Code reorganized.

src/main.rs

@@ -1,6 +1,6 @@
 mod pocketbook;
 
-use rusqlite::{named_params, Connection, Result, NO_PARAMS};
+use rusqlite::{named_params, Connection, Result, Transaction, NO_PARAMS};
 use std::error::Error;
 use std::fs::File;
 use std::io::BufReader;
@@ -111,12 +111,9 @@ struct BookEntry {
     filepath: String,
 }
 
-fn main() {
+fn fix_firstauthor(tx: &Transaction) -> i32 {
     let mut authors_fixed = 0;
 
-    let mut conn = Connection::open("/mnt/ext1/system/explorer-3/explorer-3.db").unwrap();
-    let tx = conn.transaction().unwrap();
-    {
     // Get book ids from entries where we have something like "firstname lastname" in author
     // but no "lastname, firstname" in fistauthor
     // Get also book ids from the special case where we have multiple authors (separated by ", " in authors)
@@ -171,7 +168,15 @@ fn main() {
             }
         }
     }
-    }
+
+    authors_fixed
+}
+
+fn main() {
+    let mut conn = Connection::open("/mnt/ext1/system/explorer-3/explorer-3.db").unwrap();
+
+    let tx = conn.transaction().unwrap();
+    let authors_fixed = fix_firstauthor(&tx);
     tx.commit().unwrap();
 
     if cfg!(target_arch = "arm") {