fix clippy warnings

.gitignore

@@ -1 +1,3 @@
 /target
+/.vscode
+.env

src/command.rs

@@ -1,14 +1,12 @@
 use std::hint::black_box;
-
 use anyhow::Error;
-
 use crate::Context;
 
-
-#[poise::command(slash_command, rename = "discord's command name", guild_only)]
+// NOTE!!! Make sure these names in quotes are lowercase!
+#[poise::command(slash_command, rename = "cmd_name", guild_only)]
 pub async fn example(
     ctx: Context<'_>,
-    #[description = "input description shown in discord"]
+    #[description = "cmd_desc"]
     input: String
 ) -> Result<(), Error> {
     // Do something...

src/main.rs

@@ -1,37 +1,15 @@
 use poise::serenity_prelude::{self as serenity, GatewayIntents};
-use dotenv;
 mod command;
 
 pub struct Data {} // User data, which is stored and accessible in all command invocations
 type Context<'a> = poise::Context<'a, Data, anyhow::Error>;
 
-const DISCORD_INTENTS: &'static str = "DISCORD_INTENTS";
-const DISCORD_TOKEN: &'static str = "DISCORD_TOKEN";
-const DISCORD_ID: &'static str = "DISCORD_ID";
-
 #[tokio::main]
 async fn main() {
-    // ======================================== READ ENV ======================================== 
-    dotenv::dotenv().ok();
-    let id: String = std::env::var(DISCORD_ID).expect(&format!("ERROR: Missing {DISCORD_ID}"));
-    let token: String = std::env::var(DISCORD_TOKEN).expect(&format!("ERROR: Missing {DISCORD_TOKEN}"));
-    let perm_env: String = std::env::var(DISCORD_INTENTS)
-        .unwrap_or_else(|msg| {
-            println!("DEBUG: what is: {msg}");
-            println!("ERROR: Missing {DISCORD_INTENTS}");
-            "0".to_string()
-        });
-    // parse into u64, then into GatewayIntents
-    let perm_u64 = perm_env.parse::<u64>().unwrap_or(0u64);
-    let intents: GatewayIntents = GatewayIntents::from_bits(perm_u64).unwrap_or(GatewayIntents::empty());
-    // Re-build into string, just incase it has changed
-    let perm_string = intents.bits().to_string();
-    // ======================================== ENV DONE ======================================== 
-     
+    let env = read_env();
     // Generate sick text like this: 
     // http://www.patorjk.com/software/taag/#p=testall&f=Graffiti&t=hello%20world
     println!(r#"
-
      /$$$$$$$$                                /$$             /$$                     /$$$$$$$              /$$    
     |__  $$__/                               | $$            | $$                    | $$__  $$            | $$    
        | $$  /$$$$$$  /$$$$$$/$$$$   /$$$$$$ | $$  /$$$$$$  /$$$$$$    /$$$$$$       | $$  \ $$  /$$$$$$  /$$$$$$  
@@ -47,15 +25,11 @@ async fn main() {
     Template Bot.
     Invite this bot with:
 
-    https://discord.com/api/oauth2/authorize?client_id={id}&permissions={perm_string}&scope=bot
-    
     "#);
-    
-    // Use bitlogic "OR" to combine different intents.
-    let intents =
-        intents |
-        GatewayIntents::non_privileged();
-
+    println!("https://discord.com/api/oauth2/authorize?client_id={}&permissions={}&scope=bot",
+        env.id,
+        env.intents.bits(),
+    );
 
     let framework = poise::Framework::builder()
         .options(poise::FrameworkOptions {
@@ -66,16 +40,92 @@ async fn main() {
         })
         // un-comment songbird from Cargo.toml first.
         //.client_settings(songbird::register)
-        .token(token)
-        .intents(intents)
+        .token(env.token)
+        .intents(env.intents)
         .setup(|ctx, _ready, framework| {
             Box::pin(async move {
                 poise::builtins::register_globally(ctx, &framework.options().commands).await?;
-
                 Ok(Data {})
             })
         });
-    
-    framework.build().await.unwrap().start().await.unwrap();
+    // Start the Bot.
+    // Collect all the errors into one variable, that way we can match it
+    // all at once.
+    let err: Result<(), serenity::Error> = match framework.build().await {
+        Ok(ok) => {
+            match ok.start().await {
+                Ok(_start) => Ok(()),
+                Err(err) => Err(err),
+            }
+        },
+        Err(err) => Err(err),
+    };
+
+    if let Err(error) = err {
+        match error {
+            serenity::Error::Gateway(e)=>{
+                match e {
+                    serenity::GatewayError::InvalidAuthentication => println!("ERROR: Authentication Invalid, check your bot token."),
+                    err_no_var=>println!("ERROR: {}",err_no_var.to_string()),
+                }
+            },
+            serenity::Error::Decode(_, _)           => println!("ERROR: Decode"),
+            serenity::Error::Format(_)              => println!("ERROR: Format"),
+            serenity::Error::Io(_)                  => println!("ERROR: IO"),
+            serenity::Error::Json(_)                => println!("ERROR: Json"),
+            serenity::Error::Model(_)               => println!("ERROR: Model"),
+            serenity::Error::ExceededLimit(_, _)    => println!("ERROR: ExceededLimit"),
+            serenity::Error::NotInRange(_, _, _, _) => println!("ERROR: NotInRange"),
+            serenity::Error::Other(_)               => println!("ERROR: Other"),
+            serenity::Error::Url(_)                 => println!("ERROR: Url"),
+            serenity::Error::Client(_)              => println!("ERROR: Client"),
+            serenity::Error::Collector(_)           => println!("ERROR: Collector"),
+            serenity::Error::Http(_)                => println!("ERROR: Http"),
+            serenity::Error::Tungstenite(_)         => println!("ERROR: Tungstenite"),
+            _ => todo!(),
+        }
+    }
 }
 
+struct BotEnv {
+    intents: GatewayIntents,
+    token: String,
+    id: String,
+}
+
+fn read_env() -> BotEnv {
+    const DISCORD_INTENTS: &str = "DISCORD_INTENTS";
+    const DISCORD_TOKEN: &str = "DISCORD_TOKEN";
+    const DISCORD_ID: &str = "DISCORD_ID";
+    dotenv::dotenv().ok();
+    // ==================== ID ===========================
+    let id: String = std::env::var(DISCORD_ID)
+        .unwrap_or_else(|_| {
+            println!(r#"
+WARN: Missing {DISCORD_ID}
+> This isn't really that problematic, just that the generated invite link won't work."#);
+            String::from("")
+        });
+    // ==================== Token ========================
+    let token: String = std::env::var(DISCORD_TOKEN)
+        .unwrap_or_else(|_| panic!("ERROR: Missing {DISCORD_TOKEN}"));
+    // ==================== Intents ======================
+    let intents_env: String = std::env::var(DISCORD_INTENTS)
+        .unwrap_or_else(|msg| {
+            println!("DEBUG: what is: {msg}");
+            println!("ERROR: Missing {DISCORD_INTENTS}");
+            "0".to_string()
+        });
+    // ==================== Parse Intents =================
+    // parse into u64, then into GatewayIntents
+    let intents_u64 = intents_env.parse::<u64>().unwrap_or(0u64);
+    let intents_truncated: GatewayIntents = GatewayIntents::from_bits_truncate(intents_u64);
+    if intents_truncated.bits() != intents_u64 {
+        println!("WARN: Intents integer got truncated from {} to {}!", intents_u64, intents_truncated.bits())
+    };
+    BotEnv {
+        intents: intents_truncated,
+        token,
+        id,
+    }
+}