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package Dancer::Plugin::FlashNote; |
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{ |
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$Dancer::Plugin::FlashNote::VERSION = '1.0.4'; |
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} |
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# ABSTRACT: support notifications in your Dancer web application |
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449288
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use strict; |
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50
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15
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655
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use warnings; |
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use Carp; |
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use Dancer ':syntax'; |
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393404
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use Dancer::Plugin; |
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22453
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19162
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14
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my $conf = plugin_setting; |
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my %is_allowed_setting = map { $_ => 1 } |
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qw( token_name session_hash_key queue arguments dequeue ); |
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if (my @extra = grep { !$is_allowed_setting{$_} } keys %$conf) { |
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croak __PACKAGE__ . ": invalid configuration keys (@extra)"; |
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} |
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my $token_name = $conf->{token_name} || 'flash'; |
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my $session_hash_key = $conf->{session_hash_key} || '_flash'; |
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my $queue = $conf->{queue} || 'multiple'; |
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my $arguments = $conf->{arguments} || 'auto'; |
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my $dequeue = $conf->{dequeue} || 'when_used'; |
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$arguments =~ m{\A(?: single | join | auto | array )\z}mxs |
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or croak "invalid arguments setting '$arguments'"; |
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sub _get_parameters { |
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42
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100
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313
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if ($arguments eq 'single') { return shift } |
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1
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3
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100
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3
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100
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elsif ($arguments eq 'join') { return join $, || '', @_ } |
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3
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elsif ($arguments eq 'array') { return [@_] } |
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136
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return @_ > 1 ? [@_] : shift; |
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} ## end sub _get_parameters |
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if ($queue eq 'single') { |
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register flash => sub { |
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14
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14
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70018
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my $value = _get_parameters(@_); |
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14
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46
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session $session_hash_key, $value; |
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14
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59
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return $value; |
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}; |
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} ## end if ($queue eq 'single') |
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elsif ($queue eq 'multiple') { |
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register flash => sub { |
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28
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85501
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my $value = _get_parameters(@_); |
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49
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28
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100
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117
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my $flash = session($session_hash_key) || []; |
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50
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28
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6500
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push @$flash, $value; |
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51
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8
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27
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session($session_hash_key, $flash); |
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52
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8
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1310
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return $value; |
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53
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}; |
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54
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} ## end elsif ($queue eq 'multiple') |
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55
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elsif ($queue eq 'key_single') { |
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56
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register flash => sub { |
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57
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14
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3706
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my $key = shift; |
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58
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14
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50
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my $value = _get_parameters(@_); |
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59
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14
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100
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1230
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my $flash = session($session_hash_key) || {}; |
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60
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6
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1214
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$flash->{$key} = $value; |
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61
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session($session_hash_key, $flash); |
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62
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return $value; |
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63
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}; |
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64
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} ## end elsif ($queue eq 'key_single') |
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65
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elsif ($queue eq 'key_multiple') { |
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66
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register flash => sub { |
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67
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my $key = shift; |
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68
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my $value = _get_parameters(@_); |
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69
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my $flash = session($session_hash_key) || {}; |
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70
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push @{$flash->{$key}}, $value; |
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71
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session($session_hash_key, $flash); |
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72
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return $value; |
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73
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}; |
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74
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} ## end elsif ($queue eq 'key_multiple') |
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75
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else { |
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76
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croak "invalid queueing style '$queue'"; |
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77
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} |
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78
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79
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if ($dequeue eq 'by_key' and $queue !~ m{\Akey_}mxs) { |
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80
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croak "dequeuing style 'by_key' only available " |
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81
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. "with 'key_*' queueing styles"; |
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82
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} |
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83
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if ($dequeue eq 'always') { |
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84
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hook after => sub { |
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85
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session $session_hash_key, undef; |
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86
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}; |
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87
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} |
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88
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my $template_sub = { |
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89
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never => sub { |
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90
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shift->{$token_name} = session $session_hash_key; |
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91
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return; |
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92
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}, |
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93
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always => sub { |
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94
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shift->{$token_name} = session $session_hash_key; |
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95
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return; |
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96
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}, |
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97
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when_used => sub { |
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98
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my $cache; |
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99
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shift->{$token_name} = sub { |
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100
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if (!$cache) { |
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101
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$cache = session $session_hash_key; |
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102
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session $session_hash_key, undef; |
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103
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} |
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104
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return $cache; |
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105
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}; |
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106
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return; |
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107
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}, |
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108
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by_key => sub { |
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109
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my $flash = session($session_hash_key) || {}; |
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110
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shift->{$token_name} = { |
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111
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map { |
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112
