use ID3FS::PathElement::File;
use ID3FS::PathElement::Tag;
use ID3FS::PathElement::Tagval;
+use ID3FS::Path::Node;
our ($STATE_INVALID, $STATE_ROOT, $STATE_TAG, $STATE_TAGVAL,
$STATE_BOOLEAN, $STATE_ALBUMS, $STATE_TRACKLIST,
- $STATE_FILE)=(0..7);
+ $STATE_FILE, $STATE_ALL)=(0..8);
+
+our %priorities=( "OR" => 0, "AND" => 1, "NOT" => 2 );
sub new
{
my $self={};
bless($self,$class);
+ $self->{elements}=[];
$self->{db}=shift;
$self->{path}=shift;
$self->parse();
my($self, $mountpoint)=@_;
if($self->state() == $STATE_FILE)
{
- return $self->{db}->filename($mountpoint, @{$self->{elements}});
+ return $self->filename($mountpoint, $self);
}
return "ERROR"; #should never happen?
}
{
my($self)=@_;
my @dents=();
+ my @fents=();
my $state=$self->state();
# print "DIRENTS: STATE: $state\n";
- if($state==$STATE_TAG || $state==$STATE_TAGVAL)
+# print "DIRENTS: FILE: $self->{path}\n";
+ if($state==$STATE_ALL)
{
- my $tag=$self->{elements}->[$#{$self->{elements}}];
+ push(@dents, qw(TRACKS NOARTIST), $self->artists());
+ }
+ elsif($state==$STATE_TAG || $state==$STATE_TAGVAL)
+ {
+ my $tag=$self->tail();
if($state==$STATE_TAG &&
defined($tag) &&
ref($tag) eq "ID3FS::PathElement::Tag" &&
$self->{db}->tag_has_values($tag->{id}))
{
- @dents=$self->{db}->tag_values($tag->{id});
+ @dents=$self->tags();
}
else
{
- @dents=(qw(AND OR TRACKS NOARTIST),
- $self->{db}->artists(@{$self->{elements}}));
+ push(@dents, qw(AND OR TRACKS NOARTIST), $self->artists());
}
}
elsif($state==$STATE_BOOLEAN)
{
- my $parent=$self->{elements}->[$#{$self->{elements}}];
+ my $parent=$self->tail();
unless(defined($parent) &&
ref($parent) eq "ID3FS::PathElement::Boolean" &&
$parent->{name} eq "NOT")
{
push(@dents, "NOT");
}
- push(@dents, $self->{db}->tags(@{$self->{elements}}));
+ push(@dents, $self->tags());
}
elsif($state==$STATE_ROOT)
{
- @dents=(qw(ALL NOT), $self->{db}->tags(@{$self->{elements}}));
+ @dents=(qw(ALL NOT), $self->tags());
}
elsif($state==$STATE_ALBUMS)
{
- @dents=(qw(TRACKS NOALBUM),$self->{db}->albums(@{$self->{elements}}));
+ @dents=(qw(TRACKS NOALBUM),$self->albums());
}
elsif($state==$STATE_TRACKLIST)
{
- @dents=$self->{db}->tracks(@{$self->{elements}});
+ @fents=$self->tracks();
}
else
{
print "DIRENTS: UNHANDLED STATE: $state\n";
}
- return(@dents);
+ return(\@dents, \@fents);
}
sub parse
my @parts=@{$self->{components}};
my($tag, $tagval);
$self->{elements}=[];
- while(my $name=shift @parts)
+ $self->{bare_not}=0;
+ $self->{in_all}=0;
+ my $root_not=0;
+ my $tags_seen=0;
+ while(defined(my $name=shift @parts))
{
# print "NAME: $name\n";
my $state=$self->state();
# print "SM: ROOT: $name\n";
if($name eq "ALL")
{
- $self->state($STATE_TAG);
+ $self->{in_all}=1;
+ $self->state($STATE_ALL);
}
elsif($name eq "NOT")
{
+ $root_not=1;
push(@{$self->{elements}}, ID3FS::PathElement::Boolean->new($self->{db}, $name));
$self->state($STATE_BOOLEAN);
}
if($tag)
{
push(@{$self->{elements}}, $tag);
+ $tags_seen++;
$self->state($STATE_TAG);
}
else
elsif($state==$STATE_TAG || $state==$STATE_TAGVAL)
{
# print "SM: TAG/TAGVAL($state): $name\n";
- my $tag=$self->{elements}->[$#{$self->{elements}}];
+ my $tag=$self->tail();
if($state==$STATE_TAG &&
defined($tag) &&
ref($tag) eq "ID3FS::PathElement::Tag" &&
