# Copyright 2020 Curtin University
#
# 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.

# Author: <NAME>

from subprocess import Popen
from typing import Tuple


def wait_for_process(proc: Popen) -> Tuple[str, str]:
    """ Wait for a process to finish, returning the std output and std error streams as strings.

    :param proc: the process object.
    :return: std output and std error streams as strings.
    """
    output, error = proc.communicate()
    output = output.decode('utf-8')
    error = error.decode('utf-8')
    return output, error


def stream_process(proc: Popen, debug: bool) -> Tuple[str, str]:
    """ Print output while a process is running, returning the std output and std error streams as strings.

    :param proc: the process object.
    :param debug: whether debug info should be displayed.
    :return: std output and std error streams as strings.
    """
    output_concat = ''
    error_concat = ''
    while True:
        for line in proc.stdout:
            output = line.decode('utf-8')
            if debug:
                print(output, end='')
            output_concat += output
        for line in proc.stderr:
            error = line.decode('utf-8')
            print(error, end='')
            error_concat += error
        if proc.poll() is not None:
            break
    return output_concat, error_concat

# Copyright 2020 Curtin University
#
# 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.

# Author: <NAME>

from subprocess import Popen
from typing import Tuple


def wait_for_process(proc: Popen) -> Tuple[str, str]:
    """ Wait for a process to finish, returning the std output and std error streams as strings.

    :param proc: the process object.
    :return: std output and std error streams as strings.
    """
    output, error = proc.communicate()
    output = output.decode('utf-8')
    error = error.decode('utf-8')
    return output, error


def stream_process(proc: Popen, debug: bool) -> Tuple[str, str]:
    """ Print output while a process is running, returning the std output and std error streams as strings.

    :param proc: the process object.
    :param debug: whether debug info should be displayed.
    :return: std output and std error streams as strings.
    """
    output_concat = ''
    error_concat = ''
    while True:
        for line in proc.stdout:
            output = line.decode('utf-8')
            if debug:
                print(output, end='')
            output_concat += output
        for line in proc.stderr:
            error = line.decode('utf-8')
            print(error, end='')
            error_concat += error
        if proc.poll() is not None:
            break
    return output_concat, error_concat

# Copyright 2020 Curtin University # # 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. # Author: <NAME> Wait for a process to finish, returning the std output and std error streams as strings.      :param proc: the process object.     :return: std output and std error streams as strings. Print output while a process is running, returning the std output and std error streams as strings.      :param proc: the process object.     :param debug: whether debug info should be displayed.     :return: std output and std error streams as strings.