#
# Authors: Security Intelligence Team within the Security Coordination Center
#
# Copyright (c) 2018 Adobe Systems Incorporated. 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.
#

class Tokenizer:
    @staticmethod
    def tokenize(text, use_chars=False):
        if use_chars:
            return [ch for ch in text]
        else:
            toks = []
            tok = ''
            for ch in text:
                if not ch.isalnum() or ch == ' ':
                    tok = tok.strip()
                    if len(tok) != 0:
                        toks.append(tok)
                        tok = ''
                    if ch != ' ':
                        toks.append(ch)
                else:
                    tok += ch
            if tok.strip() != '':
                toks.append(tok)

            return toks
