--- loncom/interface/loncommon.pm	2012/07/07 21:58:14	1.1086
+++ loncom/interface/loncommon.pm	2012/12/04 18:50:33	1.1100
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # a pile of common routines
 #
-# $Id: loncommon.pm,v 1.1086 2012/07/07 21:58:14 raeburn Exp $
+# $Id: loncommon.pm,v 1.1100 2012/12/04 18:50:33 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -70,6 +70,9 @@ use Apache::lonclonecourse();
 use LONCAPA qw(:DEFAULT :match);
 use DateTime::TimeZone;
 use DateTime::Locale::Catalog;
+use Text::Aspell;
+use Authen::Captcha;
+use Captcha::reCAPTCHA;
 
 # ---------------------------------------------- Designs
 use vars qw(%defaultdesign);
@@ -154,6 +157,7 @@ sub ssi_with_retries {
 # ----------------------------------------------- Filetypes/Languages/Copyright
 my %language;
 my %supported_language;
+my %supported_codes;
 my %latex_language;		# For choosing hyphenation in <transl..>
 my %latex_language_bykey;	# for choosing hyphenation from metadata
 my %cprtag;
@@ -188,14 +192,15 @@ BEGIN {
             while (my $line = <$fh>) {
                 next if ($line=~/^\#/);
                 chomp($line);
-                my ($key,$two,$country,$three,$enc,$val,$sup,$latex)=(split(/\t/,$line));
+                my ($key,$code,$country,$three,$enc,$val,$sup,$latex)=(split(/\t/,$line));
                 $language{$key}=$val.' - '.$enc;
                 if ($sup) {
                     $supported_language{$key}=$sup;
+		    $supported_codes{$key}   = $code;
                 }
 		if ($latex) {
 		    $latex_language_bykey{$key} = $latex;
-		    $latex_language{$two} = $latex;
+		    $latex_language{$code} = $latex;
 		}
             }
             close($fh);
@@ -657,7 +662,7 @@ if (!Array.prototype.indexOf) {
         var n = 0;
         if (arguments.length > 0) {
             n = Number(arguments[1]);
-            if (n !== n) { // shortcut for verifying if it's NaN
+            if (n !== n) { // shortcut for verifying if it is NaN
                 n = 0;
             } else if (n !== 0 && n !== (1 / 0) && n !== -(1 / 0)) {
                 n = (n > 0 || -1) * Math.floor(Math.abs(n));
@@ -885,10 +890,14 @@ sub check_uncheck_jscript {
 function checkAll(field) {
     if (field.length > 0) {
         for (i = 0; i < field.length; i++) {
-            field[i].checked = true ;
+            if (!field[i].disabled) { 
+                field[i].checked = true;
+            }
         }
     } else {
-        field.checked = true
+        if (!field.disabled) { 
+            field.checked = true;
+        }
     }
 }
  
@@ -995,6 +1004,33 @@ sub select_language {
 
 =pod
 
+
+=item * &list_languages()
+
+Returns an array reference that is suitable for use in language prompters.
+Each array element is itself a two element array.  The first element
+is the language code.  The second element a descsriptiuon of the 
+language itself.  This is suitable for use in e.g.
+&Apache::edit::select_arg (once dereferenced that is).
+
+=cut 
+
+sub list_languages {
+    my @lang_choices;
+
+    foreach my $id (&languageids()) {
+	my $code = &supportedlanguagecode($id);
+	if ($code) {
+	    my $selector    = $supported_codes{$id};
+	    my $description = &plainlanguagedescription($id);
+	    push (@lang_choices, [$selector, $description]);
+	}
+    }
+    return \@lang_choices;
+}
+
+=pod
+
 =item * &linked_select_forms(...)
 
 linked_select_forms returns a string containing a <script></script> block
@@ -2986,6 +3022,45 @@ sub get_related_words {
     untie %thesaurus_db;
     return @Words;
 }
+###############################################################
+#
+#  Spell checking
+#
+
+=pod
+
+=head1 Spell checking
+
+=over 4
+
+=item * &check_spelling($wordlist $language)
+
+Takes a string containing words and feeds it to an external
+spellcheck program via a pipeline. Returns a string containing
+them mis-spelled words.
+
+Parameters:
+
+=over 4
+
+=item - $wordlist
+
+String that will be fed into the spellcheck program.
+
+=item - $language
+
+Language string that specifies the language for which the spell
+check will be performed.
+
+=back
+
+=back
+
+Note: This sub assumes that aspell is installed.
+
+
+=cut
+
 
