Merge pull request 'feat(service): создан универсальный EntityService для операций CRUD (close #48)' (#57) from feature/entity-service into dev

Reviewed-on: #57

todo/src/main/java/ru/kamask/pet/todo/service/EntityService.java

@@ -0,0 +1,35 @@
+package ru.kamask.pet.todo.service;
+
+import java.util.List;
+import java.util.Optional;
+
+import ru.kamask.pet.todo.model.Identifiable;
+import ru.kamask.pet.todo.repo.Repository;
+
+public class EntityService<T extends Identifiable> {
+    private final Repository<T> repo;
+
+    protected EntityService(Repository<T> repo) {
+        this.repo = repo;
+    }
+
+    protected void save(T obj) {
+        repo.save(obj);
+    }
+
+    protected Optional<T> getById(int id) {
+        return repo.findById(id);
+    }
+
+    protected List<T> getAll() {
+        return repo.findAll();
+    }
+
+    protected void remove(int id) {
+        repo.delete(id);
+    }
+
+    protected boolean has(int id) {
+        return repo.has(id);
+    }
+}