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package eu.dnetlib.pace.model;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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import java.util.Set;
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import com.google.common.collect.Lists;
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import com.google.common.collect.Sets;
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public class PersonComparatorUtils {
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private static final int MAX_FULLNAME_LENGTH = 50;
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public static Set<String> getNgramsForPerson(String fullname) {
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Set<String> set = Sets.newHashSet();
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if (fullname.length() > MAX_FULLNAME_LENGTH) {
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return set;
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}
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Person p = new Person(fullname, true);
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if (p.isAccurate()) {
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for (String name : p.getName()) {
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for (String surname : p.getSurname()) {
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set.add((name.charAt(0) + "_" + surname).toLowerCase());
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}
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}
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} else {
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List<String> list = p.getFullname();
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for (int i = 0; i < list.size(); i++) {
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if (list.get(i).length() > 1) {
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for (int j = 0; j < list.size(); j++) {
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if (i != j) {
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set.add((list.get(j).charAt(0) + "_" + list.get(i)).toLowerCase());
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}
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}
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}
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}
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}
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return set;
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}
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public static boolean areSimilar(String s1, String s2) {
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Person p1 = new Person(s1, true);
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Person p2 = new Person(s2, true);
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if (p1.isAccurate() && p2.isAccurate()) {
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return verifyNames(p1.getName(), p2.getName()) && verifySurnames(p1.getSurname(), p2.getSurname());
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} else {
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return verifyFullnames(p1.getFullname(), p2.getFullname());
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}
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}
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private static boolean verifyNames(List<String> list1, List<String> list2) {
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return verifySimilarity(extractExtendedNames(list1), extractExtendedNames(list2))
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&& verifySimilarity(extractInitials(list1), extractInitials(list2));
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}
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private static boolean verifySurnames(List<String> list1, List<String> list2) {
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if (list1.size() != list2.size()) {
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return false;
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}
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for (int i = 0; i < list1.size(); i++) {
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if (!list1.get(i).equalsIgnoreCase(list2.get(i))) {
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return false;
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}
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}
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return true;
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}
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private static boolean verifyFullnames(List<String> list1, List<String> list2) {
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Collections.sort(list1);
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Collections.sort(list2);
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return verifySimilarity(extractExtendedNames(list1), extractExtendedNames(list2))
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&& verifySimilarity(extractInitials(list1), extractInitials(list2));
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}
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private static List<String> extractExtendedNames(List<String> list) {
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ArrayList<String> res = Lists.newArrayList();
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for (String s : list) {
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if (s.length() > 1) {
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res.add(s.toLowerCase());
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}
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}
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return res;
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}
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private static List<String> extractInitials(List<String> list) {
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ArrayList<String> res = Lists.newArrayList();
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for (String s : list) {
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res.add(s.substring(0, 1).toLowerCase());
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}
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return res;
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}
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private static boolean verifySimilarity(List<String> list1, List<String> list2) {
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if (list1.size() > list2.size()) {
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return verifySimilarity(list2, list1);
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}
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// NB: List2 is greater than list1 (or equal)
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int pos = -1;
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for (String s : list1) {
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int curr = list2.indexOf(s);
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if (curr > pos) {
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list2.set(curr, "*"); // I invalidate the found element, example: "amm - amm"
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pos = curr;
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} else {
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return false;
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}
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}
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return true;
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}
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}
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