78 lines
2.0 KiB
Python
78 lines
2.0 KiB
Python
from artemis.utils.constants import Query
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def format_frequency(freq_hz):
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""" Return frequency in a human-readable format
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Args:
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freq_hz (int): frequency in Hz
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"""
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scale = _change_unit_freq(freq_hz)
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formatted_freq = f'{freq_hz / scale[0]} {scale[1]}'
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return formatted_freq
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def _change_unit_freq(freq_hz):
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""" Return a scale factor and unit based on the number of digits in the frequency
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Args:
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freq_hz (int): frequency in Hz
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"""
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digits = len(str(freq_hz))
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if digits < 4:
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return 1, 'Hz'
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elif digits < 7:
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return 10**3, 'kHz'
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elif digits < 10:
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return 10**6, 'MHz'
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else:
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return 10**9, 'GHz'
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def generate_filter_query(filer_status):
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""" Returns the sql query according to the selected filter parameters
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Args:
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filer_status (dic): dictionary containing a summary of the active
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filtering options with the related parametes.
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"""
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query = []
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for key, val in filer_status.items():
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if key == 'frequency':
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query.append(Query.FILTER_FREQ.format(
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val['upper_band'],
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val['lower_band']
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))
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elif key == 'bandwidth':
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query.append(Query.FILTER_BAND.format(
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val['upper_band'],
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val['lower_band']
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))
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elif key == 'acf':
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query.append(Query.FILTER_ACF.format(
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val['upper_band'],
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val['lower_band']
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))
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elif key == 'modulation':
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query.append(Query.FILTER_MODULATION.format(
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', '.join(f"'{mod}'" for mod in val)
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))
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elif key == 'location':
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query.append(Query.FILTER_LOCATION.format(
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', '.join(f"'{loc}'" for loc in val)
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))
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elif key == 'category':
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query.append(Query.FILTER_CATEGORY.format(
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', '.join(f"{cat}" for cat in val)
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))
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return ' INTERSECT '.join(query)
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