forked from trombonehero/secconfdb
/
db.py
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db.py
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import datetime
import re
import MySQLdb
from query import Select, Update, Insert, Tables, Fields, Values, Filter, Order
def cursor(database = 'secconfdb', username = 'secconfdb', password = ''):
try:
connection = MySQLdb.connect(
host = 'localhost', db = database, user = username, passwd = password)
connection.cursor().execute("""
SET NAMES utf8;
SET CHARACTER SET utf8;
SET character_set_connection=utf8;
""")
return connection.cursor()
except MySQLdb.OperationalError, (errno, message):
if errno in (1044, 1045, 1142): raise UnauthorizedAccessException(message)
else: raise
def get_tags(names = None, ids = None):
where = Filter(None)
if names is not None:
where = Filter("name in ('%s')" % "','".join(names))
if type(ids) == str:
ids = [ str(int(x)) for x in ids.split(',') ]
if ids is not None:
where = Filter("tag in (%s)" % ','.join(ids))
query = Select(
fields = Fields([ 'tag', 'name' ]),
source = Tables('Tags'),
filter = where,
order = Order('name'))
results = query.execute(cursor())
return [ (i.tag, i.name) for i in results ]
def deadlines(tags = []):
query = Select(
filter = Filter.upcomingDeadlines() & Filter.tags(tags),
order = Order.deadline())
return query.execute(cursor())
def upcoming(tags = []):
query = Select(
filter = Filter.upcoming() & Filter.tags(tags),
order = Order.start_date())
return query.execute(cursor())
def recent(tags = []):
query = Select(
filter = Filter.recent() & Filter.tags(tags),
order = Order.start_date(reverse = True))
return query.execute(cursor())
def locations():
return Select(
source = Tables.locations(),
fields = Fields.locations(),
filter = Filter(None),
order = Order.locations()
).execute(cursor())
def meeting_types():
return Select(
source = Tables('MeetingTypes'),
fields = Fields.meeting_types(),
filter = Filter(None),
order = Order(None),
).execute(cursor())
def most_recent():
return Select(
fields = Fields.events(),
source = Tables.events(),
filter = Filter("""
startDate = (
select max(startDate) from ConferenceInstances AS ci
where ci.conference = ConferenceInstances.conference)
"""),
order = Order("startDate"),
).execute(cursor())
def conferences():
return Select(
fields = Fields.conference(),
source = Tables.conference(),
filter = Filter(None),
order = Order("abbreviation"),
).execute(cursor())
def conference(id = None, abbreviation = None):
assert (id is not None) ^ (abbreviation is not None)
filter = None
if id is not None: filter = Filter("conference = %d" % id)
else: filter = Filter("abbreviation = '%s'" % abbreviation)
c = cursor()
conferences = Select(
fields = Fields.conference(),
source = Tables.conference(),
filter = filter,
order = Order(None),
).execute(c)
if len(conferences) == 0: return None
else: return conferences[0].__dict__
def conference_events(id = None, abbreviation = None):
conf = conference(id, abbreviation)
if conf['parent']:
conf['parent'] = conference(id = int(conf['parent']))
if conf['tags'] and len(conf['tags']) > 0:
conf['tags'] = [
name for (id, name) in get_tags(ids = conf['tags'].split(',')) ]
else:
conf['tags'] = []
events = Select(
filter = Filter('conference = %d' % conf['conference']),
order = Order.start_date(reverse = True),
).execute(cursor())
return (conf, events)
class UnauthorizedAccessException(Exception):
def __init__(*args):
Exception.__init__(*args)
def update(table_name, key, values, credentials):
query = Update(
table = Tables(table_name, use_from = False),
values = Values('SET', values),
filter = Filter("%s = %d" % key)
)
try: query.execute(cursor(**credentials))
except MySQLdb.OperationalError, (errno, text):
if errno == 1142: raise UnauthorizedAccessException(text)
else: raise
def create(table_name, values, credentials):
query = Insert(
table = Tables(table_name, use_from = False),
fields = Fields(values.keys()),
values = Values('VALUES', values),
)
try: query.execute(cursor(**credentials))
except MySQLdb.OperationalError, (errno, text):
if errno == 1142: raise UnauthorizedAccessException(text)
else: raise
def get(table_name):
return Select(
source = Tables(table_name),
fields = Fields('*'),
filter = Filter(None),
order = Order(None),
).execute(cursor())