1: # The LearningOnline Network
2: # Documents
3: #
4: # $Id: lonextresedit.pm,v 1.8.2.4 2019/07/30 19:53:22 raeburn Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28:
29: package Apache::lonextresedit;
30:
31: use strict;
32: use Apache::Constants qw(:common :http);
33: use HTML::Entities;
34: use Apache::lonlocal;
35: use Apache::lonnet;
36: use Apache::loncommon;
37: use Apache::lonhtmlcommon;
38: use Apache::lonuserstate;
39: use LONCAPA::map();
40: use LONCAPA qw(:DEFAULT :match);
41:
42: sub handler {
43: my $r=shift;
44: &Apache::loncommon::content_type($r,'text/html');
45: $r->send_http_header;
46:
47: return OK if $r->header_only;
48:
49: # Check for access
50: if (! &Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
51: $env{'user.error.msg'}=
52: $r->uri.":mdc:0:0:Cannot modify course content.";
53: return HTTP_NOT_ACCEPTABLE;
54: }
55:
56: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
57: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
58: my $chome = $env{'course.'.$env{'request.course.id'}.'.home'};
59: my ($supplementalflag,$updated,$output,$errormsg,$residx,$url,$title,$symb);
60: if (($env{'form.folderpath'} =~ /^supplemental/) && ($env{'form.suppurl'})) {
61: $supplementalflag = 1;
62: }
63: if (($supplementalflag) || ($env{'form.symb'} =~ /^uploaded/)) {
64: ($updated,$output,$errormsg,$residx,$url,$title,$symb) =
65: &process_changes($supplementalflag,$cdom,$cnum,$chome);
66: if ($supplementalflag) {
67: if ($url ne $env{'form.suppurl'}) {
68: $env{'form.suppurl'} = $url;
69: }
70: if ($title ne $env{'form.title'}) {
71: $env{'form.title'} = $title;
72: }
73: $env{'form.idx'} = $residx;
74: } else {
75: if ($symb ne $env{'form.symb'}) {
76: $env{'form.symb'} = $symb;
77: }
78: }
79: } else {
80: $errormsg = &mt('Information about external resource to edit is missing.');
81: }
82: if ($updated) {
83: $output = &Apache::lonhtmlcommon::confirm_success(&mt('External Resource updated'));
84: }
85: if ($errormsg) {
86: $errormsg = '<p class="LC_error">'.$errormsg.'</p>';
87: }
88: my $js = &Apache::lonhtmlcommon::scripttag(&extedit_javascript());
89: my $pathitem = '<input type="hidden" name="folderpath" value="'.
90: &HTML::Entities::encode($env{'form.folderpath'},'<>&"').'" />';
91: $r->print(&Apache::loncommon::start_page('External Resource Editor',$js).
92: '<div class="LC_left_float">'.
93: $output.
94: $errormsg.
95: &extedit_form($supplementalflag,$residx,$url,$title,$pathitem,undef,
96: 'direct',$env{'form.symb'}).
97: '</div>'.&Apache::loncommon::end_page());
98: return OK;
99: }
100:
101: sub process_changes {
102: my ($supplementalflag,$cdom,$cnum,$chome) = @_;
103: my ($folder,$container,$output,$errormsg,$updated,$symb,$oldidx,$oldurl,
104: $oldtitle,$newidx,$newurl,$newtitle,$residx,$url,$title);
105: if ($env{'form.symb'}) {
106: $symb = $env{'form.symb'};
107: (my $map,$oldidx,$oldurl)=&Apache::lonnet::decode_symb($symb);
108: if ($map =~ m{^uploaded/$cdom/$cnum/(default(_\d+|))\.(sequence|page)$}) {
109: $folder = $1;
110: $container = $3;
111: }
112: $oldtitle = &Apache::lonnet::gettitle($env{'form.symb'});
113: } elsif ($env{'form.folderpath'}) {
114: $folder = &unescape( (split('&',$env{'form.folderpath'}))[-2] );
115: $oldurl = &unescape($env{'form.suppurl'});
116: $oldtitle = &unescape($env{'form.title'});
117: $container = 'sequence';
118: $supplementalflag = 1;
119: }
120: if ($oldurl =~ m{^ext/(.+)$}) {
121: my $external = $1;
122: if ($external =~ m{^https://}) {
123: $oldurl = $external;
124: } else {
125: $oldurl = 'http://'.$oldurl;
126: }
127: }
128: $url = $oldurl;
129: $title = $oldtitle;
130: if ($env{'form.importdetail'}) {
