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Pierwsza implementacja DocumentModel.{merge|update}. Zmiana sposobu generowania URLi...
[redakcja.git] / apps / api / handlers / library_handlers.py
diff --git a/apps/api/handlers/library_handlers.py b/apps/api/handlers/library_handlers.py
index 0651352..5696cc9 100644 (file)
--- a/apps/api/handlers/library_handlers.py
+++ b/apps/api/handlers/library_handlers.py
@@ -6,19 +6,24 @@ __doc__ = "Module documentation."
 
 from piston.handler import BaseHandler, AnonymousBaseHandler
 
 
 from piston.handler import BaseHandler, AnonymousBaseHandler
 
-
-import settings
-import librarian
-import api.forms as forms
+import re
 from datetime import date
 
 from django.core.urlresolvers import reverse
 from datetime import date
 
 from django.core.urlresolvers import reverse
+from django.utils import simplejson as json
 
 
-from wlrepo import MercurialLibrary, RevisionNotFound, DocumentAlreadyExists
+import librarian
+import librarian.html
 from librarian import dcparser
 
 from librarian import dcparser
 
+from wlrepo import RevisionNotFound, LibraryException, DocumentAlreadyExists
+from explorer.models import PullRequest
+
+# internal imports
+import api.forms as forms
 import api.response as response
 from api.utils import validate_form, hglibrary
 import api.response as response
 from api.utils import validate_form, hglibrary
+from api.models import PartCache
 
 #
 # Document List Handlers
 
 #
 # Document List Handlers
@@ -44,11 +49,36 @@ class LibraryHandler(BaseHandler):
     def read(self, request, lib):
         """Return the list of documents."""
 
     def read(self, request, lib):
         """Return the list of documents."""
 
-        document_list = [{
-            'url': reverse('document_view', args=[docid]),
-            'name': docid } for docid in lib.documents() ]
+        documents = {}
+        
+        for docid in lib.documents():
+            documents[docid] = {
+                'url': reverse('document_view', args=[docid]),
+                'name': docid,
+                'parts': []
+            }
+
+        related = PartCache.objects.defer('part_id')\
+            .values_list('part_id', 'document_id').distinct()
 
 
-        return {'documents' : document_list }        
+        for part, docid in related:
+            # this way, we won't display broken links
+            if not documents.has_key(part):
+                continue
+
+            child = documents[part]
+            parent = documents[docid]
+            
+            if isinstance(parent, dict): # the parent is top-level
+                documents.pop(part)                
+                parent['parts'].append(child)
+                documents[part] = child['parts']
+            else: # not top-level
+                parent.append(child)
+            
+        return {
+            'documents': [d for d in documents.itervalues() if isinstance(d, dict)]
+        }
 
     @validate_form(forms.DocumentUploadForm, 'POST')
     @hglibrary
 
     @validate_form(forms.DocumentUploadForm, 'POST')
     @hglibrary
@@ -56,7 +86,7 @@ class LibraryHandler(BaseHandler):
         """Create a new document."""       
 
         if form.cleaned_data['ocr_data']:
         """Create a new document."""       
 
         if form.cleaned_data['ocr_data']:
-            data = form.cleaned_data['ocr_data'].encode('utf-8')
+            data = form.cleaned_data['ocr_data']
         else:            
             data = request.FILES['ocr_file'].read().decode('utf-8')
 
         else:            
             data = request.FILES['ocr_file'].read().decode('utf-8')
 
@@ -64,20 +94,35 @@ class LibraryHandler(BaseHandler):
             data = librarian.wrap_text(data, unicode(date.today()))
 
         docid = form.cleaned_data['bookname']
             data = librarian.wrap_text(data, unicode(date.today()))
 
         docid = form.cleaned_data['bookname']
+
         try:
         try:
-            doc = lib.document_create(docid)
-            doc = doc.quickwrite('xml', data, '$AUTO$ XML data uploaded.',
-                user=request.user.username)
-
-            url = reverse('document_view', args=[doc.id])
-
-            return response.EntityCreated().django_response(\
-                body = {
-                    'url': url,
-                    'name': doc.id,
-                    'revision': doc.revision },
-                url = url )
-                
+            lock = lib.lock()            
+            try:
+                print "DOCID", docid                
+                doc = lib.document_create(docid)
+                # document created, but no content yet
+
+                try:
+                    doc = doc.quickwrite('xml', data.encode('utf-8'),
+                        '$AUTO$ XML data uploaded.', user=request.user.username)
+                except Exception,e:
+                    # rollback branch creation
+                    lib._rollback()
+                    raise LibraryException("Exception occured:" + repr(e))
+
+                url = reverse('document_view', args=[doc.id])
+
+                return response.EntityCreated().django_response(\
+                    body = {
+                        'url': url,
+                        'name': doc.id,
+                        'revision': doc.revision },
+                    url = url )            
+            finally:
+                lock.release()
+        except LibraryException, e:
+            return response.InternalError().django_response(\
+                {'exception': repr(e) })                
         except DocumentAlreadyExists:
             # Document is already there
             return response.EntityConflict().django_response(\
         except DocumentAlreadyExists:
             # Document is already there
             return response.EntityConflict().django_response(\
@@ -98,6 +143,7 @@ class BasicDocumentHandler(AnonymousBaseHandler):
 
