Synnefo

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from dbworker import DBWorker

from pithos.backends.random_word import get_random_word

import logging

logger = logging.getLogger(__name__)

class Public(DBWorker):

    """Paths can be marked as public."""

    def __init__(self, **params):

        DBWorker.__init__(self, **params)

        execute = self.execute

        execute(""" create table if not exists public

                          ( public_id integer primary key autoincrement,

                            path      text not null,

                            active    boolean not null default 1,

                            url       text) """)

        execute(""" create unique index if not exists idx_public_path

                    on public(path) """)

        execute(""" create unique index if not exists idx_public_url

                    on public(url) """)

    def get_unique_url(self, public_url_security, public_url_alphabet):

        l = public_url_security

        while 1:

            candidate = get_random_word(length=l, alphabet=public_url_alphabet)

            if self.public_path(candidate) is None:

                return candidate

            l += 1

    def public_set(self, path, public_url_security, public_url_alphabet):

        q = "select public_id from public where path = ?"

        self.execute(q, (path,))

        row = self.fetchone()

        if not row:

            url = self.get_unique_url(

                public_url_security, public_url_alphabet

            )

            q = "insert into public(path, active, url) values(?, 1, ?)"

            self.execute(q, (path, url))

            logger.info('Public url set for path: %s' % path)

    def public_unset(self, path):

        q = "delete from public where path = ?"

        c = self.execute(q, (path,))

        if c.rowcount != 0:

            logger.info('Public url unset for path: %s' % path)

    def public_unset_bulk(self, paths):

        placeholders = ','.join('?' for path in paths)

        q = "delete from public where path in (%s)" % placeholders

        self.execute(q, paths)

    def public_get(self, path):

        q = "select url from public where path = ? and active = 1"

        self.execute(q, (path,))

        row = self.fetchone()

        if row:

            return row[0]

        return None

    def public_list(self, prefix):

        q = ("select path, url from public where "

             "path like ? escape '\\' and active = 1")

        self.execute(q, (self.escape_like(prefix) + '%',))

        return self.fetchall()

    def public_path(self, public):

        q = "select path from public where url = ? and active = 1"

        self.execute(q, (public,))

        row = self.fetchone()

        if row:

            return row[0]

        return None