Implemented handling of extra keys

src/main.rs

@@ -27,7 +27,7 @@ struct Torrent {
     announce: String,
     info: TorrentInfo,
     info_hash: [u8; 20],
-    extra: HashMap<String, String>
+    _extra: HashMap<String, String>
 }
 
 impl Torrent {
@@ -77,7 +77,7 @@ impl Torrent {
             }
         } else if let Some(b_files) = info_dict.get(&ByteString::from_str("files")) {
             let Bencode::List(files_list) = b_files else {
-                return Err(anyhow!("files not an list"))
+                return Err(anyhow!("files not a list"))
             };
 
             let mut files = Vec::new();
@@ -124,12 +124,38 @@ impl Torrent {
         let Bencode::Bytes(announce) = b_announce else {
             return Err(anyhow!("announce not a string"))
         };
+
+        let mut _extra = HashMap::new();
+        for (k, v) in decoded {
+            if k == &ByteString::from_str("announce") || k == &ByteString::from_str("info") {
+                continue
+            }
+            let Ok(k_str) = k.to_string() else {
+                println!("Ignoring non-UTF-8 key {k:?}");
+                continue;
+            };
+            match v {
+                Bencode::Integer(i) => {
+                    _extra.insert(k_str, format!("{}", i));
+                }
+                Bencode::Bytes(s) => {
+                    let Ok(s_str) = s.to_string() else {
+                        println!("Ignoring non-UTF-8 value of key {k_str}");
+                        continue;
+                    };
+                    _extra.insert(k_str, s_str);
+                }
+                _ => {
+                    println!("Ignoring extra of type list or dict")
+                }
+            }
+        }
+
         let result = Self {
             announce: announce.to_string()?,
             info_hash: b_info.sha1(),
             info,
-            // TODO
-            extra: HashMap::new(),
+            _extra,
         };
         Ok(result)
     }