import urllib.request
import urllib.parse
import json
from datetime import datetime


# REQUIRES: Etherpad API KEY stored in api.key

with open('api.key', 'r') as apikey_f:
    apikey = apikey_f.read()

pad_urlbase = "https://pad.xpub.nl/api/1/"  # xpub pad
pad_urlmethods = {"get": "getText",
                  "set": "setText",
                  "authors": "listAuthorsOfPad"}

# see more methods in: https://etherpad.org/doc/v1.5.7/#index_http_api


def createurl(urlbase, urlmethods, method, pad, key, text=''):
    # creates well formated urls
    # to query/edit the etherpad
    url_vars = {'apikey': key, 'padID': pad}
    if len(text) > 0:  # if no text is input
        url_vars['text'] = text
    url_vars_dict = urllib.parse.urlencode(url_vars)
    url = "{base}{method}?{vars}".format(base=urlbase,
                                         method=urlmethods[method],
                                         vars=url_vars_dict)
    return url


def padrequest(url):
    # upon being invoked opens the url
    # and loads the JSON response
    # returning the text
    request = urllib.request.urlopen(url)
    request_read = request.read().decode('utf-8')
    request_dict = json.loads(request_read)  # response to JSON dictionary
    return request_dict


# GET TEXT FROM PAD 
# from foo pad https://pad.xpub.nl/p/foo
# by creating url:
url = createurl(urlbase=pad_urlbase,
                urlmethods=pad_urlmethods,
                method='get',
                pad='foo',
                key=apikey)
response = padrequest(url) # requesting url and get response

print('----> get request', '\n',
      url, '\n',
      response['data']['text'])




# ADD TEXT TO THE PAD 
# to foo pad (https://pad.xpub.nl/p/foo)

now = datetime.now().strftime("%Y-%m-%d %H:%M:%S") # using current time
new_text = "this is now: " + now
# added old_text + new_text to
old_new_text = response['data']['text'] + '\n' + new_text

# by creating url: w/ set method and and text
url = createurl(urlbase=pad_urlbase,
                urlmethods=pad_urlmethods,
                method='set',
                pad='foo',
                key=apikey,
                text=old_new_text)

# create a request
response = padrequest(url)
print('----> set URL', '\n', url)