Add manpage queries

src/commands/man.rs

@@ -0,0 +1,21 @@
+use crate::commands::*;
+use reqwest::StatusCode;
+use serenity::model::channel::Message;
+use serenity::model::id::ChannelId;
+
+pub fn query_man(ctx: Context, msg: Message, args: Vec<&str>) {
+    let url = format!("https://linux.die.net/man/1/{}/", args[0]);
+    let response = reqwest::get(&url);
+    if response.is_err() {
+        send_not_found(msg.channel_id, &ctx);
+        return;
+    }
+    match response.unwrap().status() {
+        StatusCode::OK => send(msg.channel_id, &url, &ctx),
+        _ => send_not_found(msg.channel_id, &ctx),
+    }
+}
+
+fn send_not_found(target: ChannelId, ctx: &Context) {
+    send(target, "No such manpage", ctx);
+}

src/commands/mod.rs

@@ -10,6 +10,7 @@ mod nix;
 mod pacman;
 mod aur;
 mod xbps;
+mod man;
 extern crate reqwest;
 
 pub struct Handler;
@@ -75,6 +76,7 @@ lazy_static! {
         command_list.push(Command::new("dnf", dnf::query_dnf));
         command_list.push(Command::new("aur", aur::query_aur));
         command_list.push(Command::new("xbps", xbps::query_xbps));
+        command_list.push(Command::new("man", man::query_man));
         command_list.push(Command::new("pacbot help", help));
         command_list.push(Command::new("pb help", help));
         command_list