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| 1 : | sh002i | 440 | ################################################################################ |
| 2 : | sh002i | 1663 | # WeBWorK Online Homework Delivery System |
| 3 : | # Copyright © 2000-2003 The WeBWorK Project, http://openwebwork.sf.net/ | ||
| 4 : | sh002i | 1900 | # $CVSHeader: webwork-modperl/lib/WeBWorK/Utils.pm,v 1.37 2003/12/09 01:12:30 sh002i Exp $ |
| 5 : | sh002i | 1663 | # |
| 6 : | # This program is free software; you can redistribute it and/or modify it under | ||
| 7 : | # the terms of either: (a) the GNU General Public License as published by the | ||
| 8 : | # Free Software Foundation; either version 2, or (at your option) any later | ||
| 9 : | # version, or (b) the "Artistic License" which comes with this package. | ||
| 10 : | # | ||
| 11 : | # This program is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 : | # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS | ||
| 13 : | # FOR A PARTICULAR PURPOSE. See either the GNU General Public License or the | ||
| 14 : | # Artistic License for more details. | ||
| 15 : | sh002i | 440 | ################################################################################ |
| 16 : | |||
| 17 : | sh002i | 410 | package WeBWorK::Utils; |
| 18 : | sh002i | 818 | use base qw(Exporter); |
| 19 : | sh002i | 410 | |
| 20 : | sh002i | 455 | =head1 NAME |
| 21 : | |||
| 22 : | WeBWorK::Utils - useful utilities used by other WeBWorK modules. | ||
| 23 : | |||
| 24 : | =cut | ||
| 25 : | |||
| 26 : | sh002i | 412 | use strict; |
| 27 : | use warnings; | ||
| 28 : | sh002i | 1257 | #use Apache::DB; |
| 29 : | sh002i | 412 | use Date::Format; |
| 30 : | use Date::Parse; | ||
| 31 : | sh002i | 1145 | use Errno; |
| 32 : | sh002i | 1150 | use File::Path qw(rmtree); |
| 33 : | sh002i | 412 | |
| 34 : | sh002i | 1145 | use constant MKDIR_ATTEMPTS => 10; |
| 35 : | |||
| 36 : | sh002i | 410 | our @EXPORT = (); |
| 37 : | sh002i | 424 | our @EXPORT_OK = qw( |
| 38 : | runtime_use | ||
| 39 : | readFile | ||
| 40 : | sh002i | 1150 | readDirectory |
| 41 : | sh002i | 424 | formatDateTime |
| 42 : | parseDateTime | ||
| 43 : | sh002i | 562 | writeLog |
| 44 : | gage | 1387 | writeCourseLog |
| 45 : | sh002i | 562 | writeTimingLogEntry |
| 46 : | malsyned | 970 | list2hash |
| 47 : | max | ||
| 48 : | sh002i | 427 | dbDecode |
| 49 : | dbEncode | ||
| 50 : | sh002i | 429 | decodeAnswers |
| 51 : | encodeAnswers | ||
| 52 : | sh002i | 424 | ref2string |
| 53 : | sh002i | 1111 | sortByName |
| 54 : | sh002i | 1145 | makeTempDirectory |
| 55 : | sh002i | 1150 | removeTempDirectory |
| 56 : | sh002i | 1145 | pretty_print_rh |
| 57 : | malsyned | 1287 | cryptPassword |
| 58 : | sh002i | 1900 | dequote |
| 59 : | sh002i | 424 | ); |
| 60 : | sh002i | 410 | |
| 61 : | sub runtime_use($) { | ||
| 62 : | return unless @_; | ||
| 63 : | sh002i | 424 | eval "package Main; require $_[0]; import $_[0]"; |
| 64 : | sh002i | 410 | die $@ if $@; |
| 65 : | } | ||
| 66 : | |||
| 67 : | sh002i | 1257 | #sub backtrace { |
| 68 : | # my ($style) = @_; | ||
| 69 : | # $style = "warn" unless $style; | ||
| 70 : | # my @bt = DB->backtrace; | ||
| 71 : | # shift @bt; # Remove "backtrace" from the backtrace; | ||
