C4/ItemCirculationAlertPreference.pm

   1 package C4::ItemCirculationAlertPreference;
   2
   3 # Copyright Liblime 2009
   4 #
   5 # This file is part of Koha.
   6 #
   7 # Koha is free software; you can redistribute it and/or modify it
   8 # under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 3 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # Koha is distributed in the hope that it will be useful, but
  13 # WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with Koha; if not, see <http://www.gnu.org/licenses>.
  19
  20 use strict;
  21 use warnings;
  22 use C4::Context;
  23 use C4::Category;
  24 use Carp qw(carp croak);
  25
  26 use Koha::ItemTypes;
  27
  28 our $AUTOLOAD;
  29
  30 # helper function for validating \%opts
  31 our $valid = sub {
  32     my $opts = shift;
  33     for (qw(branchcode categorycode item_type notification)) {
  34         exists($opts->{$_}) || croak("'$_' is a required parameter.");
  35     }
  36 };
  37
  38
  39
  40
  41 =head1 NAME
  42
  43 C4::ItemCirculationAlertPreference - manage preferences for sending alerts
  44
  45 =head1 SYNOPSIS
  46
  47 Basics:
  48
  49     use C4::ItemCirculationAlertPreference;
  50
  51     # a short-cut to reduce typing the long package name over and over again
  52     my $preferences = 'C4::ItemCirculationAlertPreference';
  53
  54 Creating a restriction on sending messages:
  55
  56     my $pref = $preferences->create({
  57         branchcode   => 'CPL',
  58         categorycode => 'YA',
  59         item_type    => 'BK',
  60         notification => 'CHECKOUT',
  61     });
  62
  63 Removing a restriction on sending messages:
  64
  65     $preferences->delete({
  66         branchcode   => 'CPL',
  67         categorycode => 'YA',
  68         item_type    => 'BK',
  69         notification => 'CHECKOUT',
  70     });
  71
  72 =head1 DESCRIPTION
  73
  74 This class is used to manage the preferences for when an alert may be sent.  By
  75 default, item circulation alerts are enabled for every B<branch>, B<patron
  76 category> and B<item type>.
  77
  78 However, if you would like to prevent item circulation alerts from being sent
  79 for any combination of these 3 variables, a preference can be inserted into the
  80 C<item_circulation_alert_preferences> table to make that a policy.
  81
  82 =head1 API
  83
  84 =head2 Class Methods
  85
  86 =cut
  87
  88 =head3 C4::ItemCirculationAlertPreference->new(\%opts)
  89
  90 This is a constructor for an in-memory C4::ItemCirculationAlertPreference
  91 object.  The database is not affected by this method.
  92
  93 =cut
  94
  95 sub new {
  96     my ($class, $opts) = @_;
  97     bless $opts => $class;
  98 }
  99
 100
 101
 102
 103 =head3 C4::ItemCirculationAlertPreference->create(\%opts)
 104
 105 This will find or create an item circulation alert preference.  You must pass
 106 it a B<branchcode>, B<categorycode>, B<item_type>, and B<notification>.  Valid
 107 values for these attributes are as follows:
 108
 109 =over 4
 110
 111 =item branchcode
 112
 113 branches.branchcode
 114
 115 =item categorycode
 116
 117 category.categorycode
 118
 119 =item item_type
 120
 121 itemtypes.itemtype
 122
 123 =item notification
 124
 125 This can be "CHECKIN" or "CHECKOUT"
 126
 127 =back
 128
 129 =cut
 130
 131 sub create {
 132     my ($class, $opts) = @_;
 133     $valid->($opts);
 134     my $dbh = C4::Context->dbh;
