82 lines
2.7 KiB
Perl
82 lines
2.7 KiB
Perl
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package DDG::Goodie::PeriodicTable;
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# ABSTRACT: Atomic masses and numbers for chemical elements
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use DDG::Goodie;
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use YAML::XS qw(Load);
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zci answer_type => 'periodic_table';
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zci is_cached => 1;
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name 'Periodic Table';
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description 'Atomic masses and numbers for chemical elements';
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primary_example_queries 'atomic mass of Nitrogen', 'atomic number of Oxygen';
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secondary_example_queries 'atomic weight of Na';
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category 'physical_properties';
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topics 'science';
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code_url 'https://github.com/duckduckgo/zeroclickinfo-goodies/blob/master/lib/DDG/Goodie/PeriodicTable.pm';
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attribution github => [ 'zblair', 'Zachary D Blair' ];
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my @elements = @{ Load( scalar share('elements.yml')->slurp ) };
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# Triggers
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triggers any => 'atomic mass', 'atomic weight', 'atomic number';
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# Handle statement
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handle query_lc => sub {
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my $query = $_;
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# Determine if this is a query for atomic mass or atomic number
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my $is_mass_query = $query =~ /atomic mass|atomic weight/;
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# Strip out irrelevant words in the query
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$query =~ s/(?:atomic (?:mass|weight|number)|of|the|element|elemental)//g;
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$query =~ s/^\s+|\s+$//g;
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return unless $query;
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# Look for a matching element in the table
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my $atomic_number;
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my $atomic_mass;
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my $element_name;
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my $element_symbol;
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ELEMENT_SEARCH: foreach my $element (@elements) {
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# Some elements have multiple names or symbols
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if ( ref $element->[2] ) {
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for my $idx ( 0 .. $#{ $element->[2] } ) {
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if ( lc $element->[2]->[$idx] eq $query || lc $element->[3]->[$idx] eq $query ) {
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$atomic_number = $element->[0];
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$atomic_mass = $element->[1];
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$element_name = $element->[2]->[$idx];
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$element_symbol = $element->[3]->[$idx];
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last ELEMENT_SEARCH;
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}
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}
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}
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elsif ( lc $element->[2] eq $query || lc $element->[3] eq $query ) {
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( $atomic_number, $atomic_mass, $element_name, $element_symbol ) = @{$element};
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last ELEMENT_SEARCH;
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}
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}
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return unless $atomic_number;
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# Return the result if the element was found
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if ($is_mass_query) {
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return "$element_name ($element_symbol), Atomic mass $atomic_mass u", structured_answer => {
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input => ["$element_name ($element_symbol)"],
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operation => 'atomic mass',
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result => "$atomic_mass u"
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};
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}
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else {
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return "$element_name ($element_symbol), Atomic number $atomic_number", structured_answer => {
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input => ["$element_name ($element_symbol)"],
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operation => 'atomic number',
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result => "$atomic_number"
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};
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}
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};
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1;
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