| 72 : | # if ($style eq "die") { | ||
| 73 : | # die join "\n", @bt; | ||
| 74 : | # } elsif ($style eq "warn") { | ||
| 75 : | # warn join "\n", @bt; | ||
| 76 : | # } elsif ($style eq "print") { | ||
| 77 : | # print join "\n", @bt; | ||
| 78 : | # } elsif ($style eq "return") { | ||
| 79 : | # return @bt; | ||
| 80 : | # } | ||
| 81 : | #} | ||
| 82 : | malsyned | 1045 | |
| 83 : | sh002i | 410 | sub readFile($) { |
| 84 : | my $fileName = shift; | ||
| 85 : | sh002i | 1150 | local $/ = undef; # slurp the whole thing into one string |
| 86 : | open my $dh, "<", $fileName | ||
| 87 : | or die "failed to read file $fileName: $!"; | ||
| 88 : | my $result = <$dh>; | ||
| 89 : | close $dh; | ||
| 90 : | sh002i | 410 | return $result; |
| 91 : | } | ||
| 92 : | sh002i | 412 | |
| 93 : | malsyned | 974 | sub readDirectory($) { |
| 94 : | sh002i | 1150 | my $dirName = shift; |
| 95 : | opendir my $dh, $dirName | ||
| 96 : | sh002i | 1529 | or die "Failed to read directory $dirName: $!"; |
| 97 : | sh002i | 1150 | my @result = readdir $dh; |
| 98 : | close $dh; | ||
| 99 : | return @result; | ||
| 100 : | malsyned | 974 | } |
| 101 : | |||
| 102 : | sh002i | 412 | sub formatDateTime($) { |
| 103 : | my $dateTime = shift; | ||
| 104 : | sh002i | 558 | # "standard" WeBWorK date/time format (for set definition files): |
| 105 : | sh002i | 412 | # %m month number, starting with 01 |
| 106 : | # %d numeric day of the month, with leading zeros (eg 01..31) | ||
| 107 : | # %y year (2 digits) | ||
| 108 : | # %I hour, 12 hour clock, leading 0's) | ||
| 109 : | # %M minute, leading 0's | ||
| 110 : | # %P am or pm (Yes %p and %P are backwards :) | ||
| 111 : | gage | 1492 | #return time2str("%m/%d/%y %I:%M%P", $dateTime); |
| 112 : | gage | 1481 | return time2str("%m/%d/%y at %I:%M%P", $dateTime); |
| 113 : | sh002i | 412 | } |
| 114 : | |||
| 115 : | sub parseDateTime($) { | ||
| 116 : | sh002i | 424 | my $string = shift; |
| 117 : | gage | 1492 | # need to bring our string from "%m/%d/%y at %I:%M%P" to "%m/%d/%y %I:%M%P" format. |
| 118 : | $string =~ s/\bat\b/ /; | ||
| 119 : | sh002i | 737 | return str2time($string); |
| 120 : | sh002i | 412 | } |
| 121 : | sh002i | 422 | |
| 122 : | sh002i | 562 | sub writeLog($$@) { |
| 123 : | my ($ce, $facility, @message) = @_; | ||
| 124 : | unless ($ce->{webworkFiles}->{logs}->{$facility}) { | ||
| 125 : | warn "There is no log file for the $facility facility defined.\n"; | ||
| 126 : | return; | ||
| 127 : | } | ||
| 128 : | my $logFile = $ce->{webworkFiles}->{logs}->{$facility}; | ||
| 129 : | local *LOG; | ||
| 130 : | if (open LOG, ">>", $logFile) { | ||
| 131 : | print LOG "[", time2str("%a %b %d %H:%M:%S %Y", time), "] @message\n"; | ||
| 132 : | close LOG; | ||
| 133 : | } else { | ||
| 134 : | warn "failed to open $logFile for writing: $!"; | ||
| 135 : | } | ||
| 136 : | } | ||
| 137 : | sh002i | 558 | |
| 138 : | gage | 1387 | sub writeCourseLog($$@) { |
| 139 : | my ($ce, $facility, @message) = @_; | ||
| 140 : | unless ($ce->{courseFiles}->{logs}->{$facility}) { | ||
| 141 : | warn "There is no course log file for the $facility facility defined.\n"; | ||
| 142 : | return; | ||
| 143 : | } | ||