$self->{db}->tag_has_values($tag->{id}))
{
- my $tagval=ID3FS::PathElement::Tagval->new($self->{db}, $name);
+# print "Parsing: parent: $tag->{id}\n";
+ my $tagval=ID3FS::PathElement::Tag->new($self->{db}, $name, $tag->{id});
if(defined($tagval))
{
$self->state($STATE_TAGVAL);
elsif($state==$STATE_BOOLEAN)
{
# print "SM: BOOLEAN: $name\n";
- my $parent=$self->{elements}->[$#{$self->{elements}}];
+ my $parent=$self->tail();
my $allownot=1;
if(defined($parent) &&
ref($parent) eq "ID3FS::PathElement::Boolean" &&
if($tag)
{
push(@{$self->{elements}}, $tag);
+ $tags_seen++;
$self->state($STATE_TAG);
}
else
# Can't have anything after a filename
$self->state($STATE_INVALID);
}
+ elsif($state==$STATE_ALL)
+ {
+ if($name eq "TRACKS")
+ {
+ $self->state($STATE_TRACKLIST);
+ }
+ elsif($name eq "NOARTIST")
+ {
+ $self->state($STATE_TRACKLIST);
+ }
+ else
+ {
+ my $artist=ID3FS::PathElement::Artist->new($self->{db}, $name);
+ if($artist)
+ {
+ push(@{$self->{elements}}, $artist);
+ $self->state($STATE_ALBUMS);
+ }
+ else
+ {
+ $self->state($STATE_INVALID);
+ }
+ }
+ }
else
{
print "SM: ERROR: UNKNOWN STATE: $self->{state}\n";
$self->state($STATE_INVALID);
}
}
+
+ if($root_not && ($tags_seen < 2))
+ {
+ $self->{bare_not}=1;
+ }
+
+ # remove trailing boolean
+ my @elements=@{$self->{elements}};
+ while(@elements && ref($elements[$#elements]) eq "ID3FS::PathElement::Boolean")
+ {
+ pop @elements;
+ }
+ # sort elements by precedence
+ @elements=$self->sort_elements(@elements);
+ $self->{tagtree}=$self->elements_to_tree(\@elements);
+ if($self->{tagtree})
+ {
+ ($self->{sqlconditions},
+ $self->{joins}) = $self->{tagtree}->to_sql();
+# print "TREE: ", $self->{tagtree}->print(), "\n";
+# print("SQL CONDITION(", scalar(@{$self->{joins}}), "): ",
+# $self->{sqlconditions}, "\n");
+# use Data::Dumper;
+# print Dumper $self->{tagtree};
+ }
}
sub state
return $self->{state};
}
+sub elements_to_tree
+{
+ my($self, $elements)=@_;
+ return undef unless(@$elements);
+ my ($left, $right, $op)=(undef, undef, undef);
+ my $thing=pop @$elements;
+ if(ref($thing) eq "ID3FS::PathElement::Boolean")
+ {
+ my $op=$thing;
+ $right=$self->elements_to_tree($elements);
+ if($op->{name} ne "NOT")
+ {
+ $left=$self->elements_to_tree($elements);
+ }
+ return ID3FS::Path::Node->new($left, $op, $right);
+ }
+ else
+ {
+ return ID3FS::Path::Node->new($thing);
+ }
+}
+
+# Dijkstra's shunting-yard algorithm
+sub sort_elements
+{
+ my ($self, @input)=@_;
+ my @opstack=();
+ my @output=();
+# print "INPUT: ", join(', ', map { $_->{name}; } @input), "\n";
+ while(my $thing = shift @input)
+ {
+ if(ref($thing) eq "ID3FS::PathElement::Tag")
+ {
+ # Handle tag values by dropping parent
+ if(@input && ref($input[0]) eq "ID3FS::PathElement::Tag")
+ {
+ $thing=shift @input;
+ }
+ push(@output, $thing);
+ }
+ elsif(ref($thing) eq "ID3FS::PathElement::Boolean")
+ {
+ # bool
+ while(@opstack &&
+ ($priorities{$thing->{name}} <= $priorities{$opstack[$#opstack]->{name}}))
+ {
+ push(@output, pop(@opstack));
+ }
+ push(@opstack, $thing);
+ }
+ }
+ while(@opstack)
+ {
+ push(@output, pop(@opstack));
+ }
+# print "STACK: ", join(', ', map { $_->{name}; } @output), "\n";
+ return @output;
+}
+
