1 | use strict; |
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2 | use warnings; |
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3 | |
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4 | # Helper completers for filters |
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5 | package BarnOwl::Complete::Filter; |
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6 | |
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7 | use base qw(Exporter); |
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8 | our @EXPORT_OK = qw(complete_filter_name complete_filter_expr); |
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9 | |
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10 | # Completes the name of a filter |
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11 | sub complete_filter_name { return @{BarnOwl::all_filters()}; } |
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12 | |
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13 | # Completes a filter expression |
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14 | sub complete_filter_expr { |
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15 | my $ctx = shift; |
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16 | |
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17 | my @completions = (); |
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18 | _complete_filter_expr($ctx, 0, \@completions); |
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19 | # Get rid of duplicates and sort |
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20 | my %hash = (); |
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21 | @hash{@completions} = (); |
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22 | @completions = sort keys %hash; |
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23 | return @completions; |
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24 | } |
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25 | |
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26 | ### Private |
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27 | |
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28 | my %filter_cmds = ( |
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29 | sender => \&BarnOwl::Complete::Zephyr::complete_user, |
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30 | recipient => \&BarnOwl::Complete::Zephyr::complete_user, |
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31 | class => \&BarnOwl::Complete::Zephyr::complete_class, |
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32 | instance => \&BarnOwl::Complete::Zephyr::complete_instance, |
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33 | opcode => \&BarnOwl::Complete::Zephyr::complete_opcode, |
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34 | realm => \&BarnOwl::Complete::Zephyr::complete_realm, |
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35 | body => undef, |
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36 | hostname => undef, |
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37 | type => sub { qw(zephyr aim admin); }, |
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38 | direction => sub { qw(in out none); }, |
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39 | login => sub { qw(login logout none); }, |
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40 | filter => \&complete_filter_name, |
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41 | perl => undef, |
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42 | deleted => sub { qw(true false); }, |
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43 | ); |
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44 | |
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45 | # Returns: |
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46 | # - where to look next after pulling out an expression |
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47 | # - $INCOMPLETE if this cannot form a complete expression (or w/e) |
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48 | # - pushes to completion list as it finds valid completions |
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49 | |
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50 | my $INCOMPLETE = -1; |
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51 | sub _complete_filter_expr { |
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52 | # Takes as arguments context and the index into $ctx->words where the |
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53 | # filter expression starts |
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54 | my $ctx = shift; |
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55 | my $start = shift; |
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56 | my $o_comp = shift; |
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57 | my $end = $ctx->word; |
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58 | |
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59 | # Grab an expression; we don't allow empty |
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60 | my $i = $start; |
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61 | $i = _complete_filter_primitive_expr($ctx, $start, $o_comp); |
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62 | return $INCOMPLETE if $i == $INCOMPLETE; |
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63 | |
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64 | while ($i <= $end) { |
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65 | if ($i == $end) { |
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66 | # We could and/or another clause |
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67 | push @$o_comp, qw(and or); |
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68 | return $end; # Or we could let the parent do his thing |
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69 | } |
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70 | |
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71 | if ($ctx->words->[$i] ne 'and' && $ctx->words->[$i] ne 'or') { |
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72 | return $i; # We're done. Let the parent do his thing |
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73 | } |
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74 | |
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75 | # Eat the and/or |
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76 | $i++; |
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77 | |
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78 | # Grab an expression |
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79 | $i = _complete_filter_primitive_expr($ctx, $i, $o_comp); |
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80 | return $INCOMPLETE if $i == $INCOMPLETE; |
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81 | } |
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82 | |
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83 | return $i; # Well, it looks like we're happy |
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84 | # (Actually, I'm pretty sure this never happens...) |
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85 | } |
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86 | |
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87 | sub _complete_filter_primitive_expr { |
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88 | my $ctx = shift; |
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89 | my $start = shift; |
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90 | my $o_comp = shift; |
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91 | my $end = $ctx->word; |
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92 | |
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93 | if ($start >= $end) { |
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94 | push @$o_comp, "("; |
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95 | push @$o_comp, qw(true false not); |
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96 | push @$o_comp, keys %filter_cmds; |
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97 | return $INCOMPLETE; |
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98 | } |
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99 | |
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100 | my $word = $ctx->words->[$start]; |
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101 | if ($word eq "(") { |
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102 | $start = _complete_filter_expr($ctx, $start+1, $o_comp); |
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103 | return $INCOMPLETE if $start == $INCOMPLETE; |
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104 | |
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105 | # Now, we expect a ")" |
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106 | if ($start >= $end) { |
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107 | push @$o_comp, ")"; |
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108 | return $INCOMPLETE; |
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109 | } |
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110 | if ($ctx->words->[$start] ne ')') { |
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111 | # User is being confusing. Give up. |
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112 | return $INCOMPLETE; |
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113 | } |
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114 | return $start+1; # Eat the ) |
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115 | } elsif ($word eq "not") { |
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116 | # We just want another primitive expression |
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117 | return _complete_filter_primitive_expr($ctx, $start+1, $o_comp); |
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118 | } elsif ($word eq "true" || $word eq "false") { |
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119 | # No arguments |
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120 | return $start+1; # Eat the boolean. Mmmm, tasty. |
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121 | } else { |
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122 | # It's of the form 'CMD ARG' |
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123 | return $start+2 if ($start+1 < $end); # The user supplied the argument |
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124 | |
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125 | # complete the argument |
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126 | my $arg_func = $filter_cmds{$word}; |
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127 | push @$o_comp, ($arg_func ? ($arg_func->()) : ()); |
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128 | return $INCOMPLETE; |
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129 | } |
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130 | } |
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