| 144 : | my $logFile = $ce->{courseFiles}->{logs}->{$facility}; | ||
| 145 : | local *LOG; | ||
| 146 : | if (open LOG, ">>", $logFile) { | ||
| 147 : | print LOG "[", time2str("%a %b %d %H:%M:%S %Y", time), "] @message\n"; | ||
| 148 : | close LOG; | ||
| 149 : | } else { | ||
| 150 : | warn "failed to open $logFile for writing: $!"; | ||
| 151 : | } | ||
| 152 : | } | ||
| 153 : | |||
| 154 : | |||
| 155 : | sh002i | 631 | # $ce - a WeBWork::CourseEnvironment object |
| 156 : | # $function - fully qualified function name | ||
| 157 : | # $details - any information, do not use the characters '[' or ']' | ||
| 158 : | sh002i | 692 | # $beginEnd - the string "begin", "intermediate", or "end" |
| 159 : | # use the intermediate step begun or completed for INTERMEDIATE | ||
| 160 : | sh002i | 631 | # use an empty string for $details when calling for END |
| 161 : | sh002i | 562 | sub writeTimingLogEntry($$$$) { |
| 162 : | my ($ce, $function, $details, $beginEnd) = @_; | ||
| 163 : | return unless defined $ce->{webworkFiles}->{logs}->{timing}; | ||
| 164 : | sh002i | 692 | $beginEnd = ($beginEnd eq "begin") ? ">" : ($beginEnd eq "end") ? "<" : "-"; |
| 165 : | sh002i | 562 | writeLog($ce, "timing", "$$ ".time." $beginEnd $function [$details]"); |
| 166 : | } | ||
| 167 : | |||
| 168 : | malsyned | 970 | sub list2hash { |
| 169 : | map {$_ => "0"} @_; | ||
| 170 : | } | ||
| 171 : | |||
| 172 : | sub max { | ||
| 173 : | my $soFar; | ||
| 174 : | foreach my $item (@_) { | ||
| 175 : | $soFar = $item unless defined $soFar; | ||
| 176 : | if ($item > $soFar) { | ||
| 177 : | $soFar = $item; | ||
| 178 : | } | ||
| 179 : | } | ||
| 180 : | malsyned | 979 | return defined $soFar ? $soFar : 0; |
| 181 : | malsyned | 970 | } |
| 182 : | |||
| 183 : | sh002i | 429 | sub decodeAnswers($) { |
| 184 : | my $string = shift; | ||
| 185 : | return unless defined $string and $string; | ||
| 186 : | my @array = split m/##/, $string; | ||
| 187 : | $array[$_] =~ s/\\#\\/#/g foreach 0 .. $#array; | ||
| 188 : | sh002i | 445 | push @array, "" if @array%2; |
| 189 : | sh002i | 429 | return @array; # it's actually a hash ;) |
| 190 : | } | ||
| 191 : | |||
| 192 : | sub encodeAnswers(\%\@) { | ||
| 193 : | my %hash = %{ shift() }; | ||
| 194 : | my @order = @{ shift() }; | ||
| 195 : | my $string; | ||
| 196 : | foreach my $name (@order) { | ||
| 197 : | my $value = defined $hash{$name} ? $hash{$name} : ""; | ||
| 198 : | $name =~ s/#/\\#\\/g; # this is a WEIRD way to escape things | ||
| 199 : | $value =~ s/#/\\#\\/g; # and it's not my fault! | ||
| 200 : | sh002i | 1095 | if ($value =~ m/\\$/) { |
| 201 : | # if the value ends with a backslash, string2hash will | ||
| 202 : | # interpret that as a normal escape sequence (not part | ||
| 203 : | # of the weird pound escape sequence) if the next | ||
| 204 : | # character is &. So we have to protect against this. | ||
| 205 : | # will adding a spcae at the end of the last answer | ||
| 206 : | # hurt anything? i don't think so... | ||
| 207 : | $value .= " "; | ||
| 208 : | } | ||
| 209 : | sh002i | 429 | $string .= "$name##$value##"; # this is also not my fault |
| 210 : | } | ||
| 211 : | $string =~ s/##$//; # remove last pair of hashs | ||
| 212 : | return $string; | ||
