mirror of
https://github.com/mihonapp/mihon.git
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103 lines
3.1 KiB
Java
103 lines
3.1 KiB
Java
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package eu.kanade.mangafeed.util;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import eu.kanade.mangafeed.data.models.Chapter;
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import eu.kanade.mangafeed.data.models.Manga;
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public class ChapterRecognition {
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private static Pattern p1 = Pattern.compile("ch.?(\\d+[\\.,]?\\d*)");
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private static Pattern p2 = Pattern.compile("(\\d+[\\.,]?\\d*)");
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public static void parseChapterNumber(Chapter chapter, Manga manga) {
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if (chapter.chapter_number != 0)
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return;
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// Remove spaces and convert to lower case
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String name = replaceIrrelevantCharacters(chapter.name);
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Matcher matcher;
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// Safest option, the chapter has a token prepended
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matcher = p1.matcher(name);
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if (matcher.find()) {
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chapter.chapter_number = Float.parseFloat(matcher.group(1));
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return;
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}
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// If there's only one number, use it
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matcher = p2.matcher(name);
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List<Float> occurences = getAllOccurrences(matcher);
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if (occurences.size() == 1) {
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chapter.chapter_number = occurences.get(0);
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return;
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}
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// Try to remove the manga name from the chapter, and try again
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String mangaName = replaceIrrelevantCharacters(manga.title);
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String nameWithoutManga = difference(mangaName, name);
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if (!nameWithoutManga.isEmpty()) {
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matcher = p2.matcher(nameWithoutManga);
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occurences = getAllOccurrences(matcher);
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if (occurences.size() == 1) {
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chapter.chapter_number = occurences.get(0);
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return;
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}
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}
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// TODO more checks (maybe levenshtein?)
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}
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public static List<Float> getAllOccurrences(Matcher matcher) {
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List<Float> occurences = new ArrayList<>();
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while (matcher.find()) {
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try {
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float value = Float.parseFloat(matcher.group());
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if (!occurences.contains(value))
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occurences.add(value);
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} catch (NumberFormatException e) { /* Do nothing */ }
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}
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return occurences;
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}
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public static String replaceIrrelevantCharacters(String str) {
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return str.replaceAll("\\s+", "").toLowerCase();
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}
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public static String difference(String str1, String str2) {
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if (str1 == null) {
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return str2;
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}
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if (str2 == null) {
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return str1;
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}
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int at = indexOfDifference(str1, str2);
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if (at == -1) {
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return "";
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}
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return str2.substring(at);
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}
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public static int indexOfDifference(String str1, String str2) {
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if (str1 == str2) {
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return -1;
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}
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if (str1 == null || str2 == null) {
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return 0;
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}
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int i;
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for (i = 0; i < str1.length() && i < str2.length(); ++i) {
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if (str1.charAt(i) != str2.charAt(i)) {
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break;
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}
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}
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if (i < str2.length() || i < str1.length()) {
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return i;
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}
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return -1;
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}
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}
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