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1 | # BEGIN BPS TAGGED BLOCK {{{ |
2 | # | |
3 | # COPYRIGHT: | |
4 | # | |
320f0092 | 5 | # This software is Copyright (c) 1996-2014 Best Practical Solutions, LLC |
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6 | # <sales@bestpractical.com> |
7 | # | |
8 | # (Except where explicitly superseded by other copyright notices) | |
9 | # | |
10 | # | |
11 | # LICENSE: | |
12 | # | |
13 | # This work is made available to you under the terms of Version 2 of | |
14 | # the GNU General Public License. A copy of that license should have | |
15 | # been provided with this software, but in any event can be snarfed | |
16 | # from www.gnu.org. | |
17 | # | |
18 | # This work is distributed in the hope that it will be useful, but | |
19 | # WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
21 | # General Public License for more details. | |
22 | # | |
23 | # You should have received a copy of the GNU General Public License | |
24 | # along with this program; if not, write to the Free Software | |
25 | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
26 | # 02110-1301 or visit their web page on the internet at | |
27 | # http://www.gnu.org/licenses/old-licenses/gpl-2.0.html. | |
28 | # | |
29 | # | |
30 | # CONTRIBUTION SUBMISSION POLICY: | |
31 | # | |
32 | # (The following paragraph is not intended to limit the rights granted | |
33 | # to you to modify and distribute this software under the terms of | |
34 | # the GNU General Public License and is only of importance to you if | |
35 | # you choose to contribute your changes and enhancements to the | |
36 | # community by submitting them to Best Practical Solutions, LLC.) | |
37 | # | |
38 | # By intentionally submitting any modifications, corrections or | |
39 | # derivatives to this work, or any other work intended for use with | |
40 | # Request Tracker, to Best Practical Solutions, LLC, you confirm that | |
41 | # you are the copyright holder for those contributions and you grant | |
42 | # Best Practical Solutions, LLC a nonexclusive, worldwide, irrevocable, | |
43 | # royalty-free, perpetual, license to use, copy, create derivative | |
44 | # works based on those contributions, and sublicense and distribute | |
45 | # those contributions and any derivatives thereof. | |
46 | # | |
47 | # END BPS TAGGED BLOCK }}} | |
48 | ||
49 | package RT::Shredder::Plugin; | |
50 | ||
51 | use strict; | |
52 | use warnings FATAL => 'all'; | |
53 | use File::Spec (); | |
54 | ||
55 | =head1 NAME | |
56 | ||
57 | RT::Shredder::Plugin - interface to access shredder plugins | |
58 | ||
59 | =head1 SYNOPSIS | |
60 | ||
61 | use RT::Shredder::Plugin; | |
62 | ||
63 | # get list of the plugins | |
64 | my %plugins = RT::Shredder::Plugin->List; | |
65 | ||
66 | # load plugin by name | |
67 | my $plugin = RT::Shredder::Plugin->new; | |
68 | my( $status, $msg ) = $plugin->LoadByName( 'Tickets' ); | |
69 | unless( $status ) { | |
70 | print STDERR "Couldn't load plugin 'Tickets': $msg\n"; | |
71 | exit(1); | |
72 | } | |
73 | ||
74 | # load plugin by preformatted string | |
75 | my $plugin = RT::Shredder::Plugin->new; | |
76 | my( $status, $msg ) = $plugin->LoadByString( 'Tickets=status,deleted' ); | |
77 | unless( $status ) { | |
78 | print STDERR "Couldn't load plugin: $msg\n"; | |
79 | exit(1); | |
80 | } | |
81 | ||
82 | =head1 METHODS | |
83 | ||
84 | =head2 new | |
85 | ||
86 | Object constructor, returns new object. Takes optional hash | |
87 | as arguments, it's not required and this class doesn't use it, | |
88 | but plugins could define some arguments and can handle them | |
89 | after your've load it. | |
90 | ||
91 | =cut | |
92 | ||
93 | sub new | |
94 | { | |
95 | my $proto = shift; | |
96 | my $self = bless( {}, ref $proto || $proto ); | |
97 | $self->_Init( @_ ); | |
98 | return $self; | |
99 | } | |
100 | ||
101 | sub _Init | |
102 | { | |
103 | my $self = shift; | |
104 | my %args = ( @_ ); | |
105 | $self->{'opt'} = \%args; | |
106 | } | |
107 | ||
108 | =head2 List | |
109 | ||
110 | Returns hash with names of the available plugins as keys and path to | |
111 | library files as values. Method has no arguments. Can be used as class | |
112 | method too. | |
113 | ||
114 | Takes optional argument C<type> and leaves in the result hash only | |
115 | plugins of that type. | |
116 | ||
117 | =cut | |
118 | ||
119 | sub List | |
120 | { | |
121 | my $self = shift; | |
122 | my $type = shift; | |
123 | ||
124 | my @files; | |
125 | foreach my $root( @INC ) { | |
