rat/lonsequence.pm - view

File: [LON-CAPA] / rat / lonsequence.pm
Revision 1.20: download - view: text, annotated - select for diffs
Fri Sep 10 06:38:24 2004 UTC (19 years, 7 months ago) by www
Branches: MAIN
CVS tags: HEAD

Quickly saving my work on folders in COM, Trash.
Also fixed bodytag "emfo" - BTW, bodytag does its own &mt-call.

1: # The LearningOnline Network with CAPA 2: # 3: # Sequence Handler 4: # 5: # $Id: lonsequence.pm,v 1.20 2004/09/10 06:38:24 www Exp $ 6: # 7: # Copyright Michigan State University Board of Trustees 8: # 9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA). 10: # 11: # LON-CAPA is free software; you can redistribute it and/or modify 12: # it under the terms of the GNU General Public License as published by 13: # the Free Software Foundation; either version 2 of the License, or 14: # (at your option) any later version. 15: # 16: # LON-CAPA is distributed in the hope that it will be useful, 17: # but WITHOUT ANY WARRANTY; without even the implied warranty of 18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19: # GNU General Public License for more details. 20: # 21: # You should have received a copy of the GNU General Public License 22: # along with LON-CAPA; if not, write to the Free Software 23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 24: # 25: # /home/httpd/html/adm/gpl.txt 26: # 27: # http://www.lon-capa.org/ 28: # 29: # (Handler to resolve ambiguous file locations 30: # 31: # (TeX Content Handler 32: # 33: # 05/29/00,05/30,10/11 Gerd Kortemeyer) 34: # 35: # 10/11,10/12 Gerd Kortemeyer) 36: # 37: # 10/16 Gerd Kortemeyer 38: 39: package Apache::lonsequence; 40: 41: use strict; 42: use Apache::lonnet; 43: use Apache::Constants qw(:common :http REDIRECT); 44: use GDBM_File; 45: use Apache::lonratedt; 46: use Apache::lonratsrv; 47: use Apache::lonpageflip; 48: use Apache::loncommon; 49: use Apache::lonlocal; 50: 51: my %selhash; 52: my $successtied; 53: 54: # ----------------------------------------- Attempt to read from resource space 55: 56: sub attemptread { 57: my $fn=shift; 58: &Apache::lonnet::repcopy($fn); 59: if (-e $fn) { 60: return &Apache::lonratedt::attemptread($fn); 61: } else { 62: return (); 63: } 64: } 65: 66: sub mapread { 67: my $fn=shift; 68: &Apache::lonnet::repcopy($fn); 69: if (-e $fn) { 70: return &Apache::lonratedt::mapread($fn,''); 71: } else { 72: return (); 73: } 74: } 75: 76: # ---------------------------------------------------------------- View Handler 77: 78: sub viewmap { 79: my ($r,$url)=@_; 80: $r->print('<html>'); 81: if ($ENV{'form.forceselect'}) { $r->print(<<ENDSCRIPT); 82: <script> 83: 84: function select_group() { 85: window.location="/adm/groupsort?catalogmode=groupsec&mode=rat&acts="+document.forms.fileattr.acts.value; 86: } 87: 88: function queue(val) { 89: if (eval("document.forms."+val+".filelink.checked")) { 90: var l=val.length; 91: var v=val.substring(4,l); 92: document.forms.fileattr.acts.value+='1a'+v+'b'; 93: } 94: else { 95: var l=val.length; 96: var v=val.substring(4,l); 97: document.forms.fileattr.acts.value+='0a'+v+'b'; 98: } 99: } 100: 101: </script> 102: ENDSCRIPT 103: } 104: $r->print(&Apache::loncommon::bodytag('Map Contents').'<h1>'.$url.'