fix: [torrust#242] wrong infohash when info dict contains source field

When you define a "source" field value in the "info" dictionary inside
the torrent file the field changes the infohash value. We did not
save that field in the database and in the in-memory struct
`TorrentInfo` so the calculated infohash was wrong becuase this field
belongs to the `info` key.

migrations/mysql/20230803160604_torrust_torrents_add_source.sql

@@ -0,0 +1 @@
+ALTER TABLE torrust_torrents ADD COLUMN source TEXT DEFAULT NULL

migrations/sqlite3/20230803160604_torrust_torrents_add_source.sql

@@ -0,0 +1 @@
+ALTER TABLE torrust_torrents ADD COLUMN source TEXT DEFAULT NULL

src/databases/mysql.rs

@@ -441,7 +441,7 @@ impl Database for Mysql {
         let private = torrent.info.private.unwrap_or(0);
 
         // add torrent
-        let torrent_id = query("INSERT INTO torrust_torrents (uploader_id, category_id, info_hash, size, name, pieces, piece_length, private, root_hash, date_uploaded) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, UTC_TIMESTAMP())")
+        let torrent_id = query("INSERT INTO torrust_torrents (uploader_id, category_id, info_hash, size, name, pieces, piece_length, private, root_hash, `source`, date_uploaded) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, UTC_TIMESTAMP())")
             .bind(uploader_id)
             .bind(category_id)
             .bind(info_hash.to_lowercase())
@@ -451,6 +451,7 @@ impl Database for Mysql {
             .bind(torrent.info.piece_length)
             .bind(private)
             .bind(root_hash)
+            .bind(torrent.info.source.clone())
             .execute(&self.pool)
             .await
             .map(|v| i64::try_from(v.last_insert_id()).expect("last ID is larger than i64"))

src/databases/sqlite.rs

@@ -431,7 +431,7 @@ impl Database for Sqlite {
         let private = torrent.info.private.unwrap_or(0);
 
         // add torrent
-        let torrent_id = query("INSERT INTO torrust_torrents (uploader_id, category_id, info_hash, size, name, pieces, piece_length, private, root_hash, date_uploaded) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, strftime('%Y-%m-%d %H:%M:%S',DATETIME('now', 'utc')))")
+        let torrent_id = query("INSERT INTO torrust_torrents (uploader_id, category_id, info_hash, size, name, pieces, piece_length, private, root_hash, `source`, date_uploaded) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, strftime('%Y-%m-%d %H:%M:%S',DATETIME('now', 'utc')))")
             .bind(uploader_id)
             .bind(category_id)
             .bind(info_hash.to_lowercase())
@@ -441,6 +441,7 @@ impl Database for Sqlite {
             .bind(torrent.info.piece_length)
             .bind(private)
             .bind(root_hash)
+            .bind(torrent.info.source.clone())
             .execute(&self.pool)
             .await
             .map(|v| v.last_insert_rowid())

src/models/torrent_file.rs

@@ -38,6 +38,8 @@ pub struct TorrentInfo {
     #[serde(default)]
     #[serde(rename = "root hash")]
     pub root_hash: Option<String>,
+    #[serde(default)]
+    pub source: Option<String>,
 }
 
 impl TorrentInfo {
@@ -123,6 +125,7 @@ impl Torrent {
             private,
             path: None,
             root_hash: None,
+            source: None,
         };
 
         // a torrent file has a root hash or a pieces key, but not both.

src/services/torrent_file.rs

@@ -80,6 +80,7 @@ mod tests {
                 private: Some(0),
                 path: None,
                 root_hash: None,
+                source: None,
             },
             announce: None,
             announce_list: Some(vec![]),