lib/MojoFacets/Data.pm

   1 package MojoFacets::Data;
   2
   3 use strict;
   4 use warnings;
   5
   6 use base 'Mojolicious::Controller';
   7
   8 use Data::Dump qw(dump);
   9 use File::Slurp;
  10 use JSON;
  11 use Encode;
  12 use locale;
  13 use File::Find;
  14 use Storable;
  15
  16 our $loaded;
  17 our $filters;
  18
  19 sub index {
  20         my $self = shift;
  21
  22         my $path = $self->app->home->rel_dir('data');
  23         die "no data dir $path" unless -d $path;
  24
  25         my @files;
  26         find( sub {
  27                 my $file = $File::Find::name;
  28                 if ( -f $file && $file =~ m/\.(js(on)?|txt)$/ ) {
  29                         $file =~ s/$path\/*//;
  30                         push @files, $file;
  31                 } else {
  32                         warn "IGNORE: $file\n";
  33                 }
  34         }, $path);
  35
  36         @files = sort { lc $a cmp lc $b } @files;
  37         my $size;
  38         $size->{$_} = -s "$path/$_" foreach @files;
  39
  40         my $dump_path;
  41         $dump_path->{$_} = $self->_dump_path( $_ ) foreach @files;
  42
  43         if ( my $save_path = $self->session('save_path') ) {
  44                 $self->session( 'save_path' => 0 )
  45                 if ! defined $loaded->{$save_path};
  46         }
  47
  48         $self->render(
  49                 files => [ @files ],
  50                 size => $size,
  51                 loaded => $loaded,
  52                 filters => $filters,
  53                 dump_path => $dump_path,
  54         );
  55 }
  56
  57 sub _dump_path {
  58         my ( $self, $name ) = @_;
  59         my $dir = $self->app->home->rel_dir('data');
  60         $name =~ s/^$dir//;
  61         $name =~ s/\/+/_/g;
  62         return '/tmp/mojo_facets.' . $name . '.storable';
  63 }
  64
  65 sub _save {
  66         my ( $self, $path ) = @_;
  67
  68         my $dump_path = $self->_dump_path( $path );
  69         warn "save loaded to $dump_path";
  70         my $info = $loaded->{$path};
  71         store $info, $dump_path;
  72
  73         # sync timestamp
  74         my $mtime = $loaded->{$path}->{mtime};
  75         utime $mtime, $mtime, $dump_path;
  76
  77         warn $dump_path, ' ', -s $dump_path, " bytes\n";
  78         return $dump_path;
  79 }
  80
  81 sub _load_path {
  82         my ( $self, $path ) = @_;
  83
  84         my $full_path = $self->app->home->rel_file( 'data/' . $path );
  85         die "$full_path $!" unless -r $full_path;
  86
  87         my $dump_path = $self->_dump_path( $path );
  88
  89         if ( defined $loaded->{$path}->{data} ) {
  90                 my $mtime = (stat($full_path))[9];
  91                 return if $loaded->{$path}->{mtime} == $mtime;
  92                 warn "reload $full_path, modified ", time() - $mtime, " seconds ago\n";
  93         } elsif ( -e $dump_path ) {
  94                 warn "dump_path $dump_path ", -s $dump_path, " bytes loading...\n";
  95                 my $info = retrieve $dump_path;
  96                 $loaded->{ $path } = $info;
  97                 return;
  98         }
  99
 100         # we could use Mojo::JSON here, but it's too slow
 101 #       $data = from_json read_file $path;
 102         my $data = read_file $full_path;
 103         warn "# data snippet: ", substr($data,0,200);
 104         my @header;
 105         if ( $path =~ m/\.js/ ) {
 106                 Encode::_utf8_on($data);
 107                 $data = from_json $data;
 108         } elsif ( $path =~ m/\.txt/ ) {
 109                 my @lines = split(/\r?\n/, $data);
 110                 $data = { items => [] };
 111
 112                 my $header_line = shift @lines;
 113                 my $multiline = $header_line =~ s/\^//g;
 114                 @header = split(/\|/, $header_line );
 115                 warn "# header ", dump( @header );
 116                 while ( my $line = shift @lines ) {
 117                         $line =~ s/\^//g;
 118                         chomp $line;
