wrolpi/modules/videos/test/test_common.py

import pathlib
import subprocess
import tempfile
from unittest import mock

import pytest
from PIL import Image

from modules.videos.models import Channel, Video
from wrolpi.common import get_absolute_media_path, get_wrolpi_config
from wrolpi.downloader import Download, DownloadFrequency
from wrolpi.files import lib as files_lib
from wrolpi.api_utils import api_app
from wrolpi.vars import PROJECT_DIR
from .. import common
from ..common import convert_image, update_view_counts, get_video_duration, generate_video_poster, is_valid_poster
from ..lib import save_channels_config, get_channels_config, import_channels_config


def test_get_absolute_media_path():
    path = get_absolute_media_path('videos')
    assert str(path).endswith('videos')


def test_get_video_duration(test_directory, corrupted_video_file):
    """
    Video duration can be retrieved from the video file.
    """
    video_path = PROJECT_DIR / 'test/big_buck_bunny_720p_1mb.mp4'
    assert get_video_duration(video_path) == 5

    with pytest.raises(FileNotFoundError):
        get_video_duration(PROJECT_DIR / 'test/does not exist.mp4')

    with pytest.raises(subprocess.CalledProcessError):
        empty_file = test_directory / 'empty.mp4'
        empty_file.touch()
        get_video_duration(empty_file)

    with pytest.raises(subprocess.CalledProcessError):
        get_video_duration(corrupted_video_file)


def test_convert_image():
    """
    An image's format can be changed.  This tests that convert_image() converts from a WEBP format, to a JPEG format.
    """
    foo = Image.new('RGB', (25, 25), color='grey')

    with tempfile.TemporaryDirectory() as tempdir:
        tempdir = pathlib.Path(tempdir)

        # Save the new image to "foo.webp".
        existing_path = tempdir / 'foo.webp'
        foo.save(existing_path)
        assert Image.open(existing_path).format == 'WEBP'

        destination_path = tempdir / 'foo.jpg'
        assert not destination_path.is_file()

        # Convert the WEBP to a JPEG.  The WEBP image should be removed.
        convert_image(existing_path, destination_path)
        assert not existing_path.is_file()
        assert destination_path.is_file()
        assert Image.open(destination_path).format == 'JPEG'


@pytest.mark.parametrize(
    'ext,expected',
    [
        ('jpg', True),
        ('jpeg', True),
        ('png', False),
        ('webp', False),
        ('tif', False),
    ]
)
def test_is_valid_poster(ext, expected, test_directory):
    foo = Image.new('RGB', (25, 25), color='blue')
    image_path = test_directory / f'image.{ext}'
    foo.save(image_path)
    assert is_valid_poster(image_path) == expected, f'is_valid_poster({image_path}) should be {expected}'


@pytest.mark.asyncio
async def test_update_view_count(test_session, channel_factory, video_factory):
    def check_view_counts(view_counts):
        for source_id, view_count in view_counts.items():
            video = test_session.query(Video).filter_by(source_id=source_id).one()
            assert video.view_count == view_count

    channel1, channel2, channel3 = channel_factory(), channel_factory(), channel_factory()
    video_factory(channel_id=channel1.id, with_poster_ext='jpg', title='vid1')
    video_factory(channel_id=channel2.id, title='vid2')
    video_factory(channel_id=channel3.id, with_poster_ext='jpg', title='vid3')
    video_factory(channel_id=channel3.id, title='vid4')
    channel1.info_json = {'entries': [{'id': 'vid1', 'view_count': 10}]}
    channel2.info_json = {'entries': [{'id': 'vid2', 'view_count': 11}, {'id': 'bad_id', 'view_count': 12}]}
    channel3.info_json = {'entries': [{'id': 'vid3', 'view_count': 13}, {'id': 'vid4', 'view_count': 14}]}
    test_session.commit()

    # Check all videos are empty.
    check_view_counts({'vid1': None, 'vid2': None, 'vid3': None, 'vid4': None})

    # Channel 1 is updated, the other channels are left alone.
    await update_view_counts(channel1.id)
    check_view_counts({'vid1': 10, 'vid2': None, 'vid3': None, 'vid4': None})

    # Channel 2 is updated, the other channels are left alone.  The 'bad_id' video is ignored.
    await update_view_counts(channel2.id)
    check_view_counts({'vid1': 10, 'vid2': 11, 'vid3': None, 'vid4': None})

    # All videos are updated.
    await update_view_counts(channel3.id)
    check_view_counts({'vid1': 10, 'vid2': 11, 'vid3': 13, 'vid4': 14})

    # An outdated view count will be overwritten.
    vid = test_session.query(Video).filter_by(id=1).one()
    vid.view_count = 8
    check_view_counts({'vid1': 8, 'vid2': 11, 'vid3': 13, 'vid4': 14})
    await update_view_counts(channel1.id)
    check_view_counts({'vid1': 10, 'vid2': 11, 'vid3': 13, 'vid4': 14})


def test_generate_video_poster(video_file):
    """
    A poster can be generated from a video file.
    """
    poster_path = video_file.with_suffix('.jpg')
    _, duration = generate_video_poster(video_file)
    assert poster_path.is_file(), f'{poster_path} was not created!'
    assert poster_path.stat().st_size > 0
    assert duration == 5


def test_import_channel_downloads(test_session, channel_factory, test_channels_config):
    """Importing the Channels' config should create any missing download records"""
    channel1 = channel_factory(source_id='foo')
    channel2 = channel_factory(source_id='bar')
    # channel2 has no url, but has a frequency.  Import should not create a download record.
    channel2.url = None
    channel2.download_frequency = DownloadFrequency.biweekly
    test_session.commit()
    assert channel1.download_frequency is None
    assert len(test_session.query(Channel).all()) == 2
    assert test_session.query(Download).all() == []

    def update_channel_config(conf, source_id, d):
        for c in conf.channels:
            if c['source_id'] == source_id:
                c.update(d)
        conf.save()

