Initial chapter number recognition (needs improvement). Remove an old class.

app/src/main/java/eu/kanade/mangafeed/data/models/Chapter.java

@@ -32,6 +32,9 @@ public class Chapter {
     @StorIOSQLiteColumn(name = ChaptersTable.COLUMN_DATE_UPLOAD)
     public long date_upload;
 
+    @StorIOSQLiteColumn(name = ChaptersTable.COLUMN_CHAPTER_NUMBER)
+    public float chapter_number;
+
     public int downloaded;
 
     public static final int UNKNOWN = 0;
@@ -58,7 +61,7 @@ public class Chapter {
     }
 
     public static Chapter newChapter() {
-        Chapter c = new Chapter();
-        return c;
+        return new Chapter();
     }
+
 }

app/src/main/java/eu/kanade/mangafeed/data/tables/ChaptersTable.java

@@ -31,6 +31,9 @@ public class ChaptersTable {
 	@NonNull
 	public static final String COLUMN_LAST_PAGE_READ = "last_page_read";
 
+	@NonNull
+	public static final String COLUMN_CHAPTER_NUMBER = "chapter_number";
+
 	@NonNull
 	public static String getCreateTableQuery() {
 		return "CREATE TABLE " + TABLE + "("
@@ -40,6 +43,7 @@ public class ChaptersTable {
 				+ COLUMN_NAME + " TEXT NOT NULL, "
 				+ COLUMN_READ + " BOOLEAN NOT NULL, "
 				+ COLUMN_LAST_PAGE_READ + " INT NOT NULL, "
+				+ COLUMN_CHAPTER_NUMBER + " FLOAT NOT NULL, "
 				+ COLUMN_DATE_FETCH + " LONG NOT NULL, "
 				+ COLUMN_DATE_UPLOAD + " LONG NOT NULL, "
 				+ "FOREIGN KEY(" + COLUMN_MANGA_ID + ") REFERENCES " + MangasTable.TABLE + "(" + MangasTable.COLUMN_ID + ") "

app/src/main/java/eu/kanade/mangafeed/util/ChapterRecognition.java

@@ -0,0 +1,102 @@
+package eu.kanade.mangafeed.util;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import eu.kanade.mangafeed.data.models.Chapter;
+import eu.kanade.mangafeed.data.models.Manga;
+
+public class ChapterRecognition {
+
+    private static Pattern p1 = Pattern.compile("ch.?(\\d+[\\.,]?\\d*)");
+    private static Pattern p2 = Pattern.compile("(\\d+[\\.,]?\\d*)");
+
+    public static void parseChapterNumber(Chapter chapter, Manga manga) {
+        if (chapter.chapter_number != 0)
+            return;
+
+        // Remove spaces and convert to lower case
+        String name = replaceIrrelevantCharacters(chapter.name);
+        Matcher matcher;
+
+        // Safest option, the chapter has a token prepended
+        matcher = p1.matcher(name);
+        if (matcher.find()) {
+            chapter.chapter_number = Float.parseFloat(matcher.group(1));
+            return;
+        }
+
+        // If there's only one number, use it
+        matcher = p2.matcher(name);
+        List<Float> occurences = getAllOccurrences(matcher);
+        if (occurences.size() == 1) {
+            chapter.chapter_number =  occurences.get(0);
+            return;
+        }
+
+        // Try to remove the manga name from the chapter, and try again
+        String mangaName = replaceIrrelevantCharacters(manga.title);
+        String nameWithoutManga = difference(mangaName, name);
+        if (!nameWithoutManga.isEmpty()) {
+            matcher = p2.matcher(nameWithoutManga);
+            occurences = getAllOccurrences(matcher);
+            if (occurences.size() == 1) {
+                chapter.chapter_number =  occurences.get(0);
+                return;
+            }
+        }
+
+        // TODO more checks (maybe levenshtein?)
+
+    }
+
+    public static List<Float> getAllOccurrences(Matcher matcher) {
+        List<Float> occurences = new ArrayList<>();
+        while (matcher.find()) {
+            try {
+                float value = Float.parseFloat(matcher.group());
+                if (!occurences.contains(value))
+                    occurences.add(value);
+            } catch (NumberFormatException e) { /* Do nothing */ }
+        }
+        return occurences;
+    }
+
+    public static String replaceIrrelevantCharacters(String str) {
+        return str.replaceAll("\\s+", "").toLowerCase();
+    }
+
+    public static String difference(String str1, String str2) {
+        if (str1 == null) {
+            return str2;
+        }
+        if (str2 == null) {
+            return str1;
+        }
+        int at = indexOfDifference(str1, str2);
+        if (at == -1) {
+            return "";
+        }
+        return str2.substring(at);
+    }
+    public static int indexOfDifference(String str1, String str2) {
+        if (str1 == str2) {
+            return -1;
+        }
+        if (str1 == null || str2 == null) {
+            return 0;
+        }
+        int i;
+        for (i = 0; i < str1.length() && i < str2.length(); ++i) {
+            if (str1.charAt(i) != str2.charAt(i)) {
+                break;
+            }
+        }
+        if (i < str2.length() || i < str1.length()) {
+            return i;
+        }
+        return -1;
+    }
+}

