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361 lines
8.7 KiB
Perl
361 lines
8.7 KiB
Perl
# -*- Mode: perl; indent-tabs-mode: nil -*-
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#
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# The contents of this file are subject to the Mozilla Public
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# License Version 1.1 (the "License"); you may not use this file
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# except in compliance with the License. You may obtain a copy of
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# the License at http://www.mozilla.org/MPL/
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#
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# Software distributed under the License is distributed on an "AS
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# IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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# implied. See the License for the specific language governing
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# rights and limitations under the License.
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#
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# The Original Code is the Bugzilla Bug Tracking System.
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#
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# Contributor(s): Dan Mosedale <dmose@mozilla.org>
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# Frédéric Buclin <LpSolit@gmail.com>
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# Myk Melez <myk@mozilla.org>
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=head1 NAME
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Bugzilla::Field - a particular piece of information about bugs
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and useful routines for form field manipulation
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=head1 SYNOPSIS
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use Bugzilla;
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use Data::Dumper;
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# Display information about all fields.
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print Dumper(Bugzilla->get_fields());
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# Display information about non-obsolete custom fields.
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print Dumper(Bugzilla->get_fields({ obsolete => 1, custom => 1 }));
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# Display a list of the names of non-obsolete custom fields.
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print Bugzilla->custom_field_names;
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use Bugzilla::Field;
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# Display information about non-obsolete custom fields.
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# Bugzilla->get_fields() is a wrapper around Bugzilla::Field::match(),
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# so both methods take the same arguments.
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print Dumper(Bugzilla::Field::match({ obsolete => 1, custom => 1 }));
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# Create a custom field.
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my $field = Bugzilla::Field::create("hilarity", "Hilarity");
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print "$field->{description} is a custom field\n";
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# Instantiate a Field object for an existing field.
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my $field = new Bugzilla::Field('qacontact_accessible');
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if ($field->{obsolete}) {
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print "$field->{description} is obsolete\n";
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}
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# Validation Routines
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check_field($name, $value, \@legal_values, $no_warn);
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$fieldid = get_field_id($fieldname);
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=head1 DESCRIPTION
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Field.pm defines field objects, which represent the particular pieces
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of information that Bugzilla stores about bugs.
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This package also provides functions for dealing with CGI form fields.
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=cut
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package Bugzilla::Field;
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use strict;
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use base qw(Exporter);
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@Bugzilla::Field::EXPORT = qw(check_field get_field_id);
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use Bugzilla::Util;
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use Bugzilla::Constants;
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use Bugzilla::Error;
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use constant DB_COLUMNS => (
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'fieldid AS id',
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'name',
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'description',
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'type',
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'custom',
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'obsolete'
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);
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our $columns = join(", ", DB_COLUMNS);
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sub new {
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my $invocant = shift;
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my $name = shift;
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my $self = shift || Bugzilla->dbh->selectrow_hashref(
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"SELECT $columns FROM fielddefs WHERE name = ?",
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undef,
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$name
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);
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bless($self, $invocant);
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return $self;
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}
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=pod
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=head2 Instance Properties
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=over
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=item C<id>
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the unique identifier for the field;
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=back
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=cut
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sub id { return $_[0]->{id} }
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=over
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=item C<name>
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the name of the field in the database; begins with "cf_" if field
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is a custom field, but test the value of the boolean "custom" property
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to determine if a given field is a custom field;
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=back
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=cut
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sub name { return $_[0]->{name} }
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=over
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=item C<description>
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a short string describing the field; displayed to Bugzilla users
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in several places within Bugzilla's UI, f.e. as the form field label
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on the "show bug" page;
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=back
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=cut
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sub description { return $_[0]->{description} }
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=over
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=item C<type>
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an integer specifying the kind of field this is; values correspond to
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the FIELD_TYPE_* constants in Constants.pm
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=back
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=cut
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sub type { return $_[0]->{type} }
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=over
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=item C<custom>
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a boolean specifying whether or not the field is a custom field;
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if true, field name should start "cf_", but use this property to determine
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which fields are custom fields;
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=back
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=cut
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sub custom { return $_[0]->{custom} }
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=over
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=item C<obsolete>
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a boolean specifying whether or not the field is obsolete;
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=back
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=cut
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sub obsolete { return $_[0]->{obsolete} }
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=pod
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=head2 Class Methods
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=over
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=item C<create($name, $desc)>
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Description: creates a new custom field.
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Params: C<$name> - string - the name of the field;
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C<$desc> - string - the field label to display in the UI.
