backend.tracim_backend.lib.core.content.ContentApi.get_last_active() - Code Metrics - tracim/tracim_v2 - Measure and Improve Code Quality continuously with Scrutinizer

ContentApi.get_last_active() F
last analyzed 2018-11-14 14:00 UTC

↳ Parent: backend.tracim_backend.lib.core.content
Complexity

Conditions
Size

Total Lines	66
Code Lines	37
Duplication

Lines	0
Ratio	0 %
Importance

Changes
Metric	Value
eloc	37
dl	0
loc	66
rs	2.4
c	0
b	0
f	0
cc	16
nop	5
How to fix Long Method Complexity

Long Method

Small methods make your code easier to understand, in particular if combined with a good name. Besides, if your method is small, finding a good name is usually much easier.
For example, if you find yourself adding comments to a method's body, this is usually a good sign to extract the commented part to a new method, and use the comment as a starting point when coming up with a good name for this new method.
Commonly applied refactorings include:
If many parameters/temporary variables are present:
- Replace temporary variables with Query
- Introduce parameter object; often combined with preserve whole object
- If the above two are insufficient: Replace method with method object
If you have long conditionals: Decompose Conditional
Otherwise: Extract method
Complexity

Complex classes like backend.tracim_backend.lib.core.content.ContentApi.get_last_active() often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
# -*- coding: utf-8 -*-
import datetime
import os
import re
import traceback
import typing
from contextlib import contextmanager

import sqlalchemy
import transaction
from depot.io.utils import FileIntent
from depot.manager import DepotManager
from preview_generator.exception import UnavailablePreviewType
from preview_generator.exception import UnsupportedMimeType
from preview_generator.manager import PreviewManager
from sqlalchemy import desc
from sqlalchemy import func
from sqlalchemy import or_
from sqlalchemy.orm import Query
from sqlalchemy.orm import aliased
from sqlalchemy.orm import joinedload
from sqlalchemy.orm.attributes import QueryableAttribute
from sqlalchemy.orm.attributes import get_history
from sqlalchemy.orm.exc import NoResultFound
from sqlalchemy.orm.session import Session
from sqlalchemy.sql.elements import and_

from tracim_backend.app_models.contents import content_status_list
from tracim_backend.app_models.contents import content_type_list
from tracim_backend.app_models.contents import FOLDER_TYPE
from tracim_backend.app_models.contents import ContentStatus
from tracim_backend.app_models.contents import ContentType
from tracim_backend.app_models.contents import GlobalStatus
from tracim_backend.exceptions import ContentInNotEditableState
from tracim_backend.exceptions import ContentFilenameAlreadyUsedInFolder
from tracim_backend.exceptions import ContentNotFound
from tracim_backend.exceptions import ContentTypeNotExist
from tracim_backend.exceptions import EmptyCommentContentNotAllowed
from tracim_backend.exceptions import EmptyLabelNotAllowed
from tracim_backend.exceptions import PageOfPreviewNotFound
from tracim_backend.exceptions import PreviewDimNotAllowed
from tracim_backend.exceptions import RevisionDoesNotMatchThisContent
from tracim_backend.exceptions import SameValueError
from tracim_backend.exceptions import TracimUnavailablePreviewType
from tracim_backend.exceptions import UnallowedSubContent
from tracim_backend.exceptions import UnavailablePreview
from tracim_backend.exceptions import WorkspacesDoNotMatch
from tracim_backend.lib.core.notifications import NotifierFactory
from tracim_backend.lib.utils.logger import logger
from tracim_backend.lib.utils.translation import DEFAULT_FALLBACK_LANG
from tracim_backend.lib.utils.translation import Translator
from tracim_backend.lib.utils.utils import cmp_to_key
from tracim_backend.lib.utils.utils import current_date_for_filename
from tracim_backend.lib.utils.utils import preview_manager_page_format
from tracim_backend.models.auth import User
from tracim_backend.models.context_models import ContentInContext
from tracim_backend.models.context_models import PreviewAllowedDim
from tracim_backend.models.context_models import RevisionInContext
from tracim_backend.models.data import ActionDescription
from tracim_backend.models.data import Content
from tracim_backend.models.data import ContentRevisionRO
from tracim_backend.models.data import NodeTreeItem
from tracim_backend.models.data import RevisionReadStatus
from tracim_backend.models.data import UserRoleInWorkspace
from tracim_backend.models.data import Workspace
from tracim_backend.models.revision_protection import new_revision

__author__ = 'damien'


# TODO - G.M - 2018-07-24 - [Cleanup] Is this method already needed ?
def compare_content_for_sorting_by_type_and_name(
        content1: Content,
        content2: Content
) -> int:
    """
    :param content1:
    :param content2:
    :return:    1 if content1 > content2
                -1 if content1 < content2
                0 if content1 = content2
    """

    if content1.type == content2.type:
        if content1.get_label().lower()>content2.get_label().lower():
            return 1
        elif content1.get_label().lower()<content2.get_label().lower():
            return -1
        return 0
    else:
        # TODO - D.A. - 2014-12-02 - Manage Content Types Dynamically
        content_type_order = [
            content_type_list.Folder.slug,
            content_type_list.Page.slug,
            content_type_list.Thread.slug,
            content_type_list.File.slug,
        ]

        content_1_type_index = content_type_order.index(content1.type)
        content_2_type_index = content_type_order.index(content2.type)
        result = content_1_type_index - content_2_type_index

        if result < 0:
            return -1
        elif result > 0:
            return 1
        else:
            return 0

# TODO - G.M - 2018-07-24 - [Cleanup] Is this method already needed ?
def compare_tree_items_for_sorting_by_type_and_name(
        item1: NodeTreeItem,
        item2: NodeTreeItem
) -> int:
    return compare_content_for_sorting_by_type_and_name(item1.node, item2.node)


class ContentApi(object):

    SEARCH_SEPARATORS = ',| '
    SEARCH_DEFAULT_RESULT_NB = 50

    # DISPLAYABLE_CONTENTS = (
    #     content_type_list.Folder.slug,
    #     content_type_list.File.slug,
    #     content_type_list.Comment.slug,
    #     content_type_list.Thread.slug,
    #     content_type_list.Page.slug,
    #     content_type_list.Page.slugLegacy,
    #     ContentType.MarkdownPage,
    # )

    def __init__(
            self,
            session: Session,
            current_user: typing.Optional[User],
            config,
            show_archived: bool = False,
            show_deleted: bool = False,
            show_temporary: bool = False,
            show_active: bool = True,
            all_content_in_treeview: bool = True,
            force_show_all_types: bool = False,
            disable_user_workspaces_filter: bool = False,
    ) -> None:
        self._session = session
        self._user = current_user
        self._config = config
        self._user_id = current_user.user_id if current_user else None
        self._show_archived = show_archived
        self._show_deleted = show_deleted
        self._show_temporary = show_temporary
        self._show_active = show_active
        self._show_all_type_of_contents_in_treeview = all_content_in_treeview
        self._force_show_all_types = force_show_all_types
        self._disable_user_workspaces_filter = disable_user_workspaces_filter
        self.preview_manager = PreviewManager(self._config.PREVIEW_CACHE_DIR, create_folder=True)  # nopep8
        default_lang = None
        if self._user:
            default_lang = self._user.lang
        if not default_lang:
            default_lang = DEFAULT_FALLBACK_LANG
        self.translator = Translator(app_config=self._config, default_lang=default_lang)  # nopep8

