apps/explorer/views.py

   1 # -*- coding: utf-8 -*-
   2 import urllib2
   3 import hg, re
   4 from datetime import date
   5
   6 import librarian
   7
   8 from librarian import html, parser, dcparser
   9 from librarian import ParseError, ValidationError
  10
  11 from django.conf import settings
  12 from django.contrib.auth.decorators import login_required, permission_required
  13
  14 from django.core.urlresolvers import reverse
  15 from django.http import HttpResponseRedirect, HttpResponse, HttpResponseNotFound
  16 from django.utils import simplejson as json
  17 from django.views.generic.simple import direct_to_template
  18 from django.contrib.auth.decorators import login_required
  19
  20 from explorer import forms, models
  21 from toolbar import models as toolbar_models
  22
  23 from django.forms.util import ErrorList
  24
  25 import wlrepo
  26
  27 #
  28 # Some useful decorators
  29
  30 def file_branch(fileid, user=None):
  31     parts = fileid.split('$')
  32     return ('personal_'+ user.username + '_' if user is not None else '') \
  33         + 'file_' + parts[0]
  34
  35 def file_path(fileid):
  36     return 'pub_'+fileid+'.xml'
  37
  38 def with_repo(view):
  39     """Open a repository for this view"""
  40     def view_with_repo(request, *args, **kwargs):
  41         kwargs['repo'] = wlrepo.MercurialLibrary(settings.REPOSITORY_PATH)
  42         return view(request, *args, **kwargs)
  43     return view_with_repo
  44
  45 #
  46 def ajax_login_required(view):
  47     """Similar ro @login_required, but instead of redirect,
  48     just return some JSON stuff with error."""
  49     def view_with_auth(request, *args, **kwargs):
  50         if request.user.is_authenticated():
  51             return view(request, *args, **kwargs)
  52         # not authenticated
  53         return HttpResponse( json.dumps({'result': 'access_denied', 'errors': ['Brak dostępu.']}) );
  54     return view_with_auth
  55
  56 #
  57 # View all files
  58 #
  59 @with_repo
  60 def file_list(request, repo):
  61     import api.forms
  62     bookform = api.forms.DocumentUploadForm()
  63     return direct_to_template(request, 'explorer/file_list.html', extra_context={
  64         'files': repo.documents(), 'bookform': bookform,
  65     })
  66
  67 @permission_required('explorer.can_add_files')
  68 @with_repo
  69 def file_upload(request, repo):
  70     other_errors = []
  71     if request.method == 'POST':
  72         form = forms.BookUploadForm(request.POST, request.FILES)
  73         if form.is_valid():
  74             try:
  75                 # prepare the data
  76                 f = request.FILES['file']
  77                 decoded = f.read().decode('utf-8')
  78                 fileid = form.cleaned_data['bookname'].lower()
  79                 rpath = file_path(fileid)
  80
  81                 if form.cleaned_data['autoxml']:
  82                     decoded = librarian.wrap_text(decoded, unicode(date.today()) )
  83
  84                 def upload_action():
  85                     repo._add_file(rpath, decoded.encode('utf-8') )
  86                     repo._commit(message="File %s uploaded by user %s" % \
  87                         (rpath, request.user.username), user=request.user.username)
  88
  89                 repo.in_branch(upload_action, 'default')
  90
  91                 # if everything is ok, redirect to the editor
  92                 return HttpResponseRedirect( reverse('editor_view',
  93                         kwargs={'path': fileid}) )
  94
  95             except hg.RepositoryException, e:
  96                 other_errors.append(u'Błąd repozytorium: ' + unicode(e) )
  97             #except UnicodeDecodeError, e:
  98             #    other_errors.append(u'Niepoprawne kodowanie pliku: ' + e.reason \
  99             #     + u'. Żądane kodowanie: ' + e.encoding)
 100         # invalid form
 101
 102     # get
 103     form = forms.BookUploadForm()
 104     return direct_to_template(request, 'explorer/file_upload.html',\
 105         extra_context = {'form' : form, 'other_errors': other_errors})
 106
 107 #
 108 # Edit the file
 109 #
 110
 111 @ajax_login_required
 112 @with_repo
 113 def file_xml(request, repo, path):
 114     rpath = file_path(path)
 115     if request.method == 'POST':
 116         errors = None
 117         warnings = None
 118         form = forms.BookForm(request.POST)
 119         if form.is_valid():
 120             print 'Saving whole text.', request.user.username
 121             try:
 122                 # encode it back to UTF-8, so we can put it into repo
 123                 encoded_data = form.cleaned_data['content'].encode('utf-8')
 124
 125                 def save_action():
 126                     repo._add_file(rpath, encoded_data)