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Returns: a field object.
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=back
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=cut
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sub create {
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my ($name, $desc, $custom) = @_;
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# Convert the $custom argument into a DB-compatible value.
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$custom = $custom ? 1 : 0;
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my $dbh = Bugzilla->dbh;
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# Some day we'll allow invocants to specify the sort key.
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my ($sortkey) =
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$dbh->selectrow_array("SELECT MAX(sortkey) + 1 FROM fielddefs");
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# Some day we'll require invocants to specify the field type.
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my $type = FIELD_TYPE_FREETEXT;
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# Create the database column that stores the data for this field.
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$dbh->bz_add_column("bugs", $name, { TYPE => 'varchar(255)' });
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# Add the field to the list of fields at this Bugzilla installation.
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my $sth = $dbh->prepare(
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"INSERT INTO fielddefs (name, description, sortkey, type,
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custom, mailhead)
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VALUES (?, ?, ?, ?, ?, 1)"
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);
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$sth->execute($name, $desc, $sortkey, $type, $custom);
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return new Bugzilla::Field($name);
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}
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=pod
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=over
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=item C<match($criteria)>
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Description: returns a list of fields that match the specified criteria.
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Params: C<$criteria> - hash reference - the criteria to match against.
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Hash keys represent field properties; hash values represent
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their values. All criteria are optional. Valid criteria are
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"custom" and "obsolete", and both take boolean values.
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Note: Bugzilla->get_fields() and Bugzilla->custom_field_names
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wrap this method for most callers.
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Returns: a list of field objects.
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=back
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=cut
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sub match {
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my ($criteria) = @_;
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my @terms;
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if (defined $criteria->{name}) {
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push(@terms, "name=" . Bugzilla->dbh->quote($criteria->{name}));
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}
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if (defined $criteria->{custom}) {
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push(@terms, "custom=" . ($criteria->{custom} ? "1" : "0"));
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}
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if (defined $criteria->{obsolete}) {
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push(@terms, "obsolete=" . ($criteria->{obsolete} ? "1" : "0"));
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}
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my $where = (scalar(@terms) > 0) ? "WHERE " . join(" AND ", @terms) : "";
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my $records = Bugzilla->dbh->selectall_arrayref(
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"SELECT $columns FROM fielddefs $where ORDER BY sortkey",
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{ Slice => {}}
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);
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# Generate a array of field objects from the array of field records.
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my @fields = map( new Bugzilla::Field(undef, $_), @$records );
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return @fields;
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}
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=pod
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=head2 Data Validation
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=over
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=item C<check_field($name, $value, \@legal_values, $no_warn)>
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Description: Makes sure the field $name is defined and its $value
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is non empty. If @legal_values is defined, this routine
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also checks whether its value is one of the legal values
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associated with this field. If the test is successful,
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the function returns 1. If the test fails, an error
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is thrown (by default), unless $no_warn is true, in which
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case the function returns 0.
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Params: $name - the field name
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$value - the field value
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@legal_values - (optional) ref to a list of legal values
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$no_warn - (optional) do not throw an error if true
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Returns: 1 on success; 0 on failure if $no_warn is true (else an
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error is thrown).
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=back
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=cut
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sub check_field {
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my ($name, $value, $legalsRef, $no_warn) = @_;
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my $dbh = Bugzilla->dbh;
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if (!defined($value)
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|| trim($value) eq ""
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|| (defined($legalsRef) && lsearch($legalsRef, $value) < 0))
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{
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return 0 if $no_warn; # We don't want an error to be thrown; return.
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trick_taint($name);
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my ($result) = $dbh->selectrow_array('SELECT description FROM fielddefs
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WHERE name = ?', undef, $name);
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my $field = $result || $name;
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ThrowCodeError('illegal_field', { field => $field });
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}
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return 1;
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}
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=pod
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=over
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=item C<get_field_id($fieldname)>
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Description: Returns the ID of the specified field name and throws
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an error if this field does not exist.
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Params: $name - a field name
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Returns: the corresponding field ID or an error if the field name
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does not exist.
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=back
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=cut
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sub get_field_id {
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my ($name) = @_;
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my $dbh = Bugzilla->dbh;
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trick_taint($name);
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my $id = $dbh->selectrow_array('SELECT fieldid FROM fielddefs
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WHERE name = ?', undef, $name);
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ThrowCodeError('invalid_field_name', {field => $name}) unless $id;
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return $id
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}
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1;
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__END__
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