    @contextmanager
    def show(
            self,
            show_archived: bool=False,
            show_deleted: bool=False,
            show_temporary: bool=False,
    ) -> typing.Generator['ContentApi', None, None]:
        """
        Use this method as context manager to update show_archived,
        show_deleted and show_temporary properties during context.
        :param show_archived: show archived contents
        :param show_deleted:  show deleted contents
        :param show_temporary:  show temporary contents
        """
        previous_show_archived = self._show_archived
        previous_show_deleted = self._show_deleted
        previous_show_temporary = self._show_temporary

        try:
            self._show_archived = show_archived
            self._show_deleted = show_deleted
            self._show_temporary = show_temporary
            yield self
        finally:
            self._show_archived = previous_show_archived
            self._show_deleted = previous_show_deleted
            self._show_temporary = previous_show_temporary

    def get_content_in_context(self, content: Content) -> ContentInContext:
        return ContentInContext(content, self._session, self._config, self._user)  # nopep8

    def get_revision_in_context(self, revision: ContentRevisionRO) -> RevisionInContext:  # nopep8
        # TODO - G.M - 2018-06-173 - create revision in context object
        return RevisionInContext(revision, self._session, self._config, self._user) # nopep8
    
    def _get_revision_join(self) -> sqlalchemy.sql.elements.BooleanClauseList:
        """
        Return the Content/ContentRevision query join condition
        :return: Content/ContentRevision query join condition
        """
        return and_(Content.id == ContentRevisionRO.content_id,
                    ContentRevisionRO.revision_id == self._session.query(
                        ContentRevisionRO.revision_id)
                    .filter(ContentRevisionRO.content_id == Content.id)
                    .order_by(ContentRevisionRO.revision_id.desc())
                    .limit(1)
                    .correlate(Content))

    def get_canonical_query(self) -> Query:
        """
        Return the Content/ContentRevision base query who join these table on the last revision.
        :return: Content/ContentRevision Query
        """
        return self._session.query(Content)\
            .join(ContentRevisionRO, self._get_revision_join())

    # TODO - G.M - 2018-07-24 - [Cleanup] Is this method already needed ?
    @classmethod
    def sort_tree_items(
        cls,
        content_list: typing.List[NodeTreeItem],
    )-> typing.List[NodeTreeItem]:
        news = []
        for item in content_list:
            news.append(item)

        content_list.sort(key=cmp_to_key(
            compare_tree_items_for_sorting_by_type_and_name,
        ))

        return content_list

    # TODO - G.M - 2018-07-24 - [Cleanup] Is this method already needed ?
    @classmethod
    def sort_content(
        cls,
        content_list: typing.List[Content],
    ) -> typing.List[Content]:
        content_list.sort(key=cmp_to_key(compare_content_for_sorting_by_type_and_name))
        return content_list

    def __real_base_query(
        self,
        workspace: Workspace = None,
    ) -> Query:
        result = self.get_canonical_query()

        # Exclude non displayable types
        if not self._force_show_all_types:
            result = result.filter(Content.type.in_(content_type_list.query_allowed_types_slugs()))

        if workspace:
            result = result.filter(Content.workspace_id == workspace.workspace_id)

        # Security layer: if user provided, filter
        # with user workspaces privileges
        if self._user and not self._disable_user_workspaces_filter:
            user = self._session.query(User).get(self._user_id)
            # Filter according to user workspaces
            workspace_ids = [r.workspace_id for r in user.roles \
                             if r.role>=UserRoleInWorkspace.READER]
            result = result.filter(or_(
                Content.workspace_id.in_(workspace_ids),
                # And allow access to non workspace document when he is owner
                and_(
                    Content.workspace_id == None,
                    Content.owner_id == self._user_id,
                )
            ))

        return result

    def _base_query(self, workspace: Workspace=None) -> Query:
        result = self.__real_base_query(workspace)

        if not self._show_active:
            result = result.filter(or_(
                Content.is_deleted==True,
                Content.is_archived==True,
            ))
        if not self._show_deleted:
            result = result.filter(Content.is_deleted==False)

        if not self._show_archived:
            result = result.filter(Content.is_archived==False)

        if not self._show_temporary:
            result = result.filter(Content.is_temporary==False)

        return result

    def __revisions_real_base_query(
        self,
        workspace: Workspace=None,
    ) -> Query:
        result = self._session.query(ContentRevisionRO)

        # Exclude non displayable types
        if not self._force_show_all_types:
            result = result.filter(Content.type.in_(self.DISPLAYABLE_CONTENTS))

        if workspace:
            result = result.filter(ContentRevisionRO.workspace_id==workspace.workspace_id)

        if self._user:
            user = self._session.query(User).get(self._user_id)
            # Filter according to user workspaces
            workspace_ids = [r.workspace_id for r in user.roles \
                             if r.role>=UserRoleInWorkspace.READER]
            result = result.filter(ContentRevisionRO.workspace_id.in_(workspace_ids))

        return result

    def _revisions_base_query(
        self,
        workspace: Workspace=None,
    ) -> Query:
        result = self.__revisions_real_base_query(workspace)

        if not self._show_deleted:
            result = result.filter(ContentRevisionRO.is_deleted==False)

        if not self._show_archived:
            result = result.filter(ContentRevisionRO.is_archived==False)

        if not self._show_temporary:
            result = result.filter(Content.is_temporary==False)

        return result

    def _hard_filtered_base_query(
        self,
        workspace: Workspace=None,
    ) -> Query:
        """
        If set to True, then filterign on is_deleted and is_archived will also
        filter parent properties. This is required for search() function which
        also search in comments (for example) which may be 'not deleted' while
        the associated content is deleted

        :param hard_filtering:
        :return:
        """
        result = self.__real_base_query(workspace)

        if not self._show_deleted:
            parent = aliased(Content)
            result = result.join(parent, Content.parent).\
                filter(Content.is_deleted==False).\
                filter(parent.is_deleted==False)

        if not self._show_archived:
            parent = aliased(Content)
            result = result.join(parent, Content.parent).\
                filter(Content.is_archived==False).\
                filter(parent.is_archived==False)

        if not self._show_temporary:
            parent = aliased(Content)
            result = result.join(parent, Content.parent). \
                filter(Content.is_temporary == False). \
                filter(parent.is_temporary == False)

        return result

    def get_base_query(
        self,
        workspace: Workspace,
    ) -> Query:
        return self._base_query(workspace)

    # TODO - G.M - 2018-07-17 - [Cleanup] Drop this method if unneeded
    # def get_child_folders(self, parent: Content=None, workspace: Workspace=None, filter_by_allowed_content_types: list=[], removed_item_ids: list=[], allowed_node_types=None) -> typing.List[Content]:
    #     """
    #     This method returns child items (folders or items) for left bar treeview.
    # 
    #     :param parent:
    #     :param workspace:
    #     :param filter_by_allowed_content_types:
    #     :param removed_item_ids:
    #     :param allowed_node_types: This parameter allow to hide folders for which the given type of content is not allowed.
    #            For example, if you want to move a Page from a folder to another, you should show only folders that accept pages
    #     :return:
    #     """
    #     filter_by_allowed_content_types = filter_by_allowed_content_types or []  # FDV
    #     removed_item_ids = removed_item_ids or []  # FDV
    # 
    #     if not allowed_node_types:
    #         allowed_node_types = [content_type_list.Folder.slug]
    #     elif allowed_node_types==content_type_list.Any_SLUG:
    #         allowed_node_types = ContentType.all()
    # 
    #     parent_id = parent.content_id if parent else None
    #     folders = self._base_query(workspace).\
    #         filter(Content.parent_id==parent_id).\
    #         filter(Content.type.in_(allowed_node_types)).\
    #         filter(Content.content_id.notin_(removed_item_ids)).\
    #         all()
    # 
    #     if not filter_by_allowed_content_types or \
    #                     len(filter_by_allowed_content_types)<=0:
    #         # Standard case for the left treeview: we want to show all contents
    #         # in the left treeview... so we still filter because for example
    #         # comments must not appear in the treeview
    #         return [folder for folder in folders \
    #                 if folder.type in ContentType.allowed_types_for_folding()]
    # 
    #     # Now this is a case of Folders only (used for moving content)
    #     # When moving a content, you must get only folders that allow to be filled
    #     # with the type of content you want to move
    #     result = []
    #     for folder in folders:
    #         for allowed_content_type in filter_by_allowed_content_types:
    # 
    #             is_folder = folder.type == content_type_list.Folder.slug
    #             content_type__allowed = folder.properties['allowed_content'][allowed_content_type] == True
    # 
    #             if is_folder and content_type__allowed:
    #                 result.append(folder)
    #                 break
    # 
    #     return result

