SupportChild/Commands/SayCommand.cs

using DSharpPlus.Entities;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using DSharpPlus.SlashCommands;
using DSharpPlus.SlashCommands.Attributes;

namespace SupportChild.Commands;

public class SayCommand : ApplicationCommandModule
{
	[SlashRequireGuild]
	[SlashCommand("say", "Prints a message with information from staff. Use without identifier to list all identifiers.")]
	public async Task OnExecute(InteractionContext command, [Option("Identifier", "(Optional) The identifier word to summon a message.")] string identifier = null)
	{
		// Print list of all messages if no identifier is provided
		if (identifier == null)
		{
			List<Database.Message> messages = Database.GetAllMessages();
			if (!messages.Any())
			{
				await command.CreateResponseAsync(new DiscordEmbedBuilder
				{
					Color = DiscordColor.Red,
					Description = "There are no messages registered."
				}, true);
				return;
			}

			List<string> listItems = new List<string>();
			foreach (Database.Message message in messages)
			{
				listItems.Add("**" + message.identifier + "** Added by <@" + message.userID + ">\n");
			}

			LinkedList<string> listMessages = Utilities.ParseListIntoMessages(listItems);
			foreach (string listMessage in listMessages)
			{
				await command.CreateResponseAsync(new DiscordEmbedBuilder
				{
					Title = "Available messages: ",
					Color = DiscordColor.Green,
					Description = listMessage
				}, true);
			}
		}
		// Print specific message
		else
		{
			if (!Database.TryGetMessage(identifier.ToLower(), out Database.Message message))
			{
				await command.CreateResponseAsync(new DiscordEmbedBuilder
				{
					Color = DiscordColor.Red,
					Description = "There is no message with that identifier."
				}, true);
				return;
			}

			await command.CreateResponseAsync(new DiscordEmbedBuilder
			{
				Color = DiscordColor.Cyan,
				Description = message.message.Replace("\\n", "\n")
			});
		}
	}
}