app/src/main/java/eu/kanade/mangafeed/util/DummyDataUtil.java

@@ -1,52 +0,0 @@
-package eu.kanade.mangafeed.util;
-
-import java.util.ArrayList;
-import java.util.List;
-
-import eu.kanade.mangafeed.data.models.Chapter;
-import eu.kanade.mangafeed.data.models.Manga;
-
-/**
- * Created by len on 8/10/15.
- */
-public class DummyDataUtil {
-
-    public static List<Manga> createDummyManga() {
-        ArrayList<Manga> mangas = new ArrayList<>();
-        mangas.add(createDummyManga("One Piece"));
-        mangas.add(createDummyManga("Berserk"));
-        mangas.add(createDummyManga("Horimiya"));
-        mangas.add(createDummyManga("Übel Blatt"));
-
-        return mangas;
-    }
-
-    private static Manga createDummyManga(String title) {
-        Manga m = new Manga();
-        m.title = title;
-        m.url="http://example.com";
-        m.artist="Eiichiro Oda";
-        m.author="Eiichiro Oda";
-        m.description="...";
-        m.genre="Action, Drama";
-        m.status="Ongoing";
-        m.thumbnail_url="http://example.com/pic.png";
-        return m;
-    }
-
-    public static List<Chapter> createDummyChapters() {
-        List<Chapter> chapters = new ArrayList<>();
-        Chapter c;
-
-        for (int i = 1; i < 50; i++) {
-            c = new Chapter();
-            c.manga_id = 1L;
-            c.name = "Chapter " + i;
-            c.url = "http://example.com/1";
-            chapters.add(c);
-        }
-
-        return chapters;
-    }
-
-}

app/src/test/java/eu/kanade/mangafeed/ChapterRecognitionTest.java

@@ -0,0 +1,87 @@
+package eu.kanade.mangafeed;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import eu.kanade.mangafeed.data.models.Chapter;
+import eu.kanade.mangafeed.data.models.Manga;
+import eu.kanade.mangafeed.util.ChapterRecognition;
+
+import static org.hamcrest.Matchers.is;
+import static org.junit.Assert.assertThat;
+
+public class ChapterRecognitionTest {
+
+    Manga randomManga;
+
+    private Chapter createChapter(String title) {
+        Chapter chapter = new Chapter();
+        chapter.name = title;
+        return chapter;
+    }
+
+    @Before
+    public void setUp() {
+        randomManga = new Manga();
+        randomManga.title = "Something";
+    }
+
+    @Test
+    public void testWithOneDigit() {
+        Chapter c = createChapter("Ch.3: Self-proclaimed Genius");
+        ChapterRecognition.parseChapterNumber(c, randomManga);
+        assertThat(c.chapter_number, is(3f));
+    }
+
+    @Test
+    public void testWithVolumeBefore() {
+        Chapter c = createChapter("Vol.1 Ch.4: Misrepresentation");
+        ChapterRecognition.parseChapterNumber(c, randomManga);
+        assertThat(c.chapter_number, is(4f));
+    }
+
+    @Test
+    public void testWithVolumeAndVersionNumber() {
+        Chapter c = createChapter("Vol.1 Ch.3 (v2) Read Online");
+        ChapterRecognition.parseChapterNumber(c, randomManga);
+        assertThat(c.chapter_number, is(3f));
+    }
+
+    @Test
+    public void testWithVolumeAndNumberInTitle() {
+        Chapter c = createChapter("Vol.15 Ch.90: Here Blooms the Daylily, Part 4");
+        ChapterRecognition.parseChapterNumber(c, randomManga);
+        assertThat(c.chapter_number, is(90f));
+    }
+
+    @Test
+    public void testWithVolumeAndSpecialChapter() {
+        Chapter c = createChapter("Vol.10 Ch.42.5: Homecoming (Beginning)");
+        ChapterRecognition.parseChapterNumber(c, randomManga);
+        assertThat(c.chapter_number, is(42.5f));
+    }
+
+    @Test
+    public void testWithJustANumber() {
+        Chapter c = createChapter("Homecoming (Beginning) 42");
+        ChapterRecognition.parseChapterNumber(c, randomManga);
+        assertThat(c.chapter_number, is(42f));
+    }
+
+    @Test
+    public void testWithJustASpecialChapter() {
+        Chapter c = createChapter("Homecoming (Beginning) 42.5");
+        ChapterRecognition.parseChapterNumber(c, randomManga);
+        assertThat(c.chapter_number, is(42.5f));
+    }
+
+    @Test
+    public void testWithNumberinMangaTitle() {
+        Chapter c = createChapter("3x3 Eyes 96");
+        Manga m = new Manga();
+        m.title = "3x3 Eyes";
+        ChapterRecognition.parseChapterNumber(c, m);
+        assertThat(c.chapter_number, is(96f));
+    }
+
+}