package com.encora;
// Uncomment this for using a database instead.
//public interface ToDosRepository extends JpaRepository<ToDos, Integer>{
//}
import org.springframework.data.domain.Example;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.repository.query.FluentQuery;
import java.util.*;
import java.util.function.Function;
import java.util.stream.Collectors;
public class ToDosRepository implements JpaRepository<ToDos, Integer> {
Integer lastId;
List<ToDos> todos;
String currentSorting;
List<ToDos> filteredToDos;
List<String> currentFilters;
// Constructor
public ToDosRepository() {
this.lastId = 0;
this.todos = new ArrayList<>();
this.currentSorting = "id";
this.filteredToDos = new ArrayList<>();
this.currentFilters = List.of("", "All", "All");
}
// Return all to dos.
@Override
public List<ToDos> findAll() {
return this.todos;
}
// Return all to dos and sorted.
@Override
public List<ToDos> findAll(Sort sort) {
List<ToDos> sortedList = new ArrayList<>(this.todos);
try {
Comparator<ToDos> comparator = this.getToDoComparator(sort);
Collections.sort(sortedList, comparator);
} catch (Exception e) {
throw new RuntimeException(e);
}
return sortedList;
}
// Save new element.
@Override
public <S extends ToDos> S save(S entity) {
if (entity.getId() != null) {
// If the entity has an ID, search for it in our list of to dos and
// replace it.
ToDos selectedToDo;
for (int index = 0; index < this.todos.size(); index++) {
selectedToDo = this.todos.get(index);
if (Objects.equals(selectedToDo.getId(), entity.getId())) {
this.todos.set(index, entity);
return null;
}
}
} else {
// If entity doesn't have an ID, assign it a new one.
entity.setId(++this.lastId);
}
// If the ID couldn't be found or the entity didn't exist, append the
// entity to our list.
this.todos.add(entity);
return null;
}
// Retrieve a to do.
@Override
public ToDos getById(Integer integer) {
ToDos selectedToDo;
for (int index = 0; index < this.todos.size(); index++) {
selectedToDo = this.todos.get(index);
if (Objects.equals(selectedToDo.getId(), integer)) {
return selectedToDo;
}
}
return null;
}
// Delete a to do.
@Override
public void deleteById(Integer integer) {
ToDos selectedToDo;
for (int index = 0; index < this.todos.size(); index++) {
selectedToDo = this.todos.get(index);
if (Objects.equals(selectedToDo.getId(), integer)) {
this.todos.remove(index);
break;
}
}
}
// Get to dos list filtered.
public List<ToDos> findAllWithFilter(String name, String priority, String done) throws Exception {
List<ToDos> filtered = new ArrayList<>(this.todos);
if (name != null && !name.equals("")) {
filtered = filtered.stream()
.filter(todo -> todo.getText().contains(name))
.collect(Collectors.toList());
}
if (priority != null && !priority.equalsIgnoreCase("all")) {
filtered = filtered.stream()
.filter(todo -> Objects.equals(String.valueOf(todo.getPriority()), priority))
.collect(Collectors.toList());
}
if (done != null && !done.equalsIgnoreCase("all")) {
switch (done) {
case "Done":
filtered = filtered.stream()
.filter(ToDos::isDone)
.collect(Collectors.toList());
break;
case "Undone":
filtered = filtered.stream()
.filter(todo -> !todo.isDone())
.collect(Collectors.toList());
break;
default:
throw new Exception("Filtering not supported on 'done'.");
}
}
return filtered;
}
private Comparator<ToDos> getToDoComparator(Sort sort) throws Exception {
// Personal function. Creates a `Comparator` based on the `sort`
// parameter. This is for us to successfully sort our List without the
// need of a database.
String sortString = sort.toString(); // <- '{field}: {order}'
String[] sortCriteria = sortString.split(": ");
String field = sortCriteria[0];
String order = sortCriteria[1];
Comparator<ToDos> comparator = null;
switch (field) {
case "Id":
comparator = Comparator.comparing(ToDos::getId);
break;
case "Priority":
comparator = Comparator.comparing(ToDos::getPriority);
break;
case "DueDate":
comparator = Comparator.comparing(ToDos::getDueDate);
break;
default:
throw new Exception("Field sorting not implemented.");
}
if (order.equalsIgnoreCase("desc")) {
comparator = comparator.reversed();
}
return comparator;
}
/*
* N O T Y E T D E F I N E D .
*/
@Override
public void flush() {
}
@Override
public <S extends ToDos> S saveAndFlush(S entity) {
return null;
}
@Override
public <S extends ToDos> List<S> saveAllAndFlush(Iterable<S> entities) {
return null;
}
@Override
public void deleteAllInBatch(Iterable<ToDos> entities) {
}
@Override
public void deleteAllByIdInBatch(Iterable<Integer> integers) {
}
@Override
public void deleteAllInBatch() {
}
@Override
public ToDos getOne(Integer integer) {
return null;
}
@Override
public ToDos getReferenceById(Integer integer) {
return null;
}
@Override
public <S extends ToDos> Optional<S> findOne(Example<S> example) {
return Optional.empty();
}
@Override
public <S extends ToDos> List<S> findAll(Example<S> example) {
return null;
}
@Override
public <S extends ToDos> List<S> findAll(Example<S> example, Sort sort) {
return null;
}
@Override
public <S extends ToDos> Page<S> findAll(Example<S> example, Pageable pageable) {
return null;
}
@Override
public <S extends ToDos> long count(Example<S> example) {
return 0;
}
@Override
public <S extends ToDos> boolean exists(Example<S> example) {
return false;
}
@Override
public <S extends ToDos, R> R findBy(Example<S> example, Function<FluentQuery.FetchableFluentQuery<S>, R> queryFunction) {
return null;
}
@Override
public <S extends ToDos> List<S> saveAll(Iterable<S> entities) {
return null;
}
@Override
public Optional<ToDos> findById(Integer integer) {
return Optional.empty();
}
@Override
public boolean existsById(Integer integer) {
return false;
}
@Override
public List<ToDos> findAllById(Iterable<Integer> integers) {
return null;
}
@Override
public long count() {
return 0;
}
@Override
public void delete(ToDos entity) {
}
@Override
public void deleteAllById(Iterable<? extends Integer> integers) {
}
@Override
public void deleteAll(Iterable<? extends ToDos> entities) {
}
@Override
public void deleteAll() {
}
@Override
public Page<ToDos> findAll(Pageable pageable) {
return null;
}
}