+sub used_tags
+{
+ my($self)=@_;
+ return() unless(defined($self->{tagtree}));
+ return($self->{tagtree}->used_tags());
+}
+
+sub tag_has_values
+{
+ my($self)=@_;
+ my $tail=$self->tail();
+ if($tail && ref($tail) eq "ID3FS::PathElement::Tag")
+ {
+ return($self->{db}->tag_has_values($tail->{id}));
+ }
+}
+
+sub trailing_tag_id
+{
+ my($self)=@_;
+ my $tail=$self->tail();
+ if($tail && ref($tail) eq "ID3FS::PathElement::Tag")
+ {
+ return($tail->{id});
+ }
+ return undef;
+}
+
+sub trailing_tag_parent
+{
+ my($self)=@_;
+ my $tail=$self->tail();
+ if($tail && ref($tail) eq "ID3FS::PathElement::Tag")
+ {
+ return($tail->{parents_id});
+ }
+ return undef;
+}
+
+sub tail
+{
+ my($self)=@_;
+ return($self->{elements}->[$#{$self->{elements}}]);
+}
+
+# the one before last
+sub tail_parent
+{
+ my($self)=@_;
+ return($self->{elements}->[($#{$self->{elements}}) - 1]);
+}
+
+######################################################################
+
+sub tags
+{
+ my($self)=@_;
+ if(!$self->{tagtree}) # / or /NOT # FIXME: /ALL too?
+ {
+ my $sql="SELECT DISTINCT name FROM tags WHERE parents_id='';";
+ return($self->{db}->cmd_firstcol($sql));
+ }
+ my $hasvals=$self->tag_has_values();
+ my $parent=$self->trailing_tag_parent();
+# print "THASVALS: $hasvals\n";
+# print "TPARENT: ", (defined($parent)? $parent : "NO"), "\n";
+ my @ids=();
+ my $sql=("SELECT tags.name FROM (\n" .
+ $self->tags_subselect() .
+ ") AS subselect\n" .
+ "INNER JOIN files_x_tags ON subselect.files_id=files_x_tags.files_id\n" .
+ "INNER JOIN tags ON files_x_tags.tags_id=tags.id\n");
+ my @allused=$self->used_tags();
+ my @used=grep { ref($_) ne "ARRAY"; } @allused;
+ my @used_with_vals=grep { ref($_) eq "ARRAY"; } @allused;
+# print "tags(): USED: ", join(", ", @used), "\n";
+# print "tags(): USED_WITH_VALS: ", join(", ", map { "[".$_->[0]. ", ".$_->[1]."]";} @used_with_vals), "\n";
+ my @orclauses=();
+ my @andclauses=();
+ my $id=$self->trailing_tag_id();
+ if($hasvals)
+ {
+# print "HAS_VALUES\n";
+ my @values=map { "'".$_->[1]."'"; } grep { $_->[0] == $id; } @used_with_vals;
+ my $clause="(tags.parents_id='$id'";
+ if(@values)
+ {
+ $clause .= " AND tags.id NOT IN (" . join(', ', @values) . ")";
+ }
+ $clause .= ")";
+ push(@andclauses, $clause);
+ }
+ else
+ {
+# print "HASNT VALUES\n";;
+ if(@used)
+ {
+ push(@andclauses, "(NOT (tags.parents_id='' AND tags.id IN (" . join(', ', @used) . ")))");
+ }
+ for my $pair (@used_with_vals)
+ {
+ push(@andclauses, "(NOT (tags.parents_id='" . $pair->[0] . "' AND tags.id='" . $pair->[1] . "'))");
+ }
+ }
+
+ my $parentclause= "(tags.parents_id='";
+ if($hasvals)
+ {
+ $parentclause .= $id;
+ }
+ elsif($parent)
+ {
+ $parentclause .= $parent;
+ }
+ $parentclause .= "')";
+ push(@andclauses, $parentclause);
+
+ if(@orclauses)
+ {
+ push(@andclauses, '( ' . join(' OR ', @orclauses) . ' )');
+ }
+ if(@andclauses)
+ {
+ $sql .= "WHERE " . join(' AND ', @andclauses) . "\n";
+ }
+ $sql .= "GROUP BY tags.name;";
+ print "SQL(TAGS): $sql\n";
+ my @tagnames=$self->{db}->cmd_firstcol($sql);
+ print "SUBNAMES: ", join(', ', @tagnames), "\n";
+ return(@tagnames);
+}
+
+sub tag_values
+{
+ my($self, $tagid)=@_;
+ my $sql=("SELECT DISTINCT name FROM tags\n" .