 119                         my @v = split(/\|/, $line);
 120                         while ( @lines && $#v < $#header ) {
 121                                 $line = $lines[0];
 122                                 $line =~ s/\^//g;
 123                                 chomp $line;
 124                                 my @more_v = split(/\|/, $line);
 125                                 if ( $#v + $#more_v > $#header ) {
 126                                         warn "short line: ",dump( @v );
 127                                         last;
 128                                 }
 129                                 shift @lines;
 130                                 $v[ $#v ] .= shift @more_v if @more_v;
 131                                 push @v, @more_v if @more_v;
 132
 133                                 if ( $#v > $#header ) {
 134                                         die "# splice $#header ", dump( @v );
 135                                         @v = splice @v, 0, $#header;
 136                                 }
 137                         }
 138                         my $item;
 139                         foreach my $i ( 0 .. $#v ) {
 140                                 $item->{ $header[$i] || "f_$i" } = [ $v[$i] ];
 141                         }
 142                         push @{ $data->{items} }, $item;
 143                 }
 144         } else {
 145                 warn "file format unknown $path";
 146         }
 147
 148         my $stats;
 149
 150         foreach my $e ( @{ $data->{items} } ) {
 151                 foreach my $n ( keys %$e ) {
 152                         $stats->{$n}->{count}++;
 153                         my @v;
 154                         if ( ref $e->{$n} eq 'ARRAY' ) {
 155                                 $stats->{$n}->{array} += $#{ $e->{$n} } + 1;
 156                                 @v = @{ $e->{$n} };
 157                         } else {
 158                                 @v = ( $e->{$n} );
 159                         }
 160
 161                         foreach my $x ( @v ) {
 162                                 $stats->{$n}->{numeric}++
 163                                         if $x =~ m/^[-+]?([0-9]*\.[0-9]+|[0-9]+)$/;
 164                                 $stats->{$n}->{empty}++
 165                                         if length $x == 0; # faster than $x =~ m/^\s*$/;
 166                         }
 167
 168                 }
 169         }
 170
 171         foreach my $n ( keys %$stats ) {
 172                 next unless defined $stats->{$n}->{array};
 173                 delete $stats->{$n}->{array}
 174                         if $stats->{$n}->{array} == $stats->{$n}->{count};
 175         }
 176
 177         if ( ! @header ) {
 178                 if ( defined $data->{header} ) {
 179                         if ( ref $data->{header} eq 'ARRAY' ) {
 180                                 @header = @{ $data->{header} };
 181                         } else {
 182                                 warn "header not array ", dump( $data->{header} );
 183                         }
 184                 }
 185         }
 186
 187         @header =
 188                 sort { $stats->{$b}->{count} <=> $stats->{$a}->{count} }
 189                 grep { defined $stats->{$_}->{count} } keys %$stats
 190                 unless @header;
 191
 192         warn dump($stats);
 193
 194         my $info = {
 195                 header => [ @header ],
 196                 stats  => $stats,
 197                 full_path => $full_path,
 198                 size => -s $full_path,
 199                 mtime => (stat($full_path))[9],
 200                 data => $data,
 201         };
 202
 203         $loaded->{ $path } = $info;
 204         $self->_save( $path );
 205
 206 }
 207
 208
 209 sub load {
 210         my $self = shift;
 211
 212         my @paths = $self->param('paths');
 213         warn "# paths ", dump @paths;
 214         $self->_load_path( $_ ) foreach @paths;
 215
 216         my $path = $self->param('path') || $self->redirect_to( '/data/index' );
 217         warn "# path $path\n";
