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#!/usr/bin/python3
"""
Adds data about event distribution to the database,
and removes events not eligible for display
"""
# Code used in unit testing (for resolving imports of modules within this directory)
import os, sys
parentDir = os.path.dirname(os.path.realpath(__file__))
sys.path.append(parentDir)
# Standard imports
import argparse
import sqlite3
# Local imports
from cal import SCALES, dbDateToHistDate, dateToUnit
MAX_DISPLAYED_PER_UNIT = 4
DB_FILE = 'data.db'
def genData(dbFile: str, scales: list[int], maxDisplayedPerUnit: int) -> None:
dbCon = sqlite3.connect(dbFile)
dbCur = dbCon.cursor()
#
print('Reading through events')
scaleUnitToCounts: dict[tuple[int, int], list[int]] = {}
# Maps scale and unit to two counts (num events in that unit, num events displayable for that unit)
# Only includes events with popularity values
idScales: dict[int, list[tuple[int, int]]] = {} # Maps event ids to scales+units they are displayable on
iterNum = 0
query = 'SELECT events.id, start, fmt FROM events INNER JOIN pop ON events.id = pop.id ORDER BY pop.pop DESC'
for eventId, eventStart, fmt in dbCur.execute(query):
iterNum += 1
if iterNum % 1e5 == 0:
print(f'At iteration {iterNum}')
# For each scale
for scale in scales:
unit = dateToUnit(dbDateToHistDate(eventStart, fmt), scale)
# Update maps
counts: list[int]
if (scale, unit) in scaleUnitToCounts:
counts = scaleUnitToCounts[(scale, unit)]
counts[0] += 1
else:
counts = [1, 0]
if counts[1] < maxDisplayedPerUnit:
counts[1] += 1
if eventId not in idScales:
idScales[eventId] = []
idScales[eventId].append((scale, unit))
scaleUnitToCounts[(scale, unit)] = counts
print(f'Results: {len(idScales)} displayable events')
#
print('Looking for non-displayable events')
eventsToDel: list[int] = []
for eventId, eventStart, fmt in dbCur.execute(query):
if eventId in idScales:
continue
eventsToDel.append(eventId)
# Remove from data to be added to 'dist'
for scale in scales:
unit = dateToUnit(dbDateToHistDate(eventStart, fmt), scale)
count = scaleUnitToCounts[(scale, unit)][0] - 1
if count == 0:
del scaleUnitToCounts[(scale, unit)]
else:
scaleUnitToCounts[(scale, unit)][0] = count
for (eventId,) in dbCur.execute( # Find events without scores
'SELECT events.id FROM events LEFT JOIN pop ON events.id = pop.id WHERE pop.id IS NULL'):
eventsToDel.append(eventId)
print(f'Found {len(eventsToDel)}')
#
print(f'Deleting {len(eventsToDel)} events')
iterNum = 0
for eventId in eventsToDel:
iterNum += 1
if iterNum % 1e5 == 0:
print(f'At iteration {iterNum}')
#
dbCur.execute('DELETE FROM events WHERE id = ?', (eventId,))
dbCur.execute('DELETE FROM pop WHERE id = ?', (eventId,))
#
print('Writing to db')
dbCur.execute('CREATE TABLE dist (scale INT, unit INT, count INT, PRIMARY KEY (scale, unit))')
for (scale, unit), (count, _) in scaleUnitToCounts.items():
dbCur.execute('INSERT INTO dist VALUES (?, ?, ?)', (scale, unit, count))
dbCur.execute('CREATE TABLE event_disp (id INT, scale INT, unit INT, PRIMARY KEY (id, scale))')
dbCur.execute('CREATE INDEX event_disp_scale_unit_idx ON event_disp(scale, unit)')
for eventId, scaleUnits in idScales.items():
for [scale, unit] in scaleUnits:
dbCur.execute('INSERT INTO event_disp VALUES (?, ?, ?)', (eventId, scale, unit))
#
print('Closing db')
dbCon.commit()
dbCon.close()
if __name__ == '__main__':
parser = argparse.ArgumentParser(description=__doc__, formatter_class=argparse.RawDescriptionHelpFormatter)
args = parser.parse_args()
#
genData(DB_FILE, SCALES, MAX_DISPLAYED_PER_UNIT)
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