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Original Path: trunk/webwork-modperl/lib/WeBWorK/Utils.pm
| 1 : | sh002i | 440 | ################################################################################ |
| 2 : | sh002i | 494 | # WeBWorK mod_perl (c) 2000-2002 WeBWorK Project |
| 3 : | sh002i | 440 | # $Id$ |
| 4 : | ################################################################################ | ||
| 5 : | |||
| 6 : | sh002i | 410 | package WeBWorK::Utils; |
| 7 : | |||
| 8 : | sh002i | 455 | =head1 NAME |
| 9 : | |||
| 10 : | WeBWorK::Utils - useful utilities used by other WeBWorK modules. | ||
| 11 : | |||
| 12 : | =cut | ||
| 13 : | |||
| 14 : | sh002i | 412 | use strict; |
| 15 : | use warnings; | ||
| 16 : | sh002i | 440 | use base qw(Exporter); |
| 17 : | sh002i | 412 | use Date::Format; |
| 18 : | use Date::Parse; | ||
| 19 : | |||
| 20 : | sh002i | 410 | our @EXPORT = (); |
| 21 : | sh002i | 424 | our @EXPORT_OK = qw( |
| 22 : | runtime_use | ||
| 23 : | readFile | ||
| 24 : | formatDateTime | ||
| 25 : | parseDateTime | ||
| 26 : | sh002i | 562 | writeLog |
| 27 : | writeTimingLogEntry | ||
| 28 : | sh002i | 427 | dbDecode |
| 29 : | dbEncode | ||
| 30 : | sh002i | 429 | decodeAnswers |
| 31 : | encodeAnswers | ||
| 32 : | sh002i | 424 | ref2string |
| 33 : | ); | ||
| 34 : | sh002i | 410 | |
| 35 : | sub runtime_use($) { | ||
| 36 : | return unless @_; | ||
| 37 : | sh002i | 424 | eval "package Main; require $_[0]; import $_[0]"; |
| 38 : | sh002i | 410 | die $@ if $@; |
| 39 : | } | ||
| 40 : | |||
| 41 : | sub readFile($) { | ||
| 42 : | my $fileName = shift; | ||
| 43 : | sh002i | 558 | local *INPUTFILE; |
| 44 : | sh002i | 410 | open INPUTFILE, "<", $fileName |
| 45 : | or die "Failed to read $fileName: $!"; | ||
| 46 : | local $/ = undef; | ||
| 47 : | my $result = <INPUTFILE>; | ||
| 48 : | close INPUTFILE; | ||
| 49 : | return $result; | ||
| 50 : | } | ||
| 51 : | sh002i | 412 | |
| 52 : | sub formatDateTime($) { | ||
| 53 : | my $dateTime = shift; | ||
| 54 : | sh002i | 558 | # "standard" WeBWorK date/time format (for set definition files): |
| 55 : | sh002i | 412 | # %m month number, starting with 01 |
| 56 : | # %d numeric day of the month, with leading zeros (eg 01..31) | ||
| 57 : | # %y year (2 digits) | ||
| 58 : | # %I hour, 12 hour clock, leading 0's) | ||
| 59 : | # %M minute, leading 0's | ||
| 60 : | # %P am or pm (Yes %p and %P are backwards :) | ||
| 61 : | sh002i | 562 | return time2str("%m/%d/%y %I:%M%P", $dateTime); |
| 62 : | sh002i | 412 | } |
| 63 : | |||
| 64 : | sub parseDateTime($) { | ||
| 65 : | sh002i | 424 | my $string = shift; |
| 66 : | sh002i | 412 | return str2time $string; |
| 67 : | } | ||
| 68 : | sh002i | 422 | |
| 69 : | sh002i | 562 | sub writeLog($$@) { |
| 70 : | my ($ce, $facility, @message) = @_; | ||
| 71 : | unless ($ce->{webworkFiles}->{logs}->{$facility}) { | ||
