fix: issue with incorrect conditions

[slavafyi]

Hi there! I found a problem here. We cannot use expressions in a variable declaration. For example, this was discussed here. So the variable should_redirect will always be truly except when template is not defined. Because should_redirect is equal to template in fact and will return a string.

Also when multiple conditions are used, the order works from right to left. I hope this makes sense. Thanks.

[slavafyi]

This also fixes #29, I guess :)