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| 1 : | malsyned | 283 | package WeBWorK::CourseEnvironment; |
| 2 : | |||
| 3 : | sh002i | 319 | use strict; |
| 4 : | use warnings; | ||
| 5 : | malsyned | 283 | use Safe; |
| 6 : | |||
| 7 : | sh002i | 319 | # new($invocant, $webworkRoot, $courseName) |
| 8 : | # $invocant implicitly set by caller | ||
| 9 : | # $webworkRoot directory that contains the WeBWorK distribution | ||
| 10 : | # $courseName name of the course being used | ||
| 11 : | malsyned | 283 | sub new { |
| 12 : | sh002i | 319 | my $invocant = shift; |
| 13 : | my $class = ref($invocant) || $invocant; | ||
| 14 : | malsyned | 283 | my $webworkRoot = shift; |
| 15 : | my $courseName = shift; | ||
| 16 : | sh002i | 319 | my $safe = Safe->new; |
| 17 : | malsyned | 283 | |
| 18 : | sh002i | 319 | # set up some defaults that the environment files will need |
| 19 : | $safe->reval("\$webworkRoot = '$webworkRoot'"); | ||
| 20 : | $safe->reval("\$courseName = '$courseName'"); | ||
| 21 : | |||
| 22 : | malsyned | 283 | # determine location of globalEnvironmentFile |
| 23 : | my $globalEnvironmentFile = "$webworkRoot/conf/global.conf"; | ||
| 24 : | sh002i | 319 | |
| 25 : | malsyned | 283 | # read and evaluate the global environment file |
| 26 : | my $globalFileContents = readFile($globalEnvironmentFile); | ||
| 27 : | sh002i | 319 | $safe->reval($globalFileContents); |
| 28 : | |||
| 29 : | # if that evaluation failed, we can't really go on... | ||
| 30 : | # we need a global environment! | ||
| 31 : | malsyned | 283 | $@ and die "Could not evaluate global environment file $globalEnvironmentFile: $@"; |
| 32 : | |||
| 33 : | # determine location of courseEnvironmentFile | ||
| 34 : | sh002i | 319 | # pull it out of $safe's symbol table ad hoc |
| 35 : | # (we don't want to do the hash conversion yet) | ||
| 36 : | no strict 'refs'; | ||
| 37 : | my $courseEnvironmentFile = ${*{${$safe->root."::"}{courseFiles}}}{environment}; | ||
| 38 : | use strict 'refs'; | ||
| 39 : | |||
| 40 : | malsyned | 283 | # read and evaluate the course environment file |
| 41 : | sh002i | 319 | # if readFile failed, we don't bother trying to reval |
| 42 : | my $courseFileContents = eval { readFile($courseEnvironmentFile) }; # catch exceptions | ||
| 43 : | $@ or $safe->reval($courseFileContents); | ||
| 44 : | malsyned | 304 | |
| 45 : | sh002i | 319 | # get the safe compartment's namespace as a hash |
| 46 : | no strict 'refs'; | ||
| 47 : | my %symbolHash = %{$safe->root."::"}; | ||
| 48 : | use strict 'refs'; | ||
| 49 : | |||
| 50 : | # convert the symbol hash into a hash of regular variables. | ||
| 51 : | my $self = {}; | ||
| 52 : | foreach my $name (keys %symbolHash) { | ||
| 53 : | # weed out internal symbols | ||
| 54 : | next if $name =~ /^(INC|_|__ANON__|main::)$/; | ||
| 55 : | # pull scalar, array, and hash values for this symbol | ||
| 56 : | my $scalar = ${*{$symbolHash{$name}}}; | ||
| 57 : | my @array = @{*{$symbolHash{$name}}}; | ||
| 58 : | my %hash = %{*{$symbolHash{$name}}}; | ||
| 59 : | # for multiple variables sharing a symbol, scalar takes precedence | ||
| 60 : | # over array, which takes precedence over hash. | ||
| 61 : | if (defined $scalar) { | ||
| 62 : | $self->{$name} = $scalar; | ||
| 63 : | } elsif (@array) { | ||
| 64 : | $self->{$name} = \@array; | ||
| 65 : | } elsif (%hash) { | ||
| 66 : | $self->{$name} = \%hash; | ||
| 67 : | } | ||
| 68 : | } | ||
| 69 : | |||
| 70 : | malsyned | 283 | bless $self, $class; |
| 71 : | return $self; | ||
| 72 : | } | ||
| 73 : | |||
| 74 : | # ----- utils ----- | ||
| 75 : | |||
| 76 : | sub readFile { | ||
| 77 : | my $fileName = shift; | ||
| 78 : | sh002i | 319 | open INPUTFILE, "<", $fileName |
| 79 : | or die "Couldn't open environment file $fileName: $!"; | ||
| 80 : | malsyned | 283 | my $result = join "\n", <INPUTFILE>; |
| 81 : | close INPUTFILE; | ||
| 82 : | return $result; | ||
| 83 : | } | ||
| 84 : | |||
| 85 : | 1; |
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