From a916cf0e33ed0e40eb32501508d3b0ca7d6bd87d Mon Sep 17 00:00:00 2001
From: Stefano Pigozzi <me@steffo.eu>
Date: Mon, 8 Jul 2024 04:28:51 +0200
Subject: [PATCH] Add `/help` command

---
 src/telegram/commands/help.rs | 21 +++++++++++++++++++++
 src/telegram/commands/mod.rs  |  6 +++++-
 2 files changed, 26 insertions(+), 1 deletion(-)
 create mode 100644 src/telegram/commands/help.rs

diff --git a/src/telegram/commands/help.rs b/src/telegram/commands/help.rs
new file mode 100644
index 00000000..95b6268d
--- /dev/null
+++ b/src/telegram/commands/help.rs
@@ -0,0 +1,21 @@
+use anyhow::Context;
+use teloxide::Bot;
+use teloxide::payloads::SendMessageSetters;
+use teloxide::requests::Requester;
+use teloxide::types::{Message};
+use teloxide::utils::command::BotCommands;
+use super::{CommandResult};
+
+pub async fn handler(bot: Bot, message: Message) -> CommandResult {
+	let descriptions = super::Command::descriptions().to_string();
+
+	let text = format!("❓ Sono disponibili i seguenti comandi:\n\n{descriptions}");
+
+	let _reply = bot
+		.send_message(message.chat.id, text)
+		.reply_to_message_id(message.id)
+		.await
+		.context("Failed to send message")?;
+
+	Ok(())
+}
diff --git a/src/telegram/commands/mod.rs b/src/telegram/commands/mod.rs
index 7ee35f8d..d9350a5d 100644
--- a/src/telegram/commands/mod.rs
+++ b/src/telegram/commands/mod.rs
@@ -13,12 +13,15 @@ use teloxide::utils::command::BotCommands;
 mod start;
 mod fortune;
 mod echo;
+mod help;
 
 #[derive(Debug, Clone, BotCommands)]
 #[command(rename_rule = "lowercase")]
-enum Command {
+pub(self) enum Command {
 	#[command(description = "Invia messaggio di introduzione.")]
 	Start,
+	#[command(description = "Visualizza l'elenco dei comandi disponibili.")]
+	Help,
 	#[command(description = "Mostra il tuo oroscopo di oggi.")]
 	Fortune,
 	#[command(description = "Ripeti il testo inviato.")]
@@ -30,6 +33,7 @@ async fn handle_command(bot: Bot, command: Command, message: Message) -> Command
 
 	match command {
 		Command::Start => start::handler(bot, message).await,
+		Command::Help => help::handler(bot, message).await,
 		Command::Fortune => fortune::handler(bot, message).await,
 		Command::Echo(text) => echo::handler(bot, message, text).await,
 	}