Migrate BMS Songs-Charts

Fixes #9

server/.gitignore

@@ -13,3 +13,6 @@ coverage
 scripts/arc-db-sync/charts.json
 scripts/arc-db-sync/songs.json
 scripts/validate-database-errs/*
+
+scripts/parse-beatoraja-mdb/*
+!scripts/parse-beatoraja-mdb/main.ts

server/scripts/parse-beatoraja-mdb/main.ts

@@ -0,0 +1,85 @@
+/* eslint-disable @typescript-eslint/ban-ts-comment */
+/* eslint-disable no-console */
+/* eslint-disable @typescript-eslint/no-var-requires */
+
+// @ts-nocheck
+// yeah, this script is old and wrote in JS. what of it.
+const sqlDB = require("better-sqlite3")("songdata.db");
+const fs = require("fs");
+
+console.log("Connecting to database...");
+console.time("DB CONNECT TIME");
+const crypto = require("crypto");
+
+const ktchiSongs = [];
+const ktchiCharts = [];
+
+const stmt = sqlDB.prepare("SELECT * FROM song");
+
+let freeSongID = 1;
+
+const DIFFICULTY_LOOKUP = ["CUSTOM", "BEGINNER", "NORMAL", "HYPER", "ANOTHER", "CUSTOM"];
+
+const PLAYTYPE_LOOKUP = {
+    7: "7K",
+    14: "14K",
+    5: "5K",
+    10: "10K",
+};
+
+for (const song of stmt.iterate()) {
+    const playtype = PLAYTYPE_LOOKUP[song.mode.toString()];
+
+    const songID = freeSongID;
+    const chartID = crypto.randomBytes(20).toString("hex");
+
+    let difficulty = DIFFICULTY_LOOKUP[song.difficulty];
+
+    freeSongID++;
+
+    if (!difficulty) {
+        console.log(song.difficulty);
+        difficulty = "CUSTOM"; // fuck it and fuck you, you bitch.
+    }
+
+    const ktchiChart = {
+        songID,
+        chartID: chartID,
+        rgcID: null,
+        data: {
+            notecount: song.notes,
+            hashMD5: song.md5,
+            hashSHA256: song.sha256,
+        },
+        level: "?",
+        levelNum: 0,
+        difficulty,
+        playtype,
+        isPrimary: true,
+        versions: [],
+    };
+
+    const ktchiSong = {
+        id: songID,
+        title: song.title,
+        artist: song.artist,
+        firstVersion: null,
+        data: {
+            subtitle: song.subtitle ?? null,
+            subartist: song.subartist ?? null,
+            genre: song.genre ?? null,
+        },
+        "search-titles": [],
+        "alt-titles": [],
+    };
+
+    ktchiSongs.push(ktchiSong);
+    ktchiCharts.push(ktchiChart);
+}
+
+console.log("done");
+
+fs.writeFileSync("songs.json", JSON.stringify(ktchiSongs));
+fs.writeFileSync("charts.json", JSON.stringify(ktchiCharts));
+
+console.log("postwrite");