added midi-data rpc

src/procedures/midi-data/midi-data.js

@@ -0,0 +1,70 @@
+/**
+ * This service allows users to access midi files of different songs.
+ * @alpha
+ * @service
+ * @category Music
+ */
+
+"use strict";
+
+const fsp = require("fs/promises");
+const { registerTypes } = require("./types");
+const { MidiReader } = require("./midi-api");
+const path = require("path");
+const MidiData = {};
+const midiLibrary = require("./MidiLibrary/midiLibrary.json");
+
+registerTypes();
+
+/**
+ * Get a song by name
+ * @param {String=} nameOfSong
+ * @returns {[Object{name: String, notes: [Note]}]}
+ */
+MidiData.getSongData = async function (nameOfSong = "") {
+  const metadata = midiLibrary.netsbloxMidiLibrary.find((obj) =>
+    obj.Name === nameOfSong
+  );
+  if (metadata) {
+    const midiPath = path.join(__dirname, "./MidiLibrary/", metadata.Path);
+    const data = await fsp.readFile(midiPath);
+    const raw = new Uint8Array(data);
+    const midi = new MidiReader(raw.buffer);
+    return midi.getNotes();
+  }
+  throw new Error("Song not found");
+};
+
+/**
+ * Get songs based on query.
+ * @param {Composers=} composer
+ * @param {Styles=} style
+ * @param {String=} search
+ * @returns {Array}
+ */
+MidiData.findSong = async function (composer = "", style = "", search = "") {
+  var names = [];
+  let queriedJSON = "";
+
+  //Ensure at least one field is selected
+  if (composer !== "" || search !== "" || style !== "") {
+    queriedJSON = midiLibrary.netsbloxMidiLibrary.filter(function (obj) { // Check if field value is empty before finding obj with value.
+      return (composer === "" || obj.Composer === composer) &&
+        (style === "" || obj.Style === style) &&
+        (search === "" || obj.Name.indexOf(search) !== -1);
+    });
+  } else {
+    queriedJSON = midiLibrary.netsbloxMidiLibrary.filter(function (obj) {
+      return true;
+    });
+  }
+
+  //Convert JSON to array of String names
+  for (let i = 0; i < queriedJSON.length; i++) {
+    names.push(queriedJSON[i].Name);
+  }
+
+  return names;
+};
+
+module.exports = MidiData;

src/procedures/midi-data/types.js

@@ -0,0 +1,48 @@
+const types = require("../../input-types");
+
+const COMPOSERS = [
+  "J.S. Bach",
+  "Beethoven",
+  "Mozart",
+  "Haydn",
+  "Debussy",
+  "Traditional",
+  "O. Comeau",
+  "S. C. Foster",
+  "C. J. Brown",
+  "F. Abt",
+  "E. Grieg",
+  "E. Satie",
+  "Spagnoletti",
+  "Kruetzer",
+  "Yaniewicz",
+];
+
+const STYLES = [
+  "Classical",
+  "Baroque",
+  "Folk",
+  "Gospel",
+  "Hymn",
+  "Modern",
+  "Romantic",
+  "Popular / Dance",
+];
+
+function registerTypes() {
+  types.defineType({
+    name: "Composers",
+    description: "List of available composers",
+    baseType: "Enum",
+    baseParams: COMPOSERS,
+  });
+
+  types.defineType({
+    name: "Styles",
+    description: "List of available styles",
+    baseType: "Enum",
+    baseParams: STYLES,
+  });
+}
+
+module.exports = { registerTypes };