From fe476404b4ce134c946d1754d2652461340c1186 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Anton=20Luka=20=C5=A0ijanec?= <anton@sijanec.eu>
Date: Tue, 6 Feb 2024 17:27:02 +0100
Subject: patcjh

---
 rust/src/main.rs | 95 +++++++++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 87 insertions(+), 8 deletions(-)

(limited to 'rust/src/main.rs')

diff --git a/rust/src/main.rs b/rust/src/main.rs
index 64fa16c..adb656c 100644
--- a/rust/src/main.rs
+++ b/rust/src/main.rs
@@ -1,11 +1,17 @@
 extern crate hex;
 extern crate urlencoding;
+extern crate bencode;
 
 use std::collections::HashMap;
 use std::net::IpAddr;
-use chrono::{DateTime, Utc};
+use chrono::{DateTime, Utc, TimeZone};
 use sha2::{Sha256, Digest};
 use sha1::{Sha1};
+use bencode::{Bencode, FromBencode};
+use bencode::util::ByteString;
+use std::str;
+use std::net::SocketAddr;
+
 enum Version {
 	V1,
 	V2,
@@ -17,10 +23,25 @@ struct Torrent {
 	sha256: [u8; 32],
 	version: Version,
 	files: HashMap<String, u64>,
-	source: IpAddr,
-	date: DateTime<Utc>,
-	hostname: String,
-	software: String
+	source: Option<SocketAddr>,
+	date: Option<DateTime<Utc>>,
+	hostname: Option<String>,
+	software: Option<String>
+}
+impl Default for Torrent {
+	fn default() -> Torrent {
+		Torrent {
+			name: String::from("travnik_default_name_unset"),
+			sha1: [0; 20],
+			sha256: [0; 32],
+			version: Version::V1,
+			files: HashMap::new(),
+			source: None,
+			date: None,
+			hostname: None,
+			software: None
+		}
+	}
 }
 impl Torrent {
 	fn magnet(&self) -> String {
@@ -37,8 +58,66 @@ impl Torrent {
 		string
 	}
 }
+fn sockaddr_from_source(string) -> Result<SockAddra> // TODO nadaljuj
+#[derive(Debug)]
+enum TorrentDecodeError {
+	NotADict,
+	NoName,
+	NoLength,
+	CreatedByNotUtf8,
+	SoftwareNotUtf8
+}
+impl FromBencode for Torrent {
+	type Err = TorrentDecodeError;
+	fn from_bencode(bencode: &Bencode) -> Result<Torrent, TorrentDecodeError> {
+		let metainfo = match bencode {
+			&Bencode::Dict(ref metainfo) => metainfo,
+			_ => return Err(TorrentDecodeError::NotADict)
+		};
+		let torrent = Torrent {
+			date: match metainfo.get(&ByteString::from_str("creation date")) {
+					Some(&Bencode::Number(c)) => Some(Utc.timestamp(c, 0)),
+					_ => None
+			},
+			hostname: match metainfo.get(&ByteString::from_str("created by")) {
+				Some(&Bencode::ByteString(ref s)) => match str::from_utf8(&s) {
+					Ok(v) => Some(match v.split(" ").nth(3) {
+						Some(c) => String::from(c),
+						None => String::from("b")
+					}),
+					Err(_) => return Err(TorrentDecodeError::CreatedByNotUtf8)
+				},
+				_ => None
+			},
+			software: match metainfo.get(&ByteString::from_str("source")) {
+				Some(&Bencode::Dict(ref s)) => match s.get(&ByteString::from_str("v")) {
+					Some(&Bencode::ByteString(ref s)) => match String::from_utf8(s.to_vec()) {
+						Ok(v) => Some(v),
+						Err(_) => return Err(TorrentDecodeError::SoftwareNotUtf8)
+					},
+					_ => None
+				},
+				_ => None
+			},
+			source: match metainfo.get(&ByteString::from_str("source")) {
+				Some(&Bencode::Dict(ref s)) => match s.get(&ByteString::from_str("ip")) {
+					Some(&Bencode::ByteString(ref s)) => match str::from_utf8(&s) {
+						Ok(v) => Some(sockaddr_from_source(v)?), // TODO nadaljuj
+						Err(_) => return Err(Torrent)
+					},
+					_ => None
+				},
+				_ => None
+			},
+			..Default::default()
+		};
+		Ok(torrent)
+	}
+}
 fn main() {
-	let hash2 = Sha256::new().chain_update(b"test").finalize();
-	let hash1 = Sha1::new().chain_update(b"test").finalize();
-	println!("Hello, world! {:#?} {:#?}", hash2, hash1);
+	// let hash2 = Sha256::new().chain_update(b"test").finalize();
+	// let hash1 = Sha1::new().chain_update(b"test").finalize();
+	// println!("Hello, world! {:#?} {:#?}", hash2, hash1);
+	let bencode: bencode::Bencode = bencode::from_vec(String::from("d1:wlee").as_bytes().to_vec()).unwrap();
+	println!("{:#?}", bencode);
 }
-- 
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