Role value not specified.");
try
{
TargetRole = new EntityName(cfgRole);
}
catch (ArgumentException)
{
throw new ModuleLoadException("Role config value was not properly specified to be a role.");
}
try
{
WaitTime = conf["WaitTime"].Value<int>();
}
catch (NullReferenceException)
{
throw new ModuleLoadException("WaitTime value not specified.");
}
catch (InvalidCastException)
{
throw new ModuleLoadException("WaitTime value must be a number.");
}
if (WaitTime > WaitTimeMax)
{
// don't silently correct it
throw new ModuleLoadException($"WaitTime value may not exceed {WaitTimeMax} seconds.");
}
if (WaitTime < 0)
{
throw new ModuleLoadException("WaitTime value may not be negative.");
}
}
public void WaitlistAdd(ulong userId)
{
lock (WaitingList) WaitingList.Add(userId, DateTimeOffset.UtcNow.AddSeconds(WaitTime));
}
public void WaitlistRemove(ulong userId)
{
lock (WaitingList) WaitingList.Remove(userId);
}
}
}

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RegexBot-Modules/EntryTimeRole/EntryTimeRole.cs Normal file
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using System.Text;
namespace RegexBot.Modules.EntryTimeRole;
/// <summary>
/// Automatically sets a role onto users entering the guild after a predefined amount of time.
/// </summary>
[RegexbotModule]
public class EntryTimeRole : RegexbotModule {
readonly Task _workerTask;
readonly CancellationTokenSource _workerTaskToken; // TODO make use of this when possible
public EntryTimeRole(RegexbotClient bot) : base(bot) {
DiscordClient.UserJoined += DiscordClient_UserJoined;
DiscordClient.UserLeft += DiscordClient_UserLeft;
_workerTaskToken = new CancellationTokenSource();
_workerTask = Task.Factory.StartNew(RoleApplyWorker, _workerTaskToken.Token,
TaskCreationOptions.LongRunning, TaskScheduler.Default);
}
private Task DiscordClient_UserJoined(SocketGuildUser arg) {
GetGuildState<GuildData>(arg.Guild.Id)?.WaitlistAdd(arg.Id);
return Task.CompletedTask;
}
private Task DiscordClient_UserLeft(SocketGuild guild, SocketUser user) {
GetGuildState<GuildData>(guild.Id)?.WaitlistRemove(user.Id);
return Task.CompletedTask;
}
public override Task<object?> CreateGuildStateAsync(ulong guildID, JToken config) {
if (config == null) return Task.FromResult<object?>(null);
if (config.Type != JTokenType.Object)
throw new ModuleLoadException("Configuration is not properly defined.");
// Attempt to preserve existing timer list on reload
var oldconf = GetGuildState<GuildData>(guildID);
if (oldconf == null) return Task.FromResult<object?>(new GuildData((JObject)config));
else return Task.FromResult<object?>(new GuildData((JObject)config, oldconf.WaitingList));
}
/// <summary>
/// Main worker task.
/// </summary>
private async Task RoleApplyWorker() {
while (!_workerTaskToken.IsCancellationRequested) {
await Task.Delay(5000);
var subworkers = new List<Task>();
foreach (var g in DiscordClient.Guilds) {
subworkers.Add(RoleApplyGuildSubWorker(g));
}
Task.WaitAll(subworkers.ToArray());
}
}
/// <summary>
/// Guild-specific processing by worker task.
/// </summary>
internal async Task RoleApplyGuildSubWorker(SocketGuild g) {
var gconf = GetGuildState<GuildData>(g.Id);
if (gconf == null) return;
// Get list of users to be affected
ulong[] userIds;
lock (gconf.WaitingList) {
if (gconf.WaitingList.Count == 0) return;
var now = DateTimeOffset.UtcNow;
var queryIds = from item in gconf.WaitingList
where item.Value > now
select item.Key;
userIds = queryIds.ToArray();
foreach (var item in userIds) gconf.WaitingList.Remove(item);
}
var gusers = new List<SocketGuildUser>();
foreach (var item in userIds) {
var gu = g.GetUser(item);
if (gu == null) continue; // silently drop unknown users (is this fine?)
gusers.Add(gu);
}
if (gusers.Count == 0) return;
// Attempt to get role.
var targetRole = gconf.TargetRole.FindRoleIn(g, true);
if (targetRole == null) {
ReportFailure(g.Id, "Unable to determine role to be applied. Does it still exist?", gusers);
return;
}
// Apply roles
try {
foreach (var item in gusers) {
if (item.Roles.Contains(targetRole)) continue;
await item.AddRoleAsync(targetRole);
}
} catch (Discord.Net.HttpException ex) when (ex.HttpCode == System.Net.HttpStatusCode.Forbidden) {
ReportFailure(g.Id, "Unable to set role due to a permissions issue.", gusers);
}
}
private void ReportFailure(ulong gid, string message, IEnumerable<SocketGuildUser> failedUserList) {
var failList = new StringBuilder();
var count = 0;
foreach (var item in failedUserList) {
failList.Append($", {item.Username}#{item.Discriminator}");
count++;
if (count > 5) {
failList.Append($"and {count} other(s).");
break;
}
}
failList.Remove(0, 2);
Log(gid, message + " Failed while attempting to set role on the following users: " + failList.ToString());
}
}