 =pod
 
@@ -2993,6 +3068,31 @@ sub get_related_words {
 
 =cut
 
+sub check_spelling {
+    my ($wordlist, $language) = @_;
+    my @misspellings;
+    
+    # Generate the speller and set the langauge.
+    # if explicitly selected:
+
+    my $speller = Text::Aspell->new;
+    if ($language) {
+	$speller->set_option('lang', $language);
+    }
+
+    # Turn the word list into an array of words by splittingon whitespace
+
+    my @words = split(/\s+/, $wordlist);
+
+    foreach my $word (@words) {
+	if(! $speller->check($word)) {
+	    push(@misspellings, $word);
+	}
+    }
+    return join(' ', @misspellings);
+    
+}
+
 # -------------------------------------------------------------- Plaintext name
 =pod
 
@@ -3226,7 +3326,7 @@ sub aboutmewrapper {
     if (!defined($username)  && !defined($domain)) {
         return;
     }
-    return '<a href="/adm/'.$domain.'/'.$username.'/aboutme?forcestudent=1"'.
+    return '<a href="/adm/'.$domain.'/'.$username.'/aboutme"'.
 	($target?' target="'.$target.'"':'').($class?' class="'.$class.'"':'').' title="'.&mt("View this user's personal information page").'">'.$link.'</a>';
 }
 
@@ -4960,6 +5060,10 @@ Inputs:
                               should it have jsmath forced on by the
                               current page
 
+=item * $advtoolsref, optional argument, ref to an array containing
+            inlineremote items to be added in "Functions" menu below
+            breadcrumbs.
+
 =back
 
 Returns: A uniform header for LON-CAPA web pages.  
@@ -4971,7 +5075,7 @@ other decorations will be returned.
 
 sub bodytag {
     my ($title,$function,$addentries,$bodyonly,$domain,$forcereg,
-        $no_nav_bar,$bgcolor,$args)=@_;
+        $no_nav_bar,$bgcolor,$args,$advtoolsref)=@_;
 
     my $public;
     if ((($env{'user.name'} eq 'public') && ($env{'user.domain'} eq 'public'))
@@ -5090,8 +5194,15 @@ sub bodytag {
             if ($env{'request.state'} eq 'construct') {
                 $bodytag .= &Apache::lonmenu::innerregister($forcereg,
                                 $args->{'bread_crumbs'});
-            } elsif ($forcereg) { 
-                $bodytag .= &Apache::lonmenu::innerregister($forcereg);
+            } elsif ($forcereg) {
+                $bodytag .= &Apache::lonmenu::innerregister($forcereg,undef,
+                                                            $args->{'group'});
+            } else {
+                $bodytag .= 
+                    &Apache::lonmenu::prepare_functions($env{'request.noversionuri'},
+                                                        $forcereg,$args->{'group'},
+                                                        $args->{'bread_crumbs'},
+                                                        $advtoolsref);
             }
         }else{
             # this is to seperate menu from content when there's no secondary
@@ -5306,10 +5417,12 @@ form, .inline {
 
 .LC_error {
   color: red;
-  font-size: larger;
 }
 
-.LC_warning,
+.LC_warning {
+  color: darkorange;
+}
+
 .LC_diff_removed {
   color: red;
 }
@@ -5472,11 +5585,11 @@ td.LC_table_cell_checkbox {
   text-align: left;
 }
 
-.LC_head_subbox {
+.LC_head_subbox, .LC_actionbox {
   clear:both;
   background: #F8F8F8; /* $sidebg; */
   border: 1px solid $sidebg;
-  margin: 0 0 10px 0;      
+  margin: 0 0 10px 0;
   padding: 3px;
   text-align: left;
 }
@@ -6171,7 +6284,6 @@ div.LC_docs_entry_move {
 
 table.LC_data_table tr > td.LC_docs_entry_commands,
 table.LC_data_table tr > td.LC_docs_entry_parameter {
-  background: #DDDDDD;
   font-size: x-small;
 }
 
