ScheduleController::findAllNext

src/main/java/de/ph87/homeautomation/schedule/ScheduleController.java

@@ -1,11 +1,16 @@
 package de.ph87.homeautomation.schedule;
 
+import de.ph87.homeautomation.schedule.entry.ScheduleEntry;
 import lombok.RequiredArgsConstructor;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
+import java.time.ZonedDateTime;
+import java.util.Comparator;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Optional;
 import java.util.stream.Collectors;
 
 @RestController
@@ -20,4 +25,37 @@ public class ScheduleController {
     return scheduleRepository.findAll().stream().map(ScheduleDto::new).collect(Collectors.toList());
   }
 
+  @GetMapping("findAllNext")
+  public List<ScheduleEntryNextDto> findAllNext() {
+    final ZonedDateTime now = ZonedDateTime.now();
+    return scheduleRepository.findAll().stream()
+      .map(schedule -> ScheduleEntryNextDto.create(schedule, now))
+      .filter(Optional::isPresent)
+      .map(Optional::get)
+      .collect(Collectors.toList());
+  }
+
+  static class ScheduleEntryNextDto {
+
+    public final String name;
+
+    public final ZonedDateTime nextTimestamp;
+
+    public final HashMap<String, String> properties;
+
+    private ScheduleEntryNextDto(final Schedule schedule, final ScheduleEntry entry) {
+      this.name = schedule.getName();
+      this.nextTimestamp = entry.getNextDateTime();
+      this.properties = new HashMap<>(entry.getProperties());
+    }
+
+    public static Optional<ScheduleEntryNextDto> create(final Schedule schedule, final ZonedDateTime now) {
+      return schedule.getEntries().stream()
+        .filter(entry -> entry.getNextDateTime() != null && entry.getNextDateTime().isAfter(now))
+        .min(Comparator.comparing(ScheduleEntry::getNextDateTime))
+        .map(scheduleEntry -> new ScheduleEntryNextDto(schedule, scheduleEntry));
+    }
+
+  }
+
 }