    def _is_filename_available(
            self,
            filename: str,
            workspace: Workspace,
            parent: Content = None,
            exclude_content_id: int = None,
    ) -> bool:
        """
        Check if content label is free
        :param filename: content label
        :param workspace: workspace of the content
        :param parent: parent of the content
        :param exclude_content_id: exclude a specific content_id (useful
        to verify  other content for content update)
        :return: True if content label is available
        """
        # INFO - G.M - 2018-09-04 - Method should not be used by special content
        # with empty filename like comment.
        assert filename
        assert workspace
        label, file_extension = os.path.splitext(filename)
        query = self.get_base_query(workspace)

        if parent:
            query = query.filter(Content.parent_id == parent.content_id)
        else:
            query = query.filter(Content.parent_id == None)

        if exclude_content_id:
            query = query.filter(Content.content_id != exclude_content_id)
        query = query.filter(Content.workspace_id == workspace.workspace_id)


        nb_content_with_the_filename = query.filter(
            Content.file_name == filename
        ).count()
        if nb_content_with_the_filename == 0:
            return True
        elif nb_content_with_the_filename == 1:
            return False
        else:
            critical_error_text = 'Something is wrong in the database ! '\
                                  'Content filename should be unique ' \
                                  'in a same folder in database' \
                                  'but you have {nb} content with ' \
                                  'filename {filename} ' \
                                  'in workspace {workspace_id}'

            critical_error_text = critical_error_text.format(
                nb=nb_content_with_the_filename,
                filename=filename,
                workspace_id=workspace.workspace_id,
            )
            if parent:
                critical_error_text = '{text} and parent as content {parent_id}'.format(  # nopep8
                    text=critical_error_text,
                    parent_id=parent.parent_id
                )
            logger.critical(self, critical_error_text)
            return False

    def _prepare_filename(
            self,
            label: str,
            file_extension: str,
    ) -> str:
        """
        generate correct file_name from label and file_extension
        :return: valid
        """
        # TODO - G.M - 2018-10-11 - Find a way to
        # Refactor this in order to use same method
        # in both contentLib and .file_name of content
        return '{label}{file_extension}'.format(
            label=label,
            file_extension=file_extension
        )

    def _is_filename_available_or_raise(
        self,
        filename: str,
        workspace: Workspace,
        parent: Content = None,
        exclude_content_id: int = None,
    ) -> bool:
        """
        Same as _is_filename_available but raise exception instead of
        returning boolean if content filename is already used
        """
        if self._is_filename_available(
            filename,
            workspace,
            parent,
            exclude_content_id
        ):
            return True
        # INFO - G.M - 2018-10-11 - prepare exception message
        exception_message = 'A Content already exist with the same filename ' \
            '{filename}  in workspace {workspace_id}'
        exception_message = exception_message.format(
            filename=filename,
            workspace_id=workspace.workspace_id,
        )
        if parent:
            exception_message = '{text} and parent as content {parent_id}'.format(
                text=exception_message,
                parent_id=parent.parent_id
            )
        raise ContentFilenameAlreadyUsedInFolder(exception_message)

    def create(self, content_type_slug: str, workspace: Workspace, parent: Content=None, label: str = '', filename: str = '', do_save=False, is_temporary: bool=False, do_notify=True) -> Content:
        # TODO - G.M - 2018-07-16 - raise Exception instead of assert
        assert content_type_slug != content_type_list.Any_SLUG
        assert not (label and filename)

        if content_type_slug == FOLDER_TYPE and not label:
            label = self.generate_folder_label(workspace, parent)

        # TODO BS 2018-08-13: Despite that workspace is required, create_comment
        # can call here with None. Must update create_comment tu require the
        # workspace.
        if not workspace:
            workspace = parent.workspace

        content_type = content_type_list.get_one_by_slug(content_type_slug)
        if parent and parent.properties and 'allowed_content' in parent.properties:
            if content_type.slug not in parent.properties['allowed_content'] or not parent.properties['allowed_content'][content_type.slug]:
                raise UnallowedSubContent(' SubContent of type {subcontent_type}  not allowed in content {content_id}'.format(  # nopep8
                    subcontent_type=content_type.slug,
                    content_id=parent.content_id,
                ))
        if not workspace and parent:
            workspace = parent.workspace

        if workspace:
            if content_type.slug not in workspace.get_allowed_content_types():
                raise UnallowedSubContent(
                    ' SubContent of type {subcontent_type}  not allowed in workspace {content_id}'.format(  # nopep8
                        subcontent_type=content_type.slug,
                        content_id=workspace.workspace_id,
                    )
                )
        content = Content()
        if label:
            file_extension = ''
            if content_type.file_extension:
                file_extension = content_type.file_extension
            filename = self._prepare_filename(label, file_extension)
            self._is_filename_available_or_raise(
                filename,
                workspace,
                parent,
            )
            # TODO - G.M - 2018-10-15 - Set file extension and label
            # explicitly instead of filename in order to have correct
            # label/file-extension separation.
            content.label = label
            content.file_extension = file_extension
        elif filename:
            self._is_filename_available_or_raise(
                filename,
                workspace,
                parent
            )
            # INFO - G.M - 2018-07-04 - File_name setting automatically
            # set label and file_extension
            content.file_name = filename
        else:
            if content_type_slug == content_type_list.Comment.slug:
                # INFO - G.M - 2018-07-16 - Default label for comments is
                # empty string.
                content.label = ''
            else:
                raise EmptyLabelNotAllowed(
                    'Content of type {} should have a valid label'.format(content_type_slug)  # nopep8
                )

        content.owner = self._user
        content.parent = parent

        content.workspace = workspace
        content.type = content_type.slug
        content.is_temporary = is_temporary
        content.revision_type = ActionDescription.CREATION

        if do_save:
            self._session.add(content)
            self.save(content, ActionDescription.CREATION, do_notify=do_notify)
        return content

    def create_comment(self, workspace: Workspace=None, parent: Content=None, content:str ='', do_save=False, do_notify=True) -> Content:
        # TODO: check parent allowed_type and workspace allowed_ type
        assert parent and parent.type != FOLDER_TYPE
        if not self.is_editable(parent):
            raise ContentInNotEditableState(
                "Can't create comment on content, you need to change his status or state (deleted/archived) before any change."
            )
        if not content:
            raise EmptyCommentContentNotAllowed()

        item = self.create(
            content_type_slug=content_type_list.Comment.slug,
            workspace=workspace,
            parent=parent,
            do_notify=False,
            do_save=False,
            label='',
        )
        item.description = content
        item.revision_type = ActionDescription.COMMENT

        if do_save:
            self.save(item, ActionDescription.COMMENT, do_notify=do_notify)
        return item

    def get_one_from_revision(self, content_id: int, content_type: str, workspace: Workspace=None, revision_id=None) -> Content:
        """
        This method is a hack to convert a node revision item into a node
        :param content_id:
        :param content_type:
        :param workspace:
        :param revision_id:
        :return:
        """

        content = self.get_one(content_id, content_type, workspace)
        revision = self._session.query(ContentRevisionRO).filter(ContentRevisionRO.revision_id==revision_id).one()

        if revision.content_id==content.content_id:
            content.revision_to_serialize = revision.revision_id
        else:
            raise ValueError('Revision not found for given content')

        return content

    def get_one(self, content_id: int, content_type: str, workspace: Workspace=None, parent: Content=None) -> Content:

        if not content_id:
            return None

        base_request = self._base_query(workspace).filter(Content.content_id==content_id)

        if content_type!=content_type_list.Any_SLUG:
            base_request = base_request.filter(Content.type==content_type)

        if parent:
            base_request = base_request.filter(Content.parent_id==parent.content_id)  # nopep8

        try:
            content = base_request.one()
        except NoResultFound as exc:
            # TODO - G.M - 2018-07-16 - Add better support for all different
            # error case who can happened here
            # like content doesn't exist, wrong parent, wrong content_type, wrong workspace,
            # wrong access to this workspace, wrong base filter according
            # to content_status.
            raise ContentNotFound('Content "{}" not found in database'.format(content_id)) from exc  # nopep8
        return content

    def get_one_revision(self, revision_id: int = None, content: Content= None) -> ContentRevisionRO:  # nopep8
        """
        This method allow us to get directly any revision with its id
        :param revision_id: The content's revision's id that we want to return
        :param content: The content related to the revision, if None do not
        check if revision is related to this content.
        :return: An item Content linked with the correct revision
        """
        assert revision_id is not None# DYN_REMOVE

        revision = self._session.query(ContentRevisionRO).filter(ContentRevisionRO.revision_id == revision_id).one()
        if content and revision.content_id != content.content_id:
            raise RevisionDoesNotMatchThisContent(
                'revision {revision_id} is not a revision of content {content_id}'.format(  # nopep8
                    revision_id=revision.revision_id,
                    content_id=content.content_id,
                    )
            )
        return revision