 218         $self->session('path' => $path);
 219         $self->_load_path( $path );
 220
 221         $self->session( 'header' => $loaded->{$path}->{header} );
 222         if ( ! defined $loaded->{$path}->{columns} ) {
 223                 $self->session( 'columns' => $loaded->{$path}->{header} );
 224                 $self->session( 'order'   => $loaded->{$path}->{header}->[0] );
 225                 $self->redirect_to( '/data/columns' );
 226         } else {
 227                 $self->session( 'columns' => $loaded->{$path}->{columns} );
 228                 $self->session( 'order'   => $loaded->{$path}->{columns}->[0] );
 229                 $self->redirect_to( '/data/items' );
 230         }
 231 }
 232
 233
 234 sub _loaded {
 235         my ( $self, $name ) = @_;
 236         my $path = $self->session('path');
 237         $self->redirect_to('/data/index') unless $path;
 238         if ( ! defined $loaded->{$path}->{$name} ) {
 239                 warn "$path $name doesn't exist in loaded ",dump( $loaded );
 240                 $self->redirect_to('/data/index');
 241         }
 242         return $loaded->{$path}->{$name};
 243 }
 244
 245
 246 sub _checked {
 247         my $self = shift;
 248         my $checked;
 249         $checked->{$_}++ foreach @_;
 250 #       warn "# _checked ",dump($checked);
 251         return $checked;
 252 }
 253
 254
 255 sub columns {
 256     my $self = shift;
 257
 258         if ( $self->param('columns') ) {
 259                 $self->_perm_array('columns');
 260                 $self->redirect_to('/data/items');
 261         }
 262
 263         my $stats = $self->_loaded( 'stats' ); # || $self->redirect_to( '/data/index' );
 264
 265         my @columns;
 266         @columns = grep { defined $stats->{$_}->{count} } @{ $self->session('columns') } if $self->session('columns');
 267
 268         foreach my $c ( @{ $self->session( 'header' ) } ) {
 269                 push @columns, $c unless grep { /^\Q$c\E$/ } @columns;
 270         }
 271
 272     $self->render(
 273                 message => 'Select columns to display',
 274                 stats => $stats,
 275                 columns => \@columns,
 276                 checked => $self->_checked( $self->_perm_array('columns') ),
 277         );
 278 }
 279
 280 sub _perm_array {
 281     my ($self,$name) = @_;
 282
 283         my @array = $self->param($name);
 284         my $path  = $self->session('path');
 285
 286         if ( @array ) {
 287                 $self->session($name => [ @array ]);
 288                 $loaded->{$path}->{$name} = [ @array ];
 289         } elsif ( my $session = $self->session($name) ) {
 290                 if ( ref $session eq 'ARRAY' ) {
 291                         @array = @$session;
 292                 } else {
 293                         die "$name not array ",dump($session);
 294                 }
 295         }
 296         #warn "# $name ",dump @array;
 297         return @array;
 298 }
 299
 300 sub _perm_scalar {
 301     my ($self,$name,$default) = @_;
 302
 303         my $scalar = $self->param($name);
 304
 305         if ( defined $scalar ) {
 306                 $self->session($name => $scalar);
 307         } else {
 308                 $scalar = $self->session($name);
 309         }
 310
 311         if ( ! defined $scalar ) {
 312                 $scalar = $default;
 313                 die "no default for $name" unless defined $scalar;
 314                 $self->session($name => $scalar);
 315         }
 316
 317         warn "# _perm_scalar $name ",dump $scalar;
 318         return $scalar;
 319 }
 320
 321 sub filter {
 322         my $self = shift;
 323
 324         my $name = $self->param('filter_name') || die "name?";
 325         my @vals = $self->param('filter_vals');
 326
 327         $self->_remove_filter( $name );
 328         $self->_filter_on_data( $name, @vals ) if @vals;
 329
 330         $self->session( 'offset' => 0 );
 331
 332         $self->redirect_to('/data/items');
 333 }
 334
 335 sub _filter_on_data {
 336         my ( $self, $name, @vals ) = @_;
