1 package SL::Helper::Csv;
8 use Params::Validate qw(:all);
10 use Rose::Object::MakeMethods::Generic scalar => [ qw(
11 file encoding sep_char quote_char escape_char header profile class
12 numberformat dateformat ignore_unknown_columns _io _csv _objects _parsed
16 use SL::Helper::Csv::Dispatcher;
22 my %params = validate(@_, {
23 sep_char => { default => ';' },
24 quote_char => { default => '"' },
25 escape_char => { default => '"' },
26 header => { type => ARRAYREF, optional => 1 },
27 profile => { type => HASHREF, optional => 1 },
33 ignore_unknown_columns => 0,
35 my $self = bless {}, $class;
37 $self->$_($params{$_}) for keys %params;
39 $self->_io(IO::File->new);
40 $self->_csv(Text::CSV->new({
42 sep_char => $self->sep_char,
43 quote_char => $self->quote_char,
44 escape_char => $self->escape_char,
53 my ($self, %params) = @_;
56 return if ! $self->_check_header;
57 return if ! $self->dispatcher->parse_profile;
58 # return if $self->class && ! $self->_check_header_for_class;
59 return if ! $self->_parse_data;
70 my ($self, %params) = @_;
71 croak 'no class given' unless $self->class;
72 croak 'must parse first' unless $self->_parsed;
74 $self->_make_objects unless $self->_objects;
75 return wantarray ? @{ $self->_objects } : $self->_objects;
89 my ($self, %params) = @_;
91 $self->encoding($self->_guess_encoding) if !$self->encoding;
93 $self->_io->open($self->file, '<' . $self->_encode_layer)
94 or die "could not open file " . $self->file;
100 my ($self, %params) = @_;
101 return $self->header if $self->header;
103 my $header = $self->_csv->getline($self->_io);
106 $self->_csv->error_input,
107 $self->_csv->error_diag,
111 $self->header($header);
115 my ($self, %params) = @_;
118 $self->_csv->column_names(@{ $self->header });
121 my $row = $self->_csv->getline($self->_io);
122 last if $self->_csv->eof;
125 @hr{@{ $self->header }} = @$row;
129 $self->_csv->error_input,
130 $self->_csv->error_diag,
131 $self->_io->input_line_number,
136 $self->_data(\@data);
137 $self->_push_error(@errors);
143 ':encoding(' . $_[0]->encoding . ')';
147 my ($self, %params) = @_;
150 eval "require " . $self->class;
151 local $::myconfig{numberformat} = $self->numberformat if $self->numberformat;
152 local $::myconfig{dateformat} = $self->dateformat if $self->dateformat;
154 for my $line (@{ $self->_data }) {
155 my $tmp_obj = $self->class->new;
156 $self->dispatcher->dispatch($tmp_obj, $line);
157 push @objs, $tmp_obj;
160 $self->_objects(\@objs);
164 my ($self, %params) = @_;
166 $self->{_dispatcher} ||= $self->_make_dispatcher;
169 sub _make_dispatcher {
170 my ($self, %params) = @_;
172 die 'need a header to make a dispatcher' unless $self->header;
174 return SL::Helper::Csv::Dispatcher->new($self);
177 sub _guess_encoding {
183 my ($self, @errors) = @_;
184 my @new_errors = ($self->errors, @errors);
185 $self->_errors(\@new_errors);
197 SL::Helper::Csv - take care of csv file uploads
203 my $csv = SL::Helper::Csv->new(
204 file => \$::form->{upload_file},
205 encoding => 'utf-8', # undef means utf8
206 sep_char => ',', # default ';'
207 quote_char => ''', # default '"'
208 header => [qw(id text sellprice word)] # see later
209 profile => { sellprice => 'sellprice_as_number' }
210 class => 'SL::DB::CsvLine', # if present, map lines to this
213 my $status = $csv->parse;
214 my $hrefs = $csv->get_data;
215 my @objects = $scv->get_objects;
221 Text::CSV offeres already good functions to get lines out of a csv file, but in
222 most cases you will want those line to be parsed into hashes or even objects,
223 so this model just skips ahead and gives you objects.
225 Encoding autodetection is not easy, and should not be trusted. Try to avoid it
234 Standard constructor. You can use this to set most of the data.
238 Do the actual work. Will return true ($self actually) if success, undef if not.
242 Parse the data into objects and return those.
244 This method will return list or arrayref depending on context.
248 Returns an arrayref of the raw lines as hashrefs.
252 Return all errors that came up druing parsing. See error handling for detailed
263 The file which contents are to be read. Can be a name of a physical file or a
264 scalar ref for memory data.
268 Encoding of the CSV file. Note that this module does not do any encoding
269 guessing. Know what your data ist. Defaults to utf-8.
277 Same as in L<Text::CSV>
279 =item C<header> \@FIELDS
281 Can be an array of columns, in this case the first line is not used as a
282 header. Empty header fields will be ignored in objects.
284 =item C<profile> \%ACCESSORS
286 May be used to map header fields to custom accessors. Example:
288 { listprice => listprice_as_number }
290 In this case C<listprice_as_number> will be used to read in values from the
295 If present, the line will be handed to the new sub of this class,
296 and the return value used instead of the line itself.
298 =item C<ignore_unknown_columns>
300 If set, the import will ignore unkown header columns. Useful for lazy imports,
301 but deactivated by default.
305 =head1 ERROR HANDLING
307 After parsing a file all errors will be accumulated into C<errors>.
309 Each entry is an arrayref with the following structure:
312 0 offending raw input,
313 1 Text::CSV error code if T:C error, 0 else,
316 4 estimated line in file,
319 Note that the last entry can be off, but will give an estimate.
327 sep_char, quote_char, and escape_char are passed to Text::CSV on creation.
328 Changing them later has no effect currently.
332 Encoding errors are not dealt with properly.
338 Dispatch to child objects, like this:
340 $csv = SL::Helper::Csv->new(
342 class => SL::DB::Part,
357 Sven Schöling E<lt>s.schoeling@linet-services.deE<gt>