 127                     repo._commit(message=(form.cleaned_data['commit_message'] or 'Lokalny zapis platformy.'),\
 128                          user=request.user.username)
 129
 130                 try:
 131                     # wczytaj dokument z ciągu znaków -> weryfikacja
 132                     document = parser.WLDocument.from_string(form.cleaned_data['content'])
 133                 except (ParseError, ValidationError), e:
 134                     warnings = [u'Niepoprawny dokument XML: ' + unicode(e.message)]
 135
 136                 #  save to user's branch
 137                 repo.in_branch(save_action, file_branch(path, request.user) );
 138             except UnicodeDecodeError, e:
 139                 errors = [u'Błąd kodowania danych przed zapisem: ' + unicode(e.message)]
 140             except hg.RepositoryException, e:
 141                 errors = [u'Błąd repozytorium: ' + unicode(e.message)]
 142
 143         if not errors:
 144             errors = dict( (field[0], field[1].as_text()) for field in form.errors.iteritems() )
 145
 146         return HttpResponse( json.dumps({'result': errors and 'error' or 'ok',
 147             'errors': errors, 'warnings': warnings}) );
 148
 149     form = forms.BookForm()
 150     data = repo.get_file(rpath, file_branch(path, request.user))
 151     form.fields['content'].initial = data
 152     return HttpResponse( json.dumps({'result': 'ok', 'content': data}) )
 153
 154 @ajax_login_required
 155 @with_repo
 156 def file_update_local(request, path, repo):
 157     result = None
 158     errors = None
 159
 160     wlock = repo.write_lock()
 161     try:
 162         tipA = repo.get_branch_tip('default')
 163         tipB = repo.get_branch_tip( file_branch(path, request.user) )
 164
 165         nodeA = repo.getnode(tipA)
 166         nodeB = repo.getnode(tipB)
 167
 168         # do some wild checks - see file_commit() for more info
 169         if (repo.common_ancestor(tipA, tipB) == nodeA) \
 170         or (nodeB in nodeA.parents()):
 171             result = 'nothing-to-do'
 172         else:
 173             # Case 2+
 174             repo.merge_revisions(tipB, tipA, \
 175                 request.user.username, 'Personal branch update.')
 176             result = 'done'
 177     except hg.UncleanMerge, e:
 178         errors = [e.message]
 179         result = 'fatal-error'
 180     except hg.RepositoryException, e:
 181         errors = [e.message]
 182         result = 'fatal-error'
 183     finally:
 184         wlock.release()
 185
 186     if result is None:
 187         raise Exception("Ouch, this shouldn't happen!")
 188
 189     return HttpResponse( json.dumps({'result': result, 'errors': errors}) );
 190
 191 @ajax_login_required
 192 @with_repo
 193 def file_commit(request, path, repo):
 194     result = None
 195     errors = None
 196     local_modified = False
 197     if request.method == 'POST':
 198         form = forms.MergeForm(request.POST)
 199
 200         if form.is_valid():
 201             wlock = repo.write_lock()
 202             try:
 203                 tipA = repo.get_branch_tip('default')
 204                 tipB = repo.get_branch_tip( file_branch(path, request.user) )
 205
 206                 nodeA = repo.getnode(tipA)
 207                 nodeB = repo.getnode(tipB)
 208
 209                 print repr(nodeA), repr(nodeB), repo.common_ancestor(tipA, tipB), repo.common_ancestor(tipB, tipA)
 210
 211                 if repo.common_ancestor(tipB, tipA) == nodeA:
 212                     # Case 1:
 213                     #         * tipB
 214                     #         |
 215                     #         * <- can also be here!
 216                     #        /|
 217                     #       / |
 218                     # tipA *  *
 219                     #      |  |
 220                     # The local branch has been recently updated,
 221                     # so we don't need to update yet again, but we need to
 222                     # merge down to default branch, even if there was
 223                     # no commit's since last update
 224                     repo.merge_revisions(tipA, tipB, \
 225                         request.user.username, form.cleaned_data['message'])
 226                     result = 'done'
 227                 elif any( p.branch()==nodeB.branch() for p in nodeA.parents()):
 228                     # Case 2:
 229                     #
 230                     # tipA *  * tipB
 231                     #      |\ |
 232                     #      | \|
 233                     #      |  *
 234                     #      |  |
 235                     # Default has no changes, to update from this branch
 236                     # since the last merge of local to default.
