Viewing file:  paging.py (1.18 KB) -rw-r--r--
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from flask_restful.utils.crypto import decrypt, encrypt
DEFAULT_PAGE_SIZE = 50
def retrieve_next_page(key, seed, args, callback, initial_bookmark=None):
"""
A helper for the bookmark pager.
:param key: the private key of you API
:param seed: the crypo seed for this session
:param args: the verbatim filtering+paging arguments
:param callback: a function that takes (a dictionary of filters, the current bookmark, the page size)
and return a tuple (next_results, dictionary_ready_for_next_iteration, approx_number_of_element_left)
:param initial_bookmark: pass here an optional initial bookmark for the first request
:return: the tuple result_list and new encrypted bookmark
"""
filter = dict(args)
if 'pager_info' in filter:
initial_bookmark = decrypt(filter.pop('pager_info'), key, seed)
page_size = filter.pop('page_size', DEFAULT_PAGE_SIZE)
result_list, new_bookmark, approx_result_size = callback(filter, initial_bookmark, page_size)
# restore for the next iteration
filter['pager_info'] = encrypt(new_bookmark, key, seed)
filter['page_size'] = page_size
return result_list, filter, approx_result_size
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