# -*- coding: utf-8 -*-

#

# Copyright 2017 Ricequant, Inc

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

# http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

import bcolz

import pandas as pd

from ..utils.py2 import lru_cache

class DividendStore(object):

def __init__(self, f):

self._table = bcolz.open(f, 'r')

self._index = self._table.attrs['line_map']

@lru_cache(128)

def get_dividend(self, order_book_id):

try:

s, e = self._index[order_book_id]

except KeyError:

return pd.DataFrame()

dividends = self._table[s:e]

return pd.DataFrame({

'book_closure_date': pd.Index(pd.Timestamp(str(d)) for d in dividends['closure_date']),

'ex_dividend_date': pd.Index(pd.Timestamp(str(d)) for d in dividends['ex_date']),

'payable_date': pd.Index(pd.Timestamp(str(d)) for d in dividends['payable_date']),

'dividend_cash_before_tax': dividends['cash_before_tax'] / 10000.0,

'round_lot': dividends['round_lot']

}, index=pd.Index(pd.Timestamp(str(d)) for d in dividends['announcement_date']))