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Added multipage document support and document page transformation

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This commit is contained in:
Roberto Rosario
2011-02-14 00:18:16 -04:00
parent 65d1e5b176
commit 06d7e5a46a
21 changed files with 219 additions and 73 deletions
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55
apps/documents/models.py
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@@ -20,6 +20,7 @@ from documents.conf.settings import AVAILABLE_FUNCTIONS
from documents.conf.settings import AVAILABLE_MODELS
from documents.conf.settings import CHECKSUM_FUNCTION
from documents.conf.settings import UUID_FUNCTION
from documents.conf.settings import PAGE_COUNT_FUNCTION
from documents.conf.settings import STORAGE_BACKEND
from documents.conf.settings import STORAGE_DIRECTORY_NAME
from documents.conf.settings import FILESYSTEM_FILESERVING_ENABLE
@@ -73,12 +74,15 @@ class Document(models.Model):
verbose_name = _(u'document')
verbose_name_plural = _(u'documents')
ordering = ['-date_added']
def __unicode__(self):
return '%s.%s' % (self.file_filename, self.file_extension)
def get_fullname(self):
return os.extsep.join([self.file_filename, self.file_extension])
def update_mimetype(self):
try:
@@ -94,19 +98,45 @@ class Document(models.Model):
def read(self, count=1024):
return self.file.storage.open(self.file.url).read(count)
@models.permalink
def get_absolute_url(self):
return ('document_view', [self.id])
def update_checksum(self, save=True):
if self.exists():
self.checksum = unicode(CHECKSUM_FUNCTION(self.file.read()))
if save:
self.save()
def update_page_count(self):
total_pages = PAGE_COUNT_FUNCTION(self)
for page_number in range(total_pages):
document_page, created = DocumentPage.objects.get_or_create(
document=self, page_number=page_number+1)
def save_to_file(self, filepath, buffer_size=1024*1024):
storage = self.file.storage.open(self.file.url)
output_descriptor = open(filepath, 'wb')
while 1:
copy_buffer = storage.read()
if copy_buffer:
output_descriptor.write(copy_buffer)
else:
break
#input_descriptor.close()
output_descriptor.close()
return filepath
def exists(self):
return self.file.storage.exists(self.file.url)
def delete(self, *args, **kwargs):
#TODO: Might not execute when done in bulk from a queryset
@@ -114,6 +144,7 @@ class Document(models.Model):
self.delete_fs_links()
super(Document, self).delete(*args, **kwargs)
def get_metadata_groups(self):
errors = []
metadata_groups = {}
@@ -143,6 +174,7 @@ class Document(models.Model):
document_id_list = DocumentMetadata.objects.filter(query).values_list('document', flat=True)
metadata_groups[group] = Document.objects.filter(Q(id__in=document_id_list) & ~Q(id=self.id)) or []
return metadata_groups, errors
def create_fs_links(self):
if FILESYSTEM_FILESERVING_ENABLE:
@@ -171,6 +203,7 @@ class Document(models.Model):
#This should be a warning not an error
pass
def delete_fs_links(self):
if FILESYSTEM_FILESERVING_ENABLE:
for document_metadata_index in self.documentmetadataindex_set.all():
@@ -209,11 +242,13 @@ class Document(models.Model):
except OSError, exc:
pass
#Remove the directory if it is empty
try:
os.removedirs(path)
except:
pass
def next_available_filename(document, metadata_index, path, filename, extension, suffix=0):
target = filename
@@ -344,10 +379,10 @@ class DocumentPage(models.Model):
document = models.ForeignKey(Document, verbose_name=_(u'document'))
content = models.TextField(blank=True, null=True, verbose_name=_(u'content'))
page_label = models.CharField(max_length=32, blank=True, null=True, verbose_name=_(u'page label'))
page_number = models.PositiveIntegerField(default=0, verbose_name=_(u'page number'))
page_number = models.PositiveIntegerField(default=1, editable=False, verbose_name=_(u'page number'))
def __unicode__(self):
return '%s - %s' % (self.page_number, self.page_label)
return '%s - %s - %s' % (self.document, self.page_number, self.page_label)
class Meta:
verbose_name = _(u'document page')
@@ -377,7 +412,7 @@ INCLUSION_CHOICES = (
(INCLUSION_OR, _(u'or')),
)
OPERATOR_CHOCIES = (
OPERATOR_CHOICES = (
('exact', _(u'is equal')),
('iexact', _(u'is equal (case insensitive)')),
('contains', _(u'contains')),
@@ -399,7 +434,7 @@ class MetadataGroupItem(models.Model):
metadata_group = models.ForeignKey(MetadataGroup, verbose_name=_(u'metadata group'))
inclusion = models.CharField(default=INCLUSION_AND, max_length=16, choices=INCLUSION_CHOICES, help_text=_(u'The inclusion is ignored for the first item.'))
metadata_type = models.ForeignKey(MetadataType, verbose_name=_(u'metadata type'), help_text=_(u'This represents the metadata of all other documents.'))
operator = models.CharField(max_length=16, choices=OPERATOR_CHOCIES)
operator = models.CharField(max_length=16, choices=OPERATOR_CHOICES)
expression = models.CharField(max_length=128,
verbose_name=_(u'expression'), help_text=_(u'This expression will be evaluated against the current seleted document. The document metadata is available as variables of the same name but with the "metadata_" prefix added their name.'))
negated = models.BooleanField(default=False, verbose_name=_(u'negated'), help_text=_(u'Inverts the logic of the operator.'))
@@ -413,8 +448,8 @@ class MetadataGroupItem(models.Model):
verbose_name_plural = _(u'metadata group items')
class DocumentTransformation(models.Model):
document = models.ForeignKey(Document, verbose_name=_(u'document'))
class DocumentPageTransformation(models.Model):
document_page = models.ForeignKey(DocumentPage, verbose_name=_(u'document page'))
order = models.PositiveIntegerField(blank=True, null=True, verbose_name=_(u'order'))
transformation = models.CharField(choices=TRANFORMATION_CHOICES, max_length=128, verbose_name=_(u'transformation'))
arguments = models.TextField(blank=True, null=True, verbose_name=_(u'arguments'), help_text=_(u'Use directories to indentify arguments, example: {\'degrees\':90}'))
@@ -430,10 +465,8 @@ class DocumentTransformation(models.Model):
class Meta:
ordering = ('order',)
verbose_name = _(u'document transformation')
verbose_name_plural = _(u'document transformations')
verbose_name = _(u'document page transformation')
verbose_name_plural = _(u'document page transformations')
register(Document, _(u'document'), ['document_type__name', 'file_mimetype', 'file_filename', 'file_extension', 'documentmetadata__value', 'documentpage__content'])