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1 package IMPL::Web::Handler::ViewSelector;
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2 use strict;
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3
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4 use IMPL::lang qw(:declare :constants);
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5
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6 use IMPL::declare {
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7 require => {
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8 NotAcceptable => 'IMPL::Web::NotAcceptableException'
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9 },
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10 base => {
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11 'IMPL::Object' => undef,
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12 'IMPL::Object::Autofill' => '@_',
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13 'IMPL::Object::Serializable' => undef
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14 }
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15 };
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16
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17 BEGIN {
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18 public property views => PROP_ALL | PROP_LIST;
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19 public property fallback => PROP_ALL;
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20 public property types => PROP_ALL;
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21 }
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22
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23 sub Invoke {
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24 my ($this,$action,$next) = @_;
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25
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26 my $handler;
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27 my $path = $action->query->path_info;
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28
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29 if ($this->types and $path =~ m/\.(\w+)$/) {
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30 my $forced;
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31 if ($forced = $this->types->{$1} and $action->query->Accept($forced) ) {
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32 ($handler) = grep eval { $_->can('contentType') } && $_->contentType eq $forced, $this->views;
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33 }
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34 }
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35
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36 if (not $handler) {
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37
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38 my @handlers =
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39 sort {
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40 $b->{preference} <=> $a->{preference}
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41 } map {
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42 {
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43 handler => $_,
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44 preference =>
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45 eval { $_->can('contentType') } ? $action->query->Accept($_->contentType) : 0
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46 }
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47 } $this->views;
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48
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49 my $info = shift @handlers;
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50 $handler = $info ? $info->{handler} : undef;
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51
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52 }
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53
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54 die NotAcceptable->new(map { eval {$_->can('contentType') } ? $_->contentType : () } $this->views )
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55 unless $handler;
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56
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57 return $handler->Invoke($action,$next);
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58 }
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59
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60 1; |
