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#!/usr/bin/python3
# coding=utf-8
import sys, json, sqlite3, psycopg2
sqc = None # sqlite3 connection handle
pgc = None # postgresql connection handle
def log(line):
sys.stdout.write('{0}\n'.format(line))
def _no_cleanup(row, data):
pass
def copy_table(src_qry, dst_qry, conversion_fn, cleanup_fn, sequence):
cleanup_fn = cleanup_fn or _no_cleanup
src_cur = sqc.cursor()
try:
dst_cur = pgc.cursor()
try:
row = None
for row in src_cur.execute(src_qry):
new_row, cleanup_data = conversion_fn(row)
dst_cur.execute(dst_qry, new_row)
cleanup_fn(new_row, cleanup_data)
if sequence and row:
dst_cur.execute("select setval('{0}', {1})".format(sequence, row[0]))
pgc.commit()
except:
pgc.rollback()
raise
finally:
dst_cur.close()
finally:
src_cur.close()
def convert_auth_user(row):
log('Converting auth_user id={0}'.format(row[0]))
return (row[0], row[1], row[2], row[3], row[4], row[5], row[6] != 0, row[7] != 0, row[8] != 0, row[9], row[10]), None
def _handle_trace_insert(trace, i):
length = (trace[i+2] << 8) + trace[i+3]
js = {
'typ': 'ins',
'off': (trace[i] << 8) + trace[i+1],
'txt': trace[i+4:i+4+length].decode()
}
return js, i + 4 + length
def _handle_trace_remove(trace, i):
js = {
'typ': 'rm',
'off': (trace[i] << 8) + trace[i+1],
'len': (trace[i+2] << 8) + trace[i+3]
}
return js, i + 4
def _handle_trace_solve(trace, i):
length = (trace[i] << 8) + trace[i+1]
js = {
'typ': 'slv',
'qry': trace[i+2:i+2+length].decode()
}
return js, i + 2 + length
def _handle_trace_solve_all(trace, i):
length = (trace[i] << 8) + trace[i+1]
js = {
'typ': 'slva',
'qry': trace[i+2:i+2+length].decode()
}
return js, i + 2 + length
def _handle_trace_test(trace, i):
js = {
'typ': 'tst',
'tot': trace[i],
'pas': trace[i+1]
}
return js, i + 2
def _handle_trace_next(trace, i):
return {'typ': 'nxt'}, i
def _handle_trace_stop(trace, i):
return {'typ': 'stp'}, i
def _handle_trace_hint(trace, i):
return {'typ': 'hnt'}, i
_trace_handler = {
1: _handle_trace_insert, # insert
2: _handle_trace_remove, # remove
3: _handle_trace_solve, # solve
4: _handle_trace_solve_all, # solve all
5: _handle_trace_next, # next solution
7: _handle_trace_stop, # stop/end
8: _handle_trace_test, # test
9: _handle_trace_hint # hint
}
def convert_trace(trace, i):
type = trace[i]
i += 1
dt = int(((trace[i] << 8) + (trace[i+1])) * 100.0)
i += 2
handler = _trace_handler.get(type)
if handler:
js, i = handler(trace, i)
js['dt'] = dt
return json.dumps(js), i
return None, i
def convert_attempt(row):
log('Converting tutor_attempt id={0}'.format(row[0]))
old_trace = bytes(row[5])
new_trace = []
n = len(old_trace)
i = 0
while i < n:
trace, i = convert_trace(old_trace, i)
if trace:
new_trace.append(trace)
return (row[0], row[1] != 0, row[2], row[3], row[4], '[' + ','.join(new_trace) + ']'), None
if __name__ == '__main__':
sqc = sqlite3.connect('db.sqlite3')
pgc = psycopg2.connect(host='localhost', port=5432, database='codeq', user='codeq', password='c0d3q')
pgc.autocommit = False
try:
log('Copying auth_user -> codeq_user')
copy_table(
'select id, username, password, first_name, last_name, email, is_superuser, is_staff, is_active, date_joined, last_login from auth_user order by id',
'insert into codeq_user (id, username, password, first_name, last_name, email, is_superuser, is_staff, is_active, date_joined, last_login) values (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s)',
convert_auth_user, None, 'codeq_user_id_seq')
log('Copying tutor_attempt -> solution')
copy_table(
'select id, done, content, problem_id, user_id, trace from tutor_attempt order by id',
'insert into solution (id, done, content, problem_id, codeq_user_id, trace) values (%s, %s, %s, %s, %s, %s)',
convert_attempt, None, 'solution_id_seq')
finally:
sqc.close()
pgc.close()
|
