Implement new database methods in existing code

ApplicationCommands.cs

@@ -3,9 +3,9 @@ using NodaTime;
 using System.Collections.ObjectModel;
 using System.Globalization;
 using System.Text;
+using WorldTime.Data;
 
 namespace WorldTime;
-
 public class ApplicationCommands : InteractionModuleBase<ShardedInteractionContext> {
     const string ErrNotAllowed = ":x: Only server moderators may use this command.";
 
@@ -30,7 +30,7 @@ public class ApplicationCommands : InteractionModuleBase<ShardedInteractionConte
     private static readonly ReadOnlyDictionary<string, string> _tzNameMap;
 
     public DiscordShardedClient ShardedClient { get; set; } = null!;
-    public Database Database { get; set; } = null!;
+    public BotDatabaseContext DbContext { get; set; } = null!;
 
     static ApplicationCommands() {
         Dictionary<string, string> tzNameMap = new(StringComparer.OrdinalIgnoreCase);
@@ -42,7 +42,8 @@ public class ApplicationCommands : InteractionModuleBase<ShardedInteractionConte
     public async Task CmdHelp() {
         var version = System.Reflection.Assembly.GetExecutingAssembly().GetName().Version!.ToString(3);
         var guildct = ShardedClient.Guilds.Count;
-        var uniquetz = await Database.GetDistinctZoneCountAsync();
+        using var db = DbContext;
+        var uniquetz = db.GetDistinctZoneCount();
         await RespondAsync(embed: new EmbedBuilder() {
             Title = "Help & About",
             Description = $"World Time v{version} - Serving {guildct} communities across {uniquetz} time zones.\n\n"
@@ -69,12 +70,19 @@ public class ApplicationCommands : InteractionModuleBase<ShardedInteractionConte
             return;
         }
 
-        if (user != null) {
+        if (user == null) {
-            await CmdListUserAsync(user);
+            // No parameter - full listing
-            return;
+            await CmdListWithoutParamAsync();
+        } else {
+            // Has parameter - do single user listing
+            await CmdListWithUserParamAsync(user);
         }
+    }
 
-        var userlist = await Database.GetGuildZonesAsync(Context.Guild.Id);
+    private async Task CmdListWithoutParamAsync() {
+        // Called by CmdList
+        using var db = DbContext;
+        var userlist = db.GetGuildZones(Context.Guild.Id);
         if (userlist.Count == 0) {
             await RespondAsync(":x: Nothing to show. Register your time zones with the bot using the `/set` command.");
             return;
@@ -138,9 +146,10 @@ public class ApplicationCommands : InteractionModuleBase<ShardedInteractionConte
         }
     }
 
-    private async Task CmdListUserAsync(SocketGuildUser parameter) {
+    private async Task CmdListWithUserParamAsync(SocketGuildUser parameter) {
-        // Not meant as a command handler - called by CmdList
+        // Called by CmdList
-        var result = await Database.GetUserZoneAsync(parameter);
+        using var db = DbContext;
+        var result = db.GetUserZone(parameter);
         if (result == null) {
             bool isself = Context.User.Id == parameter.Id;
             if (isself) await RespondAsync(":x: You do not have a time zone. Set it with `tz.set`.", ephemeral: true);
@@ -159,7 +168,8 @@ public class ApplicationCommands : InteractionModuleBase<ShardedInteractionConte
             await RespondAsync(ErrInvalidZone, ephemeral: true);
             return;
         }
-        await Database.UpdateUserAsync((SocketGuildUser)Context.User, parsedzone);
+        using var db = DbContext;
+        db.UpdateUser((SocketGuildUser)Context.User, parsedzone);
         await RespondAsync($":white_check_mark: Your time zone has been set to **{parsedzone}**.");
     }
 
@@ -179,14 +189,16 @@ public class ApplicationCommands : InteractionModuleBase<ShardedInteractionConte
             return;
         }
 
-        await Database.UpdateUserAsync(user, newtz).ConfigureAwait(false);
+        using var db = DbContext;
+        db.UpdateUser(user, newtz);
         await RespondAsync($":white_check_mark: Time zone for **{user}** set to **{newtz}**.");
     }
 
     [RequireGuildContext]
     [SlashCommand("remove", HelpRemove)]
     public async Task CmdRemove() {
-        var success = await Database.DeleteUserAsync((SocketGuildUser)Context.User);
+        using var db = DbContext;
+        var success = db.DeleteUser((SocketGuildUser)Context.User);
         if (success) await RespondAsync(":white_check_mark: Your zone has been removed.");
         else await RespondAsync(":x: You don't have a time zone set.");
     }
@@ -199,7 +211,8 @@ public class ApplicationCommands : InteractionModuleBase<ShardedInteractionConte
             return;
         }
 
-        if (await Database.DeleteUserAsync(user))
+        using var db = DbContext;
+        if (db.DeleteUser(user))
             await RespondAsync($":white_check_mark: Removed zone information for {user}.");
         else
             await RespondAsync($":white_check_mark: No time zone is set for {user}.");

