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optionally get name history rows in reverse

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This commit is contained in:
Jude Nelson
2018-06-20 11:44:29 -04:00
parent b73d508c06
commit 2293512f83
1 changed files with 8 additions and 5 deletions
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13
blockstack/lib/nameset/db.py
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@@ -1264,13 +1264,17 @@ def namedb_history_save( cur, opcode, history_id, creator_address, value_hash, b
return True
def namedb_get_history_rows( cur, history_id, offset=None, count=None ):
def namedb_get_history_rows( cur, history_id, offset=None, count=None, reverse=False ):
"""
Get the history for a name or namespace from the history table.
Use offset/count if given.
"""
ret = []
select_query = "SELECT * FROM history WHERE history_id = ? ORDER BY block_id ASC, vtxindex ASC"
if not reverse:
select_query = "SELECT * FROM history WHERE history_id = ? ORDER BY block_id ASC, vtxindex ASC"
else:
select_query = "SELECT * FROM history WHERE history_id = ? ORDER BY block_id DESC, vtxindex DESC"
args = (history_id,)
if count is not None:
@@ -1304,14 +1308,13 @@ def namedb_get_num_history_rows( cur, history_id ):
return count
def namedb_get_history( cur, history_id ):
def namedb_get_history( cur, history_id, offset=None, count=None, reverse=False ):
"""
Get all of the history for a name or namespace.
Returns a dict keyed by block heights, paired to lists of changes (see namedb_history_extract)
"""
# get history in increasing order by block_id and then vtxindex
history_rows = namedb_get_history_rows( cur, history_id )
history_rows = namedb_get_history_rows( cur, history_id, offset=offset, count=count, reverse=reverse )
return namedb_history_extract( history_rows )