backend/restservice/src/main/java/com/plannaplan/responses/mappers/GroupsMappers.java

package com.plannaplan.responses.mappers;

import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
import java.util.stream.Collectors;

import com.plannaplan.entities.Groups;
import com.plannaplan.responses.models.GroupDefaultResponse;
import com.plannaplan.responses.models.CourseWithGroupsResponse;
import com.plannaplan.responses.models.GroupWithCapacityResponse;
import com.plannaplan.types.GroupType;

public class GroupsMappers {
    public static List<GroupDefaultResponse> mapToDefaultResponse(List<Groups> groups) {
        return groups.stream().filter(Objects::nonNull).map(GroupDefaultResponse::new).collect(Collectors.toList());
    }

    public static List<GroupWithCapacityResponse> mapToCapacityResponse(List<Groups> groups) {
        return groups.stream().filter(Objects::nonNull).map(GroupWithCapacityResponse::new)
                .collect(Collectors.toList());
    }

    public static CourseWithGroupsResponse<GroupDefaultResponse> mapToGetCourseGroupsDefaultResponse(
            List<Groups> groups) {

        List<GroupDefaultResponse> lectures = new ArrayList<>();
        List<GroupDefaultResponse> classes = new ArrayList<>();

        groups.stream().forEach(group -> {
            if (group.getType() == GroupType.CLASS) {
                classes.add(new GroupDefaultResponse(group));
            } else {
                lectures.add(new GroupDefaultResponse(group));
            }
        });

        return new CourseWithGroupsResponse<>(classes, lectures);
    }

    public static CourseWithGroupsResponse<GroupWithCapacityResponse> mapToGetCourseGroupsWithCapacityResponse(
            List<Groups> groups) {

        List<GroupWithCapacityResponse> lectures = new ArrayList<>();
        List<GroupWithCapacityResponse> classes = new ArrayList<>();

        groups.stream().forEach(group -> {
            if (group.getType() == GroupType.CLASS) {
                classes.add(new GroupWithCapacityResponse(group));
            } else {
                lectures.add(new GroupWithCapacityResponse(group));
            }
        });

        return new CourseWithGroupsResponse<>(classes, lectures);
    }

}