111 lines
3.5 KiB
Python
111 lines
3.5 KiB
Python
# Copyright 2016 Mycroft AI, Inc.
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#
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# This file is part of Mycroft Core.
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#
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# Mycroft Core is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Mycroft Core is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Mycroft Core. If not, see <http://www.gnu.org/licenses/>.
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import pystache
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import os
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import random
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from mycroft.util import log
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__author__ = 'seanfitz'
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logger = log.getLogger(__name__)
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__doc__ = """
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"""
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class MustacheDialogRenderer(object):
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"""
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A dialog template renderer based on the mustache templating language.
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"""
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def __init__(self):
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self.templates = {}
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def load_template_file(self, template_name, filename):
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"""
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Load a template by file name into the templates cache.
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:param template_name: a unique identifier for a group of templates.
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:param filename: a fully qualified filename of a mustache template.
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:return:
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"""
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with open(filename, 'r') as f:
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for line in f:
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template_text = line.strip()
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if template_name not in self.templates:
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self.templates[template_name] = []
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self.templates[template_name].append(template_text)
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def render(self, template_name, context={}, index=None):
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"""
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Given a template name, pick a template and render it with the provided
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context.
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:param template_name: the name of a template group.
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:param context: dictionary representing values to be rendered
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:param index: optional, the specific index in the collection of
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templates
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:raises NotImplementedError: if no template can be found identified by
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template_name
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:return:
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"""
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if template_name not in self.templates:
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raise NotImplementedError("Template not found: %s" % template_name)
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template_functions = self.templates.get(template_name)
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if index is None:
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index = random.randrange(len(template_functions))
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else:
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index %= len(template_functions)
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return pystache.render(template_functions[index], context)
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class DialogLoader(object):
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"""
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Loads a collection of dialog files into a renderer implementation.
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"""
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def __init__(self, renderer_factory=MustacheDialogRenderer):
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self.__renderer = renderer_factory()
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def load(self, dialog_dir):
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"""
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Load all dialog files within the specified directory.
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:param dialog_dir: directory that contains dialog files
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:return: a loaded instance of a dialog renderer
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"""
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if not os.path.exists(dialog_dir) or not os.path.isdir(dialog_dir):
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logger.warn("No dialog found: " + dialog_dir)
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return self.__renderer
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for f in sorted(
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filter(lambda x: os.path.isfile(
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os.path.join(dialog_dir, x)), os.listdir(dialog_dir))):
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dialog_entry_name = os.path.splitext(f)[0]
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self.__renderer.load_template_file(
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dialog_entry_name, os.path.join(dialog_dir, f))
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return self.__renderer
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