 237                     if nodeB not in nodeA.parents():
 238                         repo.merge_revisions(tipA, tipB, \
 239                             request.user.username, form.cleaned_data['message'])
 240                         result = 'done'
 241                     else:
 242                         result = 'nothing-to-do'
 243                 elif repo.common_ancestor(tipA, tipB) == nodeB:
 244                     # Case 3:
 245                     # tipA *
 246                     #      |
 247                     #      * <- this case overlaps with previos one
 248                     #      |\
 249                     #      | \
 250                     #      |  * tipB
 251                     #      |  |
 252                     #
 253                     # There was a recent merge to the defaul branch and
 254                     # no changes to local branch recently.
 255                     #
 256                     # Use the fact, that user is prepared to see changes, to
 257                     # update his branch if there are any
 258                     if nodeB not in nodeA.parents():
 259                         repo.merge_revisions(tipB, tipA, \
 260                             request.user.username, 'Personal branch update during merge.')
 261                         local_modified = True
 262                         result = 'done'
 263                     else:
 264                         result = 'nothing-to-do'
 265                 else:
 266                     # both branches have changes made to them, so
 267                     # first do an update
 268                     repo.merge_revisions(tipB, tipA, \
 269                         request.user.username, 'Personal branch update during merge.')
 270
 271                     local_modified = True
 272
 273                     # fetch the new tip
 274                     tipB = repo.get_branch_tip( file_branch(path, request.user) )
 275
 276                     # and merge back to the default
 277                     repo.merge_revisions(tipA, tipB, \
 278                         request.user.username, form.cleaned_data['message'])
 279                     result = 'done'
 280             except hg.UncleanMerge, e:
 281                 errors = [e.message]
 282                 result = 'fatal-error'
 283             except hg.RepositoryException, e:
 284                 errors = [e.message]
 285                 result = 'fatal-error'
 286             finally:
 287                 wlock.release()
 288
 289         if result is None:
 290             errors = [ form.errors['message'].as_text() ]
 291             if len(errors) > 0:
 292                 result = 'fatal-error'
 293
 294         return HttpResponse( json.dumps({'result': result, 'errors': errors, 'localmodified': local_modified}) );
 295
 296     return HttpResponse( json.dumps({'result': 'fatal-error', 'errors': ['No data posted']}) )
 297
 298
 299 @ajax_login_required
 300 @with_repo
 301 def file_dc(request, path, repo):
 302     errors = None
 303     rpath = file_path(path)
 304
 305     if request.method == 'POST':
 306         form = forms.DublinCoreForm(request.POST)
 307
 308         if form.is_valid():
 309
 310             def save_action():
 311                 file_contents = repo._get_file(rpath)
 312
 313                 # wczytaj dokument z repozytorium
 314                 document = parser.WLDocument.from_string(file_contents)
 315                 document.book_info.update(form.cleaned_data)
 316
 317                 # zapisz
 318                 repo._write_file(rpath, document.serialize().encode('utf-8'))
 319                 repo._commit( \
 320                     message=(form.cleaned_data['commit_message'] or 'Lokalny zapis platformy.'), \
 321                     user=request.user.username )
 322
 323             try:
 324                 repo.in_branch(save_action, file_branch(path, request.user) )
 325             except UnicodeEncodeError, e:
 326                 errors = ['Bład wewnętrzny: nie można zakodować pliku do utf-8']
 327             except (ParseError, ValidationError), e:
 328                 errors = [e.message]
 329
 330         if errors is None:
 331             errors = ["Pole '%s': %s\n" % (field[0], field[1].as_text()) for field in form.errors.iteritems()]
 332
 333         return HttpResponse( json.dumps({'result': errors and 'error' or 'ok', 'errors': errors}) );
 334
 335     # this is unused currently, but may come in handy
 336     content = []
 337
 338     try:
 339         fulltext = repo.get_file(rpath, file_branch(path, request.user))
 340         bookinfo = dcparser.BookInfo.from_string(fulltext)
 341         content = bookinfo.to_dict()
 342     except (ParseError, ValidationError), e:
 343         errors = [e.message]
 344
 345     return HttpResponse( json.dumps({'result': errors and 'error' or 'ok',
 346         'errors': errors, 'content': content }) )
 347
 348 # Display the main editor view
 349
 350 @login_required
 351 # @with_repo
 352 def display_editor(request, path):
 353     # this is the only entry point where we create an autobranch for the user
 354     # if it doesn't exists. All other views SHOULD fail.