@@ -7007,6 +7119,27 @@ ul.LC_funclist li {
 		cursor:pointer;
 }
 
+/*
+  styles used by TTH when "Default set of options to pass to tth/m
+  when converting TeX" in course settings has been set
+
+  option passed: -t
+
+*/
+
+td div.comp { margin-top: -0.6ex; margin-bottom: -1ex;}
+td div.comb { margin-top: -0.6ex; margin-bottom: -.6ex;}
+td div.hrcomp { line-height: 0.9; margin-top: -0.8ex; margin-bottom: -1ex;}
+td div.norm {line-height:normal;}
+
+/*
+  option passed -y3
+*/
+
+span.roman {font-family: serif; font-style: normal; font-weight: normal;}
+span.overacc2 {position: relative;  left: .8em; top: -1.2ex;}
+span.overacc1 {position: relative;  left: .6em; top: -1.2ex;}
+
 END
 }
 
@@ -7276,6 +7409,8 @@ $args - additional optional args support
                                     current page
              bread_crumbs ->             Array containing breadcrumbs
              bread_crumbs_component ->  if exists show it as headline else show only the breadcrumbs
+             group          -> includes the current group, if page is for a 
+                               specific group  
 
 =back
 
@@ -7288,7 +7423,7 @@ sub start_page {
     #&Apache::lonnet::logthis("start_page ".join(':',caller(0)));
 
     $env{'internal.start_page'}++;
-    my $result;
+    my ($result,@advtools);
 
     if (! exists($args->{'skip_phases'}{'head'}) ) {
         $result .= &xml_begin() . &headtag($title, $head_extra, $args);
@@ -7305,7 +7440,8 @@ sub start_page {
                          $args->{'function'},       $args->{'add_entries'},
                          $args->{'only_body'},      $args->{'domain'},
                          $args->{'force_register'}, $args->{'no_nav_bar'},
-                         $args->{'bgcolor'},        $args);
+                         $args->{'bgcolor'},        $args,
+                         \@advtools);
         }
     }
 
@@ -7334,6 +7470,10 @@ sub start_page {
 				&Apache::lonhtmlcommon::add_breadcrumb($crumb);
 			}
 		}
+                # if @advtools array contains items add then to the breadcrumbs
+                if (@advtools > 0) {
+                    &Apache::lonmenu::advtools_crumbs(@advtools);
+                }
 
 		#if bread_crumbs_component exists show it as headline else show only the breadcrumbs
 		if(exists($args->{'bread_crumbs_component'})){
@@ -7729,7 +7869,7 @@ sub simple_error_page {
     my ($r,$title,$msg) = @_;
     my $page =
 	&Apache::loncommon::start_page($title).
-	&mt($msg).
+	'<p class="LC_error">'.&mt($msg).'</p>'.
 	&Apache::loncommon::end_page();
     if (ref($r)) {
 	$r->print($page);
@@ -11179,11 +11319,11 @@ sub process_extracted_files {
     if ($env{'form.folderpath'}) {
         my @items = split('&',$env{'form.folderpath'});
         $folders{'0'} = $items[-2];
-        $containers{'0'}='sequence';
-    } elsif ($env{'form.pagepath'}) {
-        my @items = split('&',$env{'form.pagepath'});
-        $folders{'0'} = $items[-2];
-        $containers{'0'}='page';
+        if ($env{'form.folderpath'} =~ /\:1$/) {
+            $containers{'0'}='page';
+        } else {  
+            $containers{'0'}='sequence';
+        }
     }
     my @archdirs = &get_env_multiple('form.archive_directory');
     if ($numitems) {
@@ -11258,7 +11398,7 @@ sub process_extracted_files {
                             my ($outtext,$errtext) =
                                 &LONCAPA::map::storemap('/uploaded/'.$docudom.'/'.
                                                         $docuname.'/'.$folders{$outer}.
-                                                        '.'.$containers{$outer},1);
+                                                        '.'.$containers{$outer},1,1);
                             $newseqid{$i} = $newidx;
                             unless ($errtext) {
                                 $result .=  '<li>'.&mt('Folder: [_1] added to course',$docstitle).'</li>'."\n";
@@ -11291,7 +11431,7 @@ sub process_extracted_files {
                             my ($outtext,$errtext)=
                                 &LONCAPA::map::storemap('/uploaded/'.$docudom.'/'.
                                                         $docuname.'/'.$folders{$outer}.
-                                                        '.'.$containers{$outer},1);
+                                                        '.'.$containers{$outer},1,1);
                             unless ($errtext) {
                                 if (-e "$prefix$dir/$docstype/$mapinner{$outer}/$newidx/$title") {
                                     $result .= '<li>'.&mt('File: [_1] added to course',$docstitle).'</li>'."\n";
@@ -13778,6 +13918,20 @@ sub init_user_environment {
                                                   \%userenv,\%domdef,\%is_adv);
         }
 
