1 package SL::Helper::Csv;
9 use Params::Validate qw(:all);
10 use List::MoreUtils qw(all pairwise);
12 use Rose::Object::MakeMethods::Generic scalar => [ qw(
13 file encoding sep_char quote_char escape_char header profile
14 numberformat dateformat ignore_unknown_columns strict_profile is_multiplexed
15 _row_header _io _csv _objects _parsed _data _errors all_cvar_configs case_insensitive_header
18 use SL::Helper::Csv::Dispatcher;
19 use SL::Helper::Csv::Error;
25 my %params = validate(@_, {
26 sep_char => { default => ';' },
27 quote_char => { default => '"' },
28 escape_char => { default => '"' },
29 header => { type => ARRAYREF, optional => 1 },
30 profile => { type => ARRAYREF, optional => 1 },
35 ignore_unknown_columns => 0,
37 case_insensitive_header => 0,
39 my $self = bless {}, $class;
41 $self->$_($params{$_}) for keys %params;
43 $self->_io(IO::File->new);
44 $self->_csv(Text::CSV_XS->new({
46 sep_char => $self->sep_char,
47 quote_char => $self->quote_char,
48 escape_char => $self->escape_char,
57 my ($self, %params) = @_;
60 return if ! $self->_check_multiplexed;
61 return if ! $self->_check_header;
62 return if ! $self->dispatcher->parse_profile;
63 return if ! $self->_parse_data;
74 my ($self, %params) = @_;
75 croak 'must parse first' unless $self->_parsed;
77 $self->_make_objects unless $self->_objects;
78 return wantarray ? @{ $self->_objects } : $self->_objects;
92 my ($self, %params) = @_;
94 $self->encoding($self->_guess_encoding) if !$self->encoding;
96 $self->_io->open($self->file, '<' . $self->_encode_layer)
97 or die "could not open file " . $self->file;
102 # check, if data is multiplexed and if all nessesary infos are given
103 sub _check_multiplexed {
104 my ($self, %params) = @_;
106 $self->is_multiplexed(0);
108 # If more than one profile is given, it is multiplexed.
109 if ($self->profile) {
110 my @profile = @{ $self->profile };
111 if (scalar @profile > 1) {
112 # Each profile needs a class and a row_ident
113 my $info_ok = all { defined $_->{class} && defined $_->{row_ident} } @profile;
116 "missing class or row_ident in one of the profiles for multiplexed data",
120 # If header is given, there need to be a header for each profile
121 # and no empty headers.
122 if ($info_ok && $self->header) {
123 my @header = @{ $self->header };
124 my $t_ok = scalar @profile == scalar @header;
127 "number of headers and number of profiles must be the same for multiplexed data",
130 $info_ok = $info_ok && $t_ok;
132 $t_ok = all { scalar @$_ > 0} @header;
135 "no empty headers are allowed for multiplexed data",
138 $info_ok = $info_ok && $t_ok;
140 $self->is_multiplexed($info_ok);
145 # ok, if not multiplexed
150 my ($self, %params) = @_;
153 $header = $self->header;
155 my $n_header = ($self->is_multiplexed)? scalar @{ $self->profile } : 1;
156 foreach my $p_num (0..$n_header - 1) {
157 my $h = $self->_csv->getline($self->_io);
160 $self->_csv->error_input,
161 $self->_csv->error_diag,
165 push @{ $header }, $h;
169 # Special case: utf8 BOM.
