Add 12-hour time format (implements #2)

Commands/CommandsBase.cs

@@ -25,16 +25,20 @@ public class CommandsBase : InteractionModuleBase<ShardedInteractionContext> {
 
     /// <summary>
     /// Returns a string displaying the current time in the given time zone.
-    /// The result begins with four numbers for sorting purposes. Must be trimmed before output.
+    /// The result begins with six numbers for sorting purposes. Must be trimmed before output.
     /// </summary>
-    protected static string TzPrint(string zone) {
+    protected static string TzPrint(string zone, bool use12hr) {
         var tzdb = DateTimeZoneProviders.Tzdb;
         DateTimeZone tz = tzdb.GetZoneOrNull(zone)!;
         if (tz == null) throw new Exception("Encountered unknown time zone: " + zone);
 
         var now = SystemClock.Instance.GetCurrentInstant().InZone(tz);
-        var sortpfx = now.ToString("MMdd", DateTimeFormatInfo.InvariantInfo);
-        var fullstr = now.ToString("dd'-'MMM' 'HH':'mm' 'x' (UTC'o<g>')'", DateTimeFormatInfo.InvariantInfo);
+        var sortpfx = now.ToString("MMddHH", DateTimeFormatInfo.InvariantInfo);
+        string fullstr;
+        if (use12hr) {
+            var ap = now.ToString("tt", DateTimeFormatInfo.InvariantInfo).ToLowerInvariant();
+            fullstr = now.ToString($"MMM' 'dd', 'hh':'mm'{ap} 'x' (UTC'o<g>')'", DateTimeFormatInfo.InvariantInfo);
+        } else fullstr = now.ToString("dd'-'MMM', 'HH':'mm' 'x' (UTC'o<g>')'", DateTimeFormatInfo.InvariantInfo);
         return $"{sortpfx}● `{fullstr}`";
     }
 

Commands/ConfigCommands.cs

@@ -0,0 +1,28 @@
+using Discord.Interactions;
+
+namespace WorldTime.Commands;
+[Group("config", HelpSettings)]
+public class ConfigCommands : CommandsBase {
+    internal const string HelpSettings = "Configuration commands for World Time.";
+    internal const string HelpUse12 = "Sets whether to use the 12-hour (AM/PM) format in time zone listings.";
+
+    [RequireGuildContext]
+    [SlashCommand("use-12hour", HelpUse12)]
+    public async Task Cmd12Hour([Summary(description: "True to enable, False to disable.")] bool setting) {
+        if (!IsUserAdmin((SocketGuildUser)Context.User)) {
+            await RespondAsync(ErrNotAllowed, ephemeral: true);
+            return;
+        }
+
+        using var db = DbContext;
+        var gs = db.GuildSettings.Where(r => r.GuildId == Context.Guild.Id).SingleOrDefault();
+        if (gs == null) {
+            gs = new() { GuildId = Context.Guild.Id };
+            db.Add(gs);
+        }
+
+        gs.Use12HourTime = setting;
+        await db.SaveChangesAsync();
+        await RespondAsync($":white_check_mark: Time listing set to **{(setting ? "AM/PM" : "24 hour")}** format.");
+    }
+}

Commands/UserCommands.cs

@@ -2,12 +2,16 @@
 using System.Text;
 
 namespace WorldTime.Commands;
-public class ApplicationCommands : CommandsBase {
-    const string EmbedHelpField1 = $"`/help` - {HelpHelp}\n"
+public class UserCommands : CommandsBase {
+    const string EmbedHelpField1 =
+        $"`/help` - {HelpHelp}\n"
         + $"`/list` - {HelpList}\n"
         + $"`/set` - {HelpSet}\n"
         + $"`/remove` - {HelpRemove}";
-    const string EmbedHelpField2 = $"`/set-for` - {HelpSetFor}\n`/remove-for` - {HelpRemoveFor}";
+    const string EmbedHelpField2 =
+        $"`/config use-12hour` - {ConfigCommands.HelpUse12}\n"
+        + $"`/set-for` - {HelpSetFor}\n"
+        + $"`/remove-for` - {HelpRemoveFor}";
 
     #region Help strings
     const string HelpHelp = "Displays a list of available bot commands.";
@@ -67,23 +71,25 @@ public class ApplicationCommands : CommandsBase {
             await RespondAsync(":x: Nothing to show. Register your time zones with the bot using the `/set` command.");
             return;
         }
+        
         // Order times by popularity to limit how many are shown, group by printed name
         var sortedlist = new SortedDictionary<string, List<ulong>>();
+        var ampm = db.GuildSettings.Where(s => s.GuildId == Context.Guild.Id).SingleOrDefault()?.Use12HourTime ?? false;
         foreach ((string area, List<ulong> users) in userlist.OrderByDescending(o => o.Value.Count).Take(20)) {
             // Filter further to top 20 distinct timezones, even if they are not displayed in the final result
-            var areaprint = TzPrint(area);
+            var areaprint = TzPrint(area, ampm);
             if (!sortedlist.ContainsKey(areaprint)) sortedlist.Add(areaprint, new List<ulong>());
             sortedlist[areaprint].AddRange(users);
         }
 
         const int MaxSingleLineLength = 750;
-        const int MaxSingleOutputLength = 900;
+        const int MaxSingleOutputLength = 3000;
 
