C4/ItemCirculationAlertPreference.pm

   1 package C4::ItemCirculationAlertPreference;
   2
   3 # This file is part of Koha.
   4 #
   5 # Koha is free software; you can redistribute it and/or modify it under the
   6 # terms of the GNU General Public License as published by the Free Software
   7 # Foundation; either version 2 of the License, or (at your option) any later
   8 # version.
   9 #
  10 # Koha is distributed in the hope that it will be useful, but WITHOUT ANY
  11 # WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  12 # A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License along with
  15 # Koha; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
  16 # Suite 330, Boston, MA  02111-1307 USA
  17
  18 use strict;
  19 use warnings;
  20 use C4::Context;
  21 use C4::Category;
  22 use C4::ItemType;
  23 use Carp qw(carp croak);
  24
  25 our $AUTOLOAD;
  26
  27 # helper function for validating \%opts
  28 our $valid = sub {
  29     my $opts = shift;
  30     for (qw(branchcode categorycode item_type notification)) {
  31         exists($opts->{$_}) || croak("'$_' is a required parameter.");
  32     }
  33 };
  34
  35
  36
  37
  38 =head1 NAME
  39
  40 C4::ItemCirculationAlertPreference - manage preferences for sending alerts
  41
  42 =head1 SYNOPSIS
  43
  44 Basics:
  45
  46     use C4::ItemCirculationAlertPreference;
  47
  48     # a short-cut to reduce typing the long package name over and over again
  49     my $preferences = 'C4::ItemCirculationAlertPreference';
  50
  51 Creating a restriction on sending messages:
  52
  53     my $pref = $preferences->create({
  54         branchcode   => 'CPL',
  55         categorycode => 'YA',
  56         item_type    => 'BK',
  57         notification => 'CHECKOUT',
  58     });
  59
  60 Removing a restriction on sending messages:
  61
  62     $preferences->delete({
  63         branchcode   => 'CPL',
  64         categorycode => 'YA',
  65         item_type    => 'BK',
  66         notification => 'CHECKOUT',
  67     });
  68
  69 =head1 DESCRIPTION
  70
  71 This class is used to manage the preferences for when an alert may be sent.  By
  72 default, item circulation alerts are enabled for every B<branch>, B<patron
  73 category> and B<item type>.
  74
  75 However, if you would like to prevent item circulation alerts from being sent
  76 for any combination of these 3 variables, a preference can be inserted into the
  77 C<item_circulation_alert_preferences> table to make that a policy.
  78
  79 =head1 API
  80
  81 =head2 Class Methods
  82
  83 =cut
  84
  85 =head3 C4::ItemCirculationAlertPreference->new(\%opts)
  86
  87 This is a constructor for an in-memory C4::ItemCirculationAlertPreference
  88 object.  The database is not affected by this method.
  89
  90 =cut
  91
  92 sub new {
  93     my ($class, $opts) = @_;
  94     bless $opts => $class;
  95 }
  96
  97
  98
  99
 100 =head3 C4::ItemCirculationAlertPreference->create(\%opts)
 101
 102 This will find or create an item circulation alert preference.  You must pass
 103 it a B<branchcode>, B<categorycode>, B<item_type>, and B<notification>.  Valid
 104 values for these attributes are as follows:
 105
 106 =over 4
 107
 108 =item branchcode
 109
 110 branches.branchcode
 111
 112 =item categorycode
 113
 114 category.categorycode
 115
 116 =item item_type
 117
 118 itemtypes.itemtype
 119
 120 =item notification
 121
 122 This can be "CHECKIN" or "CHECKOUT"
 123
 124 =back
 125
 126 =cut
 127
 128 sub create {
 129     my ($class, $opts) = @_;
 130     $valid->($opts);
 131     my $dbh = C4::Context->dbh;
