fix: Bug in parse_message

[moritzploss-k]

About

raven_error_logger is removed from the list of error_logger event listeners every time we hit this exception in kivra_core. What I can see in the kivra_core logs is something like this:

14:57:27.149 [error] Exception: {{throw,{error,timeout}},[{s2_maybe,unlift,1,[{file,"/build/kivra_core/_build/default/lib/stdlib2/src/s2_maybe.erl"},{line,93}]},{client_kampanha,access_token,3,[{file,"/build/kivra_core/src/kivra_client/client_kampanha.erl"},{line,101}]},{client_kampanha,get_content_campaigns,2,[{file,"/build/kivra_core/src/kivra_client/client_kampanha.erl"},{line,42}]},{active_content,overlay,6,[{file,"/build/kivra_core/src/kivra_core/active_content.erl"},{line,52}]},{rest_user_content_key_v2,get_content,1,[{file,"/build/kivra_core/src/rest/user/rest_user_content_key_v2.erl"},{line,93}]},{timer,tc,1,[{file,"timer.erl"},{line,166}]},{kivra_metrics,time_mfa,2,[{file,"/build/kivra_core/_build/default/lib/kivra_metrics/src/kivra_metrics.erl"},{line,43}]},{s2_maybe,lift,1,[{file,"/build/kivra_core/_build/default/lib/stdlib2/src/s2_maybe.erl"},{line,74}]}]}
14:57:27.149 [error] gen_event raven_error_logger installed in error_logger terminated with reason: {badarg,warning}

I think this is because the following line in raven_error_logger is not valid Erlang:

TheLevel = ExtrasLevel orelse Level

Since ExtrasLevel = warning in the case of the above exception, the above line boils down to something like this:

TheLevel = warning orelse error

which will throw an exception ** exception error: bad argument: warning since the term on the left side of orelse is not a boolean.

[maxno-kivra]

One comment about jsx, but otherwise this looks good. As the reviewer of the last PR I feel a little bit guilty. I really though orelse handled truthy values, and why we use it instead of or. You learn something everyday.

[zigge-zagge]

Thanks for cleaning up that bug I created in the last PR. Not sure where I got my inspiration from but I hope you had fun tracking it down 😄