</h1>'); 105: # ------------------ This is trying to select. Provide buttons and tie %selhash 106: if ($ENV{'form.forceselect'}) { $r->print(<<ENDSELECT); 107: <form name=fileattr><input type=hidden name=acts value=''> 108: <input type="button" name="close" value='CLOSE' onClick="self.close()"> 109: <input type="button" name="groupimport" value='GROUP IMPORT' 110: onClick="javascript:select_group()"> 111: </form> 112: ENDSELECT 113: my $diropendb = 114: "/home/httpd/perl/tmp/$ENV{'user.domain'}\_$ENV{'user.name'}_groupsec.db"; 115: if (tie(%selhash,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) { 116: if ($ENV{'form.launch'} eq '1') { 117: &start_fresh_session(); 118: } 119: $successtied=1; 120: 121: # - Evaluate actions from previous page (both cumulatively and chronologically) 122: if ($ENV{'form.catalogmode'} eq 'groupimport') { 123: my $acts=$ENV{'form.acts'}; 124: my @Acts=split(/b/,$acts); 125: my %ahash; 126: my %achash; 127: my $ac=0; 128: # some initial hashes for working with data 129: foreach (@Acts) { 130: my ($state,$ref)=split(/a/); 131: $ahash{$ref}=$state; 132: $achash{$ref}=$ac; 133: $ac++; 134: } 135: # sorting through the actions and changing the tied database hash 136: foreach (sort {$achash{$a}<=>$achash{$b}} (keys %ahash)) { 137: my $key=$_; 138: if ($ahash{$key} eq '1') { 139: $selhash{'store_'.$selhash{'pre_'.$key.'_link'}}= 140: $selhash{'pre_'.$key.'_title'}; 141: $selhash{'storectr_'.$selhash{'pre_'.$key.'_link'}}= 142: $selhash{'storectr'}+0; 143: $selhash{'storectr'}++; 144: } 145: if ($ahash{$key} eq '0') { 146: if ($selhash{'store_'.$selhash{'pre_'.$key.'_link'}}) { 147: delete $selhash{'store_'.$selhash{'pre_'.$key.'_link'}}; 148: } 149: } 150: } 151: # deleting the previously cached listing 152: foreach (keys %selhash) { 153: if ($_ =~ /^pre_/ && $_ =~/link$/) { 154: my $key = $_; 155: $key =~ s/^pre_//; 156: $key =~ s/_[^_]*$//; 157: delete $selhash{'pre_'.$key.'_title'}; 158: delete $selhash{'pre_'.$key.'_link'}; 159: } 160: } 161: } 162: # - 163: } 164: } 165: # ----------------------------- successtied is now '1' if in working selectmode 166: my ($errtext,$fatal)=&mapread(&Apache::lonnet::filelocation('',$url),''); 167: if ($fatal==1) { 168: $r->print('<p><b><font color="red">'.&mt('Map contents are not shown in order.').'</font></b></p><br />'); 169: } 170: my $idx=0; 171: foreach (&attemptread(&Apache::lonnet::filelocation('',$url))) { 172: if (defined($_)) { 173: $idx++; 174: if ($successtied) { 175: $r->print('<form name="form'.$idx.'">'); 176: } 177: my ($title,$url)=split(/\:/,$_); 178: $title=~s/\&colon\;/\:/g; 179: $url=~s/\&colon\;/\:/g; 180: unless ($title) { $title=(split(/\//,$url))[-1] }; 181: unless ($title) { $title='<i>'.&mt('Empty').'</i>'; } 182: if ($url) { 183: if ($successtied) { 184: my $checked=''; 185: if ($selhash{'store_'.$url}) { 186: $checked=" checked"; 187: } 188: $selhash{"pre_${idx}_link"}=$url; 189: $selhash{"pre_${idx}_title"}=$title; 190: 191: $r->print(<<ENDCHECKBOX); 192: <input type='checkbox' name='filelink' 193: value='$url' onClick='javascript:queue("form$idx")'$checked> 194: <input type='hidden' name='title' value='$title'> 195: ENDCHECKBOX 196: } 197: $r->print('<a href="'.&Apache::lonratsrv::qtescape($url).'">'); 198: } 199: $r->print(&Apache::lonratsrv::qtescape($title)); 200: if ($url) { $r->print('</a>'); } 201: if ($successtied) { 202: $r->print('</form>'); 203: } else { 204: $r->print('<br>'); 205: } 206: } 207: } 208: $r->print('</body></html>'); 209: if ($successtied) { 210: untie %selhash; 211: } 212: } 213: 214: # ----------------------------------------------------------- Clean out selhash 215: sub start_fresh_session { 216: foreach (keys %selhash) { 217: if ($_ =~ /^pre_/) { 218: delete $selhash{$_}; 219: } 220: if ($_ =~ /^store/) { 221: delete $selhash{$_}; 222: } 223: } 224: } 225: 226: 227: # ================================================================ Main Handler 228: 229: sub handler { 230: my $r=shift; 231: 232: if ($r->header_only) { 233: &Apache::loncommon::content_type($r,'text/html'); 234: $r->send_http_header; 235: return OK; 236: } 237: 238: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'}, 239: ['forceselect','launch']); 240: 241: my %hash; 242: my %bighash; 243: my $requrl=$r->uri; 244: 245: $successtied=0; 246: # ------------------------------------------------------------ Tie symb db file 247: my $disurl=''; 248: my $dismapid=''; 249: my $exitdisid = ''; 250: my $arrow_dir = ''; 251: 252: if (($ENV{'request.course.fn'}) && (!