1 files changed, 107 insertions, 0 deletions
diff --git a/src/main/java/net/sowgro/npehero/levelapi/Notes.java b/src/main/java/net/sowgro/npehero/levelapi/Notes.java
new file mode 100644
index 0000000..1df0248
--- /dev/null
+++ b/src/main/java/net/sowgro/npehero/levelapi/Notes.java
@@ -0,0 +1,107 @@
+package net.sowgro.npehero.levelapi;
+
+import javafx.beans.property.ListProperty;
+import javafx.beans.property.SimpleListProperty;
+import javafx.collections.FXCollections;
+
+import java.io.*;
+import java.nio.charset.StandardCharsets;
+import java.util.Scanner;
+
+/**
+ * Stores all the notes for a difficulty.
+ */
+public class Notes {
+
+    private final File file;
+    private final Difficulty diff;
+
+    public ListProperty<Note> list = new SimpleListProperty<>(FXCollections.observableArrayList());
+
+    /**
+     * Create a new Notes object
+     * @param file The notes.txt file
+     * @param diff The difficulty these notes belong to
+     * @throws IOException If there is a problem reading the notes file
+     */
+    public Notes(File file, Difficulty diff) throws IOException {
+        this.file = file;
+        this.diff = diff;
+        readFile();
+    }
+
+    /**
+     * Read notes.txt and add the notes to the list
+     * @throws IOException if there is a problem reading the file.
+     */
+    public void readFile() throws IOException {
+        if (!file.exists()) {
+            return;
+        }
+        Scanner scan = new Scanner(file);
+        while (scan.hasNext()) {
+            String input = scan.next();
+            int lane = switch (input.charAt(0)) {
+                case 'd' -> 0;
+                case 'f' -> 1;
+                case 's' -> 2;
+                case 'j' -> 3;
+                case 'k' -> 4;
+                default -> -1;
+            };
+            if (lane == -1) {
+                continue;
+            }
+            double time = Double.parseDouble(input.substring(1));
+
+            if (diff.bpm != 0.0) {
+                time = beatToSecond(time, diff.bpm);
+            }
+            list.add(new Note(time, lane));
+        }
+    }
+
+    /**
+     * Writes the notes to notes.txt
+     * @throws IOException If there is a problem writing to the file.
+     */
+    public void writeFile() throws IOException{
+        var _ = file.createNewFile();
+        PrintWriter writer = new PrintWriter(file, StandardCharsets.UTF_8);
+        for (Note note : list) {
+            Character lane = switch (note.lane) {
+                case 0 -> 'd';
+                case 1 -> 'f';
+                case 2 -> 's';
+                case 3 -> 'j';
+                case 4 -> 'k';
+                default -> null;
+            };
+            if (lane == null) {
+                continue;
+            }
+            writer.println(lane + "" + note.time.get());
+        }
+        writer.close();
+    }
+
+    /**
+     * Converts a beat to a second using the levels bpm
+     * @param beat The beat to convert to seconds
+     * @param bpm The beats per minute to use for conversion
+     * @return The time in seconds the beat was at
+     */
+    public static double beatToSecond(double beat, double bpm) {
+        return beat/(bpm/60);
+    }
+
+    /**
+     * Performs a deep copy of the notes list.
+     * @return a new list of notes with the same notes.
+     */
+    public ListProperty<Note> deepCopyList() {
+        ListProperty<Note> ret = new SimpleListProperty<>(FXCollections.observableArrayList());
+        list.forEach(e -> ret.add(new Note(e)));
+        return ret;
+    }
+}