feat: Implement data loading for books in CsvDataLoader

lesson_12/io/io_app/src/main/java/com/codedifferently/lesson12/factory/kevinmason/CsvDataLoader.java

@@ -0,0 +1,60 @@
+package com.codedifferently.lesson12.factory.kevinmason;
+
+import java.io.BufferedReader;
+import java.io.FileReader;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.UUID;
+
+import org.springframework.stereotype.Service;
+
+import com.codedifferently.lesson12.factory.LibraryDataLoader;
+import com.codedifferently.lesson12.models.LibraryDataModel;
+import com.codedifferently.lesson12.models.MediaItemModel;
+
+/**
+ * A concrete implementation of the LibraryDataLoader interface that loads data from CSV files in
+ * the app's resources/csv directory.
+ */
+@Service // Annotation for Spring to recognize this class as a service component
+public class CsvDataLoader implements LibraryDataLoader {
+
+ // CSV file path
+ private static final String CSV_FILE_PATH = "src/main/resources/csv/data.csv";
+
+ @Override
+ public LibraryDataModel loadData() throws IOException {
+ LibraryDataModel libraryDataModel = new LibraryDataModel();
+ libraryDataModel.mediaItems = loadMediaItemsFromCsv();
+ // Load other data if needed
+ return libraryDataModel;
+ }
+
+ // Method to load media items from CSV
+ private List<MediaItemModel> loadMediaItemsFromCsv() throws IOException {
+ List<MediaItemModel> mediaItems = new ArrayList<>();
+ try (BufferedReader br = new BufferedReader(new FileReader(CSV_FILE_PATH))) {
+ String line;
+ // Skip header line if present
+ br.readLine();
+ while ((line = br.readLine()) != null) {
+ String[] data = line.split(",");
+ MediaItemModel mediaItem = createMediaItemFromCsvData(data);
+ mediaItems.add(mediaItem);
+ }
+ }
+ return mediaItems;
+ }
+
+ // Method to create a MediaItemModel object from CSV data
+ private MediaItemModel createMediaItemFromCsvData(String[] data) {
+ MediaItemModel mediaItem = new MediaItemModel();
+ mediaItem.type = data[0];
+ mediaItem.id = UUID.fromString(data[1]);
+ mediaItem.title = data[2];
+ mediaItem.isbn = data[3];
+ // Set other attributes as needed
+ return mediaItem;
+ }
+}