 132     my $prefs = $dbh->selectall_arrayref(
 133         "SELECT id, branchcode, categorycode, item_type
 134         FROM  item_circulation_alert_preferences
 135         WHERE branchcode   = ?
 136         AND   categorycode = ?
 137         AND   item_type    = ?
 138         AND   notification = ?",
 139         { Slice => {} },
 140         $opts->{branchcode},
 141         $opts->{categorycode},
 142         $opts->{item_type},
 143         $opts->{notification},
 144     );
 145     if (@$prefs) {
 146         return $class->new($prefs->[0]);
 147     } else {
 148         my $success = $dbh->do(
 149             "INSERT INTO item_circulation_alert_preferences
 150             (branchcode, categorycode, item_type, notification) VALUES (?, ?, ?, ?)",
 151             {},
 152             $opts->{branchcode},
 153             $opts->{categorycode},
 154             $opts->{item_type},
 155             $opts->{notification},
 156         );
 157         if ($success) {
 158             my $self = {
 159                 id           => $dbh->last_insert_id(undef, undef, undef, undef),
 160                 branchcode   => $opts->{branchcode},
 161                 categorycode => $opts->{categorycode},
 162                 item_type    => $opts->{item_type},
 163                 notification => $opts->{notification},
 164             };
 165             return $class->new($self);
 166         } else {
 167             carp $dbh->errstr;
 168             return undef;
 169         }
 170     }
 171 }
 172
 173
 174
 175
 176 =head3 C4::ItemCirculationAlertPreference->delete(\%opts)
 177
 178 Delete an item circulation alert preference.  You can delete by either passing
 179 in an B<id> or passing in a B<branchcode>, B<categorycode>, B<item_type>
 180 triplet.
 181
 182 =cut
 183
 184 sub delete {
 185     my ($class, $opts) = @_;
 186     my $dbh = C4::Context->dbh;
 187     if ($opts->{id}) {
 188         $dbh->do(
 189             "DELETE FROM item_circulation_alert_preferences WHERE id = ?",
 190             {},
 191             $opts->{id}
 192         );
 193     } else {
 194         $valid->($opts);
 195         my $sql =
 196             "DELETE FROM item_circulation_alert_preferences
 197             WHERE branchcode   = ?
 198             AND   categorycode = ?
 199             AND   item_type    = ?
 200             AND   notification = ?";
 201         $dbh->do(
 202             $sql,
 203             {},
 204             $opts->{branchcode},
 205             $opts->{categorycode},
 206             $opts->{item_type},
 207             $opts->{notification},
 208         );
 209     }
 210 }
 211
 212
 213
 214
 215 =head3 C4::ItemCirculationAlertPreference->is_enabled_for(\%opts)
 216
 217 Based on the existing preferences in the C<item_circulation_alert_preferences>
 218 table, can an alert be sent for the given B<branchcode>, B<categorycode>, and
 219 B<itemtype>?
 220
 221 B<Example>:
 222
 223     my $alert = 'C4::ItemCirculationAlertPreference';
 224     my $conditions = {
 225         branchcode   => 'CPL',
 226         categorycode => 'IL',
 227         item_type    => 'MU',
 228     };
 229
 230     if ($alert->is_enabled_for($conditions)) {
 231         # ...
 232     }
 233
 234 =cut
 235
 236 sub is_disabled_for {
 237     my ($class, $opts) = @_;
 238     $valid->($opts);
 239     my $dbh = C4::Context->dbh;
 240
 241     # Does a preference exist to block this alert?
 242     my $query = qq{
 243         SELECT id, branchcode, categorycode, item_type, notification
 244           FROM item_circulation_alert_preferences
 245          WHERE (branchcode   = ? OR branchcode   = '*')
 246            AND (categorycode = ? OR categorycode = '*')
 247            AND (item_type    = ? OR item_type    = '*')
 248            AND (notification = ? OR notification = '*')
 249     };
 250
 251     my $preferences = $dbh->selectall_arrayref(
 252         $query,
 253         { Slice => {} },
 254         $opts->{branchcode},
 255         $opts->{categorycode},
 256         $opts->{item_type},
 257         $opts->{notification},
 258     );
 259
 260     # If any preferences showed up, we are NOT enabled.
 261     return @$preferences;
 262 }
 263
 264 sub is_enabled_for {
 265     my ($class, $opts) = @_;
 266     return not $class->is_disabled_for($opts);
 267 }
 268
 269
 270
 271
 272 =head3 C4::ItemCirculationAlertPreference->find({ branchcode => $bc, notification => $type })
 273
 274 This method returns all the item circulation alert preferences for a given
 275 branch and notification.
