Taskenizer

- make sure it doesn't try to start if it's already started
- make sure it doesn't try to stop if it's not running
- make sure it doesn't try to restart if it's not running

- make sure it checks it has read-write access to shmdir and
  user_locks before it starts

- make sure it doesn't try to start if it's already started
- make sure it doesn't try to stop if it's not running
- make sure it doesn't try to restart if it's not running

- make sure it checks it has read-write access to shmdir and
  user_locks before it starts

- make cat shared between 2 users
- user b adds note
- user a moves that note into a non-shared category
- user a defers it
- does it come undeferred again?

    return next_nix_secs - userdiff


def un_defer_any(conn, cat_id, cur_time, user_id, foo_timezone, task_type):
    '''Will un-defer any due deferred tasks in that category. Will be
    run before displaying a category.'''

    tup = (cat_id, user_id)

    if task_type == 0:
        cat_type = 'Note'
    if task_type == 1:
        cat_type = 'AutoHabit'
    if task_type == 2:
        cat_type = 'ManuHabit'

    # Get all deferred tasks in this category
    conn.execute('''SELECT id, def_days, def_months,
                 def_years
                 FROM %s
                 WHERE cat_id = %%s
                 AND user_id = %%s
                 AND deferred = 1;''' % cat_type, tup)
    def_tasks = conn.fetchall()

    for task in def_tasks:
        tasid = task[0]
        days = task[1]
        months = task[2]
        years = task[3]

        time_due = when_due(cur_time, foo_timezone, days, months, years)

        # If that's before now, un-defer it
        if time_due <= cur_time:
            tup = (tasid, user_id)

            # Note that it doesn't clear the `next_days',
            # `next_months' etc values.
            conn.execute('''UPDATE %s SET deferred = 0
                         WHERE id = %%s
                         AND user_id = %%s''' % cat_type, tup)


def cookie_auth(cook):
    """Checks for three auth cookies. If all of them are present, returns them.

    The first element of the tuple is always 0 for all cookies found or 1 otherwize.
    """

    return next_nix_secs - userdiff


def un_defer_any(conn, cat_id, cur_time, user_id, foo_timezone, task_type):
    '''Will un-defer any due deferred tasks in that category. Will be
    run before displaying a category.'''

    tup = (cat_id,)

    if task_type == 0:
        cat_type = 'Note'
    if task_type == 1:
        cat_type = 'AutoHabit'
    if task_type == 2:
        cat_type = 'ManuHabit'

    # Get all deferred tasks in this category
    conn.execute('''SELECT id, def_days, def_months,
                 def_years
                 FROM %s
                 WHERE cat_id = %%s

                 AND deferred = 1;''' % cat_type, tup)
    def_tasks = conn.fetchall()

    for task in def_tasks:
        tasid = task[0]
        days = task[1]
        months = task[2]
        years = task[3]

        time_due = when_due(cur_time, foo_timezone, days, months, years)

        # If that's before now, un-defer it
        if time_due <= cur_time:
            tup = (tasid,)

            # Note that it doesn't clear the `next_days',
            # `next_months' etc values.
            conn.execute('''UPDATE %s SET deferred = 0

                         WHERE id = %%s''' % cat_type, tup)


def cookie_auth(cook):
    """Checks for three auth cookies. If all of them are present, returns them.

    The first element of the tuple is always 0 for all cookies found or 1 otherwize.
    """