| 72 : | warn "There is no log file for the $facility facility defined.\n"; | ||
| 73 : | return; | ||
| 74 : | } | ||
| 75 : | my $logFile = $ce->{webworkFiles}->{logs}->{$facility}; | ||
| 76 : | local *LOG; | ||
| 77 : | if (open LOG, ">>", $logFile) { | ||
| 78 : | print LOG "[", time2str("%a %b %d %H:%M:%S %Y", time), "] @message\n"; | ||
| 79 : | close LOG; | ||
| 80 : | } else { | ||
| 81 : | warn "failed to open $logFile for writing: $!"; | ||
| 82 : | } | ||
| 83 : | } | ||
| 84 : | sh002i | 558 | |
| 85 : | sh002i | 562 | sub writeTimingLogEntry($$$$) { |
| 86 : | my ($ce, $function, $details, $beginEnd) = @_; | ||
| 87 : | return unless defined $ce->{webworkFiles}->{logs}->{timing}; | ||
| 88 : | $beginEnd = ($beginEnd eq "begin") ? ">" : "<"; | ||
| 89 : | writeLog($ce, "timing", "$$ ".time." $beginEnd $function [$details]"); | ||
| 90 : | } | ||
| 91 : | |||
| 92 : | sh002i | 429 | # ----- |
| 93 : | |||
| 94 : | sh002i | 427 | sub dbDecode($) { |
| 95 : | my $string = shift; | ||
| 96 : | return unless defined $string and $string; | ||
| 97 : | my %hash = $string =~ /(.*?)(?<!\\)=(.*?)(?:(?<!\\)&|$)/g; | ||
| 98 : | sh002i | 429 | $hash{$_} =~ s/\\(&|=)/$1/g foreach keys %hash; # unescape & and = |
| 99 : | sh002i | 427 | return %hash; |
| 100 : | } | ||
| 101 : | |||
| 102 : | sub dbEncode(@) { | ||
| 103 : | my %hash = @_; | ||
| 104 : | my $string; | ||
| 105 : | foreach (keys %hash) { | ||
| 106 : | $hash{$_} = "" unless defined $hash{$_}; # promote undef to "" | ||
| 107 : | $hash{$_} =~ s/(=|&)/\\$1/g; # escape & and = | ||
| 108 : | $string .= "$_=$hash{$_}&"; | ||
| 109 : | } | ||
| 110 : | chop $string; # remove final '&' from string for old code :p | ||
| 111 : | return $string; | ||
| 112 : | } | ||
| 113 : | |||
| 114 : | sh002i | 429 | sub decodeAnswers($) { |
| 115 : | my $string = shift; | ||
| 116 : | return unless defined $string and $string; | ||
| 117 : | my @array = split m/##/, $string; | ||
| 118 : | $array[$_] =~ s/\\#\\/#/g foreach 0 .. $#array; | ||
| 119 : | sh002i | 445 | push @array, "" if @array%2; |
| 120 : | sh002i | 429 | return @array; # it's actually a hash ;) |
| 121 : | } | ||
| 122 : | |||
| 123 : | sub encodeAnswers(\%\@) { | ||
| 124 : | my %hash = %{ shift() }; | ||
| 125 : | my @order = @{ shift() }; | ||
| 126 : | my $string; | ||
| 127 : | foreach my $name (@order) { | ||
| 128 : | my $value = defined $hash{$name} ? $hash{$name} : ""; | ||
| 129 : | $name =~ s/#/\\#\\/g; # this is a WEIRD way to escape things | ||
| 130 : | $value =~ s/#/\\#\\/g; # and it's not my fault! | ||
| 131 : | $string .= "$name##$value##"; # this is also not my fault | ||
| 132 : | } | ||
| 133 : | $string =~ s/##$//; # remove last pair of hashs | ||
| 134 : | return $string; | ||
| 135 : | } | ||
| 136 : | |||
| 137 : | sh002i | 424 | # ----- |
| 138 : | sh002i | 422 | |
| 139 : | sh002i | 424 | sub ref2string($;$); |