131: ($newtitle,$newurl,$newidx) =
132: map {&unescape($_)} split(/\=/,$env{'form.importdetail'});
133: }
134: if ($supplementalflag) {
135: $residx = $newidx;
136: } else {
137: $residx = $oldidx;
138: }
139: if ($folder && $container) {
140: if ($env{'form.importdetail'}) {
141: my ($errtext,$fatal,$mismatchedid,@imports);
142: if (!$supplementalflag) {
143: if (($oldidx) && ($oldidx != $newidx)) {
144: $mismatchedid = 1;
145: }
146: }
147: if ($mismatchedid) {
148: $errormsg = 'Wrong item identifier';
149: } elsif (($newtitle eq $oldtitle) && ($newurl eq $oldurl)) {
150: $output = &mt('No change');
151: } else {
152: my $map = "/uploaded/$cdom/$cnum/$folder.$container";
153: my ($errtext,$fatal) = &LONCAPA::map::mapread($map);
154: if ($fatal) {
155: $errormsg = &mt('Update failed: [_1].',$errtext);
156: } else {
157: my $saveurl = &LONCAPA::map::qtunescape($newurl);
158: my $savetitle = &LONCAPA::map::qtunescape($newtitle);
159: $LONCAPA::map::resources[$residx] =
160: join(':', ($savetitle,$saveurl,'true','normal','res'));
161: my ($outtext,$errtext) = &LONCAPA::map::storemap($map,1);
162: if ($errtext) {
163: $errormsg = &mt('Update failed: [_1].',$errtext);
164: } else {
165: $updated = 1;
166: $title = $newtitle;
167: if ($newurl ne $oldurl) {
168: $url = $newurl;
169: $newurl =~ s{^http://}{};
170: $newurl = "ext/$newurl";
171: }
172: if (!$supplementalflag) {
173: if ($newurl ne $oldurl) {
174: $symb = &Apache::lonnet::encode_symb($map,$residx,$newurl);
175: } else {
176: $symb = $env{'form.symb'};
177: if ($symb) {
178: &Apache::lonnet::devalidate_title_cache($symb);
179: }
180: }
181: }
182: my ($furl,$ferr) =
183: &Apache::lonuserstate::readmap("$cdom/$cnum");
184: if ($ferr) {
185: $errormsg = &mt('Reload failed: [_1].',$ferr);
186: } else {
187: unless ($supplementalflag) {
188: &Apache::loncommon::update_content_constraints($cdom,$cnum,$chome,$cdom.'_'.$cnum);
189: }
190: }
191: }
192: }
193: }
194: } else {
195: $output = &mt('No change');
196: }
197: } else {
198: $errormsg = &mt('Information about current external resource is incomplete.');
199: }
200: return ($updated,$output,$errormsg,$residx,$url,$title,$symb);
201: }
202:
203: sub extedit_form {
204: my ($supplementalflag,$residx,$orig_url,$orig_title,$pathitem,$helpitem,$caller,$symb,$disabled) = @_;
205: my %lt = &Apache::lonlocal::texthash(
206: ex => 'External Resource',
207: ed => 'Edit',
208: ee => 'External Resource Editor',
209: pr => 'Preview',
210: sv => 'Save',
211: ul => 'URL',
212: ti => 'Title',
213: al => 'Add Link',
214: );
215: my $formname = 'newext';
216: my $tabid = 'aa';
217: my $toggle = 'ext';
218: my $fieldsetid = 'uploadextform';
219: my $urlid = 'exturl';
220: my $size = 60;
221: if ($supplementalflag) {
222: $formname = 'newsuppext';
223: $tabid = 'ee';
224: $toggle = 'suppext';
225: $fieldsetid = 'uploadsuppextform';
226: $urlid = 'suppexturl';
227: }
228: my ($link,$legend,$active,$srcclass,$extsrc,$preview,$title,$save,
229: $fieldsetstyle,$action,$hiddenelem,$form);
230: $fieldsetstyle = 'display: none;';
231: $action = '/adm/coursedocs';
232: my $protocol = ($ENV{'SERVER_PORT'} == 443?'https':'http');
233: if ($residx) {
234: if ($caller eq 'direct') {
235: $fieldsetstyle = 'display: block;';
236: $action = '/adm/extresedit';
237: $legend = "<legend>$lt{'ee'}</legend>";
238: if ($symb) {
239: $hiddenelem = '<input type="hidden" name="symb" value="'.$symb.'" />';
240: } elsif ($supplementalflag) {
241: $hiddenelem = '<input type="hidden" name="suppurl" value="'.
242: &HTML::Entities::encode(&escape($orig_url),'<>&"').'" />'."\n".
243: '<input type="hidden" name="title" value="'.