+        $userenv{'canrequest.author'} =
+            &Apache::lonnet::usertools_access($username,$domain,'requestauthor',
+                                        'reload','requestauthor',
+                                        \%userenv,\%domdef,\%is_adv);
+        my %reqauthor = &Apache::lonnet::get('requestauthor',['author_status','author'],
+                                             $domain,$username);
+        my $reqstatus = $reqauthor{'author_status'};
+        if ($reqstatus eq 'approval' || $reqstatus eq 'approved') { 
+            if (ref($reqauthor{'author'}) eq 'HASH') {
+                $userenv{'requestauthorqueued'} = $reqstatus.':'.
+                                                  $reqauthor{'author'}{'timestamp'};
+            }
+        }
+
 	$env{'user.environment'} = "$lonids/$cookie.id";
 
 	if (tie(my %disk_env,'GDBM_File',"$lonids/$cookie.id",
@@ -13952,6 +14106,164 @@ sub parse_supplemental_title {
     return $title;
 }
 
+sub captcha_display {
+    my ($context,$lonhost) = @_;
+    my ($output,$error);
+    my ($captcha,$pubkey,$privkey) = &get_captcha_config($context,$lonhost);
+    if ($captcha eq 'original') {
+        $output = &create_captcha();
+        unless ($output) {
+            $error = 'captcha'; 
+        }
+    } elsif ($captcha eq 'recaptcha') {
+        $output = &create_recaptcha($pubkey);
+        unless ($output) {
+            $error = 'recaptcha'; 
+        }
+    }
+    return ($output,$error);
+}
+
+sub captcha_response {
+    my ($context,$lonhost) = @_;
+    my ($captcha_chk,$captcha_error);
+    my ($captcha,$pubkey,$privkey) = &get_captcha_config($context,$lonhost);
+    if ($captcha eq 'original') {
+        ($captcha_chk,$captcha_error) = &check_captcha();
+    } elsif ($captcha eq 'recaptcha') {
+        $captcha_chk = &check_recaptcha($privkey);
+    } else {
+        $captcha_chk = 1;
+    }
+    return ($captcha_chk,$captcha_error);
+}
+
+sub get_captcha_config {
+    my ($context,$lonhost) = @_;
+    my ($captcha,$pubkey,$privkey,$hashtocheck);
+    my $hostname = &Apache::lonnet::hostname($lonhost);
+    my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
+    my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
+    if ($context eq 'usercreation') {
+        my %domconfig = &Apache::lonnet::get_dom('configuration',[$context],$serverhomedom);
+        if (ref($domconfig{$context}) eq 'HASH') {
+            $hashtocheck = $domconfig{$context}{'cancreate'};
+            if (ref($hashtocheck) eq 'HASH') {
+                if ($hashtocheck->{'captcha'} eq 'recaptcha') {
+                    if (ref($hashtocheck->{'recaptchakeys'}) eq 'HASH') {
+                        $pubkey = $hashtocheck->{'recaptchakeys'}{'public'};
+                        $privkey = $hashtocheck->{'recaptchakeys'}{'private'};
+                    }
+                    if ($privkey && $pubkey) {
+                        $captcha = 'recaptcha';
+                    } else {
+                        $captcha = 'original';
+                    }
+                } elsif ($hashtocheck->{'captcha'} ne 'notused') {
+                    $captcha = 'original';
+                }
+            }
+        } else {
+            $captcha = 'captcha';
+        }
+    } elsif ($context eq 'login') {
+        my %domconfhash = &Apache::loncommon::get_domainconf($serverhomedom);
+        if ($domconfhash{$serverhomedom.'.login.captcha'} eq 'recaptcha') {
+            $pubkey = $domconfhash{$serverhomedom.'.login.recaptchakeys_public'};
+            $privkey = $domconfhash{$serverhomedom.'.login.recaptchakeys_private'};