 337
 338         my $path = $self->session('path');
 339
 340         if ( ! defined $loaded->{$path}->{stats}->{ $name } ) {
 341                 warn "filter $name not found in data set";
 342                 return;
 343         }
 344
 345         $filters->{$name} = [ @vals ];
 346         warn "_filter_on_data $name ", $#vals + 1, " values on $path\n";
 347
 348         my $filter_hash;
 349         $filter_hash->{$_}++ foreach @vals;
 350
 351         #warn "# filter_hash ",dump( $filter_hash );
 352
 353         my $items = $self->_loaded('data')->{items};
 354
 355         my $include_missing = defined $filter_hash->{_missing};
 356         my $filtered_items;
 357
 358         foreach my $i ( 0 .. $#$items ) {
 359
 360                 if ( defined $items->[$i]->{$name} ) {
 361                         foreach my $v ( @{ $items->[$i]->{$name} } ) {
 362                                 if ( defined $filter_hash->{ $v } ) {
 363                                         $filtered_items->{$i}++;
 364                                 }
 365                         }
 366                 } elsif ( $include_missing ) {
 367                         $filtered_items->{$i}++;
 368                 }
 369         }
 370
 371         #warn "# filter $name ",dump($filtered_items);
 372
 373         $loaded->{$path}->{filters}->{$name} = $filtered_items;
 374         warn "filter $name with ", scalar keys %$filtered_items, " items created\n";
 375 }
 376
 377 sub _data_items {
 378         my ( $self, $all ) = @_;
 379         my $data = $self->_loaded( 'data' );
 380
 381         return @{ $data->{items} } if $all == 1;
 382
 383         my $filters = $self->_current_filters;
 384         my $filter_value;
 385         foreach my $f ( keys %$filters ) {
 386                 foreach my $n ( @{ $filters->{$f} } ) {
 387                         $filter_value->{$f}->{$n} = 1;
 388                 }
 389         }
 390         my @items = @{ $data->{items} };
 391         @items = grep {
 392                 my $i = $_;
 393                 my $pass = 1;
 394                 foreach my $n ( keys %$filter_value ) {
 395                         if ( ! exists $i->{$n} ) {
 396                                 if ( defined $filter_value->{$n}->{_missing} ) {
 397                                         $pass = 1;
 398                                         next;
 399                                 } else {
 400                                         $pass = 0;
 401                                         last;
 402                                 }
 403                         }
 404                         # and match any of values in element
 405                         my $have_values = 0;
 406                         foreach my $v ( @{ $i->{$n} } ) { # FIXME not array?
 407                                 $have_values ||= 1 if defined $filter_value->{$n}->{$v};
 408                         }
 409                         if ( ! $have_values ) {
 410                                 $pass = 0;
 411                                 last;
 412                         }
 413                 }
 414                 $pass;
 415         } @items if $filter_value;
 416         return @items;
 417 }
 418
 419
 420 sub _current_filters {
 421         my $self = shift;
 422         my $current_filters;
 423         $current_filters->{ $_ } = $filters->{ $_ }
 424                 foreach (
 425                         grep { defined $filters->{ $_ } }
 426                         @{ $self->_loaded('header') }
 427                 );
 428         #warn "# current_filters ",dump($current_filters);
 429         return $current_filters;
 430 }
 431
 432 sub _data_sorted_by {
 433         my ( $self, $order ) = @_;
 434
 435         my $path = $self->session('path');
 436
 437         warn "_data_sorted_by $order from $path";
 438
 439         if ( defined $loaded->{$path}->{sorted}->{$order} ) {
 440                 return $loaded->{$path}->{sorted}->{$order};
 441         }
 442
 443         my $data = $self->_loaded( 'data' );
