-- Interface of the server extension

CREATE OR REPLACE FUNCTION geocode_ip_point(user_id NAME, tx_id BIGINT, ip TEXT)
RETURNS Geometry AS $$
    plpy.debug('Entering _geocode_ip_point')
    plpy.debug('user_id = %s' % user_id)

    #-- Access control
    #-- TODO: this should be part of cdb python library
    if user_id == 'publicuser':
        plpy.error('The api_key must be provided')

    #--TODO: rate limiting check
    #--TODO: quota check

    #-- Copied from the doc, see http://www.postgresql.org/docs/9.4/static/plpython-database.html
    plan = plpy.prepare("SELECT cdb_geocoder_server._geocode_ip_point($1) AS point", ["TEXT"])
    rv = plpy.execute(plan, [ip], 1)

    plpy.debug('Returning from _geocode_ip_point')
    return rv[0]["point"]
$$ LANGUAGE plpythonu;


--------------------------------------------------------------------------------

-- Implementation of the server extension
-- Note: these functions depend on the cdb_geocoder extension
CREATE OR REPLACE FUNCTION _geocode_ip_point(ip TEXT)
RETURNS Geometry AS $$
  DECLARE
    ret Geometry;

    LIM INTEGER := 1;
  BEGIN
    SELECT ips.the_geom as geom INTO ret
      FROM public.ip_address_locations ips
        WHERE ips.network_start_ip = ip::inet
    LIMIT LIM;

    RETURN ret;
  END
$$ LANGUAGE plpgsql;
