universe@121: package de.uapcore.lightpit.viewmodel.util;
universe@121: 
universe@121: import de.uapcore.lightpit.entities.Issue;
universe@150: import de.uapcore.lightpit.entities.IssueStatusPhase;
universe@121: 
universe@121: import java.util.Arrays;
universe@121: import java.util.Comparator;
universe@121: 
universe@121: public class IssueSorter implements Comparator<Issue> {
universe@121: 
universe@121:     public enum Field {
universe@141:         DONE, ETA, UPDATED
universe@121:     }
universe@121: 
universe@121:     public static class Criteria {
universe@121:         private Field field;
universe@121:         private boolean asc;
universe@121: 
universe@121:         public Criteria(Field field, boolean asc) {
universe@121:             this.field = field;
universe@121:             this.asc = asc;
universe@121:         }
universe@121: 
universe@121:         @Override
universe@121:         public boolean equals(Object obj) {
universe@121:             if (obj == null || !obj.getClass().equals(Criteria.class))
universe@121:                 return false;
universe@121:             final var other = (Criteria)obj;
universe@121:             return other.field.equals(field) && other.asc == asc;
universe@121:         }
universe@121:     }
universe@121: 
universe@121:     private final Criteria[] criteria;
universe@121: 
universe@121:     public IssueSorter(Criteria ... criteria) {
universe@121:         this.criteria = criteria;
universe@121:     }
universe@121: 
universe@121:     private int compare(Issue left, Issue right, Criteria criteria) {
universe@155:         if (left.equals(right))
universe@155:             return 0;
universe@155: 
universe@121:         int result;
universe@121:         switch (criteria.field) {
universe@141:             case DONE:
universe@121:                 result = Boolean.compare(
universe@150:                         left.getStatus().getPhase().equals(IssueStatusPhase.Companion.getDone()),
universe@150:                         right.getStatus().getPhase().equals(IssueStatusPhase.Companion.getDone()));
universe@121:                 break;
universe@121:             case ETA:
universe@121:                 if (left.getEta() != null && right.getEta() != null)
universe@121:                     result = left.getEta().compareTo(right.getEta());
universe@155:                 else if (left.getEta() == null && right.getEta() == null)
universe@155:                     result = 0;
universe@121:                 else
universe@143:                     result = left.getEta() != null ? -1 : 1;
universe@121:                 break;
universe@121:             case UPDATED:
universe@121:                 result = left.getUpdated().compareTo(right.getUpdated());
universe@121:                 break;
universe@121:             default:
universe@121:                 throw new UnsupportedOperationException();
universe@121:         }
universe@121:         return criteria.asc ? result : -result;
universe@121:     }
universe@121: 
universe@121:     @Override
universe@121:     public int compare(Issue left, Issue right) {
universe@121:         for (var c : criteria) {
universe@121:             int r = compare(left, right, c);
universe@121:             if (r != 0) return r;
universe@121:         }
universe@121:         return 0;
universe@121:     }
universe@121: 
universe@121:     @Override
universe@121:     public boolean equals(Object o) {
universe@121:         if (o == null || !o.getClass().equals(IssueSorter.class))
universe@121:             return false;
universe@121:         final var other = (IssueSorter) o;
universe@121:         return Arrays.equals(criteria, other.criteria);
universe@121:     }
universe@121: }