From 40c4df0000dfdd6a0761a6133660944011dde22e Mon Sep 17 00:00:00 2001
From: Jose Celano <josecelano@gmail.com>
Date: Mon, 31 Jul 2023 16:36:30 +0100
Subject: [PATCH] refactor: extract hasher service

---
 src/services/hasher.rs       | 28 ++++++++++++++++++++++++++++
 src/services/mod.rs          |  1 +
 src/services/torrent_file.rs | 16 +---------------
 3 files changed, 30 insertions(+), 15 deletions(-)
 create mode 100644 src/services/hasher.rs

diff --git a/src/services/hasher.rs b/src/services/hasher.rs
new file mode 100644
index 00000000..3ee4f6e8
--- /dev/null
+++ b/src/services/hasher.rs
@@ -0,0 +1,28 @@
+//! Hashing service
+use sha1::{Digest, Sha1};
+
+// Calculate the sha1 hash of a string
+#[must_use]
+pub fn sha1(data: &str) -> String {
+    // Create a Sha1 object
+    let mut hasher = Sha1::new();
+
+    // Write input message
+    hasher.update(data.as_bytes());
+
+    // Read hash digest and consume hasher
+    let result = hasher.finalize();
+
+    // Convert the hash (a byte array) to a string of hex characters
+    hex::encode(result)
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::services::hasher::sha1;
+
+    #[test]
+    fn it_should_hash_an_string() {
+        assert_eq!(sha1("hello world"), "2aae6c35c94fcfb415dbe95f408b9ce91ee846ed");
+    }
+}
diff --git a/src/services/mod.rs b/src/services/mod.rs
index b19bab37..b2431aec 100644
--- a/src/services/mod.rs
+++ b/src/services/mod.rs
@@ -2,6 +2,7 @@
 pub mod about;
 pub mod authentication;
 pub mod category;
+pub mod hasher;
 pub mod proxy;
 pub mod settings;
 pub mod tag;
diff --git a/src/services/torrent_file.rs b/src/services/torrent_file.rs
index 9eb423c2..3d02951d 100644
--- a/src/services/torrent_file.rs
+++ b/src/services/torrent_file.rs
@@ -1,8 +1,8 @@
 //! This module contains the services related to torrent file management.
-use sha1::{Digest, Sha1};
 use uuid::Uuid;
 
 use crate::models::torrent_file::{Torrent, TorrentFile};
+use crate::services::hasher::sha1;
 
 pub struct NewTorrentInfoRequest {
     pub name: String,
@@ -48,17 +48,3 @@ pub fn generate_random_torrent(id: Uuid) -> Torrent {
 
     Torrent::from_new_torrent_info_request(torrent_info_request)
 }
-
-fn sha1(data: &str) -> String {
-    // Create a Sha1 object
-    let mut hasher = Sha1::new();
-
-    // Write input message
-    hasher.update(data.as_bytes());
-
-    // Read hash digest and consume hasher
-    let result = hasher.finalize();
-
-    // Convert the hash (a byte array) to a string of hex characters
-    hex::encode(result)
-}