 444         my $numeric = $self->_is_numeric($order);
 445         my $missing = $numeric ? 0 : '';
 446         no warnings qw(numeric);
 447         my $nr = 0;
 448         my @sorted = map {
 449                 $_->[0]
 450         } sort {
 451                 if ( $numeric ) {
 452                         $a->[1] <=> $b->[1]
 453                 } else {
 454                         $a->[1] cmp $b->[1]
 455                 }
 456         } map {
 457                 [ $nr++, exists $_->{$order} ? join('', @{$_->{$order}}) : $missing ]
 458         } @{ $data->{items} }
 459         ;
 460
 461         warn "sorted: $order numeric: $numeric items: ", $#sorted + 1, "\n";
 462         #warn "# sorted ",dump( @sorted );
 463
 464         $loaded->{$path}->{sorted}->{$order} = [ @sorted ];
 465 }
 466
 467
 468 sub items {
 469         my $self = shift;
 470
 471         my $path = $self->session('path');
 472         $self->redirect_to('/data/index') unless defined $loaded->{ $path };
 473
 474         my @columns = $self->_perm_array('columns');
 475         $self->redirect_to('/data/columns') unless @columns;
 476         my $order   = $self->_perm_scalar('order', $columns[0]);
 477         my $sort    = $self->_perm_scalar('sort', 'a');
 478         my $offset  = $self->_perm_scalar('offset', 0);
 479         my $limit   = $self->_perm_scalar('limit', 20);
 480         $self->_perm_scalar('show', 'table');
 481
 482         # fix offset when changing limit
 483         $offset = int( $offset / $limit ) * $limit;
 484
 485         my $sorted = $self->_data_sorted_by( $order );
 486
 487         my @filter_names;
 488         if ( $filters ) {
 489                 foreach my $name ( keys %$filters ) {
 490                         if ( ! defined $loaded->{$path}->{stats}->{ $name } ) {
 491                                 warn "skip filter $name not found in $path\n";
 492                                 next;
 493                         }
 494                         push @filter_names, $name;
 495                 }
 496                 warn "filter_names ",dump( @filter_names );
 497                 foreach my $name ( @filter_names ) {
 498                         next if ref $loaded->{$path}->{filters}->{$name} eq 'ARRAY';
 499                         $self->_filter_on_data( $name, @{ $filters->{$name} } );
 500                 }
 501         }
 502
 503         my $all_filters = join(' ',sort @filter_names,'order:',$order);
 504
 505 #       warn "# all_filters $all_filters ", dump( $loaded->{$path}->{filtered}->{$all_filters} );
 506
 507         if ( ! defined $loaded->{$path}->{filtered}->{$all_filters} ) {
 508
 509                 my $path_filters = $loaded->{$path}->{filters};
 510
 511                 warn "create combined filter for $all_filters\n";
 512
 513                 my @filtered;
 514                 foreach my $i ( 0 .. $#$sorted ) {
 515                         my $pos = $sorted->[$i];
 516
 517                         if ( $#filter_names == -1 ) {
 518                                 push @filtered, $pos;
 519                                 next;
 520                         }
 521
 522                         my $skip = 0;
 523                         foreach ( @filter_names ) {
 524                                 $skip ||= 1 if ! defined $path_filters->{$_}->{$pos};
 525                         }
 526                         next if $skip;
 527
 528                         push @filtered, $pos;
 529                 }
 530
 531                 $loaded->{$path}->{filtered}->{$all_filters} = [ @filtered ];
 532         }
 533
 534         my $filtered = $loaded->{$path}->{filtered}->{$all_filters}
 535                 if defined $loaded->{$path}->{filtered}->{$all_filters};
 536
 537         warn "all_filters $all_filters produced ", $#$filtered + 1, " items\n" if $filtered;
 538
 539         my $sorted_items;
 540         my $data = $self->_loaded('data');
 541         my $from_end = $sort eq 'd' ? $#$filtered : 0;
 542         foreach ( 0 .. $limit ) {
 543                 my $i = $_ + $offset;
