version 1.4, 2000/10/09 19:37:35
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version 1.15, 2001/05/03 15:54:06
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Line 10
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Line 10
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# 08/30,08/31,09/06,09/14,09/15,09/16,09/19,09/20,09/21,09/23, |
# 08/30,08/31,09/06,09/14,09/15,09/16,09/19,09/20,09/21,09/23, |
# 10/02 Gerd Kortemeyer) |
# 10/02 Gerd Kortemeyer) |
# |
# |
# 10/03,10/05,10/06,10/07,10/09 Gerd Kortemeyer |
# 10/03,10/05,10/06,10/07,10/09,10/10,10/11,10/16,10/17, |
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# 11/14,11/16, |
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# 10/01/01,05/01 Gerd Kortemeyer |
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package Apache::lonpageflip; |
package Apache::lonpageflip; |
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Line 29 sub addrid {
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Line 31 sub addrid {
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unless ($condid) { $condid=0; } |
unless ($condid) { $condid=0; } |
if (&Apache::lonnet::allowed('bre',$hash{'src_'.$new})) { |
if (&Apache::lonnet::allowed('bre',$hash{'src_'.$new})) { |
if ($current) { |
if ($current) { |
$current.=','.$new.':'.$condid; |
$current.=','.$new; |
} else { |
} else { |
$current=''.$new.':'.$condid; |
$current=''.$new; |
} |
} |
} |
} |
return $current; |
return $current; |
} |
} |
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sub move { |
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my ($rid,$mapurl,$direction)=@_; |
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my $next=''; |
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my $mincond=1; |
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my $posnext=''; |
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if ($direction eq 'forward') { |
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# --------------------------------------------------------------------- Forward |
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if ($hash{'type_'.$rid} eq 'finish') { |
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$rid=$hash{'ids_/res/'.$mapurl}; |
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} |
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map { |
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my $thiscond= |
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&Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}}); |
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if ($thiscond>=$mincond) { |
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if ($posnext) { |
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$posnext.=','.$_.':'.$thiscond; |
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} else { |
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$posnext=$_.':'.$thiscond; |
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} |
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if ($thiscond>$mincond) { $mincond=$thiscond; } |
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} |
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} split(/\,/,$hash{'to_'.$rid}); |
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map { |
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my ($linkid,$condval)=split(/\:/,$_); |
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if ($condval>=$mincond) { |
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$next=&addrid($next,$hash{'goesto_'.$linkid}, |
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$hash{'condid_'.$hash{'undercond_'.$linkid}}); |
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} |
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} split(/\,/,$posnext); |
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if ($hash{'is_map_'.$next}) { |
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if ( |
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$hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$next}}} eq 'sequence') { |
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$mapurl=$hash{'src_'.$next}; |
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$next=$hash{'map_start_'.$hash{'src_'.$next}}; |
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} |
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} |
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} elsif ($direction eq 'back') { |
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# ------------------------------------------------------------------- Backwards |
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if ($hash{'type_'.$rid} eq 'start') { |
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$rid=$hash{'ids_/res/'.$mapurl}; |
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} |
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map { |
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my $thiscond= |
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&Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}}); |
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if ($thiscond>=$mincond) { |
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if ($posnext) { |
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$posnext.=','.$_.':'.$thiscond; |
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} else { |
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$posnext=$_.':'.$thiscond; |
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} |
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if ($thiscond>$mincond) { $mincond=$thiscond; } |
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} |
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} split(/\,/,$hash{'from_'.$rid}); |
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map { |
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my ($linkid,$condval)=split(/\:/,$_); |
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if ($condval>=$mincond) { |
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$next=&addrid($next,$hash{'comesfrom_'.$linkid}, |
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$hash{'condid_'.$hash{'undercond_'.$linkid}}); |
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} |
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} split(/\,/,$posnext); |
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if ($hash{'is_map_'.$next}) { |
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if ( |
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$hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$next}}} eq 'sequence') { |
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$mapurl=$hash{'src_'.$next}; |
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$next=$hash{'map_finish_'.$hash{'src_'.$next}}; |
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} |
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} |
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} elsif ($direction eq 'up') { |
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# -------------------------------------------------------------------------- Up |
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} elsif ($direction eq 'down') { |
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# ------------------------------------------------------------------------ Down |
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} |
