It all kinda depends-- most critically these days, on if Air Canada survives and when they recruit again. Also the fate of their A-319's is a big question, as there is talk about them being transfered to ZIP, and who will fly them after restructuring is complete (currently mainline pilots, but surprises have a way of popping up).
Having said all that, AC has in the past direct hired into the right seat of the 319's . . . all depends on what base, what the requirements are (whether there is a need or not), what senority number you are assigned during your new-hire class, and of course, what you bid. If you don't get onto the 319 initially, how long it takes to get onto that airplane depends on internal movement. It is entirely foolish to give a date on that. Case in point-- previously, Air Nova's time from FO Dash 8 to Captain was about a year. Now adays it is considered to be about 15 years-- but all of that could change tomorrow, of course!