Add Raku solution for challenge-039-1

1 files changed, 76 insertions, 0 deletions

diff --git a/challenge-039/daniel-mita/perl6/ch-1.p6 b/challenge-039/daniel-mita/perl6/ch-1.p6
new file mode 100755
index 0000000000..c956e7a455
--- /dev/null
+++ b/challenge-039/daniel-mita/perl6/ch-1.p6
@@ -0,0 +1,76 @@
+#!/usr/bin/env perl6
+
+unit sub MAIN(
+  :$sleep where { \($_) ~~ &sleep.signature } = 0, #= Add a sleep to emulate time passing
+  Bool :$all-times, #= Print the times where nothing happens (recommended with --sleep)
+);
+
+constant @guest-list = (
+  { name => 'Alex',    in => '09:10', out => '09:45' },
+  { name => 'Arnold',  in => '09:15', out => '09:33' },
+  { name => 'Bob',     in => '09:22', out => '09:55' },
+  { name => 'Charlie', in => '09:25', out => '10:05' },
+  { name => 'Steve',   in => '09:33', out => '10:01' },
+  { name => 'Roger',   in => '09:44', out => '10:12' },
+  { name => 'David',   in => '09:57', out => '10:23' },
+  { name => 'Neil',    in => '10:01', out => '10:19' },
+  { name => 'Chris',   in => '10:10', out => '11:00' },
+);
+
+my Supplier $sign-in.=new;
+my Supplier $sign-out.=new;
+
+my Supplier $lightswitch.=new;
+my Bool $light;
+
+start react whenever $lightswitch.Supply {
+  "Light has been switched {$light.=not ?? 'on' !! 'off'}".say;
+}
+
+start react {
+  my %present is SetHash; # To contain @guest-list indexes
+
+  whenever $sign-in.Supply {
+    $lightswitch.emit(Nil) unless $light; # Pretty dark, let's hit the switch
+    %present{$_}++;
+    "@guest-list[$_]<name> has signed in".say;
+  }
+
+  whenever $sign-out.Supply {
+    %present{$_}--;
+    "@guest-list[$_]<name> has signed out".say;
+    if %present ~~ ∅ {
+      'Looks like nobody is here'.say;
+      $lightswitch.emit(Nil);
+    }
+    else {
+      say 'Leave light on for ' ~ %present.keys.map({ @guest-list[$_]<name> }).join(', ');
+    }
+  }
+}
+
+my $light-duration = 0;
+loop (
+  my $d = Date.today.DateTime.later(:9hours);
+  $d.hour < 11 || $d.minute == 0;
+  $d.=later(:1minute)
+) {
+  $light-duration++ if $light;
+
+  my $t = $d.hh-mm-ss.substr(0, *-3); # Don't care about seconds
+  my @in  = @guest-list.pairs.grep(*.value<in>  eq $t).map(*.key);
+  my @out = @guest-list.pairs.grep(*.value<out> eq $t).map(*.key);
+
+  if @in.elems || @out.elems {
+    "\n$t".say;
+    $sign-in.emit($_)  for @in;
+    $sign-out.emit($_) for @out;
+  }
+  elsif $all-times {
+    "\n$t: Nothing happened".say;
+  }
+
+  sleep $sleep;
+}
+
+"\nLight was on for $light-duration minutes".say;