 135     my $prefs = $dbh->selectall_arrayref(
 136         "SELECT id, branchcode, categorycode, item_type
 137         FROM  item_circulation_alert_preferences
 138         WHERE branchcode   = ?
 139         AND   categorycode = ?
 140         AND   item_type    = ?
 141         AND   notification = ?",
 142         { Slice => {} },
 143         $opts->{branchcode},
 144         $opts->{categorycode},
 145         $opts->{item_type},
 146         $opts->{notification},
 147     );
 148     if (@$prefs) {
 149         return $class->new($prefs->[0]);
 150     } else {
 151         my $success = $dbh->do(
 152             "INSERT INTO item_circulation_alert_preferences
 153             (branchcode, categorycode, item_type, notification) VALUES (?, ?, ?, ?)",
 154             {},
 155             $opts->{branchcode},
 156             $opts->{categorycode},
 157             $opts->{item_type},
 158             $opts->{notification},
 159         );
 160         if ($success) {
 161             my $self = {
 162                 id           => $dbh->last_insert_id(undef, undef, undef, undef),
 163                 branchcode   => $opts->{branchcode},
 164                 categorycode => $opts->{categorycode},
 165                 item_type    => $opts->{item_type},
 166                 notification => $opts->{notification},
 167             };
 168             return $class->new($self);
 169         } else {
 170             carp $dbh->errstr;
 171             return;
 172         }
 173     }
 174 }
 175
 176
 177
 178
 179 =head3 C4::ItemCirculationAlertPreference->delete(\%opts)
 180
 181 Delete an item circulation alert preference.  You can delete by either passing
 182 in an B<id> or passing in a B<branchcode>, B<categorycode>, B<item_type>
 183 triplet.
 184
 185 =cut
 186
 187 sub delete {
 188     my ($class, $opts) = @_;
 189     my $dbh = C4::Context->dbh;
 190     if ($opts->{id}) {
 191         $dbh->do(
 192             "DELETE FROM item_circulation_alert_preferences WHERE id = ?",
 193             {},
 194             $opts->{id}
 195         );
 196     } else {
 197         $valid->($opts);
 198         my $sql =
 199             "DELETE FROM item_circulation_alert_preferences
 200             WHERE branchcode   = ?
 201             AND   categorycode = ?
 202             AND   item_type    = ?
 203             AND   notification = ?";
 204         $dbh->do(
 205             $sql,
 206             {},
 207             $opts->{branchcode},
 208             $opts->{categorycode},
 209             $opts->{item_type},
 210             $opts->{notification},
 211         );
 212     }
 213 }
 214
 215
 216
 217
 218 =head3 C4::ItemCirculationAlertPreference->is_enabled_for(\%opts)
 219
 220 Based on the existing preferences in the C<item_circulation_alert_preferences>
 221 table, can an alert be sent for the given B<branchcode>, B<categorycode>, and
 222 B<itemtype>?
 223
 224 B<Example>:
 225
 226     my $alert = 'C4::ItemCirculationAlertPreference';
 227     my $conditions = {
 228         branchcode   => 'CPL',
 229         categorycode => 'IL',
 230         item_type    => 'MU',
 231     };
 232
 233     if ($alert->is_enabled_for($conditions)) {
 234         # ...
 235     }
 236
 237 =cut
 238
 239 sub is_disabled_for {
 240     my ($class, $opts) = @_;
 241     $valid->($opts);
 242     my $dbh = C4::Context->dbh;
 243
 244     # Does a preference exist to block this alert?
 245     my $query = qq{
 246         SELECT id, branchcode, categorycode, item_type, notification
 247           FROM item_circulation_alert_preferences
 248          WHERE (branchcode   = ? OR branchcode   = '*')
 249            AND (categorycode = ? OR categorycode = '*')
 250            AND (item_type    = ? OR item_type    = '*')
 251            AND (notification = ? OR notification = '*')
 252     };
 253
 254     my $preferences = $dbh->selectall_arrayref(
 255         $query,
 256         { Slice => {} },
 257         $opts->{branchcode},
 258         $opts->{categorycode},
 259         $opts->{item_type},
 260         $opts->{notification},
 261     );
 262
 263     # If any preferences showed up, we are NOT enabled.
 264     return @$preferences;
 265 }
 266
 267 sub is_enabled_for {
 268     my ($class, $opts) = @_;
 269     return not $class->is_disabled_for($opts);
 270 }
 271
 272
 273
 274
 275 =head3 C4::ItemCirculationAlertPreference->find({ branchcode => $bc, notification => $type })
 276
 277 This method returns all the item circulation alert preferences for a given
 278 branch and notification.