| 213 : | } | ||
| 214 : | |||
| 215 : | sh002i | 424 | sub ref2string($;$); |
| 216 : | sub ref2string($;$) { | ||
| 217 : | my $ref = shift; | ||
| 218 : | my $dontExpand = shift || {}; | ||
| 219 : | my $refType = ref $ref; | ||
| 220 : | sh002i | 422 | my $result; |
| 221 : | sh002i | 424 | if ($refType and not $dontExpand->{$refType}) { |
| 222 : | my $baseType = refBaseType($ref); | ||
| 223 : | $result .= '<font size="1" color="grey">' . $refType; | ||
| 224 : | sh002i | 425 | $result .= " ($baseType)" if $baseType and $refType ne $baseType; |
| 225 : | sh002i | 424 | $result .= ":</font><br>"; |
| 226 : | $result .= '<table border="1" cellpadding="2">'; | ||
| 227 : | if ($baseType eq "HASH") { | ||
| 228 : | my %hash = %$ref; | ||
| 229 : | foreach (sort keys %hash) { | ||
| 230 : | $result .= '<tr valign="top">'; | ||
| 231 : | $result .= "<td>$_</td>"; | ||
| 232 : | $result .= "<td>" . ref2string($hash{$_}, $dontExpand) . "</td>"; | ||
| 233 : | $result .= "</tr>"; | ||
| 234 : | } | ||
| 235 : | } elsif ($baseType eq "ARRAY") { | ||
| 236 : | my @array = @$ref; | ||
| 237 : | sh002i | 429 | # special case for Problem, Set, and User objects, which are defined |
| 238 : | # using lists and contain a @FIELDS package variable: | ||
| 239 : | no strict 'refs'; | ||
| 240 : | my @FIELDS = eval { @{$refType."::FIELDS"} }; | ||
| 241 : | use strict 'refs'; | ||
| 242 : | undef @FIELDS unless scalar @FIELDS == scalar @array and not $@; | ||
| 243 : | sh002i | 424 | foreach (0 .. $#array) { |
| 244 : | $result .= '<tr valign="top">'; | ||
| 245 : | $result .= "<td>$_</td>"; | ||
| 246 : | sh002i | 429 | $result .= "<td>".$FIELDS[$_]."</td>" if @FIELDS; |
| 247 : | sh002i | 424 | $result .= "<td>" . ref2string($array[$_], $dontExpand) . "</td>"; |
| 248 : | $result .= "</tr>"; | ||
| 249 : | } | ||
| 250 : | } elsif ($baseType eq "SCALAR") { | ||
| 251 : | my $scalar = $$ref; | ||
| 252 : | $result .= '<tr valign="top">'; | ||
| 253 : | $result .= "<td>$scalar</td>"; | ||
| 254 : | $result .= "</tr>"; | ||
| 255 : | sh002i | 422 | } else { |
| 256 : | sh002i | 424 | # perhaps a coderef? in any case, i don't feel like dealing with it! |
| 257 : | $result .= '<tr valign="top">'; | ||
| 258 : | $result .= "<td>$ref</td>"; | ||
| 259 : | $result .= "</tr>"; | ||
| 260 : | sh002i | 422 | } |
| 261 : | sh002i | 424 | $result .= "</table>" |
| 262 : | sh002i | 422 | } else { |
| 263 : | sh002i | 424 | $result .= defined $ref ? $ref : '<font color="red">undef</font>'; |
| 264 : | } | ||
| 265 : | sh002i | 422 | } |
| 266 : | |||
| 267 : | sh002i | 424 | sub refBaseType($) { |
| 268 : | my $ref = shift; | ||
| 269 : | sh002i | 984 | $ref =~ m/(\w+)\(/; # this might not be robust... |
| 270 : | return $1; | ||
| 271 : | sh002i | 422 | } |
| 272 : | |||
| 273 : | sh002i | 1111 | # p. 101, Camel, 3rd ed. |
| 274 : | # The <=> and cmp operators return -1 if the left operand is less than the | ||
| 275 : | # right operand, 0 if they are equal, and +1 if the left operand is greater | ||
| 276 : | # than the right operand. | ||
| 277 : | |||
| 278 : | sub sortByName { | ||
| 279 : | my ($field, @items) = @_; | ||
| 280 : | return sort { | ||
| 281 : | my @aParts = split m/(?<=\D)(?=\d)|(?<=\d)(?=\D)/, $a->$field; | ||
