#!/usr/bin/python3

import cgi, shelve, json, os, os.path
from PersistentDict import PersistentDict

form = cgi.FieldStorage()
session = form.getfirst('session')
shelfFileName = 'sessions/shelf.' + session
print("Content-type: application/json\n\n")
if os.path.exists(shelfFileName):
    try:
        #shelf = shelve.open(shelfFileName, 'r')
        #shelf = shelve.Shelf(PersistentDict(shelfFileName, 'r'))
        shelf = PersistentDict(shelfFileName, 'r')
        if ('redirect' in shelf['data']):
            status = {}
            status['status'] = ''
            status['redirect'] = True
            print(json.dumps(status))
        else:
            print(json.dumps(shelf['data']))
        removeShelf = ('done' in shelf['data'] and shelf['data']['done'])
        shelf.close()
        if removeShelf:
            os.remove(shelfFileName)
    except Exception as e:
        status = {}
        status['status'] = "Caught exception in getiTunesStatus: " + str(e)
        status['done'] = False
        print(json.dumps(status))
else:
    print('{"status": "Invalid session - try again.", "done": true}')