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return ($next,$mapurl); |
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} |
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# ================================================================ Main Handler |
# ================================================================ Main Handler |
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sub handler { |
sub handler { |
Line 50 sub handler {
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Line 130 sub handler {
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return OK; |
return OK; |
} |
} |
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my %cachehash=(); |
my %cachehash=(); |
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my $multichoice=0; |
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my %multichoicehash=(); |
my $redirecturl=''; |
my $redirecturl=''; |
my $next=''; |
my $next=''; |
my @possibilities=(); |
my @possibilities=(); |
Line 59 sub handler {
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Line 141 sub handler {
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$ENV{'form.postdata'}=~/(\w+)\:(.*)/; |
$ENV{'form.postdata'}=~/(\w+)\:(.*)/; |
my $direction=$1; |
my $direction=$1; |
my $currenturl=$2; |
my $currenturl=$2; |
my $redirecturl=$currenturl; |
if ($direction eq 'return') { |
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# -------------------------------------------------------- Return to last known |
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my $last; |
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if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db', |
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&GDBM_READER,0640)) { |
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$last=$hash{'last_known'}; |
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untie(%hash); |
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} |
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my $newloc; |
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if ($last) { |
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$newloc='/res/'.(split(/\_\_\_/,$last))[1]; |
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} else { |
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$newloc='/adm/noidea.html'; |
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} |
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$r->content_type('text/html'); |
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$r->header_out(Location => |
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'http://'.$ENV{'HTTP_HOST'}.$newloc); |
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return REDIRECT; |
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} |
$currenturl=~s/^http\:\/\///; |
$currenturl=~s/^http\:\/\///; |
$currenturl=~s/^[^\/]+//; |
$currenturl=~s/^[^\/]+//; |
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unless ($currenturl=~/\/res\//) { |
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my $last; |
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if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db', |
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&GDBM_READER,0640)) { |
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$last=$hash{'last_known'}; |
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untie(%hash); |
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} |
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if ($last) { |
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$currenturl='/res/'.(split(/\_\_\_/,$last))[1]; |
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} else { |
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$r->content_type('text/html'); |
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$r->header_out(Location => |
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'http://'.$ENV{'HTTP_HOST'}.'/adm/noidea.html'); |
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return REDIRECT; |
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} |
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} |
# ------------------------------------------- Do we have any idea where we are? |
# ------------------------------------------- Do we have any idea where we are? |
my $position; |
my $position; |
if ($position=Apache::lonnet::symbread($currenturl)) { |
if ($position=Apache::lonnet::symbread($currenturl)) { |
# ------------------------------------------------------------------------- Yes |
# ------------------------------------------------------------------------- Yes |
my ($mapurl,$mapnum,$thisurl)=split(/\_\_\_/,$position); |
my ($mapurl,$mapnum,$thisurl)=split(/\_\_\_/,$position); |
$cachehash{$thisurl}=$mapnum; |
$cachehash{$thisurl}=$mapnum; |
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# ============================================================ Tie the big hash |
if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'.db', |
if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'.db', |
&GDBM_READER,0640)) { |
&GDBM_READER,0640)) { |
my $rid=$hash{'map_pc_/res/'.$mapurl}.'.'.$mapnum; |
my $rid=$hash{'map_pc_/res/'.$mapurl}.'.'.$mapnum; |
my $next=''; |
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if ($direction eq 'forward') { |
# ------------------------------------------------- Move forward, backward, etc |
map { |
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$next=&addrid($next,$hash{'goesto_'.$_}, |
($next,$mapurl)=&move($rid,$mapurl,$direction); |
$hash{'condid_'.$hash{'undercond_'.$_}}); |
# -------------------------------------- Do we have one and only one empty URL? |
} split(/\,/,$hash{'to_'.$rid}); |
my $safecount=0; |
} elsif ($direction eq 'back') { |
while (($next) && ($next!~/\,/) && (!$hash{'src_'.$next}) |
map { |
&& ($safecount<25)) { |
$next=&addrid($next,$hash{'comesfrom_'.$_}, |
($next,$mapurl)=&move($next,$mapurl,$direction); |
$hash{'condid_'.$hash{'undercond_'.$_}}); |
$safecount++; |
} split(/\,/,$hash{'from_'.$rid}); |
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} elsif ($direction eq 'up') { |
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} elsif ($direction eq 'down') { |
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} |
} |
my $redirectid=''; |
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# ----------------------------------------------------- Check out possibilities |
# ----------------------------------------------------- Check out possibilities |
if ($next) { |
if ($next) { |
@possibilities=split(/\,/,$next); |
@possibilities=split(/\,/,$next); |
if ($#possibilities==0) { |
if ($#possibilities==0) { |
$redirectid=(split(/\:/,$next))[0]; |
# ---------------------------------------------- Only one possibility, redirect |
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$redirecturl=$hash{'src_'.$next}; |
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$cachehash{&Apache::lonnet::declutter($redirecturl)} |
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=(split(/\./,$next))[1]; |
} else { |
} else { |
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# ------------------------ There are multiple possibilities for a next resource |
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$multichoice=1; |
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map { |
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$multichoicehash{'src_'.$_}=$hash{'src_'.$_}; |