+ "WHERE parents_id=?");
+ my @tags=$self->{db}->cmd_firstcol($sql, $tagid);
+ @tags=map { length($_) ? $_ : "NOVALUE"; } @tags;
+ return @tags;
+}
+
+sub artists
+{
+ my($self)=@_;
+ if(!@{$self->{elements}}) # /ALL
+ {
+ my $sql="SELECT DISTINCT name FROM artists WHERE name!='';";
+ return($self->{db}->cmd_firstcol($sql));
+ }
+ my @ids=();
+ my $sql=("SELECT artists.name FROM (\n" .
+ $self->tags_subselect() .
+ ") AS subselect\n" .
+ "INNER JOIN files ON subselect.files_id=files.id\n" .
+ "INNER JOIN artists ON files.artists_id=artists.id\n" .
+ "WHERE artists.name != ''\n" .
+ "GROUP BY artists.name;");
+ print "SQL(ARTISTS): $sql\n";
+ my @tagnames=$self->{db}->cmd_firstcol($sql);
+ print "ARTISTS: ", join(', ', @tagnames), "\n";
+ return(@tagnames);
+}
+
+sub albums
+{
+ my($self)=@_;
+ my @ids=();
+ my $tail=$self->tail();
+ # FIXME: rework PathElements
+ if(ref($tail) eq "ID3FS::PathElement::Artist")
+ {
+ return $self->artist_albums($tail->{id});
+ }
+ my $sql;
+ if($self->{in_all})
+ {
+ $sql="SELECT name FROM albums";
+ }
+ else
+ {
+ $sql=("SELECT albums.name\n" .
+ "\tFROM (\n" .
+ $self->tags_subselect() .
+ "\t) AS subselect\n" .
+ "INNER JOIN files ON subselect.files_id=files.id\n" .
+ "INNER JOIN albums ON files.albums_id=albums.id\n" .
+ "WHERE albums.name != ''\n" .
+ "GROUP BY albums.name;");
+ }
+ print "SQL(ALBUMS): \n$sql\n";
+ my @names=$self->{db}->cmd_firstcol($sql);
+ print "ALBUMS: ", join(', ', @names), "\n";
+ return(@names);
+}
+
+sub artist_albums
+{
+ my($self, $artist_id)=@_;
+ my $sql="SELECT albums.name FROM ";
+ if($self->{in_all})
+ {
+ $sql .= "files\n";
+ }
+ else
+ {
+ $sql .= ("(\n" .
+ $self->tags_subselect() .
+ ") AS subselect\n" .
+ "INNER JOIN files ON subselect.files_id=files.id\n");
+ }
+ $sql .= ("INNER JOIN albums ON albums.id=files.albums_id\n" .
+ "INNER JOIN artists ON artists.id=files.artists_id\n" .
+ "WHERE artists.id=? and albums.name <> ''\n" .
+ "GROUP BY albums.name\n");
+ print "ARTIST_ALBUMS SQL: $sql\n";
+ my @albums=$self->{db}->cmd_firstcol($sql, $artist_id);
+ print "ALBUMS: ", join(', ', @albums), "\n";
+ return(@albums);
+}
+
+sub artist_tracks
+{
+ my($self, $artist_id)=@_;
+ my $sql="SELECT files.name FROM ";
+ if($self->{in_all})
+ {
+ $sql .= "files\n";
+ }
+ else
+ {
+ $sql .= ("(\n" .
+ $self->tags_subselect() .
+ "\t) AS subselect\n" .
+ "INNER JOIN files ON subselect.files_id=files.id\n");
+ }
+ $sql .= ("INNER JOIN artists ON artists.id=files.artists_id\n" .
+ "INNER JOIN albums ON albums.id=files.albums_id\n" .