244: &HTML::Entities::encode(&escape($orig_title),'<>&"').'" />';
245: }
246: } else {
247: $link = '<a class="LC_docs_ext_edit" href="javascript:editext('."'$residx'".');">'.$lt{'ed'}.'</a> '."\n";
248: $size = 40;
249: $active = '<input type="hidden" name="active" value="'.$tabid.'" />';
250: }
251: $formname = "editext_$residx";
252: $fieldsetid = "uploadext$residx";
253: $urlid = "exturl_$residx";
254: $srcclass = ' class="LC_nobreak"';
255: $extsrc = '<span class="LC_docs_ext_edit">'.$lt{'ul'}.' </span>';
256: $preview = ' <a class="LC_docs_ext_edit" href="javascript:extUrlPreview('."'$urlid','$protocol'".');">'.$lt{'pr'}.'</a>';
257: $title = '<span class="LC_docs_ext_edit">'.$lt{'ti'}.' </span>';
258: $save = $lt{'sv'};
259: } else {
260: $link = '<a class="LC_menubuttons_link" href="javascript:toggleUpload('."'$toggle'".');">'.$lt{'ex'}.'</a>'.$helpitem;
261: $legend = "<legend>$lt{'ex'}</legend>";
262: $extsrc = $lt{'ul'}.':<br />';
263: $title = $lt{'ti'}.':<br />';
264: $residx = 0;
265: $orig_url = 'http://';
266: $orig_title = $lt{'ex'};
267: $preview = '<input type="button" name="view" value="'.$lt{'pr'}.'" onclick="javascript:extUrlPreview('."'$urlid','$protocol'".');"'.$disabled.' />';
268: $save = $lt{'al'};
269: $pathitem .= '<br />';
270: }
271: $form = <<ENDFORM;
272: <form action="$action" method="post" name="$formname">
273: <fieldset id="$fieldsetid" style="$fieldsetstyle">
274: $legend
275: $active
276: <span$srcclass>
277: $extsrc
278: <input type="text" size="$size" name="exturl" id="$urlid" value="$orig_url" $disabled />
279: $preview
280: </span>
281: <br />
282: <span$srcclass>
283: $title
284: <input type="text" size="$size" name="exttitle" value="$orig_title" $disabled />
285: <input type="hidden" name="importdetail" value="" />
286: $pathitem
287: $hiddenelem
288: <input type="button" value="$save" onclick="javascript:setExternal(this.form,'$residx');" $disabled />
289: </span>
290: </fieldset>
291: </form>
292: ENDFORM
293: if (wantarray) {
294: return ($link,$form);
295: } else {
296: return $link.$form;
297: }
298: }
299:
300: sub display_editor {
301: my ($url,$folderpath,$symb,$idx,$type,$cdom,$cnum,$hostname) = @_;
302: my ($residx,$supplementalflag,$title,$pathitem,$output,$js,$navmap);
303: if ($folderpath =~ /^supplemental/) {
304: $supplementalflag = 1;
305: $residx = $idx;
306: $title = &unescape($env{'form.title'});
307: $pathitem = '<input type="hidden" name="folderpath" value="'.&HTML::Entities::encode($folderpath,'<>&"').'" />';
308: } elsif ($symb =~ /^uploaded/) {
309: (my $map,$residx,my $res) =
310: &Apache::lonnet::decode_symb($symb);
311: $title = &Apache::lonnet::gettitle($symb);
312: my $path = &Apache::loncommon::symb_to_docspath($symb,\$navmap);
313: $pathitem = '<input type="hidden" name="folderpath" value="'.&HTML::Entities::encode($path,'<>&"').'" />';
314: }
315: $js = &Apache::lonhtmlcommon::scripttag(&extedit_javascript());
316: my $args = { 'force_register' => $env{'form.register'} };
317: if ($hostname) {
318: $args->{'hostname'} = $hostname;
319: }
320: return &Apache::loncommon::start_page('External Resource Editor',$js,$args).
321: '<div class="LC_left_float">'.
322: &extedit_form($supplementalflag,$residx,$url,$title,$pathitem,undef,'direct',$symb).
323: '</div>'.