170 # certain software (namely MS Office and notepad.exe insist on prefixing
171 # data with a discouraged but valid byte order mark
172 # if not removed, the first header field will not be recognized
174 my $h = $header->[0];
175 if ($h && $h->[0] && $self->encoding =~ /utf-?8/i) {
176 $h->[0] =~ s/^\x{FEFF}//;
180 # check, if all header fields are parsed well
181 return unless $header && all { $_ } @$header;
183 # Special case: human stupidity
184 # people insist that case sensitivity doesn't exist and try to enter all
185 # sorts of stuff. at this point we've got a profile (with keys that represent
186 # valid methods), and a header full of strings. if two of them match, the user
187 # mopst likely meant that field, so rewrite the header
188 if ($self->case_insensitive_header) {
189 die 'case_insensitive_header is only possible with profile' unless $self->profile;
192 foreach my $h (@{ $header }) {
194 keys %{ $self->profile->[$p_num]->{profile} || {} },
196 for my $name (@names) {
197 for my $i (0..$#$h) {
198 $h->[$i] = $name if lc $h->[$i] eq lc $name;
206 return $self->header($header);
210 my ($self, %params) = @_;
214 my $row = $self->_csv->getline($self->_io);
216 my $header = $self->_header_by_row($row);
218 @hr{@{ $header }} = @$row;
221 last if $self->_csv->eof;
222 # Text::CSV_XS 0.89 added record number to error_diag
223 if (qv(Text::CSV_XS->VERSION) >= qv('0.89')) {
225 $self->_csv->error_input,
226 $self->_csv->error_diag,
230 $self->_csv->error_input,
231 $self->_csv->error_diag,
232 $self->_io->input_line_number,
236 last if $self->_csv->eof;
239 $self->_data(\@data);
240 $self->_push_error(@errors);
246 my ($self, $row) = @_;
248 # initialize lookup hash if not already done
249 if ($self->is_multiplexed && ! defined $self->_row_header ) {
250 $self->_row_header({ pairwise { no warnings 'once'; $a->{row_ident} => $b } @{ $self->profile }, @{ $self->header } });
253 if ($self->is_multiplexed) {
254 return $self->_row_header->{$row->[0]}
256 return $self->header->[0];
261 ':encoding(' . $_[0]->encoding . ')';
265 my ($self, %params) = @_;
268 local $::myconfig{numberformat} = $self->numberformat if $self->numberformat;
269 local $::myconfig{dateformat} = $self->dateformat if $self->dateformat;
271 for my $line (@{ $self->_data }) {
272 my $tmp_obj = $self->dispatcher->dispatch($line);
273 push @objs, $tmp_obj;
276 $self->_objects(\@objs);
280 my ($self, %params) = @_;
282 $self->{_dispatcher} ||= $self->_make_dispatcher;
285 sub _make_dispatcher {
286 my ($self, %params) = @_;
288 die 'need a header to make a dispatcher' unless $self->header;
290 return SL::Helper::Csv::Dispatcher->new($self);
293 sub _guess_encoding {
299 my ($self, @errors) = @_;
300 my @new_errors = ($self->errors, map { SL::Helper::Csv::Error->new(@$_) } @errors);
301 $self->_errors(\@new_errors);
313 SL::Helper::Csv - take care of csv file uploads
319 my $csv = SL::Helper::Csv->new(
320 file => \$::form->{upload_file},
321 encoding => 'utf-8', # undef means utf8
322 sep_char => ',', # default ';'
323 quote_char => '\'', # default '"'
324 escape_char => '"', # default '"'
325 header => [ [qw(id text sellprice word)] ], # see later
326 profile => [ { profile => { sellprice => 'sellprice_as_number'},
327 class => 'SL::DB::Part' } ],
330 my $status = $csv->parse;
331 my $hrefs = $csv->get_data;
332 my @objects = $csv->get_objects;
334 my @errors = $csv->errors;
340 Text::CSV offeres already good functions to get lines out of a csv file, but in
341 most cases you will want those line to be parsed into hashes or even objects,
342 so this model just skips ahead and gives you objects.
344 Its basic assumptions are:
348 =item You do know what you expect to be in that csv file.
350 This means first and foremost you have knowledge about encoding, number and
351 date format, csv parameters such as quoting and separation characters. You also
352 know what content will be in that csv and what L<Rose::DB> is responsible for
353 it. You provide valid header columns and their mapping to the objects.
355 =item You do NOT know if the csv provider yields to your expectations.
357 Stuff that does not work with what you expect should not crash anything, but
358 give you a hint what went wrong. As a result, if you remember to check for
359 errors after each step, you should be fine.
361 =item Data does not make sense. It's just data.
363 Almost all data imports have some type of constraints. Some data needs to be
364 unique, other data needs to be connected to existing data sets. This will not
365 happen here. You will receive a plain mapping of the data into the class tree,
370 This module can handle multiplexed data of different class types. In that case
371 multiple profiles with classes and row identifiers must be given. Multiple
372 headers may also be given or read from csv data. Data must contain the row
373 identifier in the first column and it's field name must be 'datatype'.