    # Config has no channels with a download_frequency.
    save_channels_config()
    import_channels_config()
    assert channel1.download_frequency is None
    assert len(test_session.query(Channel).all()) == 2
    assert test_session.query(Download).all() == []

    # Add a frequency to the Channel.
    channels_config = get_channels_config()
    update_channel_config(channels_config, 'foo', {'download_frequency': DownloadFrequency.biweekly})

    # Download record is created on import.
    import_channels_config()
    assert channel1.download_frequency is not None
    assert len(test_session.query(Channel).all()) == 2
    download: Download = test_session.query(Download).one()
    assert download.url == channel1.url
    assert download.frequency == channel1.download_frequency

    # Download frequency is adjusted when config file changes.
    update_channel_config(channels_config,
                          'foo', {'download_frequency': DownloadFrequency.weekly})
    import_channels_config()
    assert len(test_session.query(Channel).all()) == 2
    assert download.url == channel1.url
    assert download.frequency == channel1.download_frequency
    assert download.downloader == 'video_channel'
    assert download.next_download
    assert not download.error

    next_download = str(download.next_download)
    import_channels_config()
    download: Download = test_session.query(Download).one()
    assert next_download == str(download.next_download)


def test_import_channel_delete_missing_channels(test_session, channel_factory, test_channels_config):
    """The Channel import function deletes any Channels that are not in the config."""
    # Create a DB and config with two Channels.
    channel1 = channel_factory(source_id='foo')
    channel2 = channel_factory(source_id='bar')
    test_session.commit()
    # Write Channels to the config file.
    save_channels_config()
    test_session.delete(channel1)
    test_session.delete(channel2)
    test_session.commit()

    # Importing the config creates two Channels.
    import_channels_config()
    assert len(test_session.query(Channel).all()) == 2
    assert str(channel1.directory) in test_channels_config.read_text()
    assert str(channel2.directory) in test_channels_config.read_text()

    # Delete channel2 from the config file.
    config = get_channels_config()
    config_dict = config.dict()
    config_dict['channels'] = [i for i in config.channels if i['directory'] != str(channel2.directory)]
    config.update(config_dict)
    assert str(channel1.directory) in test_channels_config.read_text()
    assert str(channel2.directory) not in test_channels_config.read_text()

    # Importing the config deletes the Channel record.
    import_channels_config()
    assert len(test_session.query(Channel).all()) == 1
    assert str(channel1.directory) in test_channels_config.read_text()
    assert str(channel2.directory) not in test_channels_config.read_text()

    # Saving and importing does not change anything.
    save_channels_config()
    import_channels_config()
    assert str(channel1.directory) in test_channels_config.read_text()
    assert str(channel2.directory) not in test_channels_config.read_text()


def test_check_for_video_corruption(video_file, test_directory):
    # The test video is not corrupt.
    assert common.check_for_video_corruption(video_file) is False

    # An empty file is corrupt.
    empty_file = test_directory / 'empty file.mp4'
    empty_file.touch()
    assert common.check_for_video_corruption(empty_file) is True

    # A video file must be complete.
    truncated_video = test_directory / 'truncated_video.mp4'
    with truncated_video.open('wb') as fh:
        fh.write(video_file.read_bytes()[:10000])
    assert common.check_for_video_corruption(truncated_video) is True

    # Check for specific ffprobe errors.
    with mock.patch('modules.videos.common.subprocess') as mock_subprocess:
        # `video_file` is ignored for these calls.
        mock_subprocess.run().stderr = b'Something\nInvalid NAL unit size'
        assert common.check_for_video_corruption(video_file) is True
        mock_subprocess.run().stderr = b'Something\nError splitting the input into NAL units'
        assert common.check_for_video_corruption(video_file) is True
        mock_subprocess.run().stderr = b'Some stderr is fine'
        assert common.check_for_video_corruption(video_file) is False


@pytest.mark.asyncio
async def test_ffprobe_json(video_file, corrupted_video_file):
    content = await common.ffprobe_json(video_file)
    assert not content['chapters']
    assert content['format']['duration'] == '5.312000'
    assert content['format']['size'] == '1056318'
    assert content['streams']
    assert content['streams'][0]['codec_name'] == 'h264'

    with pytest.raises(RuntimeError):
        await common.ffprobe_json(corrupted_video_file)


@pytest.mark.asyncio
async def test_video_ffprobe_json(test_session, video_file):
    """ffprobe data is extracted when a video is modeled."""
    with mock.patch('modules.videos.lib.get_video_duration') as mock_get_video_duration:
        mock_get_video_duration.side_effect = Exception('duration should be from ffprobe json')
        await files_lib.refresh_files()

    video = test_session.query(Video).one()
    assert video.ffprobe_json
    assert video.file_group.length


def test_get_videos_directory(test_directory):
    """Default videos directory path"""
    # Directory does not yet exist.
    assert not (test_directory / 'videos').exists()

    # Directory is created when first gotten.
    assert common.get_videos_directory() == (test_directory / 'videos')
    assert (test_directory / 'videos').is_dir()


def test_get_custom_videos_directory(test_directory, test_config):
    """Custom directory can be used for videos directory."""
    config = get_wrolpi_config()
    config.videos_directory = 'custom/directory/videos'

    assert common.get_videos_directory() == (test_directory / 'custom/directory/videos')
    assert (test_directory / 'custom/directory/videos').is_dir()
    assert not (test_directory / 'videos').is_dir()