add possibility to get expenses by date and month

src/main/java/com/faf223/expensetrackerfaf/service/IncomeService.java

@@ -1,6 +1,7 @@
 package com.faf223.expensetrackerfaf.service;
 
 import com.faf223.expensetrackerfaf.model.Credential;
+import com.faf223.expensetrackerfaf.model.Expense;
 import com.faf223.expensetrackerfaf.model.IMoneyTransaction;
 import com.faf223.expensetrackerfaf.model.Income;
 import com.faf223.expensetrackerfaf.repository.CredentialRepository;
@@ -8,6 +9,8 @@ import com.faf223.expensetrackerfaf.repository.IncomeRepository;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 
+import java.time.LocalDate;
+import java.time.Month;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Optional;
@@ -37,6 +40,20 @@ public class IncomeService implements ITransactionService {
         return new ArrayList<>();
     }
 
+    @Override
+    public List<Income> getTransactionsByDate(LocalDate date) {
+        return incomeRepository.findByDate(date);
+    }
+
+    // TODO: store transaction month in a separate field in the DB and change this logic
+    @Override
+    public List<Income> getTransactionsByMonth(Month month) {
+        LocalDate startOfMonth = LocalDate.of(LocalDate.now().getYear(), month, 1);
+        LocalDate endOfMonth = startOfMonth.plusMonths(1).minusDays(1);
+
+        return incomeRepository.findByDateBetween(startOfMonth, endOfMonth);
+    }
+
     public Income getTransactionById(long id) {
         return incomeRepository.findById(id).orElse(null);
     }