383 Standard constructor. You can use this to set most of the data.
387 Do the actual work. Will return true ($self actually) if success, undef if not.
391 Parse the data into objects and return those.
393 This method will return list or arrayref depending on context.
397 Returns an arrayref of the raw lines as hashrefs.
401 Return all errors that came up during parsing. See error handling for detailed
412 The file which contents are to be read. Can be a name of a physical file or a
413 scalar ref for memory data.
417 Encoding of the CSV file. Note that this module does not do any encoding
418 guessing. Know what your data is. Defaults to utf-8.
426 Same as in L<Text::CSV>
428 =item C<header> \@HEADERS
430 If given, it contains an ARRAYREF for each different class type (i.e. one
431 ARRAYREF if the data is only of one class type). These ARRAYREFS are the header
432 fields which are an array of columns. In this case the first lines are not used
433 as a header. Empty header fields will be ignored in objects.
435 If not given, headers are taken from the first n lines of data, where n is the
436 number of different class types.
440 classic data of one type:
441 [ [ 'name', 'street', 'zipcode', 'city' ] ]
443 multiplexed data with two different types
444 [ [ 'ordernumber', 'customer', 'transdate' ], [ 'partnumber', 'qty', 'sellprice' ] ]
446 =item C<profile> [{profile => \%ACCESSORS, class => class, row_ident => ri},]
448 This is an ARRAYREF to HASHREFs which may contain the keys C<profile>, C<class>
451 The C<profile> is a HASHREF which may be used to map header fields to custom
454 [ {profile => { listprice => listprice_as_number }} ]
456 In this case C<listprice_as_number> will be used to read in values from the
459 In case of a One-To-One relationsship these can also be set over
460 relationsships by sparating the steps with a dot (C<.>). This will work:
462 [ {profile => { customer => 'customer.name' }} ]
464 And will result in something like this:
466 $obj->customer($obj->meta->relationship('customer')->class->new);
467 $obj->customer->name($csv_line->{customer})
469 But beware, this will not try to look up anything in the database. You will
470 simply receive objects that represent what the profile defined. If some of
471 these information are unique, and should be connected to preexisting data, you
472 will have to do that for yourself. Since you provided the profile, it is
473 assumed you know what to do in this case.
475 If no profile is given, any header field found will be taken as is.
477 If the path in a profile entry is empty, the field will be subjected to
478 C<strict_profile> and C<case_insensitive_header> checking, will be parsed into
479 C<get_data>, but will not be attempted to be dispatched into objects.
481 If C<class> is present, the line will be handed to the new sub of this class,
482 and the return value used instead of the line itself.
484 C<row_ident> is a string to recognize the right profile and class for each data
485 line in multiplexed data.
487 In case of multiplexed data, C<class> and C<row_ident> must be given.
490 class => 'SL::DB::Order',
494 class => 'SL::DB::OrderItem',
496 profile => {sellprice => sellprice_as_number}
499 =item C<ignore_unknown_columns>
501 If set, the import will ignore unkown header columns. Useful for lazy imports,
502 but deactivated by default.
504 =item C<case_insensitive_header>
506 If set, header columns will be matched against profile entries case
507 insensitive, and on match the profile name will be taken.
509 Only works if a profile is given, will die otherwise.
511 If both C<case_insensitive_header> and C<strict_profile> is set, matched header
512 columns will be accepted.
514 =item C<strict_profile>
516 If set, all columns to be parsed must be specified in C<profile>. Every header
517 field not listed there will be treated like an unknown column.
519 If both C<case_insensitive_header> and C<strict_profile> is set, matched header
520 columns will be accepted.
524 =head1 ERROR HANDLING
526 After parsing a file all errors will be accumulated into C<errors>.
527 Each entry is an object with the following attributes:
529 raw_input: offending raw input,
530 code: Text::CSV error code if Text:CSV signalled an error, 0 else,
531 diag: error diagnostics,
532 line: position in line,
533 col: estimated line in file,
535 Note that the last entry can be off, but will give an estimate.
543 sep_char, quote_char, and escape_char are passed to Text::CSV on creation.
544 Changing them later has no effect currently.
548 Encoding errors are not dealt with properly.
554 Dispatch to child objects, like this:
556 $csv = SL::Helper::Csv->new(
569 class => SL::DB::Part,
575 Sven Schöling E<lt>s.schoeling@linet-services.deE<gt>