 355     #def ensure_branch_exists():
 356     #    parent = repo.get_branch_tip('default')
 357     #    repo._create_branch(file_branch(path, request.user), parent)
 358
 359 #    try:
 360     #    repo.with_wlock(ensure_branch_exists)
 361
 362     return direct_to_template(request, 'explorer/editor.html', extra_context={
 363         'fileid': path,
 364         'panel_list': ['lewy', 'prawy'],
 365         'availble_panels': models.EditorPanel.objects.all(),
 366         # 'scriptlets': toolbar_models.Scriptlet.objects.all()
 367     })
 368 #    except KeyError:
 369 #        return direct_to_template(request, 'explorer/nofile.html', \
 370 #            extra_context = { 'fileid': path })
 371
 372 # ===============
 373 # = Panel views =
 374 # ===============
 375 class panel_view(object):
 376
 377     def __new__(cls, request, name, path, **kwargs):
 378     #try:
 379         panel = models.EditorPanel.objects.get(id=name)
 380         method = getattr(cls, name + '_panel', None)
 381         if not panel or method is None:
 382             raise HttpResponseNotFound
 383
 384         extra_context = method(request, path, panel, **kwargs)
 385
 386         if not isinstance(extra_context, dict):
 387             return extra_context
 388
 389         extra_context.update({
 390             'toolbar_groups': panel.toolbar_groups.all(),
 391             'toolbar_extra_group': panel.toolbar_extra,
 392             'fileid': path
 393         })
 394
 395         return direct_to_template(request, 'explorer/panels/'+name+'.html',\
 396             extra_context=extra_context)
 397
 398     @staticmethod
 399     @ajax_login_required
 400     @with_repo
 401     def xmleditor_panel(request, path, panel, repo):
 402         rpath = file_path(path)
 403         return {'text': repo.get_file(rpath, file_branch(path, request.user))}
 404
 405     @staticmethod
 406     @ajax_login_required
 407     def gallery_panel(request, path, panel):
 408         return {'form': forms.ImageFoldersForm() }
 409
 410     @staticmethod
 411     @ajax_login_required
 412     @with_repo
 413     def htmleditor_panel(request, path, panel, repo):
 414         rpath = file_path(path)
 415         user_branch = file_branch(path, request.user)
 416         try:
 417             result = html.transform(repo.get_file(rpath, user_branch), is_file=False)
 418             print "HTML: %r" % result
 419             return {'html': result}
 420         except (ParseError, ValidationError), e:
 421             return direct_to_template(request, 'explorer/panels/parse_error.html', extra_context={
 422             'fileid': path, 'exception_type': type(e).__name__, 'exception': e,
 423             'panel_name': panel.display_name})
 424
 425     @staticmethod
 426     @ajax_login_required
 427     @with_repo
 428     def dceditor_panel(request, path, panel, repo):
 429         user_branch = file_branch(path, request.user)
 430         rpath = file_path(path)
 431         try:
 432             doc_text = repo.get_file(rpath, user_branch)
 433             document = parser.WLDocument.from_string(doc_text)
 434             form = forms.DublinCoreForm(info=document.book_info)
 435             return {'form': form}
 436         except (ParseError, ValidationError), e:
 437             return direct_to_template(request, 'explorer/panels/parse_error.html', extra_context={
 438             'fileid': path, 'exception_type': type(e).__name__, 'exception': e,
 439             'panel_name': panel.display_name})
 440
 441 ##
 442 ## Editor "commands" and "dialogs"
 443 ##
 444 @login_required
 445 @with_repo
 446 def print_html(request, path, repo):
 447     user_branch = file_branch(path, request.user)
 448     rpath = file_path(path)
 449     return HttpResponse(
 450         html.transform(repo.get_file(rpath, user_branch), is_file=False),
 451         mimetype="text/html")
 452
 453 @login_required
 454 @with_repo
 455 def print_xml(request, path, repo):
 456     user_branch = file_branch(path, request.user)
 457     rpath = file_path(path)
 458     return HttpResponse( repo.get_file(rpath, user_branch), mimetype="text/plain; charset=utf-8")
 459
 460 @permission_required('explorer.can_add_files')
 461 def split_text(request, path):
 462     rpath = file_path(path)
 463     valid = False
 464     if request.method == "POST":
