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naive updated_epoch timestamp calculation added

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Kelly Brazil
2021-03-22 20:21:12 -07:00
parent 9dc62eff2e
commit d8e5d03b01
1 changed files with 20 additions and 33 deletions
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53
jc/parsers/upower.py
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@ -1,5 +1,7 @@
"""jc - JSON CLI output utility `upower` command output parser
Calculated epoch time fields are naive (i.e. based on the local time of the system the parser is run on) since there is no unambiguous timezone information in the `upower` command output.
Usage (cli):
$ upower -d | jc --upower
@ -125,8 +127,8 @@ Examples:
}
]
"""
# import locale
# from datetime import datetime, timezone
import locale
from datetime import datetime
import jc.utils
@ -165,6 +167,7 @@ def process(proc_data):
"native_path": string,
"power_supply": boolean,
"updated": string,
"updated_epoch": integer, # works best with C locale. null if conversion fails
"updated_seconds_ago": integer,
"has_history": boolean,
"has_statistics": boolean,
@ -223,38 +226,22 @@ def process(proc_data):
entry['updated'] = ' '.join(updated_list[:-3])
entry['updated_seconds_ago'] = int(updated_list[-3])
# Removing attempted epoch conversions since, depending on locale, timezone info may not be present in output.
# May investigate if there is a way to reliably convert the datetime string to an epoch timestamp
# if the timezone is present in a future release.
#
# If we assume current OS timezone, that works for interactive use: upower -d | jc --upower
#
# But, this wont necessarily convert timestamps correctly if converting text output sourced from another system:
# cat upower.out | jc --upower
#
# In this scenario, we don't always know what timezone was used on the source, so timestamp calculations will
# probably be wrong.
#
# try C locale. If that fails, try current locale. If that fails, give up
# entry['updated_epoch'] = None
# try:
# locale.setlocale(locale.LC_TIME, None)
# epoch_dt = datetime.strptime(entry['updated'], '%c').astimezone(tz=None)
# entry['updated_epoch'] = int(epoch_dt.strftime('%s'))
# entry['date_from_timestamp_local'] = datetime.fromtimestamp(entry['updated_epoch']).strftime('%c')
# entry['updated_epoch_utc'] = int(epoch_dt.replace(tzinfo=timezone.utc).strftime('%s'))
# entry['date_from_timestamp_utc'] = datetime.fromtimestamp(entry['updated_epoch_utc']).strftime('%c')
# except Exception:
# try:
# locale.setlocale(locale.LC_TIME, '')
# entry['updated_epoch'] = int(datetime.strptime(entry['updated'], '%c').astimezone(tz=timezone.utc).strftime('%s'))
# except Exception:
# pass
# finally:
# locale.setlocale(locale.LC_TIME, None)
# finally:
# locale.setlocale(locale.LC_TIME, None)
entry['updated_epoch'] = None
try:
locale.setlocale(locale.LC_TIME, None)
epoch_dt = datetime.strptime(entry['updated'], '%c')
entry['updated_epoch'] = int(epoch_dt.strftime('%s'))
except Exception:
try:
locale.setlocale(locale.LC_TIME, '')
entry['updated_epoch'] = int(epoch_dt.strftime('%s'))
except Exception:
pass
finally:
locale.setlocale(locale.LC_TIME, None)
finally:
locale.setlocale(locale.LC_TIME, None)
# top level boolean conversions
bool_list = ['power_supply', 'has_history', 'has_statistics', 'on_battery', 'lid_is_closed', 'lid_is_present']