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Initial commit to support page mapping

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Signed-off-by: Roberto Rosario <roberto.rosario@mayan-edms.com>
This commit is contained in:
Roberto Rosario
2019-10-08 18:45:53 -04:00
parent 653f55f84a
commit 8cf807899a
36 changed files with 914 additions and 180 deletions
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121
mayan/apps/documents/models/document_page_models.py
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@@ -4,14 +4,16 @@ import logging
from furl import furl
from django.contrib.contenttypes.fields import GenericForeignKey
from django.contrib.contenttypes.models import ContentType
from django.db import models
from django.db.models import Max
from django.urls import reverse
from django.utils.encoding import force_text, python_2_unicode_compatible
from django.utils.functional import cached_property
from django.utils.translation import ugettext_lazy as _
from mayan.apps.converter.literals import DEFAULT_ZOOM_LEVEL, DEFAULT_ROTATION
from mayan.apps.converter.models import LayerTransformation
from mayan.apps.converter.transformations import (
BaseTransformation, TransformationResize, TransformationRotate,
@@ -26,25 +28,32 @@ from ..settings import (
setting_zoom_min_level
)
from .document_version_models import DocumentVersion
from .document_models import Document
#from .document_version_page_models import DocumentVersionPage
__all__ = ('DocumentPage', 'DocumentPageResult')
__all__ = ('DocumentPage',)# 'DocumentPageResult')
logger = logging.getLogger(__name__)
@python_2_unicode_compatible
class DocumentPage(models.Model):
"""
Model that describes a document version page
Model that describes a document page
"""
document_version = models.ForeignKey(
on_delete=models.CASCADE, related_name='version_pages', to=DocumentVersion,
verbose_name=_('Document version')
document = models.ForeignKey(
on_delete=models.CASCADE, related_name='pages', to=Document,
verbose_name=_('Document')
)
enabled = models.BooleanField(default=True, verbose_name=_('Enabled'))
page_number = models.PositiveIntegerField(
db_index=True, default=1, editable=False,
verbose_name=_('Page number')
db_index=True, blank=True, null=True, verbose_name=_('Page number')
)
content_type = models.ForeignKey(
on_delete=models.CASCADE, to=ContentType
)
object_id = models.PositiveIntegerField()
content_object = GenericForeignKey(
ct_field='content_type', fk_field='object_id'
)
objects = DocumentPageManager()
@@ -52,6 +61,7 @@ class DocumentPage(models.Model):
class Meta:
ordering = ('page_number',)
unique_together = ('document', 'page_number')
verbose_name = _('Document page')
verbose_name_plural = _('Document pages')
@@ -60,7 +70,7 @@ class DocumentPage(models.Model):
@cached_property
def cache_partition(self):
partition, created = self.document_version.cache.partitions.get_or_create(
partition, created = self.document.cache.partitions.get_or_create(
name=self.uuid
)
return partition
@@ -69,19 +79,19 @@ class DocumentPage(models.Model):
self.cache_partition.delete()
super(DocumentPage, self).delete(*args, **kwargs)
def detect_orientation(self):
with self.document_version.open() as file_object:
converter = get_converter_class()(
file_object=file_object,
mime_type=self.document_version.mimetype
)
return converter.detect_orientation(
page_number=self.page_number
)
#def detect_orientation(self):
# with self.document_version.open() as file_object:
# converter = get_converter_class()(
# file_object=file_object,
# mime_type=self.document_version.mimetype
# )
# return converter.detect_orientation(
# page_number=self.page_number
# )
@property
def document(self):
return self.document_version.document
#@property
#def document(self):
# return self.document_version.document
def generate_image(self, user=None, **kwargs):
transformation_list = self.get_combined_transformation_list(user=user, **kwargs)
@@ -90,7 +100,7 @@ class DocumentPage(models.Model):
# Check is transformed image is available
logger.debug('transformations cache filename: %s', combined_cache_filename)
if not setting_disable_transformed_image_cache.value and self.cache_partition.get_file(filename=combined_cache_filename):
if self.cache_partition.get_file(filename=combined_cache_filename):
logger.debug(
'transformations cache file "%s" found', combined_cache_filename
)
@@ -128,7 +138,8 @@ class DocumentPage(models.Model):
final_url.args = kwargs
final_url.path = reverse(
viewname='rest_api:documentpage-image', kwargs={
'pk': self.document.pk, 'version_pk': self.document_version.pk,
'pk': self.document.pk,
#'version_pk': self.document_version.pk,
'page_pk': self.pk
}
)
@@ -190,12 +201,12 @@ class DocumentPage(models.Model):
return transformation_list
def get_image(self, transformations=None):
cache_filename = 'base_image'
cache_filename = 'document_page'
logger.debug('Page cache filename: %s', cache_filename)
cache_file = self.cache_partition.get_file(filename=cache_filename)
if not setting_disable_base_image_cache.value and cache_file:
if cache_file:
logger.debug('Page cache file "%s" found', cache_filename)
with cache_file.open() as file_object:
@@ -216,7 +227,12 @@ class DocumentPage(models.Model):
logger.debug('Page cache file "%s" not found', cache_filename)
try:
with self.document_version.get_intermediate_file() as file_object:
#with self.document_version.get_intermediate_file() as file_object:
#Render or get cached document version page
self.content_object.get_image()
cache_filename = 'base_image'
cache_file = self.content_object.cache_partition.get_file(filename=cache_filename)
with cache_file.open() as file_object:
converter = get_converter_class()(
file_object=file_object
)
@@ -241,28 +257,39 @@ class DocumentPage(models.Model):
)
raise
def get_label(self):
return _(
'Page %(page_number)d out of %(total_pages)d of %(document)s'
) % {
'document': force_text(self.document),
'page_number': self.page_number,
'total_pages': self.document.pages_all.count()
}
get_label.short_description = _('Label')
@property
def is_in_trash(self):
return self.document.is_in_trash
def get_label(self):
return _(
'Page %(page_num)d out of %(total_pages)d of %(document)s'
) % {
'document': force_text(self.document),
'page_num': self.page_number,
'total_pages': self.document_version.pages_all.count()
}
get_label.short_description = _('Label')
def natural_key(self):
return (self.page_number, self.document_version.natural_key())
natural_key.dependencies = ['documents.DocumentVersion']
return (self.page_number, self.document.natural_key())
natural_key.dependencies = ['documents.Document']
def save(self, *args, **kwargs):
if not self.page_number:
last_page_number = DocumentPage.objects.filter(
document=self.document
).aggregate(Max('page_number'))['page_number__max']
if last_page_number is not None:
self.page_number = last_page_number + 1
else:
self.page_number = 1
super(DocumentPage, self).save(*args, **kwargs)
@property
def siblings(self):
return DocumentPage.objects.filter(
document_version=self.document_version
document=self.document
)
@property
@@ -271,12 +298,12 @@ class DocumentPage(models.Model):
Make cache UUID a mix of version ID and page ID to avoid using stale
images
"""
return '{}-{}'.format(self.document_version.uuid, self.pk)
return '{}-{}'.format(self.document.uuid, self.pk)
class DocumentPageResult(DocumentPage):
class Meta:
ordering = ('document_version__document', 'page_number')
proxy = True
verbose_name = _('Document page')
verbose_name_plural = _('Document pages')
#class DocumentVersionPageResult(DocumentVersionPage):
# class Meta:
# ordering = ('document_version__document', 'page_number')
# proxy = True
# verbose_name = _('Document version page')
# verbose_name_plural = _('Document version pages')