use IdClass;
my IdClass() $id;
my \Id1 = id-class "Id1";
say my Str() $id1 = Id1.new;
$id = $id1;
say $id.^name;
class Id2 does IdClass["Id2"] {}
say my $id2 = Id2.new;
$id = $id2;
say $id.^name;
class Id3 does IdClass {
method prefix { "Id3" }
}
say my $id3 = Id3.new;
$id = $id3;
say $id.^name;
my %types;
my @default-chars = (|^10, |("A".."Z"), |("a".."z"));
unit role IdClass[Str $prefix = "", UInt $size = 40, @chars = @default-chars];
sub to-base64(Int() $int --> Str) {
my @use-chars = @chars.elems ?? @chars !! @default-chars;
@use-chars[$int.polymod(@use-chars.elems xx *).reverse].join;
}
sub ts {
my $ts = floor now * 1000000;
to-base64 $ts;
}
sub gen-id(UInt $size where $size > 1 = 30) {
my $id = @default-chars.roll($size).join;
$id
}
has Str $.prefix = $prefix;
has Str $.ts = ts;
has Str $.rest = gen-id(($size // 40) - 1 - $!ts.chars);
multi method Str(::?CLASS:D:) { "{$prefix}-{$!ts}-{$!rest}" }
multi method gist(::?CLASS:D:) { $.Str }
multi method COERCE(Str $id) {
if $id ~~ /^ (\w+) "-" (\w+) "-" (\w+) $/ {
return unless %types{~$0}:exists;
return %types{~$0}.new: :prefix(~$0), :ts(~$1), :rest(~$2)
}
die "'$id' is not a valid id"
}
multi method WHICH(::?CLASS:D:) { ValueObjAt.new: "{self.^name}|{self.Str}" }
multi method WHICH(::?CLASS:U:) { ValueObjAt.new: self.^name }
multi method export(IdClass:U \SELF where {.^name eq "IdClass"}:) {
Map.new: %types.values.map: {
.^name => .self
}
}
multi method export(IdClass:U:) {
Map.new: ($.^name => self)
}
sub id-class(Str $name, Str $prefix = $name, UInt $size?, @chars?) is export {
my \id-class-type = Metamodel::ClassHOW.new_type: :$name;
id-class-type.^add_role: IdClass[$prefix, $size, @chars];
id-class-type.^compose;
%types{$prefix} := id-class-type;
# CALLER::PACKAGE::{$name} := id-class-type;
return id-class-type
}