         // Build zone listings with users
         var outputlines = new List<string>();
         foreach ((string area, List<ulong> users) in sortedlist) {
             var buffer = new StringBuilder();
-            buffer.Append(area[4..] + ": ");
+            buffer.Append(area[6..] + ": ");
             bool empty = true;
             foreach (var userid in users) {
                 var userinstance = Context.Guild.GetUser(userid);
@@ -137,7 +143,8 @@ public class ApplicationCommands : CommandsBase {
             return;
         }
 
-        var resulttext = TzPrint(result)[4..] + ": " + FormatName(parameter);
+        var ampm = db.GuildSettings.Where(s => s.GuildId == Context.Guild.Id).SingleOrDefault()?.Use12HourTime ?? false;
+        var resulttext = TzPrint(result, ampm)[6..] + ": " + FormatName(parameter);
         await RespondAsync(embed: new EmbedBuilder().WithDescription(resulttext).Build());
     }
 

Data/BotDatabaseContext.cs

@@ -17,6 +17,7 @@ public class BotDatabaseContext : DbContext {
     }
 
     public DbSet<UserEntry> UserEntries { get; set; } = null!;
+    public DbSet<GuildConfiguration> GuildSettings { get; set; } = null!;
 
     protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
          => optionsBuilder
@@ -24,9 +25,8 @@ public class BotDatabaseContext : DbContext {
             .UseSnakeCaseNamingConvention();
 
     protected override void OnModelCreating(ModelBuilder modelBuilder) {
-        modelBuilder.Entity<UserEntry>(entity => {
-            entity.HasKey(e => new { e.GuildId, e.UserId }).HasName("userdata_pkey");
-        });
+        modelBuilder.Entity<UserEntry>().HasKey(e => new { e.GuildId, e.UserId }).HasName("userdata_pkey");
+        modelBuilder.Entity<GuildConfiguration>().Property(p => p.Use12HourTime).HasDefaultValue(false);
     }
 
     #region Helper methods / abstractions

Data/GuildConfiguration.cs

@@ -0,0 +1,9 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace WorldTime.Data;
+public class GuildConfiguration {
+    [Key]
+    public ulong GuildId { get; set; }
+
+    public bool Use12HourTime { get; set; }
+}

Data/Migrations/20230115041447_Add12HrSetting.Designer.cs

@@ -0,0 +1,69 @@
+// <auto-generated />
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+using WorldTime.Data;
+
+#nullable disable
+
+namespace WorldTime.Data.Migrations
+{
+    [DbContext(typeof(BotDatabaseContext))]
+    [Migration("20230115041447_Add12HrSetting")]
+    partial class Add12HrSetting
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "7.0.1")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("WorldTime.Data.GuildConfiguration", b =>
+                {
+                    b.Property<decimal>("GuildId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("numeric(20,0)")
+                        .HasColumnName("guild_id");
+
+                    b.Property<bool>("Use12HourTime")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("boolean")
+                        .HasDefaultValue(false)
+                        .HasColumnName("use12hour_time");
+
+                    b.HasKey("GuildId")
+                        .HasName("pk_guild_settings");
+
+                    b.ToTable("guild_settings", (string)null);
+                });
+
+            modelBuilder.Entity("WorldTime.Data.UserEntry", b =>
+                {
+                    b.Property<long>("GuildId")
+                        .HasColumnType("bigint")
+                        .HasColumnName("guild_id");
+
+                    b.Property<long>("UserId")
+                        .HasColumnType("bigint")
+                        .HasColumnName("user_id");
+
+                    b.Property<string>("TimeZone")
+                        .IsRequired()
+                        .HasColumnType("text")
+                        .HasColumnName("zone");
+
+                    b.HasKey("GuildId", "UserId")
+                        .HasName("userdata_pkey");
+
+                    b.ToTable("userdata", (string)null);
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

Data/Migrations/20230115041447_Add12HrSetting.cs

@@ -0,0 +1,33 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace WorldTime.Data.Migrations
+{
+    /// <inheritdoc />
+    public partial class Add12HrSetting : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "guild_settings",
+                columns: table => new
+                {
+                    guildid = table.Column<decimal>(name: "guild_id", type: "numeric(20,0)", nullable: false),
+                    use12hourtime = table.Column<bool>(name: "use12hour_time", type: "boolean", nullable: false, defaultValue: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("pk_guild_settings", x => x.guildid);
+                });
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "guild_settings");
+        }
+    }
+}

Data/Migrations/BotDatabaseContextModelSnapshot.cs

@@ -16,11 +16,30 @@ namespace WorldTime.Data.Migrations
         {
 #pragma warning disable 612, 618
             modelBuilder
-                .HasAnnotation("ProductVersion", "6.0.6")
+                .HasAnnotation("ProductVersion", "7.0.1")
                 .HasAnnotation("Relational:MaxIdentifierLength", 63);
 
             NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
 
+            modelBuilder.Entity("WorldTime.Data.GuildConfiguration", b =>
+                {
+                    b.Property<decimal>("GuildId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("numeric(20,0)")
+                        .HasColumnName("guild_id");
+
+                    b.Property<bool>("Use12HourTime")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("boolean")
+                        .HasDefaultValue(false)
+                        .HasColumnName("use12hour_time");
+
+                    b.HasKey("GuildId")
+                        .HasName("pk_guild_settings");
+
+                    b.ToTable("guild_settings", (string)null);
+                });
+
             modelBuilder.Entity("WorldTime.Data.UserEntry", b =>
                 {
                     b.Property<long>("GuildId")