    # INFO - A.P - 2017-07-03 - python file object getter
    # in case of we cook a version of preview manager that allows a pythonic
    # access to files
    # def get_one_revision_file(self, revision_id: int = None):
    #     """
    #     This function allows us to directly get a Python file object from its
    #     revision identifier.
    #     :param revision_id: The revision id of the file we want to return
    #     :return: The corresponding Python file object
    #     """
    #     revision = self.get_one_revision(revision_id)
    #     return DepotManager.get().get(revision.depot_file)

    def get_one_revision_filepath(self, revision_id: int = None) -> str:
        """
        This method allows us to directly get a file path from its revision
        identifier.
        :param revision_id: The revision id of the filepath we want to return
        :return: The corresponding filepath
        """
        revision = self.get_one_revision(revision_id)
        depot = DepotManager.get()
        depot_stored_file = depot.get(revision.depot_file)  # type: StoredFile
        depot_file_path = depot_stored_file._file_path  # type: str
        return depot_file_path

    # TODO - G.M - 2018-09-04 - [Cleanup] Is this method already needed ?
    def get_one_by_label_and_parent(
            self,
            content_label: str,
            content_parent: Content=None,
    ) -> Content:
        """
        This method let us request the database to obtain a Content with its name and parent
        :param content_label: Either the content's label or the content's filename if the label is None
        :param content_parent: The parent's content
        :param workspace: The workspace's content
        :return The corresponding Content
        """
        workspace = content_parent.workspace if content_parent else None
        query = self._base_query(workspace)
        parent_id = content_parent.content_id if content_parent else None
        query = query.filter(Content.parent_id == parent_id)

        file_name, file_extension = os.path.splitext(content_label)

        # TODO - G.M - 2018-09-04 - If this method is needed, it should be
        # rewritten in order to avoid content_type hardcoded code there
        return query.filter(
            or_(
                and_(
                    Content.type == content_type_list.File.slug,
                    Content.label == file_name,
                    Content.file_extension == file_extension,
                ),
                and_(
                    Content.type == content_type_list.Thread.slug,
                    Content.label == file_name,
                ),
                and_(
                    Content.type == content_type_list.Page.slug,
                    Content.label == file_name,
                ),
                and_(
                    Content.type == content_type_list.Folder.slug,
                    Content.label == content_label,
                ),
            )
        ).one()

    # TODO - G.M - 2018-09-04 - [Cleanup] Is this method already needed ?
    def get_one_by_label_and_parent_labels(
            self,
            content_label: str,
            workspace: Workspace,
            content_parent_labels: [str]=None,
    ):
        """
        Return content with it's label, workspace and parents labels (optional)
        :param content_label: label of content (label or file_name)
        :param workspace: workspace containing all of this
        :param content_parent_labels: Ordered list of labels representing path
            of folder (without workspace label).
        E.g.: ['foo', 'bar'] for complete path /Workspace1/foo/bar folder
        :return: Found Content
        """
        query = self._base_query(workspace)
        parent_folder = None

        # Grab content parent folder if parent path given
        if content_parent_labels:
            parent_folder = self.get_folder_with_workspace_path_labels(
                content_parent_labels,
                workspace,
            )

        # Build query for found content by label
        content_query = self.filter_query_for_content_label_as_path(
            query=query,
            content_label_as_file=content_label,
        )

        # Modify query to apply parent folder filter if any
        if parent_folder:
            content_query = content_query.filter(
                Content.parent_id == parent_folder.content_id,
            )
        else:
            content_query = content_query.filter(
                Content.parent_id == None,
            )

        # Filter with workspace
        content_query = content_query.filter(
            Content.workspace_id == workspace.workspace_id,
        )

        # Return the content
        return content_query\
            .order_by(
                Content.revision_id.desc(),
            )\
            .one()

    # TODO - G.M - 2018-07-24 - [Cleanup] Is this method already needed ?
    def get_folder_with_workspace_path_labels(
            self,
            path_labels: [str],
            workspace: Workspace,
    ) -> Content:
        """
        Return a Content folder for given relative path.
        TODO BS 20161124: Not safe if web interface allow folder duplicate names
        :param path_labels: List of labels representing path of folder
        (without workspace label).
        E.g.: ['foo', 'bar'] for complete path /Workspace1/foo/bar folder
        :param workspace: workspace of folders
        :return: Content folder
        """
        query = self._base_query(workspace)
        folder = None

        for label in path_labels:
            # Filter query on label
            folder_query = query \
                .filter(
                Content.type == content_type_list.Folder.slug,
                Content.label == label,
                Content.workspace_id == workspace.workspace_id,
                )

            # Search into parent folder (if already deep)
            if folder:
                folder_query = folder_query\
                    .filter(
                        Content.parent_id == folder.content_id,
                    )
            else:
                folder_query = folder_query \
                    .filter(Content.parent_id == None)

            # Get thirst corresponding folder
            folder = folder_query \
                .order_by(Content.revision_id.desc()) \
                .one()

        return folder

    # TODO - G.M - 2018-09-04 - [Cleanup] Is this method already needed ?
    def filter_query_for_content_label_as_path(
            self,
            query: Query,
            content_label_as_file: str,
            is_case_sensitive: bool = False,
    ) -> Query:
        """
        Apply normalised filters to found Content corresponding as given label.
        :param query: query to modify
        :param content_label_as_file: label in this
        FILE version, use Content.file_name.
        :param is_case_sensitive: Take care about case or not
        :return: modified query
        """
        file_name, file_extension = os.path.splitext(content_label_as_file)

        label_filter = Content.label == content_label_as_file
        file_name_filter = Content.label == file_name
        file_extension_filter = Content.file_extension == file_extension

        if not is_case_sensitive:
            label_filter = func.lower(Content.label) == \
                           func.lower(content_label_as_file)
            file_name_filter = func.lower(Content.label) == \
                               func.lower(file_name)
            file_extension_filter = func.lower(Content.file_extension) == \
                                    func.lower(file_extension)

        # TODO - G.M - 2018-09-04 - If this method is needed, it should be
        # rewritten in order to avoid content_type hardcoded code there
        return query.filter(or_(
            and_(
                Content.type == content_type_list.File.slug,
                file_name_filter,
                file_extension_filter,
            ),
            and_(
                Content.type == content_type_list.Thread.slug,
                file_name_filter,
                file_extension_filter,
            ),
            and_(
                Content.type == content_type_list.Page.slug,
                file_name_filter,
                file_extension_filter,
            ),
            and_(
                Content.type == content_type_list.Folder.slug,
                label_filter,
            ),
        ))

    def get_pdf_preview_path(
        self,
        content_id: int,
        revision_id: int,
        page_number: int,
        file_extension: str,
    ) -> str:
        """
        Get pdf preview of revision of content
        :param content_id: id of content
        :param revision_id: id of content revision
        :param page_number: page number of the preview, useful for multipage
        content
        :param file_extension: file extension of the file
        :return: preview_path as string
        """
        file_path = self.get_one_revision_filepath(revision_id)
        try:
            page_number = preview_manager_page_format(page_number)
            if page_number >= self.preview_manager.get_page_nb(file_path, file_ext=file_extension):  # nopep8
                raise PageOfPreviewNotFound(
                    'page_number {page_number} of content {content_id} does not exist'.format(  # nopep8
                        page_number=page_number,
                        content_id=content_id
                    ),
                )
            pdf_preview_path = self.preview_manager.get_pdf_preview(
                file_path,
                page=page_number,
                file_ext=file_extension,
            )
        except PageOfPreviewNotFound as exc:
            # passthrough as this exception is already supported with
            # specific error code.
            raise exc
        except UnavailablePreviewType as exc:
            raise TracimUnavailablePreviewType() from exc
        except UnsupportedMimeType as exc:
            raise UnavailablePreview(
                'No preview available for content {}, revision {}'.format(content_id, revision_id)  # nopep8
            ) from exc
        except Exception as exc:
            logger.warning(
                self,
                "Unknown Preview_Generator Exception Occured : {}".format(str(exc))
            )
            logger.warning(self, traceback.format_exc())
            raise UnavailablePreview(
                'No preview available for content {}, revision {}'.format(content_id, revision_id)  # nopep8
            ) from exc
        return pdf_preview_path

