CSV Parse Using Prototype-oriented Javascript

csvuploadcheck.js

//THE REASON THAT I UNCLUDED OLD CODE COMMENTED OUT IS TO SHOW THE DISTINCTION BETWEEN MY OLD METHOD AND THE NEW OO WAY.
//DEVELOPED AFTER READING https://developer.mozilla.org/en-US/docs/Web/JavaScript/Introduction_to_Object-Oriented_JavaScript

var csv = require("ya-csv")

exports.check = function(filename,cb){
    //in the check
    
    var pusher = function(filename){
        this.filename = filename;
    }
    pusher.prototype.push = function(c){
        var reader = csv.createCsvFileReader(__dirname+'/../upload/'+filename, {columnsFromHeader:true,'separator': ','});
    
        var silo = [];
        
        reader.addListener('data', function(data){
            console.log(data)
            
            //silo[0].type will equal the type
            silo.push({album_artist:data.album_artist,
            album_title:data.album_title,
            album_grid:data.album_grid,
            album_ean:data.album_ean,
            album_upc:data.album_upc,
            album_release_date:data.album_release_date,
            album_label:data.album_label,
            album_art_filename:data.album_art_filename,
            track_number:data.track_number,
            track_title:data.track_title,
            track_filename:data.track_filename,
            track_custom_id:data.track_custom_id,
            track_artist:data.track_artist,
            track_genres:data.track_genres,
            track_isrc:data.track_isrc,
            track_pline:data.track_pline,
            track_territory_start_dates:data.track_territory_start_dates,
            track_explicit_lyrics:data.track_explicit_lyrics,
            filename:data.filename,
            custom_id:data.custom_id,
            isrc:data.isrc,
            upc:data.upc,
            grid:data.grid,
            song_title:data.song_title,
            artist:data.artist,
            album:data.album,
            genre:data.genre,
            label:data.label,
            original_release_date:data.original_release_date,
            match_policy:data.match_policy,
            ownership:data.ownership,
            admin_sync_rights:data.admin_sync_rights,
            comp_writers:data.comp_writers,
            comp_sync_ownership:data.comp_sync_ownership,
            type:data.type
            })
            
        })
        reader.addListener('end',function(){
        var type1 = new checker(silo[0].type)
        type1.typeswitch(silo,function(err,data){
            if(err) throw err;
            return c(null,'something')
        })
        })
    }
    
    //************************************************************
    //********************ENTRY POINT***************************
    var woo = new pusher(filename)
    woo.push(function(err,data){
        if(err) throw err;
        return cb(null,'something')
    })
    //************************************************************
    
    //OLD CODE BLOCK - WE NOW CREATE A NEW INSTANCE OF THE PUSHER FUNCTION EVERY TIME
    /*var reader = csv.createCsvFileReader(__dirname+'/../upload/'+filename, {columnsFromHeader:true,'separator': ','});
    
    var silo = [];
    
    reader.addListener('data', function(data){
        console.log(data)
        
        //silo[0].type will equal the type
        silo.push({album_artist:data.album_artist,
        album_title:data.album_title,
        album_grid:data.album_grid,
        album_ean:data.album_ean,
        album_upc:data.album_upc,
        album_release_date:data.album_release_date,
        album_label:data.album_label,
        album_art_filename:data.album_art_filename,
        track_number:data.track_number,
        track_title:data.track_title,
        track_filename:data.track_filename,
        track_custom_id:data.track_custom_id,
        track_artist:data.track_artist,
        track_genres:data.track_genres,
        track_isrc:data.track_isrc,
        track_pline:data.track_pline,
        track_territory_start_dates:data.track_territory_start_dates,
        track_explicit_lyrics:data.track_explicit_lyrics,
        filename:data.filename,
        custom_id:data.custom_id,
        isrc:data.isrc,
        upc:data.upc,
        grid:data.grid,
        song_title:data.song_title,
        artist:data.artist,
        album:data.album,
        genre:data.genre,
        label:data.label,
        original_release_date:data.original_release_date,
        match_policy:data.match_policy,
        ownership:data.ownership,
        admin_sync_rights:data.admin_sync_rights,
        comp_writers:data.comp_writers,
        comp_sync_ownership:data.comp_sync_ownership,
        type:data.type
        })
        
    })
    reader.addListener('end',function(){
        /*typecheck(silo,function(err,data){
            if(err) throw err;
            return cb(null,'something');
        })*/
        /*
        var type1 = new checker(silo[0].type)
        type1.typeswitch(silo,function(err,data){
            if(err) throw err;
            return cb(null,'something')
        })
    })*/
}

var checker = function(type){
    this.type = type;
}
checker.prototype.artcheck = function(c){
    console.log('in proto artcheck')
    return c(null,'good')
}
checker.prototype.contentcheck = function(c){
    console.log('in proto contentcheck')
    return c(null,'good')
}
checker.prototype.typeswitch = function(silo,c){
    switch(this.type){
        case "art_track":
            this.artcheck(function(err,data){
                if(err) throw err;
                return c(null,'good')
            })
            break;
        case "content_id":
            this.contentcheck(function(err,data){
                if(err) throw err;
                return c(null,'good')
            })
            break;
    }
}



//OLD CODE BLOCK
/*function typecheck(silo,c){
    switch (silo[0].type) {
        case "art_track":
            artcheck(function(err,data){
                if(err) throw err
                return c(null,'good')
            })
            break;
        case "content_id":
            contentcheck(function(err,data){
                if(err) throw err
                return c(null,'good')
            })
            break;
    }
    
    function artcheck(c){
        console.log('in artcheck')
        return c(null,'good')
    }
    function contentcheck(c){
        console.log('in contentcheck')
        return c(null,'good')
    }
    
}*/