Added proper MessageCache configuration

Though it's now capable of loading configuration for the full
ModLogs module, not all features are available yet.

Module/ModLogs/EventType.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Noikoio.RegexBot.Module.ModLogs
+{
+    // Types of non-custom events that can be referenced by ModLogs in configuration.
+    // Enum value names will show themselves to the user in the form of strings valid in configuration,
+    // so try not to change those without good reason.
+    [Flags]
+    enum EventType
+    {
+        None        = 0x0,
+        Note        = 0x1,
+        Warn        = 0x2,
+        Kick        = 0x4,
+        Ban         = 0x8,
+        JoinGuild   = 0x10,
+        LeaveGuild  = 0x20,
+        NameChange  = 0x40,
+        MsgEdit     = 0x80,
+        MsgDelete   = 0x100
+    }
+}

Module/ModLogs/GuildConfig.cs

@@ -0,0 +1,127 @@
+using Newtonsoft.Json.Linq;
+using Noikoio.RegexBot.ConfigItem;
+using System;
+
+namespace Noikoio.RegexBot.Module.ModLogs
+{
+    /// <summary>
+    /// ModLogs guild-specific configuration values.
+    /// </summary>
+    class GuildConfig
+    {
+        // Event reporting
+        private readonly EntityName _rptTarget;
+        private EventType _rptTypes;
+        /// <summary>
+        /// Target reporting channel.
+        /// </summary>
+        public EntityName? RptTarget => _rptTarget;
+        /// <summary>
+        /// Event types to send to the reporting channel.
+        /// </summary>
+        public EventType RptTypes => _rptTypes;
+
+        // Query command
+        private readonly string _qCmd; // command name
+        private readonly EntityList _qAccess; // list of those able to issue the command
+        private readonly EventType _qDefaultAnswer; // default entry types to display
+        /// <summary>
+        /// Query command. The first word in an incoming message, including prefix, that triggers a query.
+        /// </summary>
+        public string QrCommand => _qCmd;
+        /// <summary>
+        /// List of users permitted to invoke the query command.
+        /// If null, refer to the guild's Moderators list.
+        /// </summary>
+        public EntityList QrPermittedUsers => _qAccess;
+        /// <summary>
+        /// Event types to display in a query.
+        /// </summary>
+        public EventType QrTypes => _qDefaultAnswer;
+
+        public GuildConfig(JObject cfgRoot)
+        {
+            // AutoReporting settings
+            var arcfg = cfgRoot["AutoReporting"];
+            if (arcfg == null)
+            {
+                _rptTarget = default(EntityName); // NOTE: Change this if EntityName becomes a class later
+                _rptTypes = EventType.None;
+            }
+            else if (arcfg.Type == JTokenType.Object)
+            {
+                string chval = arcfg["Channel"]?.Value<string>();
+                if (chval == null) throw new RuleImportException("Reporting channel is not defined.");
+                if (!string.IsNullOrWhiteSpace(chval) && chval[0] == '#')
+                    _rptTarget = new EntityName(chval.Substring(1, chval.Length-1), EntityType.Channel);
+                else
+                    throw new RuleImportException("Reporting channel is not properly defined.");
+                // Require the channel's ID for now.
+                if (!_rptTarget.Id.HasValue) throw new RuleImportException("Reporting channel's ID must be specified.");
+
+                // TODO make optional
+                string rpval = arcfg["Events"]?.Value<string>();
+                _rptTypes = GetTypesFromString(rpval);
+            }
+            else
+            {
+                throw new RuleImportException("Section for AutoReporting is not correctly defined.");
+            }
+            
+            // QueryCommand settings
+            var qccfg = cfgRoot["QueryCommand"];
+            if (qccfg == null)
+            {
+                _qCmd = null;
+                _qAccess = null;
+                _qDefaultAnswer = EventType.None;
+            }
+            else if (arcfg.Type == JTokenType.Object)
+            {
+                _qCmd = arcfg["Command"]?.Value<string>();
+                if (string.IsNullOrWhiteSpace(_qCmd))
+                    throw new RuleImportException("Query command option must have a value.");
+                if (_qCmd.Contains(" "))
+                    throw new RuleImportException("Query command must not contain spaces.");
+
+                var acl = arcfg["AllowedUsers"];
+                if (acl == null) _qAccess = null;
+                else _qAccess = new EntityList(acl);
+
+                // TODO make optional
+                string ansval = arcfg["DefaultEvents"]?.Value<string>();
+                _qDefaultAnswer = GetTypesFromString(ansval);
+            }
+            else
+            {
+                throw new RuleImportException("Section for QueryCommand is not correctly defined.");
+            }
+        }
+
+        public static EventType GetTypesFromString(string input)
+        {
+            if (string.IsNullOrWhiteSpace(input))
+                throw new RuleImportException("Types are not properly defined.");
+
+            var strTypes = input.Split(
+                new char[] { ' ', ',', '/', '+' }, // and more?
+                StringSplitOptions.RemoveEmptyEntries);
+
+            EventType endResult = EventType.None;
+            foreach (var item in strTypes)
+            {
+                try
+                {
+                    var result = Enum.Parse<EventType>(item, true);
+                    endResult |= result;
+                }
+                catch (ArgumentException)
+                {
+                    throw new RuleImportException($"Unable to determine the given event type \"{item}\"");
+                }
+            }
+
+            return endResult;
+        }
+    }
+}

