🚧 modify conference service to produce sample data

Signed-off-by: Marcus Fihlon <[email protected]>

src/main/java/swiss/fihlon/apus/service/ConferenceService.java

@@ -18,14 +18,47 @@
 package swiss.fihlon.apus.service;
 
 import org.springframework.stereotype.Service;
+import swiss.fihlon.apus.conference.Session;
 
-import java.io.Serial;
-import java.io.Serializable;
+import java.time.LocalDateTime;
+import java.time.temporal.ChronoUnit;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.UUID;
 
 @Service
-public class ConferenceService implements Serializable {
+public final class ConferenceService {
 
-    @Serial
-    private static final long serialVersionUID = -5273205444017934528L;
+    private final List<Session> sessions;
+
+    public ConferenceService() {
+        sessions = new ArrayList<>(100);
+
+        for (int counter = 0; counter < 100; counter++) {
+            final String id = UUID.randomUUID().toString();
+            final LocalDateTime startDate = LocalDateTime.now()
+                    .plusMinutes(Math.round(counter / 3f + 0.5f)) // 3 sessions start each minute
+                    .truncatedTo(ChronoUnit.SECONDS)
+                    .withSecond(0);
+            final LocalDateTime endDate = startDate.plusMinutes(1);
+            final String title = "Test Session #" + counter;
+            final String speaker = "Speaker #" + counter;
+            sessions.add(new Session(id, startDate, endDate, title, speaker));
+        }
+    }
+
+    public List<Session> getRunningSessions() {
+        final LocalDateTime now = LocalDateTime.now();
+        return sessions.stream()
+                .filter(session -> session.startDate().isBefore(now) && session.endDate().isAfter(now))
+                .toList();
+    }
+
+    public List<Session> getFutureSessions() {
+        final LocalDateTime now = LocalDateTime.now();
+        return sessions.stream()
+                .filter(session -> session.startDate().isAfter(now))
+                .toList();
+    }
 
 }

src/test/java/swiss/fihlon/apus/service/ConferenceServiceTest.java

@@ -0,0 +1,35 @@
+/*
+ * Apus - A social wall for conferences with additional features.
+ * Copyright (C) Marcus Fihlon and the individual contributors to Apus.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package swiss.fihlon.apus.service;
+
+import org.junit.jupiter.api.Test;
+import swiss.fihlon.apus.conference.Session;
+
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class ConferenceServiceTest {
+
+    @Test
+    void getSessions() {
+        final ConferenceService conferenceService = new ConferenceService();
+        final List<Session> sessions = conferenceService.getFutureSessions();
+        assertEquals(100, sessions.size());
+    }
+}