Implement the save_all method.

backend/infrastructure/src/video/repository.rs

@@ -62,30 +62,27 @@ impl LibraryItemSqliteRepository {
         )
     }
 
-    fn save_all(&self, entities: Vec<LibraryItemEntity>) -> Result<(), Error> {
+    pub fn save_all(&self, entities: Vec<LibraryItemEntity>) -> Result<(), Error> {
         let database_connection = self.get_connection();
 
-        /*
-        Expected query if there is one single item in "entities":
-        INSERT INTO library_item (id, name, type) VALUES (?1, ?2, ?3);
-
-        Expected query if there are two items in "entities":
-        INSERT INTO library_item (id, name, type) VALUES (?1, ?2, ?3), ($4, $5, $6);
-         */
+        let mut query = String::from("INSERT INTO library_item (id, name, type) VALUES ");
+        let mut params: Vec<rusqlite::types::Value> = Vec::new();
+        
+        for (i, entity) in entities.iter().enumerate() {
+            if i > 0 {
+                query.push_str(", ");
+            }
+            query.push_str(&format!("(${}, ${}, ${})", i * 3 + 1, i * 3 + 2, i * 3 + 3));
+            params.push(entity.id.to_string().into());
+            params.push(entity.name.clone().into());
+            params.push(entity.r#type.into());
+        }
+        
         let mut prepared_statement = database_connection
-            .prepare(
-                "INSERT INTO library_item (
-                id,
-                name,
-                type,
-            ) VALUES (?1, ?2, ?3);",
-            )
+            .prepare(&query)
             .expect("Unable to prepare statement for user saving…");
-        prepared_statement.execute(rusqlite::params![
-            entity.id.to_string(),
-            entity.name,
-            entity.r#type
-        ]).expect("Unable to insert the library items.");
+        
+        prepared_statement.execute(rusqlite::params_from_iter(params))?;
         Ok(())
     }
 }