324: &Apache::loncommon::end_page();
325: }
326:
327: sub extedit_javascript {
328: my %js_lt = &Apache::lonlocal::texthash(
329: invurl => 'Invalid URL',
330: titbl => 'Title is blank',
331: mixfra => 'Show preview in pop-up? (http in https page + no framing)',
332: mixonly => 'Show preview in pop-up? (http in https page)',
333: fraonly => 'Show preview in pop-up? (framing disallowed)',
334: nopopup => 'Pop-up blocked',
335: nopriv => 'Insufficient privileges to use preview',
336: badurl => 'URL is not: http://hostname/path or https://hostname/path',
337: );
338: &js_escape(\%js_lt);
339:
340: my $urlregexp = <<'ENDREGEXP';
341: /^([a-z]([a-z]|\d|\+|-|\.)*):(\/\/(((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:)*@)?((\[(|(v[\da-f]{1,}\.(([a-z]|\d|-|\.|_|~)|[!\$&'\(\)\*\+,;=]|:)+))\])|((\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5]))|(([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=])*)(:\d*)?)(\/(([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)*)*|(\/((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)+(\/(([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)*)*)?)|((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)+(\/(([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)*)*)|((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)){0})(\?((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)|[\uE000-\uF8FF]|\/|\?)*)?(\#((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)|\/|\?)*)?$/i
342: ENDREGEXP
343:
344: return <<ENDJS;
345:
346: var regexp = $urlregexp;
347:
348: function setExternal(extform,residx) {
349: var title=extform.exttitle.value;
350: if (!String.trim) {
351: String.prototype.trim = function() {return this.replace(\/^\\s+|\\s+$\/g, "");}; }
352: var url=extform.exturl.value;
353: if (title == null || title.trim()=="") {
354: alert("$js_lt{'titbl'}");
355: extform.exttitle.focus();
356: return;
357: }
358: if (regexp.test(url)) {
359: url = escape(url);
360: title = escape(title);
361: if (residx > 0) {
362: eval("extform.importdetail.value=title+'='+url+'='+residx;extform.submit();");
363: } else {
364: eval("extform.importdetail.value=title+'='+url;extform.submit();");
365: }
366: } else {
367: alert("$js_lt{'invurl'}");
368: extform.exturl.focus();
369: return;
370: }
371: }
372:
373: function editext(residx) {
374: if (document.getElementById('uploadext'+residx)) {
375: var curr = document.getElementById('uploadext'+residx).style.display;
376: if (curr == 'none') {
377: disp = 'block';
378: } else {
379: disp = 'none';
380: }
381: document.getElementById('uploadext'+residx).style.display=disp;
382: }
383: resize_scrollbox('contentscroll','1','1');
384: return;
385: }
386:
387: function extUrlPreview(caller,protocol) {
388: if (document.getElementById(caller)) {
389: var url = document.getElementById(caller).value;
390: if (regexp.test(url)) {
391: var http_regex = /^http\:\/\//gi;
392: var mixed = 0;
393: var noiframe = 0;
394: var nopriv = 0;
395: var badurl = 0;
396: var name = "externalpreview";
397: if ((protocol == 'https') && (http_regex.test(url))) {
398: mixed = 1;
399: }
400: var http = new XMLHttpRequest();
401: var lcurl = "/adm/exturlcheck";
402: var params = "exturl="+url;
403: http.open("POST",lcurl, true);
404: http.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
405: http.onreadystatechange = function() {
406: if (http.readyState == 4) {
407: if (http.status == 200) {
408: if (http.responseText.length > 0) {
409: if (http.responseText == 1) {
410: noiframe = 1;
411: } else if (http.responseText == -1) {
412: nopriv = 1;
413: } else if (http.responseText == 0) {
414: badurl = 1;
415: }
416: }
417: openPreviewWindow(url,name,noiframe,mixed,nopriv,badurl);
418: }
419: }
420: }
421: http.send(params);
422: } else {
423: alert("$js_lt{'invurl'}");
424: }
425: }
426: }
427:
428: var previewLCWindow = null;
429: function openPreviewWindow(url,name,noiframe,mixed,nopriv,badurl) {
430: if (previewLCWindow !=null) {
431: previewLCWindow.close();
432: }
433: if (badurl) {
434: alert("$js_lt{'badurl'}");
435: } else if (nopriv) {
436: alert("$js_lt{'nopriv'}");
437: } else if ((noiframe == 1) || (mixed == 1)) {
438: var encurl = encodeURI(url);
439: var msg;
440: if (mixed == 1) {
441: if (noiframe == 1) {
442: msg = "$js_lt{'mixfra'}";
443: } else {
444: msg = "$js_lt{'mixonly'}";
445: }
446: } else {
447: msg = "$js_lt{'fraonly'}";
448: }
449: if (confirm(msg)) {
450: previewLCWindow = window.open(url,name,"height=400,width=500,scrollbars=1,resizable=1,menubar=0,location=1");
451: if (previewLCWindow != null) {
452: previewLCWindow.focus();
453: } else {
454: alert("$js_lt{'nopopup'}");
455: }
456: }
457: } else {
458: openMyModal(url,500,400,'yes');
459: }
460: }
461:
462: ENDJS
463:
464: }
465:
466: 1;
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