    def get_full_pdf_preview_path(self, revision_id: int, file_extension: str) -> str:
        """
        Get full(multiple page) pdf preview of revision of content
        :param revision_id: id of revision
                :param file_extension: file extension of the file
        :return: path of the full pdf preview of this revision
        """
        file_path = self.get_one_revision_filepath(revision_id)
        try:
            pdf_preview_path = self.preview_manager.get_pdf_preview(file_path, file_ext=file_extension)  # nopep8
        except UnavailablePreviewType as exc:
            raise TracimUnavailablePreviewType() from exc
        except UnsupportedMimeType as exc:
            raise UnavailablePreview(
                'No preview available for revision {}'.format(revision_id)
            ) from exc
        except Exception as exc:
            logger.warning(
                self,
                "Unknown Preview_Generator Exception Occured : {}".format(str(exc))
            )
            logger.warning(self, traceback.format_exc())
            raise UnavailablePreview(
                'No preview available for revision {}'.format(revision_id)
            ) from exc
        return pdf_preview_path

    def get_jpg_preview_allowed_dim(self) -> PreviewAllowedDim:
        """
        Get jpg preview allowed dimensions and strict bool param.
        """
        return PreviewAllowedDim(
            self._config.PREVIEW_JPG_RESTRICTED_DIMS,
            self._config.PREVIEW_JPG_ALLOWED_DIMS,
        )

    def get_jpg_preview_path(
        self,
        content_id: int,
        revision_id: int,
        page_number: int,
        file_extension: str,
        width: int = None,
        height: int = None,
    ) -> str:
        """
        Get jpg preview of revision of content
        :param content_id: id of content
        :param revision_id: id of content revision
        :param page_number: page number of the preview, useful for multipage
        content
        :param file_extension: file extension of the file
        :param width: width in pixel
        :param height: height in pixel
        :return: preview_path as string
        """
        file_path = self.get_one_revision_filepath(revision_id)
        try:
            page_number = preview_manager_page_format(page_number)
            if page_number >= self.preview_manager.get_page_nb(file_path, file_ext=file_extension):  # nopep8
                raise PageOfPreviewNotFound(
                    'page {page_number} of revision {revision_id} of content {content_id} does not exist'.format(  # nopep8
                        page_number=page_number,
                        revision_id=revision_id,
                        content_id=content_id,
                    ),
                )
            if not width and not height:
                width = self._config.PREVIEW_JPG_ALLOWED_DIMS[0].width
                height = self._config.PREVIEW_JPG_ALLOWED_DIMS[0].height

            allowed_dim = False
            for preview_dim in self._config.PREVIEW_JPG_ALLOWED_DIMS:
                if width == preview_dim.width and height == preview_dim.height:
                    allowed_dim = True
                    break

            if not allowed_dim and self._config.PREVIEW_JPG_RESTRICTED_DIMS:
                raise PreviewDimNotAllowed(
                    'Size {width}x{height} is not allowed for jpeg preview'.format(
                        width=width,
                        height=height,
                    )
                )
            jpg_preview_path = self.preview_manager.get_jpeg_preview(
                file_path,
                page=page_number,
                width=width,
                height=height,
                file_ext=file_extension,
            )
        except (PreviewDimNotAllowed, PageOfPreviewNotFound) as exc:
            # passthrough as those exceptions are already supported with
            # specific error code.
            raise exc
        except UnsupportedMimeType as exc:
            raise UnavailablePreview(
                'No preview available for content {}, revision {}'.format(content_id, revision_id)  # nopep8
            ) from exc
        except Exception as exc:
            logger.warning(
                self,
                "Unknown Preview_Generator Exception Occured : {}".format(str(exc))
            )
            logger.warning(self, traceback.format_exc())
            raise UnavailablePreview(
                'No preview available for content {}, revision {}'.format(content_id, revision_id)  # nopep8
            ) from exc
        return jpg_preview_path

    def _get_all_query(
        self,
        parent_id: int = None,
        content_type_slug: str = content_type_list.Any_SLUG,
        workspace: Workspace = None,
        label:str = None,
        order_by_properties: typing.Optional[typing.List[typing.Union[str, QueryableAttribute]]] = None,  # nopep8
    ) -> Query:
        """
        Extended filter for better "get all data" query
        :param parent_id: filter by parent_id
        :param content_type_slug: filter by content_type slug
        :param workspace: filter by workspace
        :param order_by_properties: filter by properties can be both string of
        attribute or attribute of Model object from sqlalchemy(preferred way,
        QueryableAttribute object)
        :return: Query object
        """
        order_by_properties = order_by_properties or []  # FDV
        assert parent_id is None or isinstance(parent_id, int)
        assert content_type_slug is not None
        resultset = self._base_query(workspace)

        if content_type_slug != content_type_list.Any_SLUG:
            # INFO - G.M - 2018-07-05 - convert with
            #  content type object to support legacy slug
            content_type_object = content_type_list.get_one_by_slug(content_type_slug)
            all_slug_alias = [content_type_object.slug]
            if content_type_object.slug_alias:
                all_slug_alias.extend(content_type_object.slug_alias)
            resultset = resultset.filter(Content.type.in_(all_slug_alias))

        if parent_id:
            resultset = resultset.filter(Content.parent_id==parent_id)
        if parent_id == 0 or parent_id is False:
            resultset = resultset.filter(Content.parent_id == None)
        if label:
            resultset = resultset.filter(Content.label.ilike('%{}%'.format(label)))  # nopep8

        for _property in order_by_properties:
            resultset = resultset.order_by(_property)

        return resultset

    def get_all(
            self,
            parent_id: int=None,
            content_type: str=content_type_list.Any_SLUG,
            workspace: Workspace=None,
            label: str=None,
            order_by_properties: typing.Optional[typing.List[typing.Union[str, QueryableAttribute]]] = None,  # nopep8
    ) -> typing.List[Content]:
        """
        Return all content using some filters
        :param parent_id: filter by parent_id
        :param content_type: filter by content_type slug
        :param workspace: filter by workspace
        :param order_by_properties: filter by properties can be both string of
        attribute or attribute of Model object from sqlalchemy(preferred way,
        QueryableAttribute object)
        :return: List of contents
        """
        order_by_properties = order_by_properties or []  # FDV
        return self._get_all_query(parent_id, content_type, workspace, label, order_by_properties).all()

    # TODO - G.M - 2018-07-17 - [Cleanup] Drop this method if unneeded
    # def get_children(self, parent_id: int, content_types: list, workspace: Workspace=None) -> typing.List[Content]:
    #     """
    #     Return parent_id childs of given content_types
    #     :param parent_id: parent id
    #     :param content_types: list of types
    #     :param workspace: workspace filter
    #     :return: list of content
    #     """
    #     resultset = self._base_query(workspace)
    #     resultset = resultset.filter(Content.type.in_(content_types))
    #
    #     if parent_id:
    #         resultset = resultset.filter(Content.parent_id==parent_id)
    #     if parent_id is False:
    #         resultset = resultset.filter(Content.parent_id == None)
    #
    #     return resultset.all()