 544                 last unless defined $filtered->[$i];
 545                 $i = $from_end - $i if $from_end;
 546                 my $id = $filtered->[$i];
 547                 push @$sorted_items,
 548                 my $item = $data->{items}->[ $id ];
 549                 $item->{_row_id} ||= $id;
 550         }
 551
 552         warn "# sorted_items ", $#$sorted_items + 1, " offset $offset limit $limit order $sort";
 553
 554         $self->render(
 555                 order => $order,
 556                 offset => $offset,
 557                 limit => $limit,
 558                 sorted => $sorted_items,
 559                 columns => [ @columns ],
 560                 rows => $#$filtered + 1,
 561                 numeric => { map { $_, $self->_is_numeric($_) } @columns },
 562                 filters => $self->_current_filters,
 563         );
 564
 565 }
 566
 567
 568 sub order {
 569         my $self = shift;
 570         $self->session('order', $self->param('order'));
 571         $self->session('sort', $self->param('sort'));
 572         $self->redirect_to('/data/items');
 573 }
 574
 575 sub _is_numeric {
 576         my ( $self, $name ) = @_;
 577
 578         my $stats = $self->_loaded( 'stats' );
 579
 580         # sort facet numerically if more >50% elements are numeric
 581         my $count = $stats->{$name}->{count};
 582         $count   -= $stats->{$name}->{empty} if defined $stats->{$name}->{empty};
 583         defined $stats->{$name}->{numeric} &&
 584                 $stats->{$name}->{numeric} > $count / 2;
 585 }
 586
 587 sub _remove_filter {
 588         my ($self,$name) = @_;
 589         warn "_remove_filter $name\n";
 590
 591         my $path = $self->session('path');
 592
 593         delete $filters->{$name};
 594         delete $loaded->{$path}->{filters}->{$name};
 595         warn "filters left: ", keys %{ $loaded->{$path}->{filters} };
 596
 597         foreach (
 598                         grep { /\b$name\b/ }
 599                         keys %{ $loaded->{$path}->{filtered} }
 600         ) {
 601                 delete $loaded->{$path}->{filtered}->{$_};
 602                 warn "remove filtered cache $_";
 603         }
 604 }
 605
 606 sub facet {
 607         my $self = shift;
 608
 609         my $path = $self->session('path') || $self->redirect_to( '/data/index' );
 610
 611         if ( my $name = $self->param('remove') ) {
 612                 $self->_remove_filter( $name );
 613                 $self->redirect_to( '/data/items' );
 614         }
 615
 616         my $facet;
 617         my $name = $self->param('name') || die "no name";
 618
 619         my $all = $self->_perm_scalar('all', 1);
 620         my $data = $self->_loaded('data');
 621
 622         my $filters = $self->_current_filters;
 623         my $all_filters = join(' ',sort keys %$filters,'order:',$self->session('order'));
 624         my $filtered = $loaded->{$path}->{filtered}->{$all_filters}
 625                 if defined $loaded->{$path}->{filtered}->{$all_filters};
 626
 627         if ( ! $filtered || $all ) {
 628                 $filtered = [ 0 .. $#{ $data->{items} } ];
 629                 warn "filter all values\n";
 630         } else {
 631                 warn "filter using $all_filters\n";
 632         }
 633
 634         foreach my $i ( @$filtered ) {
 635                 my $item = $data->{items}->[$i];
 636                 if ( ! exists $item->{$name} ) {
 637                         $facet->{ _missing }++;
 638                 } elsif ( ref $item->{$name} eq 'ARRAY' ) {
 639                         $facet->{$_}++ foreach @{ $item->{$name} };
 640                 } else {
 641                         $facet->{ $item->{$name} }++;
 642                 }
 643         }
 644
 645 #       warn "# facet $name ",dump $facet;
 646
 647         my $checked;
 648         my @facet_names =
 649                   $all                      ? keys %$facet
 650                 : defined $filters->{$name} ? @{ $filters->{$name} }
 651                 : keys %$facet;
 652