 276
 277 B<Example>:
 278
 279     my @branch_prefs = C4::ItemCirculationAlertPreference->find({
 280         branchcode   => 'CPL',
 281         notification => 'CHECKIN',
 282     });
 283
 284 =cut
 285
 286 sub find {
 287     my ($class, $where) = @_;
 288     my $dbh = C4::Context->dbh;
 289     my $query = qq{
 290         SELECT id, branchcode, categorycode, item_type, notification
 291           FROM item_circulation_alert_preferences
 292          WHERE branchcode = ? AND notification = ?
 293          ORDER BY categorycode, item_type
 294     };
 295     return    map { $class->new($_) }    @{$dbh->selectall_arrayref(
 296         $query,
 297         { Slice => {} },
 298         $where->{branchcode},
 299         $where->{notification},
 300     )};
 301 }
 302
 303
 304
 305
 306 =head3 C4::ItemCirculationAlertPreference->grid({ branchcode => $c, notification => $type })
 307
 308 Return a 2D arrayref for the grid view in F<admin/item_circulation_alert_preferences.pl>.
 309 Each row represents a category (like 'Patron' or 'Young Adult') and
 310 each column represents an itemtype (like 'Book' or 'Music').
 311
 312 Each cell contains...
 313
 314 B<Example>:
 315
 316     use Data::Dump 'pp';
 317     my $grid = C4::ItemCirculationAlertPreference->grid({
 318         branchcode   => 'CPL',
 319         notification => 'CHECKOUT',
 320     });
 321     warn pp($grid);
 322
 323 See F<admin/item_circulation_alerts.pl> to see how this method is used.
 324
 325 =cut
 326
 327 sub grid {
 328     my ($class, $where) = @_;
 329     my @branch_prefs = $class->find($where);
 330     my @default_prefs = $class->find({ branchcode => '*', notification => $where->{notification} });
 331     my @cc = C4::Category->all;
 332     my @it = C4::ItemType->all;
 333     my $notification = $where->{notification};
 334     my %disabled = map {
 335         my $key = $_->categorycode . "-" . $_->item_type . "-" . $notification;
 336         $key =~ s/\*/_/g;
 337         ($key => 1);
 338     } @branch_prefs;
 339     my %default = map {
 340         my $key = $_->categorycode . "-" . $_->item_type . "-" . $notification;
 341         $key =~ s/\*/_/g;
 342         ($key => 1);
 343     } @default_prefs;
 344     my @grid;
 345     for my $c (@cc) {
 346         my $row = { description => $c->description, items => [] };
 347         push @grid, $row;
 348         for my $i (@it) {
 349             my $key = $c->categorycode . "-" . $i->itemtype . "-" . $notification;
 350             $key =~ s/\*/_/g;
 351             my @classes;
 352             my $text = " ";
 353             if ($disabled{$key}) {
 354                 push @classes, 'disabled';
 355                 $text = "Disabled for $where->{branchcode}";
 356             }
 357             if ($default{$key}) {
 358                 push @classes, 'default';
 359                 $text = "Disabled for all";
 360             }
 361             push @{$row->{items}}, {
 362                 class => join(' ', @classes),
 363                 id    => $key,
 364                 text  => $text,
 365             };
 366         }
 367     }
 368     return \@grid;
 369 }
 370
 371
 372
 373
 374 =head2 Object Methods
 375
 376 These are read-only accessors for the various attributes of a preference.
 377
 378 =head3 $pref->id
 379
 380 =cut
 381
 382 =head3 $pref->branchcode
 383
 384 =cut
 385
 386 =head3 $pref->categorycode
 387
 388 =cut
 389
 390 =head3 $pref->item_type
 391
 392 =cut
 393
 394 =head3 $pref->notification
 395
 396 =cut
 397
 398 sub AUTOLOAD {
 399     my $self = shift;
 400     my $attr = $AUTOLOAD;
 401     $attr =~ s/.*://;
 402     if (exists $self->{$attr}) {
 403         return $self->{$attr};
 404     } else {
 405         return undef;
 406     }
 407 }
 408
 409 sub DESTROY { }
 410
 411
 412
 413 =head1 SEE ALSO
 414
 415 L<C4::Circulation>, F<admin/item_circulation_alerts.pl>
 416
 417 =head1 AUTHOR
 418
 419 John Beppu <john.beppu@liblime.com>
 420
 421 =cut
 422
 423 1;