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# Source code for camelot.view.wizard.merge_document

    #  ============================================================================
    #
    #  Copyright (C) 2007-2011 Conceptive Engineering bvba. All rights reserved.
    #  www.conceptive.be / project-camelot@conceptive.be
    #
    #  This file is part of the Camelot Library.
    #
    #  This file may be used under the terms of the GNU General Public
    #  License version 2.0 as published by the Free Software Foundation
    #  and appearing in the file license.txt included in the packaging of
    #  this file.  Please review this information to ensure GNU
    #  General Public Licensing requirements will be met.
    #
    #  If you are unsure which license is appropriate for your use, please
    #  visit www.python-camelot.com or contact project-camelot@conceptive.be
    #
    #  This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    #  WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    #
    #  For use of this library in commercial applications, please contact
    #  project-camelot@conceptive.be
    #
    #  ============================================================================
    '''
    Wizard to merge documents with a list of objects.

    This wizard is triggered thru an entry in the main menu.
    '''

    from PyQt4 import QtGui, QtCore

    import os

    from camelot.core.utils import ugettext_lazy as _
    from camelot.core.utils import variant_to_pyobject
    from camelot.view.art import Icon
    from camelot.view.wizard.pages.progress_page import ProgressPage
    from camelot.view.wizard.pages.select import SelectFilePage

    class SelectTemplatePage(SelectFilePage):
        """Page to select the template to merge"""
        title = _('Merge a template document')
        sub_title = _(
            "Click 'Browse' to select a template file, then click 'Next'."
        )
        icon = Icon('tango/32x32/mimetypes/x-office-document-template.png')

    class MergePage(ProgressPage):
        """Wait until merge is complete"""
        title = _('Merge in progress')

        def __init__(self, parent, selection_getter):
            super(MergePage, self).__init__(parent)
            self._selection_getter = selection_getter

        def run(self):
            from jinja2 import Environment, FileSystemLoader
            import tempfile
            import datetime
            objects = list(self._selection_getter())
            self.update_maximum_signal.emit( len(objects) + 1)
            number_of_digits = len( str( len( objects ) + 1 ) )
            destination_folder = tempfile.mkdtemp()
            template_file_name = variant_to_pyobject( self.field('datasource') )
            file_system_loader = FileSystemLoader( os.path.dirname( template_file_name ) )
            environment = Environment( loader=file_system_loader )
            template = environment.get_template( os.path.basename( template_file_name ) )
            extension = os.path.splitext( template_file_name )[1]
            self.update_progress_signal.emit( 1, 'Opened template' )
            for i, obj in enumerate(objects):
                context = {'obj':obj, 'now':datetime.datetime.now()}
                document = template.render( context )
                index = '%0*i'%(number_of_digits, i+1)
                destination_file = os.path.join( destination_folder,
                                                 'document %s'%index + extension )
                open( destination_file, 'w').write( document.encode('utf-8') )
                self.update_progress_signal.emit( i+1, unicode(obj) )
            url = QtCore.QUrl.fromLocalFile( destination_folder )
            QtGui.QDesktopServices.openUrl( url )

    class MergeDocumentWizard(QtGui.QWizard):
        """This wizard lets the user select a template file, it then
    merges that template will all the selected rows in a table"""

        window_title = _('Merge Document')

        def __init__(self, parent=None, selection_getter=None):
            """:param selection_getter: function to loop over the list of objects
            to merge"""
            super(MergeDocumentWizard, self).__init__(parent)
            self.setWindowTitle( unicode(self.window_title) )
            assert selection_getter
            self.addPage(SelectTemplatePage(parent=self))
            self.addPage(MergePage(parent=self, selection_getter=selection_getter))

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