def _inc_dec_tag(tag_name, add=True):
""" Increments or decrements the counter of a tag. """
if tag_name != None and len(tag_name) > 0:
if add:
debug("INC TAG USAGE: "+ tag_name)
db.zincrby(POPULAR_TAGS, tag_name, 1)
else:
debug("DEC TAG USAGE: "+ tag_name)
db.zincrby(POPULAR_TAGS, tag_name, -1)
# Delete the tag from the list if it has a score of 0
#if db.zrank(POPULAR_TAGS, tag_name) == 0:
if _alternative_score(tag_name) == 0:
# Delete from the specifig index of tag[0] -- tags
_delete_tag_index_letter_tags(tag_name)
# Delete from the index of tags if the tag is the last on index
num = get_tags_by_index_letter(tag_name[0])
if num != None and len(num) == 0:
_delete_symbol_index(tag_name[0])
db.zrem(POPULAR_TAGS, tag_name)
def delete_post(post_id, username):
"""
Deletes a post (as well as its related set of tags).
"""
debug("DELETE POST. username:"******",post:" + str(post_id))
post_id = str(post_id)
if _is_post_created(post_id):
# Delete each of the tags (to decrement the score in the ranking)
for temp_tag in get_post_tags(post_id):
delete_tag_from_post(post_id, temp_tag)
# Delete the set of tags that the post has
tags_id = db.hget(post_id + APPEND_KEY_POSTS, KEY_TAGS)
db.delete(tags_id + APPEND_KEY_TAG)
# Delete the counter of votes that the post has
votes_id = db.hget(post_id + APPEND_KEY_POSTS, KEY_VOTES)
db.delete(votes_id + APPEND_KEY_VOTE)
# Delete the post from the sorted set of posts by date
db.zrem(username + APPEND_SEARCH_POST_TIMEDATE, post_id)
# Delete the post id from the user's post list
# (1 is the number of items to be removed)
db.lrem(username + APPEND_KEY_POSTS, 1, post_id)
# Delete the post from the last updates
_delete_post_last_updates(post_id)
# Delete the post from the global ranking
db.zrem(POPULAR_TOP_POSTS, post_id)
# Delete the hash of the post
db.delete(post_id + APPEND_KEY_POSTS)
"""
db.hdel(post_id + APPEND_KEY_POSTS, KEY_TAGS)
db.hdel(post_id + APPEND_KEY_POSTS, KEY_TITLE)
db.hdel(post_id + APPEND_KEY_POSTS, KEY_DATE)
db.hdel(post_id + APPEND_KEY_POSTS, KEY_CONTENTS)
"""
return True
else:
return False
def _delete_tag_index_letter_tags(tag):
""" Deletes a tag from the index of tag[0] -- tags."""
db.zrem(tag[0].upper() + APPEND_KEY_INDEX_LETTER_TAG, tag)
