1 # -*- encoding: utf-8 -*-
5 __author__= "Ćukasz Rekucki"
6 __date__ = "$2009-09-25 15:49:50$"
7 __doc__ = "Module documentation."
9 from piston.handler import BaseHandler, AnonymousBaseHandler
12 from datetime import date
14 from django.core.urlresolvers import reverse
15 from django.utils import simplejson as json
19 from librarian import dcparser
22 from explorer.models import PullRequest, GalleryForDocument
25 import api.forms as forms
26 import api.response as response
27 from api.utils import validate_form, hglibrary, natural_order
28 from api.models import PartCache
34 log = logging.getLogger('platforma.api')
38 # Document List Handlers
40 class BasicLibraryHandler(AnonymousBaseHandler):
41 allowed_methods = ('GET',)
44 def read(self, request, lib):
45 """Return the list of documents."""
47 'url': reverse('document_view', args=[docid]),
48 'name': docid } for docid in lib.documents() ]
50 return {'documents' : document_list}
53 class LibraryHandler(BaseHandler):
54 allowed_methods = ('GET', 'POST')
55 anonymous = BasicLibraryHandler
58 def read(self, request, lib):
59 """Return the list of documents."""
63 for docid in lib.documents():
65 'url': reverse('document_view', args=[docid]),
70 parts = PartCache.objects.defer('part_id')\
71 .values_list('part_id', 'document_id').distinct()
73 document_tree = dict(documents)
75 for part, docid in parts:
76 # this way, we won't display broken links
77 if not documents.has_key(part):
78 log.info("NOT FOUND: %s", part)
81 parent = documents[docid]
82 child = documents[part]
84 # not top-level anymore
85 document_tree.pop(part)
86 parent['parts'].append(child)
88 for doc in documents.itervalues():
89 doc['parts'].sort(key=natural_order(lambda d: d['name']))
91 return {'documents': sorted(document_tree.itervalues(),
92 key=natural_order(lambda d: d['name']) ) }
94 @validate_form(forms.DocumentUploadForm, 'POST')
96 def create(self, request, form, lib):
97 """Create a new document."""
99 if form.cleaned_data['ocr_data']:
100 data = form.cleaned_data['ocr_data']
102 data = request.FILES['ocr_file'].read().decode('utf-8')
105 return response.BadRequest().django_response('You must pass ocr_data or ocr_file.')
107 if form.cleaned_data['generate_dc']:
108 data = librarian.wrap_text(data, unicode(date.today()))
110 docid = form.cleaned_data['bookname']
115 log.info("DOCID %s", docid)
116 doc = lib.document_create(docid)
117 # document created, but no content yet
120 doc = doc.quickwrite('xml', data.encode('utf-8'),
121 '$AUTO$ XML data uploaded.', user=request.user.username)
124 # rollback branch creation
126 raise LibraryException(traceback.format_exc())
128 url = reverse('document_view', args=[doc.id])
130 return response.EntityCreated().django_response(\
134 'revision': doc.revision },
138 except LibraryException, e:
140 return response.InternalError().django_response(\
141 {'exception': traceback.format_exc()} )
142 except DocumentAlreadyExists:
143 # Document is already there
144 return response.EntityConflict().django_response(\
145 {"reason": "Document %s already exists." % docid})
150 class BasicDocumentHandler(AnonymousBaseHandler):
151 allowed_methods = ('GET',)
154 def read(self, request, docid, lib):
156 doc = lib.document(docid)
157 except RevisionNotFound:
162 'html_url': reverse('dochtml_view', args=[doc.id]),
163 'text_url': reverse('doctext_view', args=[doc.id]),
164 'dc_url': reverse('docdc_view', args=[doc.id]),
165 'public_revision': doc.revision,
173 class DocumentHandler(BaseHandler):
174 allowed_methods = ('GET', 'PUT')
175 anonymous = BasicDocumentHandler
178 def read(self, request, docid, lib):
179 """Read document's meta data"""
180 log.info("Read %s", docid)
182 doc = lib.document(docid)
183 udoc = doc.take(request.user.username)
184 except RevisionNotFound, e:
185 return response.EntityNotFound().django_response({
186 'exception': type(e), 'message': e.message})
188 # is_shared = udoc.ancestorof(doc)
189 # is_uptodate = is_shared or shared.ancestorof(document)
193 'html_url': reverse('dochtml_view', args=[udoc.id]),
194 'text_url': reverse('doctext_view', args=[udoc.id]),
195 'dc_url': reverse('docdc_view', args=[udoc.id]),
196 'gallery_url': reverse('docgallery_view', args=[udoc.id]),
197 'merge_url': reverse('docmerge_view', args=[udoc.id]),
198 'user_revision': udoc.revision,
199 'user_timestamp': udoc.revision.timestamp,
200 'public_revision': doc.revision,
201 'public_timestamp': doc.revision.timestamp,
207 def update(self, request, docid, lib):
208 """Update information about the document, like display not"""
213 class DocumentHTMLHandler(BaseHandler):
214 allowed_methods = ('GET')
217 def read(self, request, docid, lib):
218 """Read document as html text"""
220 revision = request.GET.get('revision', 'latest')
222 if revision == 'latest':
223 document = lib.document(docid)
225 document = lib.document_for_rev(revision)
227 if document.id != docid:
228 return response.BadRequest().django_response({'reason': 'name-mismatch',
229 'message': 'Provided revision refers, to document "%s", but provided "%s"' % (document.id, docid) })
231 return librarian.html.transform(document.data('xml'), is_file=False, parse_dublincore=False)
232 except (EntryNotFound, RevisionNotFound), e:
233 return response.EntityNotFound().django_response({
234 'exception': type(e), 'message': e.message})
241 class DocumentGalleryHandler(BaseHandler):
242 allowed_methods = ('GET')
244 def read(self, request, docid):
245 """Read meta-data about scans for gallery of this document."""
