# Source code for synthetic.loader

#
#
# Copyright (c) 2016-2017 Junpei Kawamoto
#
# This file is part of rgmining-synthetic-dataset.
#
# rgmining-synthetic-dataset is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# rgmining-synthetic-dataset is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with rgmining-synthetic-dataset. If not, see <http://www.gnu.org/licenses/>.
#
"""Provide a loading method of synthetic dataset.
"""
from __future__ import division
from os import path

_REVIEWER_FILE = "reviewer.dat"
_PRODUCT_FILE = "product.dat"
_REVIEW_FILE = "review.dat"

def _fullpath(filename):
""" Compute the full path of a given filename.

Args:
filename: Filename.

Returns:
The full path of the given filename.
"""
return path.join(path.dirname(__file__), filename)

""" Load synthetic dataset.

Args:
g: an instance of bipartite graph.

Returns:
The graph instance *g*.
"""
R = {}  # Reviewers dict.
P = {}  # Products dict.

with open(_fullpath(_REVIEWER_FILE)) as fp:
for line in fp:
rid, name = line.strip().split(" ")
R[rid] = g.new_reviewer(name=name)

with open(_fullpath(_PRODUCT_FILE)) as fp:
for line in fp:
pid, name = line.strip().split(" ")
P[pid] = g.new_product(name=name)