+ "WHERE artists.id=? AND albums.name=''\n" .
+ "GROUP BY files.name\n");
+ print "ARTIST_TRACKS SQL: $sql\n";
+ my @names=$self->{db}->cmd_firstcol($sql, $artist_id);
+ print "ARTISTTRACKS: ", join(', ', @names), "\n";
+ return(@names);
+}
+
+sub album_tracks
+{
+ my($self, $artist_id, $album_id)=@_;
+ my $sql=("SELECT files.name FROM files\n" .
+ "INNER JOIN albums ON albums.id=files.albums_id\n" .
+ "INNER JOIN artists ON artists.id=files.artists_id\n" .
+ "WHERE artists.id=? AND albums.id=?\n" .
+ "GROUP BY files.name\n");
+ print "ALBUM_TRACKS SQL($artist_id, $album_id): $sql\n";
+ my @names=$self->{db}->cmd_firstcol($sql, $artist_id, $album_id);
+ print "TRACKS: ", join(', ', @names), "\n";
+ return(@names);
+}
+
+sub tracks
+{
+ my($self)=@_;
+ # FIXME: rework PathElements
+ my $tail=$self->tail();
+ if(ref($tail) eq "ID3FS::PathElement::Artist")
+ {
+ return $self->artist_tracks($tail->{id});
+ }
+ elsif(ref($tail) eq "ID3FS::PathElement::Album")
+ {
+ my $artist_id=0;
+ my $artist=$self->tail_parent();
+ if(defined($artist) && (ref($artist) eq "ID3FS::PathElement::Artist"))
+ {
+ # should always happen
+ $artist_id=$artist->{id};
+ }
+ return $self->album_tracks($artist_id, $tail->{id});
+ }
+ my $sql="SELECT files.name FROM ";
+ if($self->{in_all})
+ {
+ $sql .= "files\n";
+ }
+ else
+ {
+ $sql .= ("(\n" .
+ $self->tags_subselect() .
+ ") AS subselect\n" .
+ "INNER JOIN files ON files.id=subselect.files_id\n");
+ }
+ $sql .= "INNER JOIN artists ON files.artists_id=artists.id\n";
+ if($self->{components}->[$#{$self->{components}}] eq "NOARTIST")
+ {
+ $sql .= "WHERE artists.name =''\n";
+ }
+ $sql .= "GROUP BY files.name;";
+ print "TRACKS SQL($self->{path}): $sql\n";
+ my @names=$self->{db}->cmd_firstcol($sql);
+ print "TRACKS: ", join(', ', @names), "\n";
+ return(@names);
+}
+
+sub filename
+{
+ my($self, $mountpoint)=@_;
+ my $tail=$self->tail();
+ if(ref($tail) eq "ID3FS::PathElement::File")
+ {
+ my $id=$tail->{id};
+ my $sql=("SELECT paths.name, files.name FROM files\n" .
+ "INNER JOIN paths ON files.paths_id=paths.id\n" .
+ "WHERE files.id=?\n" .
+ "GROUP BY paths.name, files.name");
+ print "FILENAME SQL: $sql\n";
+ my ($path, $name)=$self->{db}->cmd_onerow($sql, $id);
+ my $id3fs_path=join('/', map { $_->{name}; } @{$self->{elements}});
+ return($self->{db}->relativise($path, $name, $mountpoint, $id3fs_path));
+ }
+ die("DB::filename: unhandled case\n"); #FIXME
+}
+
+sub tags_subselect
+{
+ my($self)=@_;
+ my $hasvals=$self->tag_has_values();
+ # we need to specially handle a bare /NOT/tag with no other clauses,
+ # using a simple WHERE id !='tagid' instead of a LEFT JOIN
+ if($self->{bare_not})
+ {
+ return $self->bare_not_subselect();
+ }
+ if($self->{in_all})
+ {
+ return "\tSELECT id FROM files AS files_id\n";
+ }
+ my $tree=$self->{tagtree};
+ my $parent=$self->trailing_tag_parent();
+
+# print "ELEMENTS: ", join('/', map { $_->{name}; } @{$self->{elements}}), "\n";
+# print "TREE: ", $tree->print(), "\n";
+ my $tag=undef;
+ if($hasvals)
+ {
+ $tag=$self->trailing_tag_id();
+# print "Trailing id: $tag\n";
+ }
+ my ($sqlclause, @joins)=(undef, ());
+ ($sqlclause, @joins) = $tree->to_sql() if($tree);
+# print "SQL(" . scalar(@joins) .": $sqlclause\n";
+ my $sql="\tSELECT fxt1.files_id FROM tags t1";
+ my @crosses=();
+ my @inners=();
+# $joinsneeded++ if($tag);
+ for(my $i=0; $i <= $#joins; $i++)
+ {
+ my $cnt=$i+1;
+ my $join=$joins[$i];
+ my $inner=("\t$join JOIN files_x_tags fxt$cnt ON " .
