BirthdayBot/ApplicationCommands/ExportModule.cs

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C#
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using Discord.Interactions;
using System.Text;
namespace BirthdayBot.ApplicationCommands;
public class ExportModule : BotModuleBase {
public const string HelpCmdExport = "Generates a text file with all known and available birthdays.";
[SlashCommand("export-birthdays", HelpCmdExport)]
[DefaultMemberPermissions(GuildPermission.ManageGuild)]
[CommandContextType(InteractionContextType.Guild)]
public async Task CmdExport([Summary(description: "Specify whether to export the list in CSV format.")] bool asCsv = false) {
if (!await HasMemberCacheAsync(Context.Guild)) {
await RespondAsync(MemberCacheEmptyError, ephemeral: true);
return;
}
var bdlist = GetSortedUserList(Context.Guild);
var filename = "birthdaybot-" + Context.Guild.Id;
Stream fileoutput;
if (asCsv) {
fileoutput = ListExportCsv(Context.Guild, bdlist);
filename += ".csv";
} else {
fileoutput = ListExportNormal(Context.Guild, bdlist);
filename += ".txt.";
}
await RespondWithFileAsync(fileoutput, filename, text: $"Exported {bdlist.Count} birthdays to file.");
}
private static MemoryStream ListExportNormal(SocketGuild guild, IEnumerable<ListItem> list) {
// Output: "● Mon-dd: (user ID) Username [ - Nickname: (nickname)]"
var result = new MemoryStream();
var writer = new StreamWriter(result, Encoding.UTF8);
writer.WriteLine("Birthdays in " + guild.Name);
writer.WriteLine();
foreach (var item in list) {
var user = guild.GetUser(item.UserId);
if (user == null) continue; // User disappeared in the instant between getting list and processing
writer.Write($"● {Common.MonthNames[item.BirthMonth]}-{item.BirthDay:00}: ");
writer.Write(item.UserId);
writer.Write(" " + user.Username);
if (user.DiscriminatorValue != 0) writer.Write($"#{user.Discriminator}");
if (user.GlobalName != null) writer.Write($" ({user.GlobalName})");
if (user.Nickname != null) writer.Write(" - Nickname: " + user.Nickname);
if (item.TimeZone != null) writer.Write(" | Time zone: " + item.TimeZone);
writer.WriteLine();
}
writer.Flush();
result.Position = 0;
return result;
}
private static MemoryStream ListExportCsv(SocketGuild guild, IEnumerable<ListItem> list) {
// Output: User ID, Username, Nickname, Month-Day, Month, Day
var result = new MemoryStream();
var writer = new StreamWriter(result, Encoding.UTF8);
static string csvEscape(string input) {
var result = new StringBuilder();
result.Append('"');
foreach (var ch in input) {
if (ch == '"') result.Append('"');
result.Append(ch);
}
result.Append('"');
return result.ToString();
}
// Conforming to RFC 4180; with header
writer.Write("UserId,Username,DisplayName,Nickname,MonthDayDisp,Month,Day,TimeZone");
writer.Write("\r\n"); // crlf line break is specified by the standard
foreach (var item in list) {
var user = guild.GetUser(item.UserId);
if (user == null) continue; // User disappeared in the instant between getting list and processing
writer.Write(item.UserId);
writer.Write(',');
writer.Write(csvEscape(user.Username));
if (user.DiscriminatorValue != 0) writer.Write($"#{user.Discriminator}");
writer.Write(',');
if (user.GlobalName != null) writer.Write(csvEscape(user.GlobalName));
writer.Write(',');
if (user.Nickname != null) writer.Write(csvEscape(user.Nickname));
writer.Write(',');
writer.Write($"{Common.MonthNames[item.BirthMonth]}-{item.BirthDay:00}");
writer.Write(',');
writer.Write(item.BirthMonth);
writer.Write(',');
writer.Write(item.BirthDay);
writer.Write(',');
writer.Write(item.TimeZone);
writer.Write("\r\n");
}
writer.Flush();
result.Position = 0;
return result;
}
}