 653         $checked = $self->_checked( @{ $filters->{$name} } ) if defined $filters->{$name};
 654
 655         my $numeric = $self->_is_numeric($name);
 656
 657         my $sort = $self->param('sort');
 658         # sort numeric facets with more than 5 values ascending
 659         $sort ||= $numeric && $#facet_names > 4 ? 'a' : 'c';
 660
 661         @facet_names = sort {
 662                 my $result;
 663                 if ( $sort eq 'a' ) {
 664                         $result = $numeric ? $a <=> $b : lc $a cmp lc $b;
 665                 } elsif ( $sort eq 'd' ) {
 666                         $result = $numeric ? $b <=> $a : lc $b cmp lc $a;
 667                 } elsif ( $sort eq 'c' ) {
 668                         $result = ( $facet->{$b} || -1 ) <=> ( $facet->{$a} || -1 )
 669                 } else {
 670                         warn "unknown sort: $sort";
 671                         $result = $a cmp $b;
 672                 }
 673                 $result = $a cmp $b unless defined $result; # FIXME cludge for numeric facets with invalid data
 674                 $result;
 675         } @facet_names;
 676
 677         $self->render( name => $name, facet => $facet, checked => $checked,
 678                 facet_names => \@facet_names, sort => $sort, numeric => $numeric,
 679         );
 680 }
 681
 682 sub edit {
 683         my $self = shift;
 684         my $content = $self->param('content');
 685
 686         my $i = $self->param('_row_id');
 687         die "invalid _row_id ",dump($i) unless $i =~ m/^\d+$/;
 688         my $path = $self->param('path') || die "no path";
 689         my $name = $self->param('name') || die "no name";
 690         my $status = 200; # 200 = OK, 201 = Created
 691
 692         if ( defined $loaded->{$path}->{data}->{items}->[$i] ) {
 693                 $content =~ s/^\s+//s;
 694                 $content =~ s/\s+$//s;
 695                 my $v;
 696                 if ( $content =~ /\xB6/ ) {     # para
 697                         $v = [ split(/\s*\xB6\s*/, $content) ];
 698                 } else {
 699                         $v = [ $content ];
 700                 }
 701
 702                 my $old = dump $loaded->{$path}->{data}->{items}->[$i]->{$name};
 703                 my $new = dump $v;
 704                 if ( $old ne $new
 705                         && ! ( $old eq 'undef' && length($content) == 0 ) # new value empty, previous undef
 706                 ) {
 707                         warn "# update $path $i $old -> $new\n";
 708                         $loaded->{$path}->{data}->{items}->[$i]->{$name} = $v;
 709
 710                         if ( defined $loaded->{$path}->{sorted}->{$name} ) {
 711                             delete $loaded->{$path}->{sorted}->{$name};
 712                                 warn "# invalidate $path sorted $name\n";
 713                         }
 714
 715                         foreach ( grep { m/$name/ } keys %{ $loaded->{$path}->{filtered} } ) {
 716                             delete $loaded->{$path}->{filtered}->{$_};
 717                                 warn "# invalidate $path filtered $_\n";
 718                         }
 719
 720                         $status = 201; # created
 721                         $self->session('save_path' => $path);
 722
 723                 } else {
 724                         warn "# unchanged $path $i $old\n";
 725                         $status = 304;
 726                 }
 727         } else {
 728                 $content = "$path $i $name doesn't exist\n";
 729                 $status = 404;
 730         }
 731
 732         warn "# edit $status $content";
 733
 734         $self->render(
 735                 status => $status,
 736                 content => $content,
 737         );
 738 }
 739
 740
 741 sub save {
 742         my $self = shift;
 743         my $path = $self->param('path');
 744         $path  ||= $self->session('path');
 745
 746         my $dump_path = $self->_save( $path );
 747         $self->session('save_path' => 0);
 748
 749         $self->redirect_to( '/data/items' );
 750 }
 751
 752 1;