+ "t${cnt}.id=fxt${cnt}.tags_id");
+ if($i > 0)
+ {
+ push(@crosses, "CROSS JOIN tags t$cnt");
+ $inner .= " AND fxt1.files_id=fxt${cnt}.files_id";
+ }
+ push(@inners, $inner);
+ }
+ $sql .= ("\n\t" . join(" ", @crosses)) if(@crosses);
+ $sql .= ("\n" . join("\n", @inners)) if(@inners);
+ $sql .= "\n\tWHERE $sqlclause" if($sqlclause);
+# if($tag)
+# {
+# $sql .= " AND t${joinsneeded}.parents_id='$tag'";
+# }
+ $sql .= "\n\tGROUP BY fxt1.files_id\n";
+ return $sql;
+}
+
+sub bare_not_subselect
+{
+ my($self)=@_;
+ my @tags=grep { ref($_) eq "ID3FS::PathElement::Tag"; } @{$self->{elements}};
+ my $sql=("\tSELECT f1.id AS files_id FROM files f1 WHERE f1.id NOT IN (\n" .
+ "\t\tSELECT fxt1.files_id FROM tags t1\n" .
+ "\t\tINNER JOIN files_x_tags fxt1 ON t1.id=fxt1.tags_id\n" .
+ "\t\tWHERE ");
+ if(scalar(@tags) > 1)
+ {
+ $sql .= ("(t1.parents_id='" . $tags[0]->{id} . "' AND t1.id='" .
+ $tags[1]->{id} . "')");
+ }
+ else
+ {
+ $sql .= ("(t1.parents_id='' AND t1.id='" . $tags[0]->{id} . "')");
+ }
+ $sql .= "\n\t\tGROUP BY fxt1.files_id\n\t)\n";
+ return($sql);
+}
+
+sub tags_subselect_and_not
+{
+ my($self,@constraints)=@_;
+ my ($tags, $tags_vals, $parent)=$self->constraints_tag_list(@constraints);
+ my @tags=@$tags;
+ my @tags_vals=@$tags_vals;;
+ my $cnt=1;
+ my @andclauses=();
+ my $sql='';
+ for my $tag (@tags)
+ {
+ if($cnt == 1)
+ {
+ $sql="\tSELECT fxt" . scalar(@tags) . ".files_id FROM files_x_tags fxt1\n";
+ push(@andclauses, "\t\tfxt${cnt}.tags_id=$tag");
+ }
+ else
+ {
+ $sql .= ("\tLEFT JOIN files_x_tags fxt$cnt ON fxt" .
+ ($cnt-1) . ".files_id=fxt${cnt}.files_id\n");
+ push(@andclauses, "\t\tfxt${cnt}.tags_id IS NULL");
+ }
+ print "AND: @andclauses\n";
+ $cnt++;
+ }
+ if(@andclauses)
+ {
+ $sql .= "\tWHERE\n\t\t";
+ $sql .= join(" AND\n\t\t", @andclauses) . "\n";
+ }
+ $sql .= "\tGROUP BY fxt". scalar(@tags).".files_id\n";
+ return $sql;
+}
+
+
+sub tags_subselect_and
+{
+ my($self,@constraints)=@_;
+ my ($tags, $tags_vals, $parent)=$self->constraints_tag_list(@constraints);
+ my @tags=@$tags;
+ my @tags_vals=@$tags_vals;;
+ my $cnt=1;
+ my @andclauses=();
+ my $sql='';
+ for my $tag (@tags)
+ {
+ if($cnt == 1)
+ {
+ $sql="\tSELECT fxt" . scalar(@tags) . ".files_id FROM files_x_tags fxt1\n";
+ }
+ else
+ {
+ $sql .= ("\tINNER JOIN files_x_tags fxt$cnt ON fxt" .