248 for assoc in GalleryForDocument.objects.filter(document=docid):
249 dirpath = os.path.join(settings.MEDIA_ROOT, assoc.subpath)
251 if not os.path.isdir(dirpath):
252 log.info(u"[WARNING]: missing gallery %s", dirpath)
255 gallery = {'name': assoc.name, 'pages': []}
257 for file in sorted( os.listdir(dirpath) ):
258 file = file.encode('utf-8')
261 name, ext = os.path.splitext(os.path.basename(file))
263 if ext.lower() not in ['.png', '.jpeg', '.jpg']:
264 log.info("Ignoring: %s %s", name, ext)
267 url = settings.MEDIA_URL + assoc.subpath + u'/' + file.decode('utf-8');
268 gallery['pages'].append(url)
270 galleries.append(gallery)
278 XINCLUDE_REGEXP = r"""<(?:\w+:)?include\s+[^>]*?href=("|')wlrepo://(?P<link>[^\1]+?)\1\s*[^>]*?>"""
282 class DocumentTextHandler(BaseHandler):
283 allowed_methods = ('GET', 'POST')
286 def read(self, request, docid, lib):
287 """Read document as raw text"""
288 revision = request.GET.get('revision', 'latest')
290 if revision == 'latest':
291 document = lib.document(docid)
293 document = lib.document_for_rev(revision)
295 if document.id != docid:
296 return response.BadRequest().django_response({'reason': 'name-mismatch',
297 'message': 'Provided revision is not valid for this document'})
299 # TODO: some finer-grained access control
300 return document.data('xml')
301 except (EntryNotFound, RevisionNotFound), e:
302 return response.EntityNotFound().django_response({
303 'exception': type(e), 'message': e.message})
306 def create(self, request, docid, lib):
308 data = request.POST['contents']
309 revision = request.POST['revision']
311 if request.POST.has_key('message'):
312 msg = u"$USER$ " + request.POST['message']
314 msg = u"$AUTO$ XML content update."
316 current = lib.document(docid, request.user.username)
317 orig = lib.document_for_rev(revision)
320 return response.EntityConflict().django_response({
321 "reason": "out-of-date",
322 "provided_revision": orig.revision,
323 "latest_revision": current.revision })
325 # try to find any Xinclude tags
326 includes = [m.groupdict()['link'] for m in (re.finditer(\
327 XINCLUDE_REGEXP, data, flags=re.UNICODE) or []) ]
329 log.info("INCLUDES: %s", includes)
331 # TODO: provide useful routines to make this simpler
332 def xml_update_action(lib, resolve):
334 f = lib._fileopen(resolve('parts'), 'r')
335 stored_includes = json.loads(f.read())
340 if stored_includes != includes:
341 f = lib._fileopen(resolve('parts'), 'w+')
342 f.write(json.dumps(includes))
345 lib._fileadd(resolve('parts'))
347 # update the parts cache
348 PartCache.update_cache(docid, current.owner,\
349 stored_includes, includes)
351 # now that the parts are ok, write xml
352 f = lib._fileopen(resolve('xml'), 'w+')
353 f.write(data.encode('utf-8'))
357 ndoc = current.invoke_and_commit(\
358 xml_update_action, lambda d: (msg, current.owner) )
361 # return the new revision number
362 return response.SuccessAllOk().django_response({
365 "previous_revision": current.revision,
366 "revision": ndoc.revision,
367 'timestamp': ndoc.revision.timestamp,
368 "url": reverse("doctext_view", args=[ndoc.id])
371 if ndoc: lib._rollback()
373 except RevisionNotFound, e:
374 return response.EntityNotFound(mimetype="text/plain").\
375 django_response(e.message)
379 # Dublin Core handlers
381 # @requires librarian
383 class DocumentDublinCoreHandler(BaseHandler):
384 allowed_methods = ('GET', 'POST')
387 def read(self, request, docid, lib):
388 """Read document as raw text"""
390 revision = request.GET.get('revision', 'latest')
392 if revision == 'latest':
393 doc = lib.document(docid)
395 doc = lib.document_for_rev(revision)
398 if document.id != docid:
399 return response.BadRequest().django_response({'reason': 'name-mismatch',
400 'message': 'Provided revision is not valid for this document'})
402 bookinfo = dcparser.BookInfo.from_string(doc.data('xml'))
403 return bookinfo.serialize()
404 except (EntryNotFound, RevisionNotFound), e:
405 return response.EntityNotFound().django_response({
406 'exception': type(e), 'message': e.message})
409 def create(self, request, docid, lib):
411 bi_json = request.POST['contents']
412 revision = request.POST['revision']
414 if request.POST.has_key('message'):
415 msg = u"$USER$ " + request.PUT['message']
417 msg = u"$AUTO$ Dublin core update."
