use warnings;
use Carp;
+
+use base 'Class::Accessor::Grouped';
+
+__PACKAGE__->mk_group_accessors( simple => $_ ) for qw(
+ newline indent_string indent_amount colormap indentmap
+);
+
# Parser states for _recurse_parse()
use constant PARSE_TOP_LEVEL => 0;
use constant PARSE_IN_EXPR => 1;
sub _binary_op_keywords { @binary_op_keywords }
-sub new { bless sub {}, shift }
+my %indents = (
+ select => 0,
+ where => 1,
+ from => 1,
+ join => 1,
+ on => 2,
+ 'group by' => 1,
+);
+
+my %profiles = (
+ console => {
+ indent_string => ' ',
+ indent_amount => 2,
+ newline => "\n",
+ colormap => {},
+ indentmap => { %indents },
+ },
+ console_monochrome => {
+ indent_string => ' ',
+ indent_amount => 2,
+ newline => "\n",
+ colormap => {},
+ indentmap => { %indents },
+ },
+ html => {
+ indent_string => ' ',
+ indent_amount => 2,
+ newline => "<br />\n",
+ colormap => {
+ select => ['<span class="select">' , '</span>'],
+ where => ['<span class="where">' , '</span>'],
+ from => ['<span class="from">' , '</span>'],
+ join => ['<span class="join">' , '</span>'],
+ on => ['<span class="on">' , '</span>'],
+ 'group by' => ['<span class="group-by">', '</span>'],
+ },
+ indentmap => { %indents },
+ },
+ none => {
+ colormap => {},
+ indentmap => {},
+ },
+);
+
+eval {
+ require Term::ANSIColor;
+ $profiles{console}->{colormap} = {
+ select => [Term::ANSIColor::color('red'), Term::ANSIColor::color('reset')],
+ where => [Term::ANSIColor::color('green'), Term::ANSIColor::color('reset')],
+ from => [Term::ANSIColor::color('cyan'), Term::ANSIColor::color('reset')],
+ };
+};
+
+sub new {
+ my ($class, $args) = @_;
+
+ my $profile = delete $args->{profile} || 'none';
+ my $data = {%{$profiles{$profile}}, %{$args||{}}};
+
+ bless $data, $class
+}
sub parse {
my ($self, $s) = @_;
}
}
-use Term::ANSIColor 'color';
-
-my %ghetto_colormap = (
- select => [color('red'), color('reset')],
- where => [color('green'), color('reset')],
- from => [color('cyan'), color('reset')],
-);
-
sub format_keyword {
my ($self, $keyword) = @_;
- if (my $around = $ghetto_colormap{lc $keyword}) {
+ if (my $around = $self->colormap->{lc $keyword}) {
$keyword = "$around->[0]$keyword$around->[1]";
}
sub whitespace {
my ($self, $keyword, $depth) = @_;
- if (lc $keyword eq 'from') {
- return ['', "\n"];
+
+ my $before = '';
+ my $after = ' ';
+ if (defined $self->indentmap->{lc $keyword}) {
+ $before = $self->newline . $self->indent($depth + $self->indentmap->{lc $keyword});
}
- return ['', ''];
+ $before = '' if $depth == 0 and lc $keyword eq 'select';
+ return [$before, $after];
}
-sub newline { "\n" }
+sub indent { ($_[0]->indent_string||'') x ( ( $_[0]->indent_amount || 0 ) * $_[1] ) }
+
+sub _is_select {
+ my $tree = shift;
+ $tree = $tree->[0] while ref $tree;
-sub indent { ' ' x $_[1] }
+ defined $tree && lc $tree eq 'select';
+}
sub unparse {
my ($self, $tree, $depth) = @_;
- $depth ||= 1;
+ $depth ||= 0;
if (not $tree ) {
return '';
my $cdr = $tree->[1];
if (ref $car) {
- return join (" ", map $self->unparse($_), @$tree);
+ return join ('', map $self->unparse($_, $depth), @$tree);
}
elsif ($car eq 'LITERAL') {
return $cdr->[0];
}
elsif ($car eq 'PAREN') {
- return '(' . $self->newline .
+ return '(' .
join(' ',
- map $self->indent($depth) . $self->unparse($_, $depth + 1), @{$cdr})
- . $self->newline . ')';
+ map $self->unparse($_, $depth + 2), @{$cdr}) .
+ (_is_select($cdr)?( $self->newline||'' ).$self->indent($depth + 1):'') . ')';
}
elsif ($car eq 'OR' or $car eq 'AND' or (grep { $car =~ /^ $_ $/xi } @binary_op_keywords ) ) {
- return join (" $car ", map $self->unparse($_), @{$cdr});
+ return join (" $car ", map $self->unparse($_, $depth), @{$cdr});
}
else {
my ($l, $r) = @{$self->whitespace($car, $depth)};
- return sprintf "%s %s$r", $self->format_keyword($car), $self->unparse($cdr);
+ return sprintf "$l%s %s$r", $self->format_keyword($car), $self->unparse($cdr, $depth);
}
}
1;
+=pod
+
+=head1 SYNOPSIS
+
+ my $sqla_tree = SQL::Abstract::Tree->new({ profile => 'console' });
+
+ print $sqla_tree->format('SELECT * FROM foo WHERE foo.a > 2');
+
+ # SELECT *
+ # FROM foo
+ # WHERE foo.a > 2
+