         result = {
             'name': doc.id,
 
         result = {
             'name': doc.id,
+            'html_url': reverse('dochtml_view', args=[doc.id,doc.revision]),
             'text_url': reverse('doctext_view', args=[doc.id,doc.revision]),
             'dc_url': reverse('docdc_view', args=[doc.id,doc.revision]),
             'public_revision': doc.revision,
             'text_url': reverse('doctext_view', args=[doc.id,doc.revision]),
             'dc_url': reverse('docdc_view', args=[doc.id,doc.revision]),
             'public_revision': doc.revision,
@@ -126,8 +172,9 @@ class DocumentHandler(BaseHandler):
 
         result = {
             'name': udoc.id,
 
         result = {
             'name': udoc.id,
-            'text_url': reverse('doctext_view', args=[doc.id,doc.revision]),
-            'dc_url': reverse('docdc_view', args=[doc.id,doc.revision]),
+            'html_url': reverse('dochtml_view', args=[udoc.id,udoc.revision]),
+            'text_url': reverse('doctext_view', args=[udoc.id,udoc.revision]),
+            'dc_url': reverse('docdc_view', args=[udoc.id,udoc.revision]),
             'user_revision': udoc.revision,
             'public_revision': doc.revision,            
         }       
             'user_revision': udoc.revision,
             'public_revision': doc.revision,            
         }       
@@ -138,10 +185,35 @@ class DocumentHandler(BaseHandler):
     def update(self, request, docid, lib):
         """Update information about the document, like display not"""
         return
     def update(self, request, docid, lib):
         """Update information about the document, like display not"""
         return
+#
+#
+#
+class DocumentHTMLHandler(BaseHandler):
+    allowed_methods = ('GET', 'PUT')
+
+    @hglibrary
+    def read(self, request, docid, revision, lib):
+        """Read document as html text"""
+        try:
+            if revision == 'latest':
+                document = lib.document(docid)
+            else:
+                document = lib.document_for_rev(revision)
+
+            return librarian.html.transform(document.data('xml'), is_file=False)
+        except RevisionNotFound:
+            return response.EntityNotFound().django_response()
+
+
+
 
 #
 # Document Text View
 #
 
 #
 # Document Text View
 #
+
+XINCLUDE_REGEXP = r"""<(?:\w+:)?include\s+[^>]*?href=("|')wlrepo://(?P<link>[^\1]+?)\1\s*[^>]*?>"""
+#
+#
 class DocumentTextHandler(BaseHandler):
     allowed_methods = ('GET', 'PUT')
 
 class DocumentTextHandler(BaseHandler):
     allowed_methods = ('GET', 'PUT')
 
@@ -178,18 +250,53 @@ class DocumentTextHandler(BaseHandler):
                         "provided_revision": orig.revision,
                         "latest_revision": current.revision })
 
                         "provided_revision": orig.revision,
                         "latest_revision": current.revision })
 
-            ndoc = doc.quickwrite('xml', data, msg)
-
-            # return the new revision number
-            return {
-                "document": ndoc.id,
-                "subview": "xml",
-                "previous_revision": prev,
-                "updated_revision": ndoc.revision
-            }
-        
-        except (RevisionNotFound, KeyError):
-            return response.EntityNotFound().django_response()
+            # try to find any Xinclude tags
+            includes = [m.groupdict()['link'] for m in (re.finditer(\
+                XINCLUDE_REGEXP, data, flags=re.UNICODE) or []) ]
+
+            # TODO: provide useful routines to make this simpler
+            def xml_update_action(lib, resolve):
+                try:
+                    f = lib._fileopen(resolve('parts'), 'r')
+                    stored_includes = json.loads(f.read())
+                    f.close()
+                except:
+                    stored_includes = []
+                
+                if stored_includes != includes:
+                    f = lib._fileopen(resolve('parts'), 'w+')
+                    f.write(json.dumps(includes))
+                    f.close()
+
+                    lib._fileadd(resolve('parts'))
+
+                    # update the parts cache
+                    PartCache.update_cache(docid, current.owner,\
+                        stored_includes, includes)
+
+                # now that the parts are ok, write xml
+                f = lib._fileopen(resolve('xml'), 'w+')
+                f.write(data.encode('utf-8'))
+                f.close()
+
+            ndoc = None
+            ndoc = current.invoke_and_commit(\
+                xml_update_action, lambda d: (msg, current.owner) )
+
+            try:
+                # return the new revision number
+                return response.SuccessAllOk().django_response({
+                    "document": ndoc.id,
+                    "subview": "xml",
+                    "previous_revision": current.revision,
+                    "updated_revision": ndoc.revision,
+                    "url": reverse("doctext_view", args=[ndoc.id, ndoc.revision])
+                })
+            except Exception, e:
+                if ndoc: lib._rollback()
+                raise e        
+        except RevisionNotFound, e:
+            return response.EntityNotFound().django_response(e)
 
