From 044d3de4981af84a7e6caab2d79ac273f77d7124 Mon Sep 17 00:00:00 2001
From: Bryan Newbold <bnewbold@robocracy.org>
Date: Thu, 7 Dec 2017 23:27:41 -0800
Subject: parse_dat_address() helper

---
 src/bin/geniza-net.rs | 28 ++++++----------------------
 src/lib.rs            | 43 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 49 insertions(+), 22 deletions(-)

diff --git a/src/bin/geniza-net.rs b/src/bin/geniza-net.rs
index 6d38eae..0c82e6d 100644
--- a/src/bin/geniza-net.rs
+++ b/src/bin/geniza-net.rs
@@ -12,22 +12,6 @@ use geniza::*;
 use std::path::Path;
 use clap::{App, SubCommand, Arg};
 
-fn parse_dat_key(raw_key: &str) -> Result<Vec<u8>> {
-
-    if raw_key.len() != 32 * 2 {
-        bail!("dat key not correct length");
-    }
-    let mut key_bytes = vec![];
-    for i in 0..32 {
-        let r = u8::from_str_radix(&raw_key[2 * i..2 * i + 2], 16);
-        match r {
-            Ok(b) => key_bytes.push(b),
-            Err(e) => bail!("Problem with hex: {}", e),
-        };
-    }
-    Ok(key_bytes)
-}
-
 fn run() -> Result<()> {
     env_logger::init().unwrap();
 
@@ -81,7 +65,7 @@ fn run() -> Result<()> {
         ("connect", Some(subm)) => {
             let host_port = subm.value_of("host_port").unwrap();
             let dat_key = subm.value_of("dat_key").unwrap();
-            let key_bytes = parse_dat_key(&dat_key)?;
+            let key_bytes = parse_dat_address(&dat_key)?;
             DatConnection::connect(host_port, &key_bytes, false)?;
             println!("Done!");
         }
@@ -89,7 +73,7 @@ fn run() -> Result<()> {
             let host_port = subm.value_of("host_port").unwrap();
             let dat_key = subm.value_of("dat_key").unwrap();
             let count: u64 = subm.value_of("count").unwrap().parse().unwrap();
-            let key_bytes = parse_dat_key(&dat_key)?;
+            let key_bytes = parse_dat_address(&dat_key)?;
             let mut dc = DatConnection::connect(host_port, &key_bytes, false)?;
             dc.receive_some(false, count)?;
             dc.receive_some(true, count)?;
@@ -97,7 +81,7 @@ fn run() -> Result<()> {
         }
         ("discovery-key", Some(subm)) => {
             let dat_key = subm.value_of("dat_key").unwrap();
-            let key_bytes = parse_dat_key(&dat_key)?;
+            let key_bytes = parse_dat_address(&dat_key)?;
             let disc_key = make_discovery_key(&key_bytes);
             for b in disc_key {
                 print!("{:02x}", b);
@@ -106,7 +90,7 @@ fn run() -> Result<()> {
         }
         ("discovery-dns-name", Some(subm)) => {
             let dat_key = subm.value_of("dat_key").unwrap();
-            let key_bytes = parse_dat_key(&dat_key)?;
+            let key_bytes = parse_dat_address(&dat_key)?;
             let disc_key = make_discovery_key(&key_bytes);
             for b in 0..20 {
                 print!("{:02x}", disc_key[b]);
@@ -115,7 +99,7 @@ fn run() -> Result<()> {
         }
         ("discover-dns", Some(subm)) => {
             let dat_key = subm.value_of("dat_key").unwrap();
-            let key_bytes = parse_dat_key(&dat_key)?;
+            let key_bytes = parse_dat_address(&dat_key)?;
             let peers = discover_peers_dns(&key_bytes)?;
             if peers.len() == 0 {
                 println!("No peers found!");
@@ -128,7 +112,7 @@ fn run() -> Result<()> {
         ("naive-clone", Some(subm)) => {
             let host_port = subm.value_of("host_port").unwrap();
             let dat_key = subm.value_of("dat_key").unwrap();
-            let key_bytes = parse_dat_key(&dat_key)?;
+            let key_bytes = parse_dat_address(&dat_key)?;
             let dir = Path::new(subm.value_of("dat-dir").unwrap());
             let mut metadata = SleepDirRegister::create(&dir, "metadata")?;
             node_simple_clone(host_port, &key_bytes, &mut metadata, false)?;
diff --git a/src/lib.rs b/src/lib.rs
index bc62d78..63000f7 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -78,3 +78,46 @@ pub fn make_discovery_key(key: &[u8]) -> Vec<u8> {
     discovery_key.to_vec()
 }
 
+/// Helper to parse a dat address (aka, public key) in string format.
+///
+/// Address can start with 'dat://'. It should contain 64 hexadecimal characters.
+pub fn parse_dat_address(input: &str) -> Result<Vec<u8>> {
+
+    let raw_key = if input.starts_with("dat://") {
+        &input[6..]
+    } else {
+        input
+    };
+    if raw_key.len() != 32 * 2 {
+        bail!("dat key not correct length");
+    }
+    let mut key_bytes = vec![];
+    for i in 0..32 {
+        let r = u8::from_str_radix(&raw_key[2 * i..2 * i + 2], 16);
+        match r {
+            Ok(b) => key_bytes.push(b),
+            Err(e) => bail!("Problem with hex: {}", e),
+        };
+    }
+    Ok(key_bytes)
+}
+
+#[test]
+fn test_parse_dat_address() {
+
+    assert!(parse_dat_address(
+        "c7638882870abd4044d6467b0738f15e3a36f57c3a7f7f3417fd7e4e0841d597").is_ok());
+    assert!(parse_dat_address(
+        "C7638882870ABD4044D6467B0738F15E3A36F57C3A7F7F3417FD7E4E0841D597").is_ok());
+    assert!(parse_dat_address(
+        "dat://c7638882870abd4044d6467b0738f15e3a36f57c3a7f7f3417fd7e4e0841d597").is_ok());
+
+    assert!(parse_dat_address(
+        "c7638882870ab").is_err());
+    assert!(parse_dat_address(
+        "g7638882870abd4044d6467b0738f15e3a36f57c3a7f7f3417fd7e4e0841d597").is_err());
+    assert!(parse_dat_address(
+        "dat://c7638882870abd4044d6467b0738f15e3a36f57c3a7f7f3417fd7e4e0841d5970").is_err());
+    assert!(parse_dat_address(
+        "dat://c7638882870abd4044d6467b0738f15e3a36f57c3a7f7f3417fd7e4e0841d59").is_err());
+}
-- 
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