$ENV{'form.forceselect'})) { 253: my $last; 254: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db', 255: &GDBM_READER(),0640)) { 256: $last=$hash{'last_direction'}; 257: untie(%hash); 258: } 259: my $direction=''; 260: my $prevmap=''; 261: if ($last) { 262: ($prevmap,$direction)=(split(/\_\_\_/,$last)); 263: } 264: # ------------------------------------------------------------- Tie big db file 265: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db', 266: &GDBM_READER(),0640)) { 267: my $disid=''; 268: my $randomout =''; 269: 270: if ($direction eq 'back') { 271: $disid=$bighash{'map_finish_'.$requrl}; 272: } else { 273: $disid=$bighash{'map_start_'.$requrl}; 274: } 275: if ($disid) { 276: $disurl=$bighash{'src_'.$disid}; 277: $dismapid=(split(/\./,$disid))[1]; 278: $randomout = $bighash{'randomout_'.$disid}; 279: } elsif (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db', 280: &GDBM_READER(),0640)) { 281: $last=$hash{'last_known'}; 282: untie(%hash); 283: } 284: 285: 286: # ----------- If this is an empty one, or hidden, skip to next non-empty or non-hidden one 287: while ( ((!$disurl) && ($disid)) || ($randomout && $disid) ) { 288: $direction=($direction?$direction:'forward'); 289: ($disid,$requrl)= 290: &Apache::lonpageflip::fullmove($disid, 291: &Apache::lonnet::declutter($requrl),$direction); 292: if ($disid) { 293: $disurl=$bighash{'src_'.$disid}; 294: $dismapid=(split(/\./,$disid))[1]; 295: $randomout = $bighash{'randomout_'.$disid}; 296: } 297: } 298: $exitdisid = $disid; 299: $arrow_dir = $direction; 300: 301: # --------------------------------------- Untie hash, make sure to come by here 302: untie(%bighash); 303: } 304: } 305: 306: # now either disurl is set (going to first page), or we need another display 307: if ($disurl) { 308: # -------------------------------------------------- Has first or last resource 309: &Apache::lonnet::symblist($requrl,$disurl => $dismapid, 310: 'last_known' => &Apache::lonnet::declutter($disurl)); 311: &Apache::loncommon::content_type($r,'text/html'); 312: $r->header_out(Location => 'http://'.$ENV{'HTTP_HOST'}.$disurl); 313: return REDIRECT; 314: } else { 315: &Apache::loncommon::content_type($r,'text/html'); 316: $r->send_http_header; 317: if ($exitdisid eq '') { 318: my %lt =&Apache::lonlocal::texthash( 319: 'back' => 'beginning', 320: 'forward' => 'end', 321: 'emfo' => 'Empty Folder/Sequence', 322: 'nere' => 'Next resource could not be displayed', 323: 'goba' => 'Go Back', 324: 'nacc' => 'Navigate Course Content', 325: ); 326: my $warnmsg = 'As all folders and sequences '; 327: if ($arrow_dir eq 'forward') { 328: $warnmsg .= &mt('following the current resource were empty').','; 329: } elsif ($arrow_dir eq 'back') { 330: $warnmsg .= &mt('preceding the current resource were empty').','; 331: } 332: $warnmsg .= &mt('you have now reached the').' '.$lt{$arrow_dir}.' '.&mt('of the course.'); 333: my $bodytag=&Apache::loncommon::bodytag('Empty Folder/Sequence'); 334: $r->print(<<ENDNONE); 335: <head><title>$lt{'emfo'}</title></head> 336: $bodytag 337: <h3>$lt{'nere'}</h3> 338: <p>$warnmsg</p> 339: <ul> 340: <li><a href="javascript:history.go(-1)">$lt{'goba'}</a></li> 341: <li><a href="/adm/navmaps">$lt{'nacc'}</a></li> 342: </ul> 343: </body> 344: </html> 345: ENDNONE 346: } else { 347: &viewmap($r,$requrl); 348: } 349: return OK; 350: } 351: } 352: 353: 1; 354: __END__ 355: 356: 357: 358: 359: 360: 361: