smReader.js

//Proprietary script to convert Stepmania SM files to JSON objects usable in faerie.FM

//Format for the Output Data
var obj = {
  greenDust:{
    name: 'greenDust',
    fileName: 'greenDust',
    color: 'red',
    quantity: 50,
    animated: false,
    frames: undefined,
    x:[],
    y:[],
    ix:[],
    iy:[]
  },
  wall: {
    name: 'wall',
    fileName: 'wall',
    color: 'blue',
    quantity: 50,
    animated: false,
    frames: undefined,
    x: [],
    y: [],
    ix: [],
    iy: []
  },
  settings: {
    name: 'settings',
    bpm: BPM
    }
}




//globals
var fs = require('fs');
var filePath = process.argv[2];
var path = require('path');
var fileName = path.basename(filePath, '.sm');
var outFile = path.join("levels" + '.json');
var noteSection = false;
var doubleSection = false;
var beginnerSong = false;
var beginnerNotes = [];
var mediumNotes = [];
var beginnerBox=[];
var titleBox=[];
var linePos = 0;
var fileData, splitData, BPM, lineTotal, measureNum, measureLength, noteTime;
 


//First take in Data from the command line
fileData = fs.readFileSync(filePath, 'utf8');


//Process the data
splitData = fileData.split(" ");
console.log(splitData);

var arrayLength = splitData.length;

for(var i=0; i<arrayLength; i++){
  if(splitData[i]== '----------------\r\n#NOTES:\r\n'){
    console.log("Notes section found...");
    noteSection = true;   
  }
  
  else if(i==1){
    var titleData = splitData[i];
    titleBox = titleData.split("\r\n");
    for(var k=0; k<titleBox.length; k++){
      var bpmBox = titleBox[k];
      if(bpmBox.indexOf("BPMS") >= 0){
        var bpmBoxSplit = bpmBox.split("=");
        BPM = parseInt(bpmBoxSplit[1]);
        console.log("BPM found: " + BPM);
      }
    }
  }
  
  else if(splitData[i]=='dance-double:\r\n' && noteSection==true){
    console.log("Doubles section found...");
    doubleSection = true;
  }
  else if(splitData[i]=='Beginner:\r\n' && doubleSection==true){
    beginnerSong = true;
    mediumSong = false;  
  }
  else if(splitData[i]=='Medium:\r\n'){
    mediumSong = true;
    beginnerSong = false;
  }
  else if(splitData[i]=='measure' && noteSection==true && doubleSection==true)  {
    var j = i+1;
    if(beginnerSong==true){
      beginnerNotes.push(splitData[j]);
    }
    else if(mediumSong==true){
      mediumNotes.push(splitData[j]);
    }
  }
  else if(splitData[i]=='dance-single:\r\n'){
    noteSection = false;
    doubleSection = false;
    beginnerSong = false;
    mediumSong = false;
  }
}


//Error Messages go here
if(noteSection=false){
  console.log("Notes section not found!");
}


console.log(beginnerNotes);

function splitNotes(){

  for(var i=0; i<beginnerNotes.length; i++){
    var currentString = beginnerNotes[i];
    var beginnerSplit = currentString.split("\r\n");
    beginnerBox.push(beginnerSplit);
  }
 
  console.log(beginnerBox);
}

splitNotes();


//Convert Data to actual times here

//BPM, measureLength, linePos, lineTotal, measureNum


function getMeasureLength(){    
  measureLength = (60/BPM)*4;
}
getMeasureLength();

function getNoteTime(){
  for(i=0; i<beginnerBox.length; i++){
    linePos = 0;
    for(j=1; j<=beginnerBox[i].length-2; j++){
      linePos++; 
      lineTotal = beginnerBox[i].length-2;
      measureNum = parseInt(beginnerBox[i][0]);
      if(beginnerBox[i][j].indexOf("1")>=0){
        //calculate y time
        noteTime = (linePos-1)*(measureLength/lineTotal)+(measureNum*measureLength);
        
        //calculate x position
        let ix = [];
        let pushCount = 1;

        let boxline = beginnerBox[i][j];
        for(q=0; q<boxline.length; q++){
          if(boxline.charAt(q)=="1"){
            switch(q){
              case 0: 
                ix.push(87);
                break;
              case 1:
                ix.push(222);
                break;
              case 2:
                ix.push(359);
                break;
              case 3:
                ix.push(496);
                break;
              case 4:
                ix.push(633);
                break;
              case 5:
                break;
              case 6:
                break; 
            }
          }  
        }
        
        pushCount = ix.length;
        for(k=0; k<ix.length; k++){
          obj['greenDust']['ix'].push(ix[k]);
        }

        for(l=0; l<pushCount; l++){
          obj['greenDust']['iy'].push(noteTime);
        }

      }
       

        if(beginnerBox[i][j].indexOf("M")>=0){
        //calculate y time of the Wall obstacle
        noteTime = (linePos-1)*(measureLength/lineTotal)+(measureNum*measureLength);
        
        //calculate x position of the wall obstacle
        let ix = [];
        let pushCount = 1;
        let boxline = beginnerBox[i][j];
        for(p=0; p<boxline.length; p++){
          if(boxline.charAt(p)=="M"){
            switch(p){
              case 0: 
                ix.push(87);
                break;
              case 1:
                ix.push(222);
                break;
              case 2:
                ix.push(359);
                break;
              case 3:
                ix.push(496);
                break;
              case 4:
                ix.push(633);
                break;
              case 5:
                break;
              case 6:
                break; 
            }
          }  
        }
        
        pushCount = ix.length;
      
        for(m=0; m<ix.length; m++){
          obj['wall']['ix'].push(ix[m]);
        }

        for(n=0; n<pushCount; n++){
          obj['wall']['iy'].push(noteTime);
        }

    }
  }
}
}
obj['settings']['bpm'] = BPM;
getNoteTime();
console.log(obj);


//Error Messages go here
if(noteSection=false){
  console.log("Notes section not found!");
}

//Write then data to a new file

var JSONobj = JSON.stringify(obj);

var inData = "\r\n" + "var " + fileName + " = " + "'" + JSONobj + "'";

fs.appendFileSync(outFile, inData, 'utf-8');