The irresponsible guild proudly presents...
A tiny forms handling library.
First we need to define some validators and a function for validating our form.
validate_form(Data) ->
formica:validate(Data, #{<<"email">> => fun validate_email/1,
<<"password">> => fun validate_password/1}).
validate_email(U) ->
{ok, EmailReg} = re:compile("^[a-z0-9](\.?[a-z0-9_-]){0,}@[a-z0-9-]+\.([a-z]{1,6}\.)?[a-z]{2,6}$"),
case re:run(U, EmailReg) of
{match, _} -> {ok, U};
nomatch -> {error, "Email address has invalid format"}
end.
validate_password(P) when byte_size(P) >= 8 -> {ok, P};
validate_password(_) -> {error, "Passwords must be at least 8 characters long"}.Here are some example uses in the shell
%% Valid
1> validate_form([{<<"email">>, <<"a@example.net">>},
{<<"password">>, <<"password">>}]).
{ok, #{<<"email">> := <<"a@example.net">>,
<<"password">> := <<"password">>}}.
%% Invalid
2> validate_form([{<<"email">>, <<"a@example">>},
{<<"password">>, <<"pass">>}]).
{error, #{<<"email">> := "Email address has invalid format",
<<"password">> := "Passwords must be at least 8 characters long"}}.
%% Missing fields are returned as-is
3> validate_form([{<<"email">>, <<"a@example.com">>},
{<<"password">>, <<"password">>,},
{<<"name">>, <<"Ozzy Osbourne">>}]).
{ok, #{<<"email">> := <<"a@example.net">>,
<<"password">> := <<"password">>,
<<"name">> := <<"Ozzy Osbourne">>}}.$ rebar3 eunit
Copyright (c) 2017 Antonis Kalou <kalouantonis@protonmail.com>
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