X-Git-Url: https://git.mdrn.pl/wl-app.git/blobdiff_plain/48b2fe9f7c2dc3d9aeaaa6dbfb27c7da4f3235ff..269195b3729c1bdc22e9053ee4ebca667ea8549d:/Android/app/src/main/java/com/moiseum/wolnelektury/view/news/NewsListPresenter.java

diff --git a/Android/app/src/main/java/com/moiseum/wolnelektury/view/news/NewsListPresenter.java b/Android/app/src/main/java/com/moiseum/wolnelektury/view/news/NewsListPresenter.java
new file mode 100644
index 0000000..4b87b96
--- /dev/null
+++ b/Android/app/src/main/java/com/moiseum/wolnelektury/view/news/NewsListPresenter.java
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+package com.moiseum.wolnelektury.view.news;
+
+import android.os.Bundle;
+
+import com.moiseum.wolnelektury.base.DataObserver;
+import com.moiseum.wolnelektury.base.DataProvider;
+import com.moiseum.wolnelektury.base.mvp.FragmentPresenter;
+import com.moiseum.wolnelektury.connection.RestClient;
+import com.moiseum.wolnelektury.connection.models.NewsModel;
+import com.moiseum.wolnelektury.connection.services.NewsService;
+
+import java.util.Collections;
+import java.util.List;
+
+import retrofit2.Call;
+
+/**
+ * Created by Piotr Ostrowski on 06.08.2018.
+ */
+class NewsListPresenter extends FragmentPresenter<NewsListView> {
+
+	private class NewsListDataProvider extends DataProvider<List<NewsModel>, NewsService> {
+
+		@Override
+		protected Class<NewsService> getServiceClass() {
+			return NewsService.class;
+		}
+
+		@Override
+		public Call<List<NewsModel>> execute(NewsService service) {
+			return service.getNews(lastKeySlug, RestClient.PAGINATION_LIMIT);
+		}
+	}
+
+	private class NewsListDataObserver implements DataObserver<List<NewsModel>> {
+
+		@Override
+		public void onLoadStarted() {
+			getView().setProgressVisible(true);
+		}
+
+		@Override
+		public void onLoadSuccess(List<NewsModel> data) {
+			if (data.size() > 0) {
+				lastKey = data.get(data.size() - 1).getKey();
+			}
+			getView().setProgressVisible(false);
+			getView().setData(data);
+		}
+
+		@Override
+		public void onLoadFailed(Exception e) {
+			getView().setProgressVisible(false);
+			getView().setData(Collections.emptyList());
+			getView().showError(e);
+		}
+	}
+
+	private NewsListDataProvider dataProvider;
+	private String lastKey = null;
+
+	NewsListPresenter(NewsListView view) {
+		super(view);
+		dataProvider = new NewsListDataProvider();
+		dataProvider.setDataObserver(new NewsListDataObserver());
+	}
+
+	@Override
+	public void onViewCreated(Bundle savedInstanceState) {
+		super.onViewCreated(savedInstanceState);
+		dataProvider.load(null);
+	}
+
+	public void loadMoreNews() {
+		dataProvider.load(lastKey);
+	}
+
+	public void onNewsClicked(NewsModel newsModel) {
+		getView().launchNews(newsModel);
+	}
+}