Add a new ROI

Description: Add a new ROI to dataset
URI: /datasets/ROI/<name>
http method: POST

@app.route('/datasets/ROI/<string:name>', methods=['POST'])
def insert_roi(name):
    if not request.json or 'range' not in request.json:
        return('',400)

    density = request.json.get('density',"NULL")
    score = request.json.get('score',"NULL")
    bound = request.json.get('range',"NULL")
    try:
        range = "BOX '"+str(bound['east'])+","+str(bound['north'])+","+str(bound['west'])+","+str(bound['south'])+"'" ##must
    except KeyError: 
        return('',400)

    cur = conn.cursor()
    query = "INSERT INTO roi."+name+"(density,score,range) VALUES ("+str(density)+","+str(score)+","+range+");"
    try: 
        cur.execute(query)
    except psycopg2.Error as e:
        conn.rollback()
        cur.close()
        return(e.pgerror,400)
    conn.commit()
    cur.close()

    return ('',200)