witchie/toot/tui/utils.py

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import re
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import shutil
import subprocess
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from datetime import datetime, timezone
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HASHTAG_PATTERN = re.compile(r'(?<!\w)(#\w+)\b')
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def parse_datetime(value):
"""Returns an aware datetime in local timezone"""
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# In Python < 3.7, `%z` does not match `Z` offset
# https://docs.python.org/3.7/library/datetime.html#strftime-and-strptime-behavior
if value.endswith("Z"):
dttm = datetime.strptime(value, "%Y-%m-%dT%H:%M:%S.%fZ").replace(tzinfo=timezone.utc)
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else:
dttm = datetime.strptime(value, "%Y-%m-%dT%H:%M:%S.%f%z")
return dttm.astimezone()
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def highlight_keys(text, high_attr, low_attr=""):
"""
Takes a string and adds high_attr attribute to parts in square brackets,
and optionally low_attr attribute to parts outside square brackets.
The result can be rendered using a urwid.Text widget.
For example:
>>> highlight_keys("[P]rint [V]iew", "blue")
>>> [('blue', 'P'), 'rint ', ('blue', 'V'), 'iew']
"""
def _gen():
highlighted = False
for part in re.split("\\[|\\]", text):
if part:
if highlighted:
yield (high_attr, part) if high_attr else part
else:
yield (low_attr, part) if low_attr else part
highlighted = not highlighted
return list(_gen())
def highlight_hashtags(line, attr="hashtag"):
return [
(attr, p) if p.startswith("#") else p
for p in re.split(HASHTAG_PATTERN, line)
]
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def show_media(paths):
"""
Attempt to open an image viewer to show given media files.
FIXME: This is not very thought out, but works for me.
Once settings are implemented, add an option for the user to configure their
prefered media viewer.
"""
viewer = None
potential_viewers = [
"feh",
"eog",
"display"
]
for v in potential_viewers:
viewer = shutil.which(v)
if viewer:
break
if not viewer:
raise Exception("Cannot find an image viewer")
subprocess.run([viewer] + paths)