| 282 : | my @bParts = split m/(?<=\D)(?=\d)|(?<=\d)(?=\D)/, $b->$field; | ||
| 283 : | while (@aParts and @bParts) { | ||
| 284 : | my $aPart = shift @aParts; | ||
| 285 : | my $bPart = shift @bParts; | ||
| 286 : | my $aNumeric = $aPart =~ m/^\d*$/; | ||
| 287 : | my $bNumeric = $bPart =~ m/^\d*$/; | ||
| 288 : | |||
| 289 : | # numbers should come before words | ||
| 290 : | return -1 if $aNumeric and not $bNumeric; | ||
| 291 : | return +1 if not $aNumeric and $bNumeric; | ||
| 292 : | |||
| 293 : | # both have the same type | ||
| 294 : | if ($aNumeric and $bNumeric) { | ||
| 295 : | next if $aPart == $bPart; # check next pair | ||
| 296 : | return $aPart <=> $bPart; # compare numerically | ||
| 297 : | } else { | ||
| 298 : | next if $aPart eq $bPart; # check next pair | ||
| 299 : | return $aPart cmp $bPart; # compare lexicographically | ||
| 300 : | } | ||
| 301 : | } | ||
| 302 : | return +1 if @aParts; # a has more sections, should go second | ||
| 303 : | return -1 if @bParts; # a had fewer sections, should go first | ||
| 304 : | } @items; | ||
| 305 : | } | ||
| 306 : | |||
| 307 : | sh002i | 1145 | sub makeTempDirectory($$) { |
| 308 : | my ($parent, $basename) = @_; | ||
| 309 : | # Loop until we're able to create a directory, or it fails for some | ||
| 310 : | # reason other than there already being something there. | ||
| 311 : | my $triesRemaining = MKDIR_ATTEMPTS; | ||
| 312 : | my ($fullPath, $success); | ||
| 313 : | do { | ||
| 314 : | my $suffix = join "", map { ('A'..'Z','a'..'z','0'..'9')[int rand 62] } 1 .. 8; | ||
| 315 : | $fullPath = "$parent/$basename.$suffix"; | ||
| 316 : | $success = mkdir $fullPath; | ||
| 317 : | } until ($success or not $!{EEXIST}); | ||
| 318 : | die "Failed to create directory $fullPath: $!" | ||
| 319 : | unless $success; | ||
| 320 : | return $fullPath; | ||
| 321 : | } | ||
| 322 : | |||
| 323 : | sh002i | 1150 | sub removeTempDirectory($) { |
| 324 : | my ($dir) = @_; | ||
| 325 : | rmtree($dir, 0, 0); | ||
| 326 : | } | ||
| 327 : | |||
| 328 : | gage | 1137 | sub pretty_print_rh { |
| 329 : | my $rh = shift; | ||
| 330 : | foreach my $key (sort keys %{$rh}) { | ||
| 331 : | warn " $key => ",$rh->{$key},"\n"; | ||
| 332 : | } | ||
| 333 : | } | ||
| 334 : | sh002i | 1145 | |
| 335 : | malsyned | 1287 | sub cryptPassword { |
| 336 : | my ($clearPassword) = @_; | ||
| 337 : | my $salt = join("", ('.','/','0'..'9','A'..'Z','a'..'z')[rand 64, rand 64]); | ||
| 338 : | my $cryptPassword = crypt($clearPassword, $salt); | ||
| 339 : | return $cryptPassword; | ||
| 340 : | } | ||
| 341 : | |||
| 342 : | sh002i | 1900 | # from the Perl Cookbook, first edition, page 25: |
| 343 : | sub dequote($) { | ||
| 344 : | local $_ = shift; | ||
| 345 : | my ($white, $leader); # common whitespace and common leading string | ||
| 346 : | if (/^\s*(?:([^\w\s]+)(\s*).*\n)(?:\s*\1\2?.*\n)+$/) { | ||
| 347 : | ($white, $leader) = ($2, quotemeta($1)); | ||
| 348 : | } else { | ||
| 349 : | ($white, $leader) = (/^(\s+)/, ''); | ||
| 350 : | } | ||
| 351 : | s/^\s*?$leader(?:$white)?//gm; | ||
| 352 : | return $_; | ||
| 353 : | } | ||
| 354 : | |||
| 355 : | sh002i | 422 | 1; |
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