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Parameters.pm
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Parameters.pm
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package Mojo::Parameters;
use Mojo::Base -base;
use overload
'bool' => sub {1},
'""' => sub { shift->to_string },
fallback => 1;
use Mojo::Util qw(decode encode url_escape url_unescape);
has charset => 'UTF-8';
has pair_separator => '&';
sub new { shift->SUPER::new->parse(@_) }
sub append {
my ($self, @pairs) = @_;
my $params = $self->params;
for (my $i = 0; $i < @pairs; $i += 2) {
my $key = $pairs[$i] // '';
my $value = $pairs[$i + 1] // '';
# Single value
if (ref $value ne 'ARRAY') { push @$params, $key => $value }
# Multiple values
else { push @$params, $key => (defined $_ ? "$_" : '') for @$value }
}
return $self;
}
sub clone {
my $self = shift;
my $clone = Mojo::Parameters->new->pair_separator($self->pair_separator);
if (defined $self->{string}) { $clone->{string} = $self->{string} }
else { $clone->params([@{$self->params}]) }
return $clone;
}
sub merge {
my $self = shift;
push @{$self->params}, @{$_->params} for @_;
return $self;
}
sub param {
my ($self, $name) = (shift, shift);
# List names
return sort keys %{$self->to_hash} unless $name;
# Replace values
$self->remove($name) if defined $_[0];
$self->append($name, $_) for @_;
# List values
my @values;
my $params = $self->params;
for (my $i = 0; $i < @$params; $i += 2) {
push @values, $params->[$i + 1] if $params->[$i] eq $name;
}
return wantarray ? @values : $values[0];
}
sub params {
my $self = shift;
# Replace parameters
if (@_) {
$self->{params} = shift;
return $self;
}
# Parse string
if (defined(my $string = delete $self->{string})) {
my $params = $self->{params} = [];
# Detect pair separator for reconstruction
return $params unless length($string // '');
$self->pair_separator(';') if $string =~ /;/ && $string !~ /\&/;
# W3C suggests to also accept ";" as a separator
my $charset = $self->charset;
for my $pair (split /[\&\;]+/, $string) {
# Parse
$pair =~ /^([^=]*)(?:=(.*))?$/;
my $name = $1 // '';
my $value = $2 // '';
# Replace "+" with whitespace
s/\+/ /g for $name, $value;
# Unescape
$name = url_unescape $name;
$name = decode($charset, $name) // $name if $charset;
$value = url_unescape $value;
$value = decode($charset, $value) // $value if $charset;
push @$params, $name, $value;
}
}
return $self->{params} ||= [];
}
sub parse {
my $self = shift;
# Pairs
if (@_ > 1) { $self->append(@_) }
# String
else { $self->{string} = $_[0] }
return $self;
}
sub remove {
my $self = shift;
my $name = shift // '';
# Remove
my $params = $self->params;
for (my $i = 0; $i < @$params;) {
if ($params->[$i] eq $name) { splice @$params, $i, 2 }
else { $i += 2 }
}
return $self->params($params);
}
sub to_hash {
my $self = shift;
# Format
my $params = $self->params;
my %hash;
for (my $i = 0; $i < @$params; $i += 2) {
my ($name, $value) = @{$params}[$i, $i + 1];
# Array
if (exists $hash{$name}) {
$hash{$name} = [$hash{$name}] unless ref $hash{$name} eq 'ARRAY';
push @{$hash{$name}}, $value;
}
# String
else { $hash{$name} = $value }
}
return \%hash;
}
sub to_string {
my $self = shift;
# String
my $charset = $self->charset;
if (defined(my $string = $self->{string})) {
$string = encode $charset, $string if $charset;
return url_escape $string, '^A-Za-z0-9\-._~!$&\'()*+,;=%:@/?';
}
# Build pairs
my $params = $self->params;
return '' unless @$params;
my @pairs;
for (my $i = 0; $i < @$params; $i += 2) {
my ($name, $value) = @{$params}[$i, $i + 1];
# Escape and replace whitespace with "+"
$name = encode $charset, $name if $charset;
$name = url_escape $name, '^A-Za-z0-9\-._~!$\'()*,%:@/?';
$name =~ s/\%20/\+/g;
if ($value) {
$value = encode $charset, $value if $charset;
$value = url_escape $value, '^A-Za-z0-9\-._~!$\'()*,%:@/?';
$value =~ s/\%20/\+/g;
}
push @pairs, defined $value ? "$name=$value" : $name;
}
# Concatenate pairs
return join $self->pair_separator, @pairs;
}
1;
=head1 NAME
Mojo::Parameters - Parameters
=head1 SYNOPSIS
use Mojo::Parameters;
# Parse
my $p = Mojo::Parameters->new('foo=bar&baz=23');
say $p->param('baz');
# Build
my $p = Mojo::Parameters->new(foo => 'bar', baz => 23);
say "$p";
=head1 DESCRIPTION
L<Mojo::Parameters> is a container for form parameters.