+            if ($privkey && $pubkey) {
+                $captcha = 'recaptcha';
+            } else {
+                $captcha = 'original';
+            }
+        } elsif ($domconfhash{$serverhomedom.'.login.captcha'} eq 'original') {
+            $captcha = 'original';
+        }
+    }
+    return ($captcha,$pubkey,$privkey);
+}
+
+sub create_captcha {
+    my %captcha_params = &captcha_settings();
+    my ($output,$maxtries,$tries) = ('',10,0);
+    while ($tries < $maxtries) {
+        $tries ++;
+        my $captcha = Authen::Captcha->new (
+                                           output_folder => $captcha_params{'output_dir'},
+                                           data_folder   => $captcha_params{'db_dir'},
+                                          );
+        my $md5sum = $captcha->generate_code($captcha_params{'numchars'});
+
+        if (-e $Apache::lonnet::perlvar{'lonCaptchaDir'}.'/'.$md5sum.'.png') {
+            $output = '<input type="hidden" name="crypt" value="'.$md5sum.'" />'."\n".
+                      &mt('Type in the letters/numbers shown below').'&nbsp;'.
+                     '<input type="text" size="5" name="code" value="" /><br />'.
+                     '<img src="'.$captcha_params{'www_output_dir'}.'/'.$md5sum.'.png" />';
+            last;
+        }
+    }
+    return $output;
+}
+
+sub captcha_settings {
+    my %captcha_params = (
+                           output_dir     => $Apache::lonnet::perlvar{'lonCaptchaDir'},
+                           www_output_dir => "/captchaspool",
+                           db_dir         => $Apache::lonnet::perlvar{'lonCaptchaDb'},
+                           numchars       => '5',
+                         );
+    return %captcha_params;
+}
+
+sub check_captcha {
+    my ($captcha_chk,$captcha_error);
+    my $code = $env{'form.code'};
+    my $md5sum = $env{'form.crypt'};
+    my %captcha_params = &captcha_settings();
+    my $captcha = Authen::Captcha->new(
+                      output_folder => $captcha_params{'output_dir'},
+                      data_folder   => $captcha_params{'db_dir'},
+                  );
+    my $captcha_chk = $captcha->check_code($code,$md5sum);
+    my %captcha_hash = (
+                        0       => 'Code not checked (file error)',
+                       -1      => 'Failed: code expired',
+                       -2      => 'Failed: invalid code (not in database)',
+                       -3      => 'Failed: invalid code (code does not match crypt)',
+    );
+    if ($captcha_chk != 1) {
+        $captcha_error = $captcha_hash{$captcha_chk}
+    }
+    return ($captcha_chk,$captcha_error);
+}
+
+sub create_recaptcha {
+    my ($pubkey) = @_;
+    my $captcha = Captcha::reCAPTCHA->new;
+    return $captcha->get_options_setter({theme => 'white'})."\n".
+           $captcha->get_html($pubkey).
+           &mt('If either word is hard to read, [_1] will replace them.',
+               '<image src="/res/adm/pages/refresh.gif" alt="reCAPTCHA refresh" />').
+           '<br /><br />';
+}
+
+sub check_recaptcha {
+    my ($privkey) = @_;
+    my $captcha_chk;
+    my $captcha = Captcha::reCAPTCHA->new;
+    my $captcha_result =
+        $captcha->check_answer(
+                                $privkey,
+                                $ENV{'REMOTE_ADDR'},
+                                $env{'form.recaptcha_challenge_field'},
+                                $env{'form.recaptcha_response_field'},
+                              );
+    if ($captcha_result->{is_valid}) {
+        $captcha_chk = 1;
+    }
+    return $captcha_chk;
+}
+
 =pod
 
 =back