 465         sform = forms.SplitForm(request.POST, prefix='splitform')
 466         dcform = forms.DublinCoreForm(request.POST, prefix='dcform')
 467
 468         print "validating sform"
 469         if sform.is_valid():
 470             valid = True
 471 #            if sform.cleaned_data['autoxml']:
 472 #                print "validating dcform"
 473 #                valid = dcform.is_valid()
 474
 475         print "valid is ", valid
 476
 477         if valid:
 478             uri = path + '$' + sform.cleaned_data['partname']
 479             child_rpath = file_path(uri)
 480             repo = hg.Repository(settings.REPOSITORY_PATH)
 481
 482             # save the text into parent's branch
 483             def split_action():
 484                 if repo._file_exists(child_rpath):
 485                     el = sform._errors.get('partname', ErrorList())
 486                     el.append("Part with this name already exists")
 487                     sform._errors['partname'] = el
 488                     return False
 489
 490                 fulltext = sform.cleaned_data['fulltext']
 491                 fulltext = fulltext.replace(u'<include-tag-placeholder />',
 492                     librarian.xinclude_forURI(u'wlrepo://'+uri) )
 493
 494                 repo._write_file(rpath, fulltext.encode('utf-8'))
 495
 496                 newtext = sform.cleaned_data['splittext']
 497                 if sform.cleaned_data['autoxml']:
 498                     # this is a horrible hack - really
 499                     bi = dcparser.BookInfo.from_element(librarian.DEFAULT_BOOKINFO.to_etree())
 500                     bi.update(dcform.data)
 501
 502                     newtext = librarian.wrap_text(newtext, \
 503                         unicode(date.today()), bookinfo=bi )
 504
 505                 repo._add_file(child_rpath, newtext.encode('utf-8'))
 506                 repo._commit(message="Split from '%s' to '%s'" % (path, uri), \
 507                     user=request.user.username )
 508                 return True
 509
 510             if repo.in_branch(split_action, file_branch(path, request.user)):
 511                 # redirect to success
 512                 import urllib
 513                 uri = urllib.quote( unicode(uri).encode('utf-8'))
 514                 return HttpResponseRedirect( reverse('split-success',\
 515                     kwargs={'path': path})+'?child='+uri )
 516     else:
 517         try: # to read the current DC
 518             repo = hg.Repository(settings.REPOSITORY_PATH)
 519             fulltext = repo.get_file(rpath, file_branch(path, request.user))
 520             bookinfo = dcparser.BookInfo.from_string(fulltext)
 521         except (ParseError, ValidationError):
 522             bookinfo = librarian.DEFAULT_BOOKINFO
 523
 524         sform = forms.SplitForm(prefix='splitform')
 525         dcform = forms.DublinCoreForm(prefix='dcform', info=bookinfo)
 526
 527     return direct_to_template(request, 'explorer/split.html', extra_context={
 528         'splitform': sform, 'dcform': dcform, 'fileid': path} )
 529
 530 def split_success(request, path):
 531     return direct_to_template(request, 'explorer/split_success.html',\
 532         extra_context={'fileid': path, 'cfileid': request.GET['child']} )
 533
 534
 535 # =================
 536 # = Utility views =
 537 # =================
 538 @ajax_login_required
 539 def folder_images(request, folder):
 540     return direct_to_template(request, 'explorer/folder_images.html', extra_context={
 541         'images': models.get_images_from_folder(folder),
 542     })
 543
 544 def _add_references(message, issues):
 545     return message + " - " + ", ".join(map(lambda issue: "Refs #%d" % issue['id'], issues))
 546
 547 def _get_issues_for_file(fileid):
 548     uf = None
 549     try:
 550         uf = urllib2.urlopen(settings.REDMINE_URL + 'publications/issues/%s.json' % fileid)
 551         return json.loads(uf.read())
 552     except urllib2.HTTPError:
 553         return []
 554     finally:
 555         if uf: uf.close()
 556
 557 # =================
 558 # = Pull requests =
 559 # =================
 560 #def pull_requests(request):
 561 #    return direct_to_template(request, 'manager/pull_request.html', extra_context = {
 562 #        'objects': models.PullRequest.objects.all()} )