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RegexBot-Modules/EntryTimeRole/GuildData.cs Normal file
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using RegexBot.Common;
namespace RegexBot.Modules.EntryTimeRole;
/// <summary>
/// Contains configuration data as well as per-guild timers for those awaiting role assignment.
/// </summary>
class GuildData {
/// <summary>
/// Lock on self.
/// </summary>
public Dictionary<ulong, DateTimeOffset> WaitingList { get; }
/// <summary>
/// Role to apply.
/// </summary>
public EntityName TargetRole { get; }
/// <summary>
/// Time to wait until applying the role, in seconds.
/// </summary>
public int WaitTime { get; }
const int WaitTimeMax = 600; // 10 minutes
public GuildData(JObject conf) : this(conf, new Dictionary<ulong, DateTimeOffset>()) { }
public GuildData(JObject conf, Dictionary<ulong, DateTimeOffset> _waitingList) {
WaitingList = _waitingList;
var cfgRole = conf["Role"]?.Value<string>();
if (string.IsNullOrWhiteSpace(cfgRole))
throw new ModuleLoadException("Role value not specified.");
try {
TargetRole = new EntityName(cfgRole);
} catch (ArgumentException) {
throw new ModuleLoadException("Role config value was not properly specified to be a role.");
}
try {
WaitTime = conf["WaitTime"].Value<int>();
} catch (NullReferenceException) {
throw new ModuleLoadException("WaitTime value not specified.");
} catch (InvalidCastException) {
throw new ModuleLoadException("WaitTime value must be a number.");
}
if (WaitTime > WaitTimeMax) {
// don't silently correct it
throw new ModuleLoadException($"WaitTime value may not exceed {WaitTimeMax} seconds.");
}
if (WaitTime < 0) {
throw new ModuleLoadException("WaitTime value may not be negative.");
}
}
public void WaitlistAdd(ulong userId) {
lock (WaitingList) WaitingList.Add(userId, DateTimeOffset.UtcNow.AddSeconds(WaitTime));
}
public void WaitlistRemove(ulong userId) {
lock (WaitingList) WaitingList.Remove(userId);
}
}

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global using Discord.WebSocket;
global using Newtonsoft.Json.Linq;

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RegexBot-Modules/PendingOutRole/ModuleConfig.cs Normal file
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using RegexBot.Common;
namespace RegexBot.Modules.PendingOutRole;
class ModuleConfig {
public EntityName Role { get; }
public ModuleConfig(JObject conf) {
var cfgRole = conf["Role"]?.Value<string>();
if (string.IsNullOrWhiteSpace(cfgRole))
throw new ModuleLoadException("Role was not specified.");
Role = new EntityName(cfgRole);
if (Role.Type != EntityType.Role)
throw new ModuleLoadException("Name specified in configuration is not a role.");
}
}

