def is_tree_uptodate(cursor, tree_json, article_id, revision_id):
""" function returns true if tree stored in tree_json
was previous revision of an article with article_id and revision_id
"""
if tree_json == None:
return False
last_inserted_rev_id = TriesA5.get_last_revision_id(tree_json)
# getting id of previous revision
rev_parent_id = get_previous_revision_id(cursor, revision_id)
return rev_parent_id == last_inserted_rev_id
def fetch_new_revisions(cursor, tree_json, article_id):
""" function returns a list of id's of all revisions
which have not been added to the tree
"""
if tree_json == None:
last_inserted_rev_id = 0
else:
last_inserted_rev_id = TriesA5.get_last_revision_id(tree_json)
latest_revision_id = get_latest_revision_id(cursor, article_id)
# starting from the latest revision iterate down
# untill we get whether last inserted revision id or revision with id zero
all_rev_id = []
current_rev_id = latest_revision_id
while True:
if current_rev_id == 0 or current_rev_id == last_inserted_rev_id:
break
all_rev_id.append(current_rev_id)
current_rev_id = get_previous_revision_id(cursor, current_rev_id)
return all_rev_id