Module/ModLogs/MessageCache.cs

@@ -9,9 +9,9 @@ using System.Threading.Tasks;
 namespace Noikoio.RegexBot.Module.ModLogs
 {
     /// <summary>
-    /// Helper class for <see cref="ModLogs"/>. Keeps a database-backed cache of recent messages and assists
+    /// Helper class for <see cref="ModLogs"/>. Keeps a database-backed cache of recent messages for use
     /// in reporting message changes and deletions, if configured to do so.
-    /// Does not manipulate the moderation log managed by the main class, but rather provides supplemental features.
+    /// Despite its place, it does not manipulate moderation logs. It simply pulls from the same configuration.
     /// </summary>
     class MessageCache
     {
@@ -66,6 +66,7 @@ namespace Noikoio.RegexBot.Module.ModLogs
 
         private async Task Client_MessageDeleted(Cacheable<Discord.IMessage, ulong> msg, ISocketMessageChannel channel)
         {
+            if (channel is IDMChannel) return; // No DMs
             await ProcessReportMessage(true, msg.Id, channel, null);
         }
         #endregion
@@ -84,11 +85,13 @@ namespace Noikoio.RegexBot.Module.ModLogs
             else return;
 
             // Check if this feature is enabled before doing anything else.
-            var rptTarget = _outGetConfig(guildId) as ConfigItem.EntityName?;
+            var cfg = _outGetConfig(guildId) as GuildConfig;
-            if (!rptTarget.HasValue) return;
+            if (cfg == null) return;
+            if (isDelete && (cfg.RptTypes & EventType.MsgDelete) == 0) return;
+            if (!isDelete && (cfg.RptTypes & EventType.MsgEdit) == 0) return;
 
             // Ignore if it's a message being deleted withing the reporting channel.
-            if (isDelete && rptTarget.Value.Id.Value == ch.Id) return;
+            if (isDelete && cfg.RptTarget.Value.Id.Value == ch.Id) return;
 
             // Regardless of delete or edit, it is necessary to get the equivalent database information.
             EntityCache.CacheUser ucd = null;
@@ -128,11 +131,11 @@ namespace Noikoio.RegexBot.Module.ModLogs
             }
 
             // Find target channel, prepare and send out message
-            var rptTargetChannel = _dClient.GetGuild(guildId)?.GetTextChannel(rptTarget.Value.Id.Value);
+            var g = _dClient.GetGuild(guildId);
+            var rptTargetChannel = g?.GetTextChannel(cfg.RptTarget.Value.Id.Value);
             if (rptTargetChannel == null)
             {
-                await _outLog("Target channel not found.");
+                await _outLog($"WARNING: Reporting channel {cfg.RptTarget.Value.ToString()} could not be determined.");
-                // TODO make a more descriptive error message
                 return;
             }
             var em = CreateReportEmbed(isDelete, ucd, messageId, ch, (cacheMsg, editMsg));

Module/ModLogs/ModLogs.cs

@@ -23,9 +23,11 @@ namespace Noikoio.RegexBot.Module.ModLogs
             // Do nothing if database unavailable. The user will be informed by ProcessConfiguration.
             if (!RegexBot.Config.DatabaseAvailable) return;
             
+            // MessageCache (reporting of MessageEdit, MessageDelete) handled by helper class
             _msgCacheInstance = new MessageCache(client, Log, GetConfig);
 
-            //throw new NotImplementedException();
+            // TODO add handlers for detecting joins, leaves, bans, kicks, user edits (nick/username/discr)
+            // TODO add handler for processing the log query command
         }
 
         [ConfigSection("ModLogs")]
@@ -33,46 +35,14 @@ namespace Noikoio.RegexBot.Module.ModLogs
         {
             if (configSection.Type != JTokenType.Object)
                 throw new RuleImportException("Configuration for this section is invalid.");
-            var conf = (JObject)configSection;
             
             if (!RegexBot.Config.DatabaseAvailable)
             {
                 await Log("Database access is not available. This module be unavailable.");
                 return null;
             }
-            
-            try
-            {
-                // MessageCache testing: will store an EntityName or die trying
-                EntityName? mctarget = new EntityName(conf["mctarget"].Value<string>(), EntityType.Channel);
-                await Log("Enabled MessageCache test on " + mctarget.Value.ToString());
-                return mctarget;
-            }
-            catch (Exception)
-            {
-                // well, not really die
-                return null;
-            }
 
-            /*
+            return new GuildConfig((JObject)configSection);
-             * Concept:
-             *  "ModLogs": {
-             *      "AutoReporting": {
-             *          // behavior for how to output to the reporting channel
-             *          // MessageCache looks for configuration values within here.
-             *          "Channel": "something compatible with EntityName",
-             *          "Events": "perhaps a single string of separated event types"
-             *      },
-             *      "QueryOptions": {
-             *          // Behavior for the query command (which is defined here rather than ModTools)
-             *          // Need to stress in the documentation that "msgedit" and "msgdelete" events
-             *          // are not kept and cannot be queried
-             *          "QueryCommand": "!modlogs",
-             *          "Permission": "Moderators", // either a string that says "Moderators" or an EntityList
-             *          "DefaultQueryEvents": "another single string of separated event types",
-             *      }
-             *  }
-             */
         }
     }
 }