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RegexBot-Modules/PendingOutRole/PendingOutRole.cs Normal file
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namespace RegexBot.Modules.PendingOutRole;
/// <summary>
/// Automatically sets a specified role when a user is no longer in (gets out of) pending status -
/// that is, the user has passed the requirements needed to fully access the guild such as welcome messages, etc.
/// </summary>
[RegexbotModule]
public class PendingOutRole : RegexbotModule {
public PendingOutRole(RegexbotClient bot) : base(bot) {
DiscordClient.GuildAvailable += DiscordClient_GuildAvailable;
DiscordClient.GuildMemberUpdated += DiscordClient_GuildMemberUpdated;
}
private async Task DiscordClient_GuildAvailable(SocketGuild arg) {
var conf = GetGuildState<ModuleConfig>(arg.Id);
if (conf == null) return;
var trole = GetRole(arg);
if (trole == null) {
Log(arg.Id, "Unable to find target role to be applied. Was it renamed or deleted?");
return;
}
foreach (var user in arg.Users.Where(u => u.IsPending.HasValue && u.IsPending.Value == false)) {
if (user.Roles.Contains(trole)) continue;
await user.AddRoleAsync(trole);
}
}
private async Task DiscordClient_GuildMemberUpdated(Discord.Cacheable<SocketGuildUser, ulong> previous, SocketGuildUser current) {
var conf = GetGuildState<ModuleConfig>(current.Guild.Id);
if (conf == null) return;
if (!(previous.Value.IsPending.HasValue && current.IsPending.HasValue)) return;
if (previous.Value.IsPending == true && current.IsPending == false) {
var r = GetRole(current.Guild);
if (r == null) {
Log(current.Guild.Id, $"Failed to update {current} - was the role renamed or deleted?");
return;
}
await current.AddRoleAsync(r);
}
}
public override Task<object?> CreateGuildStateAsync(ulong guildID, JToken config) {
if (config == null) return Task.FromResult<object?>(null);
if (config.Type != JTokenType.Object)
throw new ModuleLoadException("Configuration for this section is invalid.");
return Task.FromResult<object?>(new ModuleConfig((JObject)config));
}
private SocketRole? GetRole(SocketGuild g) {
var conf = GetGuildState<ModuleConfig>(g.Id);
if (conf == null) return null;
if (conf.Role.Id.HasValue) {
var result = g.GetRole(conf.Role.Id.Value);
if (result != null) return result;
} else {
foreach (var role in g.Roles) {
if (string.Equals(conf.Role.Name, role.Name, StringComparison.OrdinalIgnoreCase)) return role;
}
}
Log(g.Id, "Unable to find role in " + g.Name);
return null;
}
}

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RegexBot-Modules/RateLimit.cs Normal file
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namespace RegexBot.Modules;
/// <summary>
/// Helper class for managing rate limit data.
/// More accurately, this class holds entries, not allowing the same entry to be held more than once until a specified
/// amount of time has paspsed since the entry was originally tracked; useful for a rate limit system.
/// </summary>
class RateLimit<T> {
public const ushort DefaultTimeout = 20; // Skeeter's a cool guy and you can't convince me otherwise.
public uint Timeout { get; }
#pragma warning disable CS8714
private Dictionary<T, DateTime> Entries { get; } = new Dictionary<T, DateTime>();
#pragma warning restore CS8714
public RateLimit() : this(DefaultTimeout) { }
public RateLimit(uint timeout) => Timeout = timeout;
/// <summary>
/// Checks if the given value is permitted through the rate limit.
/// Executing this method may create a rate limit entry for the given value.
/// </summary>
/// <returns>True if the given value is permitted by the rate limiter.</returns>
public bool IsPermitted(T value) {
if (Timeout == 0) return true;
// Take a moment to clean out expired entries
var now = DateTime.Now;
var expired = Entries.Where(x => x.Value.AddSeconds(Timeout) <= now).Select(x => x.Key).ToList();
foreach (var item in expired) Entries.Remove(item);
if (Entries.ContainsKey(value)) {
return false;
} else {
Entries.Add(value, DateTime.Now);
return true;
}
}
}