refactor: minor change on source structure

src/modules/source/mod.rs

@@ -3,10 +3,12 @@ use rusqlite::Connection;
 #[derive(Clone, Debug)]
 pub struct Word(String, String);
 
-pub struct FileDatabase {}
+pub struct FileDatabase<'a> {
+    pub connection: &'a Connection,
+}
 
 pub trait WordSource {
-    fn find_by_word(&self, word: &str, connection: &Connection) -> Result<Vec<Word>, ()>;
+    fn find_by_word(&self, word: &str) -> Result<Vec<Word>, ()>;
     fn insert_word(&mut self, word: Word) -> Result<(), ()>;
     fn remove_word(&self, word: &str) -> Result<(), ()>;
     fn edit_word(&mut self, word: Word) -> Result<(), ()>;
@@ -20,9 +22,9 @@ fn fuzzy_compare(a: &str, b: &str) -> bool {
     false
 }
 
-impl WordSource for FileDatabase {
-    fn find_by_word(&self, word: &str, connection: &Connection) -> Result<Vec<Word>, ()> {
-        let statement = connection.prepare("select key, description from word");
+impl<'a> WordSource for FileDatabase<'a> {
+    fn find_by_word(&self, word: &str) -> Result<Vec<Word>, ()> {
+        let statement = self.connection.prepare("select key, description from word");
         let mut word_list: Vec<Word> = vec![];
 
         if let Ok(mut query) = statement {