view sat_frontends/jp/output_template.py @ 2807:0b7ce5daee9b

plugin XEP-0277: blog items data are now entirely serialised before going to bridge: So far, and for historical reasons, blog items data where serialised using a unicode: unicode dict, which was causing trouble for many types of values (timestamps, booleans, lists). This patch changes it by serialising the whole items before going to bridge, and deserialising it when going back. This way, complex data can be used easily in items. This impact psEvent and serItemsData* methods which are renamed transItemsData* because there are not always serialising anymore (a new argument "serialise" allows to specify it). When editing a blog post in jp, metadata are now more easy to manipulate, specially lists like tags.
author Goffi <goffi@goffi.org>
date Sat, 23 Feb 2019 18:59:00 +0100
parents 003b8b4b56a7
children ab2696e34d29
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#! /usr/bin/python
# -*- coding: utf-8 -*-

# jp: a SàT command line tool
# Copyright (C) 2009-2019 Jérôme Poisson (goffi@goffi.org)

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.

# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
"""Standard outputs"""


from sat_frontends.jp.constants import Const as C
from sat.core.i18n import _
from sat.core import log
from sat.tools.common import template
from functools import partial
import logging
import webbrowser
import tempfile
import os.path

__outputs__ = ["Template"]
TEMPLATE = u"template"
OPTIONS = {u"template", u"browser", u"inline-css"}


class Template(object):
    """outputs data using SàT templates"""

    def __init__(self, jp):
        self.host = jp
        jp.register_output(C.OUTPUT_COMPLEX, TEMPLATE, self.render)

    def _front_url_tmp_dir(self, ctx, relative_url, tmp_dir):
        """Get front URL for temporary directory"""
        template_data = ctx[u'template_data']
        return u"file://" + os.path.join(tmp_dir, template_data.theme, relative_url)

    def _do_render(self, template_path, css_inline, **kwargs):
        try:
            return self.renderer.render(template_path, css_inline=css_inline, **kwargs)
        except template.TemplateNotFound:
            self.host.disp(_(u"Can't find requested template: {template_path}")
                .format(template_path=template_path), error=True)
            self.host.quit(C.EXIT_NOT_FOUND)

    def render(self, data):
        """render output data using requested template

        template to render the data can be either command's TEMPLATE or
        template output_option requested by user.
        @param data(dict): data is a dict which map from variable name to use in template
            to the variable itself.
            command's template_data_mapping attribute will be used if it exists to convert
            data to a dict usable by the template.
        """
        # media_dir is needed for the template
        self.host.media_dir = self.host.bridge.getConfig("", "media_dir")
        cmd = self.host.command
        try:
            template_path = cmd.TEMPLATE
        except AttributeError:
            if not "template" in cmd.args.output_opts:
                self.host.disp(_(
                    u"no default template set for this command, you need to specify a "
                    u"template using --oo template=[path/to/template.html]"),
                    error=True,
                )
                self.host.quit(C.EXIT_BAD_ARG)

        options = self.host.parse_output_options()
        self.host.check_output_options(OPTIONS, options)
        try:
            template_path = options["template"]
        except KeyError:
            # template is not specified, we use default one
            pass
        if template_path is None:
            self.host.disp(_(u"Can't parse template, please check its syntax"),
                           error=True)
            self.host.quit(C.EXIT_BAD_ARG)

        try:
            mapping_cb = cmd.template_data_mapping
        except AttributeError:
            kwargs = data
        else:
            kwargs = mapping_cb(data)

        css_inline = u"inline-css" in options

        if "browser" in options:
            template_name = os.path.basename(template_path)
            tmp_dir = tempfile.mkdtemp()
            front_url_filter = partial(self._front_url_tmp_dir, tmp_dir=tmp_dir)
            self.renderer = template.Renderer(
                self.host, front_url_filter=front_url_filter, trusted=True)
            rendered = self._do_render(template_path, css_inline=css_inline, **kwargs)
            self.host.disp(_(
                u"Browser opening requested.\n"
                u"Temporary files are put in the following directory, you'll have to "
                u"delete it yourself once finished viewing: {}").format(tmp_dir))
            tmp_file = os.path.join(tmp_dir, template_name)
            with open(tmp_file, "w") as f:
                f.write(rendered.encode("utf-8"))
            theme, theme_root_path = self.renderer.getThemeAndRoot(template_path)
            if theme is None:
                # we have an absolute path
                webbrowser
            static_dir = os.path.join(theme_root_path, C.TEMPLATE_STATIC_DIR)
            if os.path.exists(static_dir):
                # we have to copy static files in a subdirectory, to avoid file download
                # to be blocked by same origin policy
                import shutil
                shutil.copytree(
                    static_dir, os.path.join(tmp_dir, theme, C.TEMPLATE_STATIC_DIR)
                )
            webbrowser.open(tmp_file)
        else:
            # FIXME: Q&D way to disable template logging
            #        logs are overcomplicated, and need to be reworked
            template_logger = log.getLogger(u"sat.tools.common.template")
            template_logger.log = lambda *args: None

            logging.disable(logging.WARNING)
            self.renderer = template.Renderer(self.host, trusted=True)
            rendered = self._do_render(template_path, css_inline=css_inline, **kwargs)
            self.host.disp(rendered)