 279
 280 B<Example>:
 281
 282     my @branch_prefs = C4::ItemCirculationAlertPreference->find({
 283         branchcode   => 'CPL',
 284         notification => 'CHECKIN',
 285     });
 286
 287 =cut
 288
 289 sub find {
 290     my ($class, $where) = @_;
 291     my $dbh = C4::Context->dbh;
 292     my $query = qq{
 293         SELECT id, branchcode, categorycode, item_type, notification
 294           FROM item_circulation_alert_preferences
 295          WHERE branchcode = ? AND notification = ?
 296          ORDER BY categorycode, item_type
 297     };
 298     return    map { $class->new($_) }    @{$dbh->selectall_arrayref(
 299         $query,
 300         { Slice => {} },
 301         $where->{branchcode},
 302         $where->{notification},
 303     )};
 304 }
 305
 306
 307
 308
 309 =head3 C4::ItemCirculationAlertPreference->grid({ branchcode => $c, notification => $type })
 310
 311 Return a 2D arrayref for the grid view in F<admin/item_circulation_alert_preferences.pl>.
 312 Each row represents a category (like 'Patron' or 'Young Adult') and
 313 each column represents an itemtype (like 'Book' or 'Music').
 314
 315 Each cell contains...
 316
 317 B<Example>:
 318
 319     use Data::Dump 'pp';
 320     my $grid = C4::ItemCirculationAlertPreference->grid({
 321         branchcode   => 'CPL',
 322         notification => 'CHECKOUT',
 323     });
 324     warn pp($grid);
 325
 326 See F<admin/item_circulation_alerts.pl> to see how this method is used.
 327
 328 =cut
 329
 330 sub grid {
 331     my ($class, $where) = @_;
 332     my @branch_prefs = $class->find($where);
 333     my @default_prefs = $class->find({ branchcode => '*', notification => $where->{notification} });
 334     my @cc = C4::Category->all;
 335     my @it = Koha::ItemTypes->search;
 336     my $notification = $where->{notification};
 337     my %disabled = map {
 338         my $key = $_->categorycode . "-" . $_->item_type . "-" . $notification;
 339         $key =~ s/\*/_/g;
 340         ($key => 1);
 341     } @branch_prefs;
 342     my %default = map {
 343         my $key = $_->categorycode . "-" . $_->item_type . "-" . $notification;
 344         $key =~ s/\*/_/g;
 345         ($key => 1);
 346     } @default_prefs;
 347     my @grid;
 348     for my $c (@cc) {
 349         my $row = { description => $c->description, items => [] };
 350         push @grid, $row;
 351         for my $i (@it) {
 352             my $key = $c->categorycode . "-" . $i->itemtype . "-" . $notification;
 353             $key =~ s/\*/_/g;
 354             my @classes;
 355             my $text = " ";
 356             if ($disabled{$key}) {
 357                 push @classes, 'disabled';
 358                 $text = "Disabled for $where->{branchcode}";
 359             }
 360             if ($default{$key}) {
 361                 push @classes, 'default';
 362                 $text = "Disabled for all";
 363             }
 364             push @{$row->{items}}, {
 365                 class => join(' ', @classes),
 366                 id    => $key,
 367                 text  => $text,
 368             };
 369         }
 370     }
 371     return \@grid;
 372 }
 373
 374
 375
 376
 377 =head2 Object Methods
 378
 379 These are read-only accessors for the various attributes of a preference.
 380
 381 =head3 $pref->id
 382
 383 =cut
 384
 385 =head3 $pref->branchcode
 386
 387 =cut
 388
 389 =head3 $pref->categorycode
 390
 391 =cut
 392
 393 =head3 $pref->item_type
 394
 395 =cut
 396
 397 =head3 $pref->notification
 398
 399 =cut
 400
 401 sub AUTOLOAD {
 402     my $self = shift;
 403     my $attr = $AUTOLOAD;
 404     $attr =~ s/.*://;
 405     if (exists $self->{$attr}) {
 406         return $self->{$attr};
 407     } else {
 408         return;
 409     }
 410 }
 411
 412 sub DESTROY { }
 413
 414
 415
 416 =head1 SEE ALSO
 417
 418 L<C4::Circulation>, F<admin/item_circulation_alerts.pl>
 419
 420 =head1 AUTHOR
 421
 422 John Beppu <john.beppu@liblime.com>
 423
 424 =cut
 425
 426 1;