CommandsText.cs

@@ -1,11 +1,13 @@
-using NodaTime;
+using Microsoft.Extensions.DependencyInjection;
+using NodaTime;
 using System.Collections.ObjectModel;
 using System.Globalization;
 using System.Text;
 using System.Text.RegularExpressions;
+using WorldTime.Data;
 
 namespace WorldTime;
-
+[Obsolete("Text commands are deprecated and will be removed soon.")]
 internal class CommandsText {
 #if DEBUG
     public const string CommandPrefix = "tt.";
@@ -15,9 +17,11 @@ internal class CommandsText {
     delegate Task Command(SocketTextChannel channel, SocketGuildUser sender, SocketMessage message);
 
     private readonly Dictionary<string, Command> _commands;
-    private readonly Database _database;
+    private readonly IServiceProvider _services;
     private readonly WorldTime _instance;
 
+    private BotDatabaseContext Database => _services.GetRequiredService<BotDatabaseContext>();
+
     private static readonly Regex _userExplicit;
     private static readonly Regex _userMention;
     private static readonly ReadOnlyDictionary<string, string> _tzNameMap;
@@ -38,9 +42,9 @@ internal class CommandsText {
         _tzNameMap = new(tzNameMap);
     }
 
-    public CommandsText(WorldTime inst, Database db) {
+    public CommandsText(WorldTime inst, IServiceProvider services) {
         _instance = inst;
-        _database = db;
+        _services = services;
         _commands = new(StringComparer.OrdinalIgnoreCase) {
             { "help", CmdHelp },
             { "list", CmdList },
@@ -60,7 +64,7 @@ internal class CommandsText {
 
         var msgsplit = message.Content.Split(' ', 2, StringSplitOptions.RemoveEmptyEntries);
         if (msgsplit.Length == 0 || msgsplit[0].Length < 4) return;
-        if (msgsplit[0].StartsWith(CommandPrefix, StringComparison.OrdinalIgnoreCase)) { // TODO add support for multiple prefixes?
+        if (msgsplit[0].StartsWith(CommandPrefix, StringComparison.OrdinalIgnoreCase)) {
             var cmdBase = msgsplit[0][3..];
             if (_commands.ContainsKey(cmdBase)) {
                 Program.Log("Command invoked", $"{channel.Guild.Name}/{message.Author} {message.Content}");
@@ -74,9 +78,10 @@ internal class CommandsText {
     }
 
     private async Task CmdHelp(SocketTextChannel channel, SocketGuildUser sender, SocketMessage message) {
+        using var db = Database;
         var version = System.Reflection.Assembly.GetExecutingAssembly().GetName().Version!.ToString(3);
         var guildct = _instance.DiscordClient.Guilds.Count;
-        var uniquetz = await _database.GetDistinctZoneCountAsync();
+        var uniquetz = db.GetDistinctZoneCount();
         await channel.SendMessageAsync(embed: new EmbedBuilder() {
             Color = new Color(0xe0f2f7),
             Title = "Help & About",
@@ -118,7 +123,8 @@ internal class CommandsText {
                 return;
             }
 
-            var result = await _database.GetUserZoneAsync(usersearch).ConfigureAwait(false);
+            using var db = Database;
+            var result = db.GetUserZone(usersearch);
             if (result == null) {
                 bool isself = sender.Id == usersearch.Id;
                 if (isself) await channel.SendMessageAsync(":x: You do not have a time zone. Set it with `tz.set`.").ConfigureAwait(false);
@@ -130,7 +136,8 @@ internal class CommandsText {
             await channel.SendMessageAsync(embed: new EmbedBuilder().WithDescription(resulttext).Build()).ConfigureAwait(false);
         } else {
             // Does not have parameter - build full list
-            var userlist = await _database.GetGuildZonesAsync(channel.Guild.Id).ConfigureAwait(false);
+            using var db = Database;
+            var userlist = db.GetGuildZones(channel.Guild.Id);
             if (userlist.Count == 0) {
                 await channel.SendMessageAsync(":x: Nothing to show. " +
                     $"To register time zones with the bot, use the `{CommandPrefix}set` command.").ConfigureAwait(false);
@@ -196,7 +203,8 @@ internal class CommandsText {
             await channel.SendMessageAsync(ErrInvalidZone).ConfigureAwait(false);
             return;
         }
-        await _database.UpdateUserAsync(sender, input).ConfigureAwait(false);
+        using var db = Database;
+        db.UpdateUser(sender, input);
         await channel.SendMessageAsync($":white_check_mark: Your time zone has been set to **{input}**.").ConfigureAwait(false);
     }
 
@@ -229,12 +237,14 @@ internal class CommandsText {
             return;
         }
 
