import time
from django.template import Context, loader
from django.http import HttpResponse

#
# normally one would read and write the text from some sort of storage
# for this example we'll use a global variable to hold the content
#
DATA = []
for i in range(10):
    DATA.append( 'Entry number %d' % i )

def template(name, mimetype='text/html', **kwd):
    """Renders a template and wraps it as an http response"""
    templ = loader.get_template(name)
    page  = templ.render( Context(kwd) )
    return HttpResponse(page, mimetype=mimetype)

def param(request, name, default=''):
    """Shortcut for getting a parameter value"""
    return request.REQUEST.get(name, default).strip()

def index(request):
    """Main page"""
    global DATA
    
    mode = param(request, 'mode')
    if mode == 'proto':
        fname = 'proto-index.html'
    else:
        fname = 'mochi-index.html'

    return template(fname, text=DATA)

def save_text(request):
    """Saves text"""
    global DATA
    
    oid  = int( param(request, 'oid') )
    text = DATA[oid] = param(request, 'text')

    time.sleep(0.5) # artificial delay to show off the intermediate message
    return HttpResponse( text, mimetype="text/plain" )

def get_text(request):
    """Retrieves text"""
    global DATA
    
    oid  = int( param(request, 'oid') )
    text = DATA[oid] 
    
    time.sleep(0.5) # artificial delay to show off the intermediate message 
    return HttpResponse( text, mimetype="text/plain" )