+ ($cnt-1) . ".files_id=fxt${cnt}.files_id\n");
+ }
+ push(@andclauses, "\t\tfxt${cnt}.tags_id = $tag");
+ print "AND: @andclauses\n";
+ $cnt++;
+ }
+ if(@andclauses)
+ {
+ $sql .= "\tWHERE\n\t\t";
+ $sql .= join(" AND\n\t\t", @andclauses) . "\n";
+ }
+ $sql .= "\tGROUP BY fxt". scalar(@tags).".files_id\n";
+ return $sql;
+}
+
+sub tags_subselect_or
+{
+ my($self,@constraints)=@_;
+ my ($tags, $tags_vals, $parent)=$self->constraints_tag_list(@constraints);
+ my @tags=@$tags;
+ my @tags_vals=@$tags_vals;;
+
+ my $sql=("\tSELECT files_x_tags.files_id FROM tags t1\n" .
+ "\tINNER JOIN files_x_tags ON t1.id=files_x_tags.tags_id\n");
+ my @orclauses=();
+ my @andclauses=();
+ # FIXME: and / or?
+ if(@tags)
+ {
+ push(@andclauses, "( t1.parents_id=" . (defined($parent) ? $parent : "''") . " )");
+ push(@andclauses, "( t1.id IN ( " . join(', ', @tags) ." ) )");
+ }
+ for my $pair (@tags_vals)
+ {
+ my($tag, $val)=@$pair;
+ push(@orclauses, "( t1.parents_id=$tag AND t1.id=$val )");
+ }
+# push(@andclauses, "( t1.parents_id=" . (defined($parent) ? $parent : "''") . " )");
+ if(@orclauses)
+ {
+ push(@andclauses, join("\n\t\tOR ", @orclauses));
+ }
+ if(@andclauses)
+ {
+ $sql .= "\tWHERE\n\t\t";
+ $sql .= join("\n\t\tAND ", @andclauses) . "\n";
+ }
+ $sql .= "\tGROUP BY files_x_tags.files_id\n";
+ return $sql;
+}
+
+sub constraints_tag_list
+{
+ my($self, @constraints)=@_;
+ my $lasttag=undef;
+ my @tags=();
+ my @tags_vals=();
+ for my $constraint (@constraints)
+ {
+# print ref($constraint), ": ", $constraint->{name}, "\n";
+ if(ref($constraint) eq "ID3FS::PathElement::Tag")
+ {
+ if(defined($lasttag))
+ {
+# print "TAGVAL\n";
+ push(@tags_vals, [$lasttag, $constraint->{id}]) if defined($constraint->{id});
+ $lasttag=undef;
+ }
+ elsif($self->tag_has_values($constraint->{id}))
+ {
+# print "HASVALUES\n";
+ $lasttag=$constraint->{id} if defined($constraint->{id});
+ }
+ else
+ {
+# print "NOVALUES\n";
+ push(@tags, $constraint->{id}) if(defined($constraint->{id}));
+ }
+ }
+ }
+ unless($self->{db}->{postgres})
+ {
+ @tags=map{ "\"$_\""; } @tags;
+ @tags_vals=map( { [ map({ "\"$_\""; } @$_ ) ] } @tags_vals);
+ $lasttag="\"$lasttag\"" if defined($lasttag);
+ }
+ return(\@tags, \@tags_vals, $lasttag);
+}
+
+
+sub bare_tags
+{
+ my($self)=@_;
+ my $sql=("SELECT tags.name FROM tags\n" .
+ "WHERE tags.parents_id=''\n" .
+ "GROUP BY tags.name\n");
+ my @names=$self->{db}->cmd_firstcol($sql);
+ return (@names);
+}
+
+sub tags_with_values
+{
+ # FIXME: only shows one level of tag depth
+ my($self)=@_;
+ my $sql=("SELECT p.name, t.name FROM tags t\n" .
+ "INNER JOIN tags p ON t.parents_id=p.id\n" .
+ "GROUP BY p.name, t.name\n");
+ print "SQL: $sql\n";
+ my $result=$self->{db}->cmd_rows($sql);
+ my $tags={};
+ for my $pair (@$result)
+ {
+ push(@{$tags->{$pair->[0]}}, $pair->[1]);
+ }
+ return $tags;
+}
+
1;
projects / id3fs.git / blobdiff