    # TODO - G.M - 2018-07-17 - [Cleanup] Drop this method if unneeded
    # TODO find an other name to filter on is_deleted / is_archived
    def get_all_with_filter(self, parent_id: int=None, content_type: str=content_type_list.Any_SLUG, workspace: Workspace=None) -> typing.List[Content]:
        assert parent_id is None or isinstance(parent_id, int) # DYN_REMOVE
        assert content_type is not None# DYN_REMOVE
        assert isinstance(content_type, str) # DYN_REMOVE

        resultset = self._base_query(workspace)

        if content_type != content_type_list.Any_SLUG:
            resultset = resultset.filter(Content.type==content_type)

        resultset = resultset.filter(Content.is_deleted == self._show_deleted)
        resultset = resultset.filter(Content.is_archived == self._show_archived)
        resultset = resultset.filter(Content.is_temporary == self._show_temporary)

        resultset = resultset.filter(Content.parent_id==parent_id)

        return resultset.all()

    # TODO - G.M - 2018-07-24 - [Cleanup] Is this method already needed ?
    def get_all_without_exception(self, content_type: str, workspace: Workspace=None) -> typing.List[Content]:
        assert content_type is not None# DYN_REMOVE

        resultset = self._base_query(workspace)

        if content_type != content_type_list.Any_SLUG:
            resultset = resultset.filter(Content.type==content_type)

        return resultset.all()

    def get_last_unread(self, parent_id: int, content_type: str,
                        workspace: Workspace=None, limit=10) -> typing.List[Content]:
        assert parent_id is None or isinstance(parent_id, int) # DYN_REMOVE
        assert content_type is not None# DYN_REMOVE
        assert isinstance(content_type, str) # DYN_REMOVE

        read_revision_ids = self._session.query(RevisionReadStatus.revision_id) \
            .filter(RevisionReadStatus.user_id==self._user_id)

        not_read_revisions = self._revisions_base_query(workspace) \
            .filter(~ContentRevisionRO.revision_id.in_(read_revision_ids)) \
            .filter(ContentRevisionRO.workspace_id == Workspace.workspace_id) \
            .filter(Workspace.is_deleted.is_(False)) \
            .subquery()

    # TODO - G.M - 2018-07-17 - [Cleanup] Drop this method if unneeded
    # def get_all_without_exception(self, content_type: str, workspace: Workspace=None) -> typing.List[Content]:
    #     assert content_type is not None# DYN_REMOVE
    #
    #     resultset = self._base_query(workspace)
    #
    #     if content_type != content_type_list.Any_SLUG:
    #         resultset = resultset.filter(Content.type==content_type)
    #
    #     return resultset.all()

    def get_last_active(
            self,
            workspace: Workspace=None,
            limit: typing.Optional[int]=None,
            before_content: typing.Optional[Content]= None,
            content_ids: typing.Optional[typing.List[int]] = None,
    ) -> typing.List[Content]:
        """
        get contents list sorted by last update
        (last modification of content itself or one of this comment)
        :param workspace: Workspace to check
        :param limit: maximum number of elements to return
        :param before_content: last_active content are only those updated
         before this content given.
        :param content_ids: restrict selection to some content ids and
        related Comments
        :return: list of content
        """

        resultset = self._get_all_query(
            workspace=workspace,
        )
        if content_ids:
            resultset = resultset.filter(
                or_(
                    Content.content_id.in_(content_ids),
                    and_(
                        Content.parent_id.in_(content_ids),
                        Content.type == content_type_list.Comment.slug
                    )
                )
            )

        resultset = resultset.order_by(desc(ContentRevisionRO.updated), desc(ContentRevisionRO.revision_id), desc(ContentRevisionRO.content_id))

        active_contents = []
        too_recent_content = []
        before_content_find = False
        for content in resultset:
            related_active_content = None
            if content_type_list.Comment.slug == content.type:
                related_active_content = content.parent
            else:
                related_active_content = content

            # INFO - G.M - 2018-08-10 - re-apply general filters here to avoid
            # issue with comments
            if not self._show_deleted and related_active_content.is_deleted:
                continue
            if not self._show_archived and related_active_content.is_archived:
                continue

            if related_active_content not in active_contents and related_active_content not in too_recent_content:  # nopep8

                if not before_content or before_content_find:
                    active_contents.append(related_active_content)
                else:
                    too_recent_content.append(related_active_content)

                if before_content and related_active_content == before_content:
                    before_content_find = True

            if limit and len(active_contents) >= limit:
                break

        return active_contents

    # TODO - G.M - 2018-07-19 - Find a way to update this method to something
    # usable and efficient for tracim v2 to get content with read/unread status
    # instead of relying on has_new_information_for()
    # def get_last_unread(self, parent_id: typing.Optional[int], content_type: str,
    #                     workspace: Workspace=None, limit=10) -> typing.List[Content]:
    #     assert parent_id is None or isinstance(parent_id, int) # DYN_REMOVE
    #     assert content_type is not None# DYN_REMOVE
    #     assert isinstance(content_type, str) # DYN_REMOVE
    #
    #     read_revision_ids = self._session.query(RevisionReadStatus.revision_id) \
    #         .filter(RevisionReadStatus.user_id==self._user_id)
    #
    #     not_read_revisions = self._revisions_base_query(workspace) \
    #         .filter(~ContentRevisionRO.revision_id.in_(read_revision_ids)) \
    #         .filter(ContentRevisionRO.workspace_id == Workspace.workspace_id) \
    #         .filter(Workspace.is_deleted.is_(False)) \
    #         .subquery()
    #
    #     not_read_content_ids_query = self._session.query(
    #         distinct(not_read_revisions.c.content_id)
    #     )
    #     not_read_content_ids = list(map(
    #         itemgetter(0),
    #         not_read_content_ids_query,
    #     ))
    #
    #     not_read_contents = self._base_query(workspace) \
    #         .filter(Content.content_id.in_(not_read_content_ids)) \
    #         .order_by(desc(Content.updated))
    #
    #     if content_type != content_type_list.Any_SLUG:
    #         not_read_contents = not_read_contents.filter(
    #             Content.type==content_type)
    #     else:
    #         not_read_contents = not_read_contents.filter(
    #             Content.type!=content_type_list.Folder.slug)
    #
    #     if parent_id:
    #         not_read_contents = not_read_contents.filter(
    #             Content.parent_id==parent_id)
    #
    #     result = []
    #     for item in not_read_contents:
    #         new_item = None
    #         if content_type_list.Comment.slug == item.type:
    #             new_item = item.parent
    #         else:
    #             new_item = item
    #
    #         # INFO - D.A. - 2015-05-20
    #         # We do not want to show only one item if the last 10 items are
    #         # comments about one thread for example
    #         if new_item not in result:
    #             result.append(new_item)
    #
    #         if len(result) >= limit:
    #             break
    #
    #     return result

    def _set_allowed_content(self, content: Content, allowed_content_dict: dict) -> None:  # nopep8
        """
        :param content: the given content instance
        :param allowed_content_dict: must be something like this:
            dict(
                folder = True
                thread = True,
                file = False,
                page = True
            )
        :return: nothing
        """
        properties = content.properties.copy()
        properties['allowed_content'] = allowed_content_dict
        content.properties = properties

    def set_allowed_content(self, content: Content, allowed_content_type_slug_list: typing.List[str]) -> None:  # nopep8
        """
        :param content: the given content instance
        :param allowed_content_type_slug_list: list of content_type_slug to
        accept as subcontent.
        :return: nothing
        """
        allowed_content_dict = {}
        for allowed_content_type_slug in allowed_content_type_slug_list:
            if allowed_content_type_slug not in content_type_list.endpoint_allowed_types_slug():
                raise ContentTypeNotExist('Content_type {} does not exist'.format(allowed_content_type_slug))  # nopep8
            allowed_content_dict[allowed_content_type_slug] = True

        self._set_allowed_content(content, allowed_content_dict)

    def restore_content_default_allowed_content(self, content: Content) -> None:
        """
        Return to default allowed_content_types
        :param content: the given content instance
        :return: nothing
        """
        if content._properties and 'allowed_content' in content._properties:
            properties = content.properties.copy()
            del properties['allowed_content']
            content.properties = properties

    def set_status(self, content: Content, new_status: str):
        if new_status in content_status_list.get_all_slugs_values():
            content.status = new_status
            content.revision_type = ActionDescription.STATUS_UPDATE
        else:
            raise ValueError('The given value {} is not allowed'.format(new_status))