126 | my $mask = File::Spec->catfile( $root, qw(RT Shredder Plugin *.pm) ); | |
127 | push @files, glob $mask; | |
128 | } | |
129 | ||
130 | my %res; | |
131 | for my $f (reverse @files) { | |
132 | $res{$1} = $f if $f =~ /([^\\\/]+)\.pm$/; | |
133 | } | |
134 | ||
135 | return %res unless $type; | |
136 | ||
137 | delete $res{'Base'}; | |
138 | foreach my $name( keys %res ) { | |
139 | my $class = join '::', qw(RT Shredder Plugin), $name; | |
140 | unless( eval "require $class" ) { | |
141 | delete $res{ $name }; | |
142 | next; | |
143 | } | |
144 | next if lc $class->Type eq lc $type; | |
145 | delete $res{ $name }; | |
146 | } | |
147 | ||
148 | return %res; | |
149 | } | |
150 | ||
151 | =head2 LoadByName | |
152 | ||
153 | Takes name of the plugin as first argument, loads plugin, | |
154 | creates new plugin object and reblesses self into plugin | |
155 | if all steps were successfuly finished, then you don't need to | |
156 | create new object for the plugin. | |
157 | ||
158 | Other arguments are sent to the constructor of the plugin | |
159 | (method new.) | |
160 | ||
161 | Returns C<$status> and C<$message>. On errors status | |
162 | is C<false> value. | |
163 | ||
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164 | In scalar context, returns $status only. |
165 | ||
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166 | =cut |
167 | ||
168 | sub LoadByName | |
169 | { | |
170 | my $self = shift; | |
171 | my $name = shift or return (0, "Name not specified"); | |
172 | $name =~ /^\w+(::\w+)*$/ or return (0, "Invalid plugin name"); | |
173 | ||
174 | local $@; | |
175 | my $plugin = "RT::Shredder::Plugin::$name"; | |
176 | eval "require $plugin" or return( 0, $@ ); | |
af59614d | 177 | return wantarray ? ( 0, "Plugin '$plugin' has no method new") : 0 unless $plugin->can('new'); |
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178 | |
179 | my $obj = eval { $plugin->new( @_ ) }; | |
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180 | return wantarray ? ( 0, $@ ) : 0 if $@; |
181 | return wantarray ? ( 0, 'constructor returned empty object' ) : 0 unless $obj; | |
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182 | |
183 | $self->Rebless( $obj ); | |
af59614d | 184 | return wantarray ? ( 1, "successfuly load plugin" ) : 1; |
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185 | } |
186 | ||
187 | =head2 LoadByString | |
188 | ||
189 | Takes formatted string as first argument and which is used to | |
190 | load plugin. The format of the string is | |
191 | ||
192 | <plugin name>[=<arg>,<val>[;<arg>,<val>]...] | |
193 | ||
194 | exactly like in the L<rt-shredder> script. All other | |
195 | arguments are sent to the plugins constructor. | |
196 | ||
197 | Method does the same things as C<LoadByName>, but also | |
198 | checks if the plugin supports arguments and values are correct, | |
199 | so you can C<Run> specified plugin immediatly. | |
200 | ||
201 | Returns list with C<$status> and C<$message>. On errors status | |
202 | is C<false>. | |
203 | ||
204 | =cut | |
205 | ||
206 | sub LoadByString | |
207 | { | |
208 | my $self = shift; | |
209 | my ($plugin, $args) = split /=/, ( shift || '' ), 2; | |
210 | ||
211 | my ($status, $msg) = $self->LoadByName( $plugin, @_ ); | |
212 | return( $status, $msg ) unless $status; | |
213 | ||
214 | my %args; | |
215 | foreach( split /\s*;\s*/, ( $args || '' ) ) { | |
216 | my( $k,$v ) = split /\s*,\s*/, ( $_ || '' ), 2; | |
217 | unless( $args{$k} ) { | |
218 | $args{$k} = $v; | |
219 | next; | |
220 | } | |
221 | ||
222 | $args{$k} = [ $args{$k} ] unless UNIVERSAL::isa( $args{ $k }, 'ARRAY'); | |
223 | push @{ $args{$k} }, $v; | |
224 | } | |
225 | ||
226 | ($status, $msg) = $self->HasSupportForArgs( keys %args ); | |
227 | return( $status, $msg ) unless $status; | |
228 | ||
229 | ($status, $msg) = $self->TestArgs( %args ); | |
230 | return( $status, $msg ) unless $status; | |
231 | ||
232 | return( 1, "successfuly load plugin" ); | |
233 | } | |
234 | ||
235 | =head2 Rebless | |
236 | ||
237 | Instance method that takes one object as argument and rebless | |
238 | the current object into into class of the argument and copy data | |
239 | of the former. Returns nothing. | |
240 | ||
241 | Method is used by C<Load*> methods to automaticaly rebless | |
242 | C<RT::Shredder::Plugin> object into class of the loaded | |
243 | plugin. | |
244 | ||
245 | =cut | |
246 | ||
247 | sub Rebless | |
248 | { | |
249 | my( $self, $obj ) = @_; | |
250 | bless( $self, ref $obj ); | |
251 | %{$self} = %{$obj}; | |
252 | return; | |
253 | } | |
254 | ||
255 | 1; |