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$multichoicehash{'title_'.$_}=$hash{'title_'.$_}; |
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$multichoicehash{'type_'.$_}=$hash{'type_'.$_}; |
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$cachehash |
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{&Apache::lonnet::declutter( |
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$multichoicehash |
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{'src_'.$_} |
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)} |
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=(split(/\./,$_))[1]; |
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} @possibilities; |
} |
} |
} |
} else { |
if ($redirectid) { |
# -------------------------------------------------------------- No place to go |
$redirecturl=$hash{'src_'.$redirectid}; |
$multichoice=-1; |
} |
} |
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# ----------------- The program must come past this point to untie the big hash |
untie(%hash); |
untie(%hash); |
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# --------------------------------------------------------- Store position info |
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$cachehash{'last_direction'}=$direction; |
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$cachehash{'last_known'}=&Apache::lonnet::declutter($currenturl); |
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&Apache::lonnet::symblist($mapurl,%cachehash); |
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# ============================================== Do not return before this line |
if ($redirecturl) { |
if ($redirecturl) { |
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# ----------------------------------------------------- There is a URL to go to |
$r->content_type('text/html'); |
$r->content_type('text/html'); |
$r->header_out(Location => |
$r->header_out(Location => |
'http://'.$ENV{'HTTP_HOST'}.$redirecturl); |
'http://'.$ENV{'HTTP_HOST'}.$redirecturl); |
return REDIRECT; |
return REDIRECT; |
} |
} else { |
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# --------------------------------------------------------- There was a problem |
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$r->content_type('text/html'); |
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$r->send_http_header; |
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if ($#possibilities>0) { |
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$r->print(<<ENDSTART); |
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<head><title>Choose Next Location</title></head> |
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<body bgcolor="#FFFFFF"> |
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<h1>LON-CAPA</h1> |
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There are several possibilities of where to go next. |
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<p> |
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Please click on the the resource you intend to access: |
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<p> |
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<table border=2> |
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<tr><th>Title</th><th>Type</th></tr> |
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ENDSTART |
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map { |
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$r->print( |
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'<tr><td><a href="'. |
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$multichoicehash{'src_'.$_}.'">'. |
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$multichoicehash{'title_'.$_}. |
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'</a></td><td>'.$multichoicehash{'type_'.$_}. |
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'</td></tr>'); |
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} @possibilities; |
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$r->print('</table></body></html>'); |
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return OK; |
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} else { |
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$r->print(<<ENDNONE); |
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<head><title>Choose Next Location</title></head> |
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<body bgcolor="#FFFFFF"> |
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<img src="/adm/lonKaputt/lonlogo_broken.gif" align=left> |
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<h1>Sorry!</h1> |
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<h2>Next resource could not be identified.</h2> |
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</body> |
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</html> |
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ENDNONE |
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return OK; |
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} |
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} |
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} else { |
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# ------------------------------------------------- Problem, could not tie hash |
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$ENV{'user.error.msg'}="/adm/flip:bre:0:1:Course Data Missing"; |
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return HTTP_NOT_ACCEPTABLE; |
} |
} |
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} else { |
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# ---------------------------------------- No, could not determine where we are |
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$r->internal_redirect('/adm/ambiguous'); |
} |
} |
# -------------------------------------------------------- No, could not decide |
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} |
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$r->content_type('text/html'); |
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$r->send_http_header; |
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$r->print('<html><body>'); |
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# -------------------------- Class was not initialized or page fliped strangely |
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} else { |
} else { |
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# -------------------------- Class was not initialized or page fliped strangely |
$ENV{'user.error.msg'}="/adm/flip:bre:0:0:Choose Course"; |
$ENV{'user.error.msg'}="/adm/flip:bre:0:0:Choose Course"; |
return HTTP_NOT_ACCEPTABLE; |
return HTTP_NOT_ACCEPTABLE; |
} |
} |
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# ------TRASH BELOW |
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# --------------------------- TRASH |
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$r->print('</body></html>'); |
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return OK; |
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# ========================================================= TOTAL TRASH |
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# &Apache::lonnet::symblist($requrl,%symbhash); |
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} |
} |
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1; |
1; |