 #
 # Dublin Core handlers
 
 #
 # Dublin Core handlers
@@ -204,9 +311,9 @@ class DocumentDublinCoreHandler(BaseHandler):
         """Read document as raw text"""        
         try:
             if revision == 'latest':
         """Read document as raw text"""        
         try:
             if revision == 'latest':
-                document = lib.document(docid)
+                doc = lib.document(docid)
             else:
             else:
-                document = lib.document_for_rev(revision)
+                doc = lib.document_for_rev(revision)
             
             bookinfo = dcparser.BookInfo.from_string(doc.data('xml'))
             return bookinfo.serialize()
             
             bookinfo = dcparser.BookInfo.from_string(doc.data('xml'))
             return bookinfo.serialize()
@@ -239,26 +346,98 @@ class DocumentDublinCoreHandler(BaseHandler):
                 document.serialize().encode('utf-8'),\
                 message=msg, user=request.user.username)
 
                 document.serialize().encode('utf-8'),\
                 message=msg, user=request.user.username)
 
-            return {
-                "document": ndoc.id,
-                "subview": "xml",
-                "previous_revision": prev,
-                "updated_revision": ndoc.revision
-            }
-        except (RevisionNotFound, KeyError):
+            try:
+                # return the new revision number
+                return {
+                    "document": ndoc.id,
+                    "subview": "dc",
+                    "previous_revision": current.revision,
+                    "updated_revision": ndoc.revision
+                }
+            except Exception, e:
+                lib._rollback()
+                raise e
+        except RevisionNotFound:
             return response.EntityNotFound().django_response()
 
 
             return response.EntityNotFound().django_response()
 
 
+
 class MergeHandler(BaseHandler):
     allowed_methods = ('POST',)
 
 class MergeHandler(BaseHandler):
     allowed_methods = ('POST',)
 
-    @validate_form(forms.MergeRequestForm)
+    @validate_form(forms.MergeRequestForm, 'POST')
     @hglibrary
     def create(self, request, form, docid, lib):
         """Create a new document revision from the information provided by user"""
 
     @hglibrary
     def create(self, request, form, docid, lib):
         """Create a new document revision from the information provided by user"""
 
-        pass
+        target_rev = form.cleaned_data['target_revision']
 
 
-        
-        
-        
+        doc = lib.document(docid)
+        udoc = doc.take(request.user.username)
+
+        if target_rev == 'latest':
+            target_rev = udoc.revision
+
+        if str(udoc.revision) != target_rev:
+            # user think doesn't know he has an old version
+            # of his own branch.
+            
+            # Updating is teorericly ok, but we need would
+            # have to force a refresh. Sharing may be not safe,
+            # 'cause it doesn't always result in update.
+
+            # In other words, we can't lie about the resource's state
+            # So we should just yield and 'out-of-date' conflict
+            # and let the client ask again with updated info.
+
+            # NOTE: this could result in a race condition, when there
+            # are 2 instances of the same user editing the same document.
+            # Instance "A" trying to update, and instance "B" always changing
+            # the document right before "A". The anwser to this problem is
+            # for the "A" to request a merge from 'latest' and then
+            # check the parent revisions in response, if he actually
+            # merge from where he thinks he should. If not, the client SHOULD
+            # update his internal state.
+            return response.EntityConflict().django_response({
+                    "reason": "out-of-date",
+                    "provided": target_rev,
+                    "latest": udoc.revision })
+
+        if not request.user.has_perm('explorer.book.can_share'):
+            # User is not permitted to make a merge, right away
+            # So we instead create a pull request in the database
+            prq = PullRequest(
+                comitter=request.user,
+                document=docid,
+                source_revision = str(udoc.revision),
+                status="N",
+                comment = form.cleaned_data['comment'] or '$AUTO$ Document shared.'
+            )
+
+            prq.save()
+            return response.RequestAccepted().django_response(\
+                ticket_status=prq.status, \
+                ticket_uri=reverse("pullrequest_view", args=[prq.id]) )
+
+        if form.cleaned_data['type'] == 'update':
+            # update is always performed from the file branch
+            # to the user branch
+            success, changed = udoc.update(request.user.username)
+
+        if form.cleaned_data['type'] == 'share':
+            success, changed = udoc.share(form.cleaned_data['comment'])
+
+        if not success:
+            return response.EntityConflict().django_response()
+
+        if not changed:
+            return response.SuccessNoContent().django_response()
+
+        new_udoc = udoc.latest()
+
+        return response.SuccessAllOk().django_response({
+            "name": udoc.id,
+            "parent_user_resivion": udoc.revision,
+            "parent_revision": doc.revision,
+            "revision": udoc.revision,
+        })