-        await _database.UpdateUserAsync(targetuser, newtz).ConfigureAwait(false);
+        using var db = Database;
+        db.UpdateUser(targetuser, newtz);
         await channel.SendMessageAsync($":white_check_mark: Time zone for **{targetuser}** set to **{newtz}**.").ConfigureAwait(false);
     }
 
     private async Task CmdRemove(SocketTextChannel channel, SocketGuildUser sender, SocketMessage message) {
-        var success = await _database.DeleteUserAsync(sender).ConfigureAwait(false);
+        using var db = Database;
+        var success = db.DeleteUser(sender);
         if (success) await channel.SendMessageAsync(":white_check_mark: Your zone has been removed.").ConfigureAwait(false);
         else await channel.SendMessageAsync(":x: You don't have a time zone set.");
     }
@@ -259,7 +269,8 @@ internal class CommandsText {
             return;
         }
 
-        await _database.DeleteUserAsync(targetuser).ConfigureAwait(false);
+        using var db = Database;
+        db.DeleteUser(targetuser);
         await channel.SendMessageAsync($":white_check_mark: Removed zone information for {targetuser}.");
     }
 
@@ -346,7 +357,6 @@ internal class CommandsText {
     /// </summary>
     private static bool IsUserAdmin(SocketGuildUser user)
         => user.GuildPermissions.Administrator || user.GuildPermissions.ManageGuild;
-    // TODO port modrole feature from BB, implement in here
 
     /// <summary>
     /// Checks if the member cache for the specified guild needs to be filled, and sends a request if needed.

Program.cs

@@ -18,16 +18,10 @@ class Program {
             Environment.Exit((int)ExitCodes.ConfigError);
         }
 
-        Database? d = null;
+        Data.BotDatabaseContext.NpgsqlConnectionString = cfg.DbConnectionString;
-        try {
-            d = new(cfg.DbConnectionString);
-        } catch (Npgsql.NpgsqlException e) {
-            Console.WriteLine("Error when attempting to connect to database: " + e.Message);
-            Environment.Exit((int)ExitCodes.DatabaseError);
-        }
 
         Console.CancelKeyPress += OnCancelKeyPressed;
-        _bot = new WorldTime(cfg, d);
+        _bot = new WorldTime(cfg);
         await _bot.StartAsync().ConfigureAwait(false);
 
         await Task.Delay(-1).ConfigureAwait(false);

WorldTime.cs

@@ -4,6 +4,7 @@ using Discord.Interactions;
 using Microsoft.Extensions.DependencyInjection;
 using System.Reflection;
 using System.Text;
+using WorldTime.Data;
 
 namespace WorldTime;
 
@@ -33,10 +34,9 @@ internal class WorldTime : IDisposable {
 
     internal Configuration Config { get; }
     internal DiscordShardedClient DiscordClient => _services.GetRequiredService<DiscordShardedClient>();
-    internal Database Database => _services.GetRequiredService<Database>();
 
-    public WorldTime(Configuration cfg, Database d) {
+    public WorldTime(Configuration cfg) {
-        var ver = System.Reflection.Assembly.GetExecutingAssembly().GetName().Version;
+        var ver = Assembly.GetExecutingAssembly().GetName().Version;
         Program.Log(nameof(WorldTime), $"Version {ver!.ToString(3)} is starting...");
 
         Config = cfg;
@@ -51,7 +51,7 @@ internal class WorldTime : IDisposable {
         _services = new ServiceCollection()
             .AddSingleton(new DiscordShardedClient(clientConf))
             .AddSingleton(s => new InteractionService(s.GetRequiredService<DiscordShardedClient>()))
-            .AddSingleton(d)
+            .AddTransient(typeof(BotDatabaseContext))
             .BuildServiceProvider();
         DiscordClient.Log += DiscordClient_Log;
         DiscordClient.ShardReady += DiscordClient_ShardReady;
@@ -60,7 +60,7 @@ internal class WorldTime : IDisposable {
         DiscordClient.InteractionCreated += DiscordClient_InteractionCreated;
         iasrv.SlashCommandExecuted += InteractionService_SlashCommandExecuted;
 
-        _commandsTxt = new CommandsText(this, Database);
+        _commandsTxt = new CommandsText(this, _services);
 
         // Start status reporting thread
         _mainCancel = new CancellationTokenSource();
@@ -189,10 +189,12 @@ internal class WorldTime : IDisposable {
 
         // Proactively fill guild user cache if the bot has any data for the respective guild
         // Can skip an extra query if the last_seen update is known to have been successful, otherwise query for any users
-        var guild = channel.Guild;
+        if (!channel.Guild.HasAllMembers) {
-        if (!guild.HasAllMembers && await Database.HasAnyAsync(guild)) {
+            using var db = _services.GetRequiredService<BotDatabaseContext>();
-            // Event handler hangs if awaited normally or used with Task.Run
+            if (db.HasAnyUsers(channel.Guild)) {
-            await Task.Factory.StartNew(guild.DownloadUsersAsync);
+                // Event handler hangs if awaited normally or used with Task.Run
+                await Task.Factory.StartNew(channel.Guild.DownloadUsersAsync);
+            }
         }
     }