large refactor: reorganize code

src/commands/gambling/give.rs

@@ -0,0 +1,29 @@
+use crate::{Context, Error};
+use super::get_user_wealth_mut;
+use poise::serenity_prelude as serenity;
+
+#[poise::command(slash_command, prefix_command)]
+pub async fn give(ctx: Context<'_>, user: serenity::User, amount: usize) -> Result<(), Error> {
+    if user.bot {
+        ctx.reply("Don't waste your token(s) by giving them to a bot!").await?;
+        return Ok(());
+    }
+
+    let mut users = ctx.data().users.lock().await;
+    let author_wealth = get_user_wealth_mut(&mut users, ctx.author().id);
+
+    if *author_wealth < amount {
+        ctx.reply(format!("You only have **{}** token(s) and cannot give away **{}**.",
+                          *author_wealth, amount)).await?;
+        return Ok(());
+    }
+
+    *author_wealth -= amount;
+
+    let receiver_wealth = get_user_wealth_mut(&mut users, user.id);
+    *receiver_wealth += amount;
+
+    ctx.reply(format!("You've given **{}** **{}** token(s).", user.name, amount)).await?;
+
+    Ok(())
+}