[bencode] Change signatures

src/bencode.rs

@@ -4,24 +4,6 @@ use std::fmt::{Display, Formatter};
 use anyhow::{anyhow, ensure, Result};
 use sha1::{Digest, Sha1};
 
-/*struct FileInfo {
-    length: i64,
-    path: str,
-}
-
-struct TorrentInfo {
-    files: Option<Vec<FileInfo>>,
-    length: Option<i64>,
-    name: str,
-    piece_length: i64,
-    pieces: Vec<str>,
-}
-
-struct Torrent {
-    announce: str,
-    info: TorrentInfo,
-    extra: HashMap<str, str>
-}*/
 
 #[derive(Debug, PartialEq, Eq, Hash, Clone)]
 pub struct ByteString(Vec<u8>);
@@ -38,6 +20,10 @@ impl Display for ByteString {
 }
 
 impl ByteString {
+    pub fn to_string(&self) -> Result<String> {
+        let result = std::str::from_utf8(&self.0[..])?;
+        Ok(result.to_string())
+    }
     #[allow(dead_code)]
     pub fn from_str(input: &str) -> Self {
         ByteString(input.as_bytes().to_vec())
@@ -87,14 +73,14 @@ impl Display for Bencode {
 
 impl Bencode {
 
-    pub fn encode(input: &Self) -> Vec<u8> {
+    pub fn encode(&self) -> Vec<u8> {
-        match input {
+        match self {
             Bencode::Integer(i) => {format!("i{}e", i).as_bytes().to_vec()}
             Bencode::Bytes(b) => {[format!("{}:", b.0.len()).as_bytes(), &b.0[..]].concat()}
             Bencode::List(l) => {
                 let mut result = vec!['l' as u8];
                 for item in l {
-                    result.extend(Self::encode(item))
+                    result.extend(item.encode())
                 }
                 result.push('e' as u8);
                 result
@@ -103,7 +89,7 @@ impl Bencode {
                 let mut result = vec!['d' as u8];
                 for (k, v) in d {
                     result.extend(Self::encode(&Bencode::Bytes(k.clone())));
-                    result.extend(Self::encode(v));
+                    result.extend(v.encode());
                 }
                 result.push('e' as u8);
                 result
@@ -117,10 +103,10 @@ impl Bencode {
         Ok(result)
     }
 
-    pub fn sha1(input: &Self) -> [u8; 20] {
+    pub fn sha1(&self) -> [u8; 20] {
         let mut hasher = Sha1::new();
 
-        hasher.update(Self::encode(input));
+        hasher.update(self.encode());
 
         hasher.finalize().into()
     }
@@ -242,30 +228,30 @@ mod tests {
 
     #[test]
     fn test_sha1() {
-        assert_eq!(Bencode::sha1(&Bencode::Integer(42)), hex!("3ce69356df4222111c27b41cccf2164e6cced799"));
+        assert_eq!(Bencode::Integer(42).sha1(), hex!("3ce69356df4222111c27b41cccf2164e6cced799"));
-        assert_eq!(Bencode::sha1(&Bencode::Bytes(ByteString::from_str("foo"))), hex!("a8f4559a9623f25c4d5f1155f31a2604c55e1334"));
+        assert_eq!(Bencode::Bytes(ByteString::from_str("foo")).sha1(), hex!("a8f4559a9623f25c4d5f1155f31a2604c55e1334"));
     }
 
     #[test]
     fn test_encode_int() {
-        assert_eq!(Bencode::encode(&Bencode::Integer(42)), "i42e".as_bytes());
+        assert_eq!(Bencode::Integer(42).encode(), "i42e".as_bytes());
-        assert_eq!(Bencode::encode(&Bencode::Integer(17)), "i17e".as_bytes());
+        assert_eq!(Bencode::Integer(17).encode(), "i17e".as_bytes());
     }
 
     #[test]
     fn test_encode_bytes() {
-        assert_eq!(Bencode::encode(&Bencode::Bytes(ByteString::from_str("foo"))), "3:foo".as_bytes());
+        assert_eq!(Bencode::Bytes(ByteString::from_str("foo")).encode(), "3:foo".as_bytes());
-        assert_eq!(Bencode::encode(&Bencode::Bytes(ByteString::from_str("bar"))), "3:bar".as_bytes());
+        assert_eq!(Bencode::Bytes(ByteString::from_str("bar")).encode(), "3:bar".as_bytes());
     }
 
     #[test]
     fn test_encode_list() {
-        assert_eq!(Bencode::encode(&Bencode::List(vec![Bencode::Bytes(ByteString::from_str("foo")), Bencode::Integer(42)])), "l3:fooi42ee".as_bytes());
+        assert_eq!(Bencode::List(vec![Bencode::Bytes(ByteString::from_str("foo")), Bencode::Integer(42)]).encode(), "l3:fooi42ee".as_bytes());
     }
 
     #[test]
     fn test_encode_dict() {
-        assert_eq!(Bencode::encode(&Bencode::Dict(HashMap::from([(ByteString::from_str("foo"), Bencode::Integer(42))]))), "d3:fooi42ee".as_bytes());
+        assert_eq!(Bencode::Dict(HashMap::from([(ByteString::from_str("foo"), Bencode::Integer(42))])).encode(), "d3:fooi42ee".as_bytes());
     }
 
     #[test]