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my $key = $_; |
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113
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my $cache; |
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114
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$key => sub { |
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115
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if (!$cache) { |
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116
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$cache = delete $flash->{$key}; |
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117
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} |
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118
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return $cache; |
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119
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}; |
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120
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} keys %$flash, |
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121
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}; |
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122
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}, |
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123
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}->{$dequeue} |
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124
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or croak "invalid dequeuing style '$dequeue'"; |
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125
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hook before_template => $template_sub; |
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126
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127
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register flash_flush => sub { |
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128
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2
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2
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2883
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my $flash = session $session_hash_key; |
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129
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2
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50
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344
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return unless defined $flash; |
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130
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2
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50
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33
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12
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if ((ref($flash) eq 'HASH') && @_) { |
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131
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0
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0
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my @values = map { delete $flash->{$_} } @_; |
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0
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0
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132
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0
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0
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0
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return unless defined wantarray(); |
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133
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0
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0
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0
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return $values[0] unless wantarray(); |
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134
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0
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0
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return @values; |
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135
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} ## end if ((ref($flash) eq 'HASH'... |
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136
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else { |
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137
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2
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5
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session $session_hash_key, undef; |
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138
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2
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283
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return $flash; |
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139
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} |
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140
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}; |
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141
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142
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register_plugin; |
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143
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144
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1; |
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145
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146
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147
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148
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=pod |
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149
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150
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=head1 NAME |
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151
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152
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Dancer::Plugin::FlashNote - support notifications in your Dancer web application |
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153
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|
154
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|
=head1 VERSION |
|
155
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|
156
|
|
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|
|
|
|
version 1.0.4 |
|
157
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158
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=head1 SYNOPSIS |
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159
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|
160
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# In the configuration you choose a "flash style", e.g. |
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161
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# notifications stored in an array and automatically |
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162
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# removed from the session when used |
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163
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plugins: |
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164
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FlashNote: |
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165
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queue: multiple |
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166
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dequeue: when_used |
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167
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168
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169
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# In the application you generate flash notifications |
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170
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package MyWebService; |
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171
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172
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use Dancer; |
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173
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use Dancer::Plugin::FlashNote; |
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174
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175
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get '/hello/:id/:who' => sub { |
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176
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flash 'A first error message' |
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177
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unless params->{id} =~ /\A\d+\z/mxs; |
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178
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flash 'A second error message' |
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179
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unless params->{who} =~ /\A(?: you | me )\z/mxs; |
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180
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# ... |
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181
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template 'index'; |
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182
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}; |
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183
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184
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185
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# Then, in the layout you consume them and they are flushed |
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186
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<% IF flash %> |
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187
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188
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<% FOR notice = flash %> |
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189
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<% notice | html %> |
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190
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<% END %> |
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191
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192
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<% END %> |
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193
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194
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|
|
=head1 DESCRIPTION |
|
195
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|
196
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|
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This plugin helps you display temporary messages, so called "flash messages". |
|
197
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It provides a C method to define the message. The plugin then takes |
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198
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care of attaching the content to the session, propagating it to the templating |
|
199
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|
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system, and then removing it from the session. On the other hand, you still |
|
200
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have to take care to find a suitable place to put the messages. |
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201
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202
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|
=head2 Dancer::Plugin::FlashMessage |
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203
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204
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This plugin originages from L by |
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Damien "dams" Krotkine. While I appreciated the idea and the implementation, |
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I felt that the way of use did not fit my needs and after some discussion |
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we decided to go for different modules: he would retain only the one |
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208
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single behaviour that he thought was the best, and I would implement the |
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different variations. I learned a lot from the discussion, so beware: the |
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Dancer people can teach you a lot! |
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212
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This configuration should give you a behaviour equivalent to |
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L: |
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215
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plugins: |
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FlashNote: |
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queue: key_single |
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arguments: single |
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dequeue: by_key |
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221
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but if you need it you can probably stick to L. |
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Also note that with the configuration above the C function will |
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not work in the same way as L when called |
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with only one parameter: in dams' module this kind of call deletes the |
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value associated to the key, in this module this just pushes an undef |
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message. |
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=head2 Styles |
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230
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Dancer::Plugin::FlashNote lets you decide the I |