    def move(self,
             item: Content,
             new_parent: Content,
             must_stay_in_same_workspace: bool=True,
             new_workspace: Workspace=None,
    ):
        if must_stay_in_same_workspace:
            if new_parent and new_parent.workspace_id != item.workspace_id:
                raise ValueError('the item should stay in the same workspace')

        item.parent = new_parent
        if new_workspace:
            item.workspace = new_workspace
            if new_parent and \
                    new_parent.workspace_id != new_workspace.workspace_id:
                raise WorkspacesDoNotMatch(
                    'new parent workspace and new workspace should be the same.'
                )
        else:
            if new_parent:
                item.workspace = new_parent.workspace

        self._is_filename_available_or_raise(
            item.file_name,
            item.workspace,
            item.parent,
            exclude_content_id=item.content_id
        )
        item.revision_type = ActionDescription.MOVE

    def copy(
        self,
        item: Content,
        new_parent: Content=None,
        new_label: str=None,
        do_save: bool=True,
        do_notify: bool=True,
    ) -> Content:
        """
        Copy nearly all content, revision included. Children not included, see
        "copy_children" for this.
        :param item: Item to copy
        :param new_parent: new parent of the new copied item
        :param new_label: new label of the new copied item
        :param do_notify: notify copy or not
        :return: Newly copied item
        """
        if (not new_parent and not new_label) or (new_parent == item.parent and new_label == item.label):  # nopep8
            # TODO - G.M - 08-03-2018 - Use something else than value error
            raise ValueError("You can't copy file into itself")
        if new_parent:
            workspace = new_parent.workspace
            parent = new_parent
        else:
            workspace = item.workspace
            parent = item.parent
        label = new_label or item.label
        filename = self._prepare_filename(label, item.file_extension)
        self._is_filename_available_or_raise(filename, workspace, parent)
        content = item.copy(parent)
        # INFO - GM - 15-03-2018 - add "copy" revision
        with new_revision(
            session=self._session,
            tm=transaction.manager,
            content=content,
            force_create_new_revision=True
        ) as rev:
            rev.parent = parent
            rev.workspace = workspace
            rev.file_name = filename
            rev.revision_type = ActionDescription.COPY
            rev.properties['origin'] = {
                'content': item.id,
                'revision': item.last_revision.revision_id,
            }
        if do_save:
            self.save(content, ActionDescription.COPY, do_notify=do_notify)
        return content

    def copy_children(self, origin_content: Content, new_content: Content):
        for child in origin_content.children:
            self.copy(child, new_content)

    def move_recursively(self, item: Content,
                         new_parent: Content, new_workspace: Workspace):
        self.move(item, new_parent, False, new_workspace)
        self.save(item, do_notify=False)

        for child in item.children:
            with new_revision(
                session=self._session,
                tm=transaction.manager,
                content=child
            ):
                self.move_recursively(child, item, new_workspace)
        return

    def is_editable(self, item: Content) -> bool:
        return not item.is_readonly \
               and item.is_active \
               and item.get_status().is_editable()

    def update_content(self, item: Content, new_label: str, new_content: str=None) -> Content:
        if not self.is_editable(item):
            raise ContentInNotEditableState("Can't update not editable file, you need to change his status or state (deleted/archived) before any change.")  # nopep8
        if item.label == new_label and item.description == new_content:
            # TODO - G.M - 20-03-2018 - Fix internatization for webdav access.
            # Internatization disabled in libcontent for now.
            raise SameValueError('The content did not changed')
        if not new_label:
            raise EmptyLabelNotAllowed()

        label = new_label or item.label
        filename = self._prepare_filename(label, item.file_extension)
        self._is_filename_available_or_raise(
            filename,
            item.workspace,
            item.parent,
            exclude_content_id=item.content_id
        )

        item.owner = self._user
        item.label = new_label
        item.description = new_content if new_content else item.description # TODO: convert urls into links
        item.revision_type = ActionDescription.EDITION
        return item

    def update_file_data(self, item: Content, new_filename: str, new_mimetype: str, new_content: bytes) -> Content:
        if not self.is_editable(item):
            raise ContentInNotEditableState("Can't update not editable file, you need to change his status or state (deleted/archived) before any change.")  # nopep8
        # FIXME - G.M - 2018-09-25 - Repair and do a better same content check,
        # as pyramid behaviour use buffered object
        # new_content == item.depot_file.file.read() case cannot happened using
        # whenever new_content.read() == item.depot_file.file.read().
        # as this behaviour can create struggle with big file, simple solution
        # using read can be used everytime.
        # if new_mimetype == item.file_mimetype and \
        #         new_content == item.depot_file.file.read():
        #     raise SameValueError('The content did not changed')
        item.owner = self._user
        self._is_filename_available_or_raise(
            new_filename,
            item.workspace,
            item.parent,
            exclude_content_id=item.content_id
        )
        item.file_name = new_filename
        item.file_mimetype = new_mimetype
        item.depot_file = FileIntent(
            new_content,
            new_filename,
            new_mimetype,
        )
        item.revision_type = ActionDescription.REVISION
        return item

    def archive(self, content: Content):
        content.owner = self._user
        content.is_archived = True
        # TODO - G.M - 12-03-2018 - Inspect possible label conflict problem
        # INFO - G.M - 12-03-2018 - Set label name to avoid trouble when
        # un-archiving file.
        label = '{label}-{action}-{date}'.format(
            label=content.label,
            action='archived',
            date=current_date_for_filename()
        )
        filename = self._prepare_filename(label, content.file_extension)
        self._is_filename_available_or_raise(
            filename,
            content.workspace,
            content.parent,
            exclude_content_id=content.content_id
        )
        content.file_name = filename
        content.revision_type = ActionDescription.ARCHIVING

    def unarchive(self, content: Content):
        content.owner = self._user
        content.is_archived = False
        content.revision_type = ActionDescription.UNARCHIVING

    def delete(self, content: Content):
        content.owner = self._user
        content.is_deleted = True
        # TODO - G.M - 12-03-2018 - Inspect possible label conflict problem
        # INFO - G.M - 12-03-2018 - Set label name to avoid trouble when
        # un-deleting file.
        label = '{label}-{action}-{date}'.format(
            label=content.label,
            action='deleted',
            date=current_date_for_filename()
        )
        filename = self._prepare_filename(label, content.file_extension)
        self._is_filename_available_or_raise(
            filename,
            content.workspace,
            content.parent,
            exclude_content_id=content.content_id
        )
        content.file_name = filename
        content.revision_type = ActionDescription.DELETION

    def undelete(self, content: Content):
        content.owner = self._user
        content.is_deleted = False
        content.revision_type = ActionDescription.UNDELETION

    def get_preview_page_nb(self, revision_id: int, file_extension: str) -> typing.Optional[int]:  # nopep8
        file_path = self.get_one_revision_filepath(revision_id)
        try:
            nb_pages = self.preview_manager.get_page_nb(
                file_path,
                file_ext=file_extension
            )
        except UnsupportedMimeType:
            return None
        except Exception as e:
            logger.warning(
                self,
                "Unknown Preview_Generator Exception Occured : {}".format(str(e))
            )
            logger.warning(self, traceback.format_exc())
            return None
        return nb_pages

    def has_pdf_preview(self, revision_id: int, file_extension: str) -> bool:

        file_path = self.get_one_revision_filepath(revision_id)
        try:
            return self.preview_manager.has_pdf_preview(
                file_path,
                file_ext=file_extension
            )
        except UnsupportedMimeType:
            return False
        except Exception as e:
            logger.warning(
                self,
                "Unknown Preview_Generator Exception Occured : {}".format(str(e))
            )
            logger.warning(self, traceback.format_exc())
            return False

    def has_jpeg_preview(self, revision_id: int, file_extension: str) -> bool:

        file_path = self.get_one_revision_filepath(revision_id)
        try:
            return self.preview_manager.has_jpeg_preview(
                file_path,
                file_ext=file_extension
            )
        except UnsupportedMimeType:
            return False
        except Exception as e:
            logger.warning(
                self,
                "Unknown Preview_Generator Exception Occured : {}".format(str(e))
            )
            logger.warning(self, traceback.format_exc())
            return False

    def mark_read__all(
            self,
            read_datetime: datetime=None,
            do_flush: bool=True,
            recursive: bool=True
    ) -> None:
        """
        Read content of all workspace visible for the user.
        :param read_datetime: date of readigin
        :param do_flush: flush database
        :param recursive: mark read subcontent too
        :return: nothing
        """
        return self.mark_read__workspace(None, read_datetime, do_flush, recursive) # nopep8

    def mark_read__workspace(self,
                       workspace : Workspace,
                       read_datetime: datetime=None,
                       do_flush: bool=True,
                       recursive: bool=True
    ) -> None:
        """
        Read content of a workspace visible for the user.
        :param read_datetime: date of readigin
        :param do_flush: flush database
        :param recursive: mark read subcontent too
        :return: nothing
        """
        itemset = self.get_last_active(workspace)
        for item in itemset:
            if item.has_new_information_for(self._user):
                self.mark_read(item, read_datetime, do_flush, recursive)

    def mark_read(
            self,
            content: Content,
            read_datetime: datetime=None,
            do_flush: bool=True,
            recursive: bool=True
    ) -> Content:
        """
        Read content for the user.
        :param read_datetime: date of readigin
        :param do_flush: flush database
        :param recursive: mark read subcontent too
        :return: nothing
        """
        assert self._user
        assert content

