#!/usr/bin/env python
# coding: utf-8
# Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
#
# 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 json
import chardet
import numpy as np

class MyEncoder(json.JSONEncoder):
    def default(self, obj):
        if isinstance(obj, np.integer):
            return int(obj)
        elif isinstance(obj, np.floating):
            return float(obj)
        elif isinstance(obj, np.ndarray):
            return obj.tolist()
        else:
            return super(MyEncoder, self).default(obj)
        
def is_pic(img_name):
    valid_suffix = ["JPEG", "jpeg", "JPG", "jpg", "BMP", "bmp", "PNG", "png"]
    suffix = img_name.split(".")[-1]
    if suffix not in valid_suffix:
        return False
    return True

def get_encoding(path):
    f = open(path, 'rb')
    data = f.read()
    file_encoding = chardet.detect(data).get('encoding')
    f.close()
    return file_encoding