419 current = lib.document(docid, request.user.username)
420 orig = lib.document_for_rev(revision)
423 return response.EntityConflict().django_response({
424 "reason": "out-of-date",
425 "provided": orig.revision,
426 "latest": current.revision })
428 xmldoc = parser.WLDocument.from_string(current.data('xml'))
429 document.book_info = dcparser.BookInfo.from_json(bi_json)
432 ndoc = current.quickwrite('xml', \
433 document.serialize().encode('utf-8'),\
434 message=msg, user=request.user.username)
437 # return the new revision number
441 "previous_revision": current.revision,
442 "revision": ndoc.revision,
443 'timestamp': ndoc.revision.timestamp,
444 "url": reverse("docdc_view", args=[ndoc.id])
447 if ndoc: lib._rollback()
449 except RevisionNotFound:
450 return response.EntityNotFound().django_response()
452 class MergeHandler(BaseHandler):
453 allowed_methods = ('POST',)
455 @validate_form(forms.MergeRequestForm, 'POST')
457 def create(self, request, form, docid, lib):
458 """Create a new document revision from the information provided by user"""
460 target_rev = form.cleaned_data['target_revision']
462 doc = lib.document(docid)
463 udoc = doc.take(request.user.username)
465 if target_rev == 'latest':
466 target_rev = udoc.revision
468 if str(udoc.revision) != target_rev:
469 # user think doesn't know he has an old version
472 # Updating is teorericly ok, but we need would
473 # have to force a refresh. Sharing may be not safe,
474 # 'cause it doesn't always result in update.
476 # In other words, we can't lie about the resource's state
477 # So we should just yield and 'out-of-date' conflict
478 # and let the client ask again with updated info.
480 # NOTE: this could result in a race condition, when there
481 # are 2 instances of the same user editing the same document.
482 # Instance "A" trying to update, and instance "B" always changing
483 # the document right before "A". The anwser to this problem is
484 # for the "A" to request a merge from 'latest' and then
485 # check the parent revisions in response, if he actually
486 # merge from where he thinks he should. If not, the client SHOULD
487 # update his internal state.
488 return response.EntityConflict().django_response({
489 "reason": "out-of-date",
490 "provided": target_rev,
491 "latest": udoc.revision })
493 if not request.user.has_perm('explorer.book.can_share'):
494 # User is not permitted to make a merge, right away
495 # So we instead create a pull request in the database
497 comitter=request.user,
499 source_revision = str(udoc.revision),
501 comment = form.cleaned_data['message'] or '$AUTO$ Document shared.'
505 return response.RequestAccepted().django_response(\
506 ticket_status=prq.status, \
507 ticket_uri=reverse("pullrequest_view", args=[prq.id]) )
509 if form.cleaned_data['type'] == 'update':
510 # update is always performed from the file branch
512 success, changed = udoc.update(request.user.username)
514 if form.cleaned_data['type'] == 'share':
515 success, changed = udoc.share(form.cleaned_data['message'])
518 return response.EntityConflict().django_response({
519 'reason': 'merge-failure',
523 return response.SuccessNoContent().django_response()
525 nudoc = udoc.latest()
527 return response.SuccessAllOk().django_response({
529 "parent_user_resivion": udoc.revision,
530 "parent_revision": doc.revision,
531 "revision": nudoc.revision,
532 'timestamp': nudoc.revision.timestamp,