        # The algorithm is:
        # 1. define the read datetime
        # 2. update all revisions related to current Content
        # 3. do the same for all child revisions
        #    (ie parent_id is content_id of current content)

        if not read_datetime:
            read_datetime = datetime.datetime.now()

        viewed_revisions = self._session.query(ContentRevisionRO) \
            .filter(ContentRevisionRO.content_id==content.content_id).all()

        for revision in viewed_revisions:
            revision.read_by[self._user] = read_datetime

        if recursive:
            # mark read :
            # - all children
            # - parent stuff (if you mark a comment as read,
            #                 then you have seen the parent)
            # - parent comments
            for child in content.get_valid_children():
                self.mark_read(child, read_datetime=read_datetime,
                               do_flush=False)

            if content_type_list.Comment.slug == content.type:
                self.mark_read(content.parent, read_datetime=read_datetime,
                               do_flush=False, recursive=False)
                for comment in content.parent.get_comments():
                    if comment != content:
                        self.mark_read(comment, read_datetime=read_datetime,
                                       do_flush=False, recursive=False)

        if do_flush:
            self.flush()

        return content

    def mark_unread(self, content: Content, do_flush=True) -> Content:
        assert self._user
        assert content

        revisions = self._session.query(ContentRevisionRO) \
            .filter(ContentRevisionRO.content_id==content.content_id).all()

        for revision in revisions:
            try:
                del revision.read_by[self._user]
            except KeyError:
                pass

        for child in content.get_valid_children():
            self.mark_unread(child, do_flush=False)

        if do_flush:
            self.flush()

        return content

    def flush(self):
        self._session.flush()

    def save(self, content: Content, action_description: str=None, do_flush=True, do_notify=True):
        """
        Save an object, flush the session and set the revision_type property
        :param content:
        :param action_description:
        :return:
        """
        assert action_description is None or action_description in ActionDescription.allowed_values()

        if not action_description:
            # See if the last action has been modified
            if content.revision_type==None or len(get_history(content.revision, 'revision_type'))<=0:
                # The action has not been modified, so we set it to default edition
                action_description = ActionDescription.EDITION

        if action_description:
            content.revision_type = action_description

        if do_flush:
            # INFO - 2015-09-03 - D.A.
            # There are 2 flush because of the use
            # of triggers for content creation
            #
            # (when creating a content, actually this is an insert of a new
            # revision in content_revisions ; so the mark_read operation need
            # to get full real data from database before to be prepared.

            self._session.add(content)
            self._session.flush()

            # TODO - 2015-09-03 - D.A. - Do not use triggers
            # We should create a new ContentRevisionRO object instead of Content
            # This would help managing view/not viewed status
            self.mark_read(content, do_flush=True)

        if do_notify:
            self.do_notify(content)

    def do_notify(self, content: Content):
        """
        Allow to force notification for a given content. By default, it is
        called during the .save() operation
        :param content:
        :return:
        """
        NotifierFactory.create(
            config=self._config,
            current_user=self._user,
            session=self._session,
        ).notify_content_update(content)

    def get_keywords(self, search_string, search_string_separators=None) -> [str]:
        """
        :param search_string: a list of coma-separated keywords
        :return: a list of str (each keyword = 1 entry
        """

        search_string_separators = search_string_separators or ContentApi.SEARCH_SEPARATORS

        keywords = []
        if search_string:
            keywords = [keyword.strip() for keyword in re.split(search_string_separators, search_string)]

        return keywords

    def search(self, keywords: [str]) -> Query:
        """
        :return: a sorted list of Content items
        """

        if len(keywords)<=0:
            return None

        filter_group_label = list(Content.label.ilike('%{}%'.format(keyword)) for keyword in keywords)
        filter_group_desc = list(Content.description.ilike('%{}%'.format(keyword)) for keyword in keywords)
        title_keyworded_items = self._hard_filtered_base_query().\
            filter(or_(*(filter_group_label+filter_group_desc))).\
            options(joinedload('children_revisions')).\
            options(joinedload('parent'))

        return title_keyworded_items

    def get_all_types(self) -> typing.List[ContentType]:
        labels = content_type_list.endpoint_allowed_types_slug()
        content_types = []
        for label in labels:
            content_types.append(content_type_list.get_one_by_slug(label))

        return content_types

    # TODO - G.M - 2018-07-24 - [Cleanup] Is this method already needed ?
    def exclude_unavailable(
        self,
        contents: typing.List[Content],
    ) -> typing.List[Content]:
        """
        Update and return list with content under archived/deleted removed.
        :param contents: List of contents to parse
        """
        for content in contents[:]:
            if self.content_under_deleted(content) or self.content_under_archived(content):
                contents.remove(content)
        return contents

    # TODO - G.M - 2018-07-24 - [Cleanup] Is this method already needed ?
    def content_under_deleted(self, content: Content) -> bool:
        if content.parent:
            if content.parent.is_deleted:
                return True
            if content.parent.parent:
                return self.content_under_deleted(content.parent)
        return False

    # TODO - G.M - 2018-07-24 - [Cleanup] Is this method already needed ?
    def content_under_archived(self, content: Content) -> bool:
        if content.parent:
            if content.parent.is_archived:
                return True
            if content.parent.parent:
                return self.content_under_archived(content.parent)
        return False

    # TODO - G.M - 2018-07-24 - [Cleanup] Is this method already needed ?
    def find_one_by_unique_property(
            self,
            property_name: str,
            property_value: str,
            workspace: Workspace=None,
    ) -> Content:
        """
        Return Content who contains given property.
        Raise sqlalchemy.orm.exc.MultipleResultsFound if more than one Content
        contains this property value.
        :param property_name: Name of property
        :param property_value: Value of property
        :param workspace: Workspace who contains Content
        :return: Found Content
        """
        # TODO - 20160602 - Bastien: Should be JSON type query
        # see https://www.compose.io/articles/using-json-extensions-in-\
        # postgresql-from-python-2/
        query = self._base_query(workspace=workspace).filter(
            Content._properties.like(
                '%"{property_name}": "{property_value}"%'.format(
                    property_name=property_name,
                    property_value=property_value,
                )
            )
        )
        return query.one()

    # TODO - G.M - 2018-07-24 - [Cleanup] Is this method already needed ?
    def generate_folder_label(
            self,
            workspace: Workspace,
            parent: Content=None,
    ) -> str:
        """
        Generate a folder label
        :param workspace: Future folder workspace
        :param parent: Parent of foture folder (can be None)
        :return: Generated folder name
        """
        _ = self.translator.get_translation
        query = self._base_query(workspace=workspace)\
            .filter(Content.label.ilike('{0}%'.format(
                _('New folder'),
            )))
        if parent:
            query = query.filter(Content.parent == parent)

        return _('New folder {0}').format(
            query.count() + 1,
        )

tracim / tracim_v2

ContentApi.get_last_active() F last analyzed 2018-11-14 14:00 UTC

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ContentApi.get_last_active() F
last analyzed 2018-11-14 14:00 UTC