| 140 : | sub ref2string($;$) { | ||
| 141 : | my $ref = shift; | ||
| 142 : | my $dontExpand = shift || {}; | ||
| 143 : | my $refType = ref $ref; | ||
| 144 : | sh002i | 422 | my $result; |
| 145 : | sh002i | 424 | if ($refType and not $dontExpand->{$refType}) { |
| 146 : | my $baseType = refBaseType($ref); | ||
| 147 : | $result .= '<font size="1" color="grey">' . $refType; | ||
| 148 : | sh002i | 425 | $result .= " ($baseType)" if $baseType and $refType ne $baseType; |
| 149 : | sh002i | 424 | $result .= ":</font><br>"; |
| 150 : | $result .= '<table border="1" cellpadding="2">'; | ||
| 151 : | if ($baseType eq "HASH") { | ||
| 152 : | my %hash = %$ref; | ||
| 153 : | foreach (sort keys %hash) { | ||
| 154 : | $result .= '<tr valign="top">'; | ||
| 155 : | $result .= "<td>$_</td>"; | ||
| 156 : | $result .= "<td>" . ref2string($hash{$_}, $dontExpand) . "</td>"; | ||
| 157 : | $result .= "</tr>"; | ||
| 158 : | } | ||
| 159 : | } elsif ($baseType eq "ARRAY") { | ||
| 160 : | my @array = @$ref; | ||
| 161 : | sh002i | 429 | # special case for Problem, Set, and User objects, which are defined |
| 162 : | # using lists and contain a @FIELDS package variable: | ||
| 163 : | no strict 'refs'; | ||
| 164 : | my @FIELDS = eval { @{$refType."::FIELDS"} }; | ||
| 165 : | use strict 'refs'; | ||
| 166 : | undef @FIELDS unless scalar @FIELDS == scalar @array and not $@; | ||
| 167 : | sh002i | 424 | foreach (0 .. $#array) { |
| 168 : | $result .= '<tr valign="top">'; | ||
| 169 : | $result .= "<td>$_</td>"; | ||
| 170 : | sh002i | 429 | $result .= "<td>".$FIELDS[$_]."</td>" if @FIELDS; |
| 171 : | sh002i | 424 | $result .= "<td>" . ref2string($array[$_], $dontExpand) . "</td>"; |
| 172 : | $result .= "</tr>"; | ||
| 173 : | } | ||
| 174 : | } elsif ($baseType eq "SCALAR") { | ||
| 175 : | my $scalar = $$ref; | ||
| 176 : | $result .= '<tr valign="top">'; | ||
| 177 : | $result .= "<td>$scalar</td>"; | ||
| 178 : | $result .= "</tr>"; | ||
| 179 : | sh002i | 422 | } else { |
| 180 : | sh002i | 424 | # perhaps a coderef? in any case, i don't feel like dealing with it! |
| 181 : | $result .= '<tr valign="top">'; | ||
| 182 : | $result .= "<td>$ref</td>"; | ||
| 183 : | $result .= "</tr>"; | ||
| 184 : | sh002i | 422 | } |
| 185 : | sh002i | 424 | $result .= "</table>" |
| 186 : | sh002i | 422 | } else { |
| 187 : | sh002i | 424 | $result .= defined $ref ? $ref : '<font color="red">undef</font>'; |
| 188 : | } | ||
| 189 : | sh002i | 422 | } |
| 190 : | |||
| 191 : | sh002i | 424 | sub refBaseType($) { |
| 192 : | my $ref = shift; | ||
| 193 : | local $SIG{__DIE__} = 'IGNORE'; | ||
| 194 : | return "HASH" if eval { $_ = %$ref; 1 }; | ||
| 195 : | return "ARRAY" if eval { $_ = @$ref; 1 }; | ||
| 196 : | return "SCALAR" if eval { $_ = $$ref; 1 }; | ||
| 197 : | return 0; | ||
| 198 : | sh002i | 422 | } |
| 199 : | |||
| 200 : | 1; |
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