Start to implement the save_all method.

backend/infrastructure/src/video/repository.rs

@@ -61,4 +61,31 @@ impl LibraryItemSqliteRepository {
             }
         )
     }
+
+    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 prepared_statement = database_connection
+            .prepare(
+                "INSERT INTO library_item (
+                id,
+                name,
+                type,
+            ) VALUES (?1, ?2, ?3);",
+            )
+            .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.");
+        Ok(())
+    }
 }