=head1 ATTRIBUTES
L<Mojo::Parameters> implements the following attributes.
=head2 C<charset>
my $charset = $p->charset;
$p = $p->charset('UTF-8');
Charset used for encoding and decoding parameters, defaults to C<UTF-8>.
=head2 C<pair_separator>
my $separator = $p->pair_separator;
$p = $p->pair_separator(';');
Separator for parameter pairs, defaults to C<&>.
=head1 METHODS
L<Mojo::Parameters> inherits all methods from L<Mojo::Base> and implements the
following new ones.
=head2 C<new>
my $p = Mojo::Parameters->new;
my $p = Mojo::Parameters->new('foo=b%3Bar&baz=23');
my $p = Mojo::Parameters->new(foo => 'b;ar');
my $p = Mojo::Parameters->new(foo => ['ba;r', 'b;az']);
my $p = Mojo::Parameters->new(foo => ['ba;r', 'b;az'], bar => 23);
Construct a new L<Mojo::Parameters> object.
=head2 C<append>
$p = $p->append(foo => 'ba;r');
$p = $p->append(foo => ['ba;r', 'b;az']);
$p = $p->append(foo => ['ba;r', 'b;az'], bar => 23);
Append parameters.
# "foo=bar&foo=baz"
Mojo::Parameters->new('foo=bar')->append(foo => 'baz');
# "foo=bar&foo=baz&foo=yada"
Mojo::Parameters->new('foo=bar')->append(foo => ['baz', 'yada']);
# "foo=bar&foo=baz&foo=yada&bar=23"
Mojo::Parameters->new('foo=bar')->append(foo => ['baz', 'yada'], bar => 23);
=head2 C<clone>
my $p2 = $p->clone;
Clone parameters.
=head2 C<merge>
$p = $p->merge(Mojo::Parameters->new(foo => 'b;ar', baz => 23));
Merge L<Mojo::Parameters> objects.
=head2 C<param>
my @names = $p->param;
my $foo = $p->param('foo');
my @foo = $p->param('foo');
my $foo = $p->param(foo => 'ba;r');
my @foo = $p->param(foo => qw(ba;r ba;z));
Check and replace parameter values.
=head2 C<params>
my $params = $p->params;
$p = $p->params([foo => 'b;ar', baz => 23]);
Parsed parameters.
=head2 C<parse>
$p = $p->parse('foo=b%3Bar&baz=23');
Parse parameters.
=head2 C<remove>
$p = $p->remove('foo');
Remove parameters.
# "bar=yada"
Mojo::Parameters->new('foo=bar&foo=baz&bar=yada')->remove('foo');
=head2 C<to_hash>
my $hash = $p->to_hash;
Turn parameters into a hash reference.
# "baz"
Mojo::Parameters->new('foo=bar&foo=baz')->to_hash->{foo}[1];
=head2 C<to_string>
my $string = $p->to_string;
my $string = "$p";
Turn parameters into a string.
=head1 SEE ALSO
L<Mojolicious>, L<Mojolicious::Guides>, L<http://mojolicio.us>.
=cut