49 lines
1.8 KiB
Python
49 lines
1.8 KiB
Python
"""
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View logic for handling course welcome messages.
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"""
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from django.template.loader import render_to_string
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from courseware.courses import get_course_info_section_module, get_course_with_access
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from opaque_keys.edx.keys import CourseKey
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from openedx.core.djangoapps.plugin_api.views import EdxFragmentView
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from web_fragments.fragment import Fragment
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class WelcomeMessageFragmentView(EdxFragmentView):
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"""
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A fragment that displays a course's welcome message.
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"""
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def render_to_fragment(self, request, course_id=None, **kwargs):
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"""
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Renders the welcome message fragment for the specified course.
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Returns: A fragment, or None if there is no welcome message.
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"""
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course_key = CourseKey.from_string(course_id)
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course = get_course_with_access(request.user, 'load', course_key, check_if_enrolled=True)
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welcome_message_html = self.welcome_message_html(request, course)
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if not welcome_message_html:
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return None
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context = {
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'welcome_message_html': welcome_message_html,
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}
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html = render_to_string('course_experience/welcome-message-fragment.html', context)
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return Fragment(html)
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@classmethod
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def welcome_message_html(cls, request, course):
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"""
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Returns the course's welcome message or None if it doesn't have one.
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"""
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info_module = get_course_info_section_module(request, request.user, course, 'updates')
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if not info_module:
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return None
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# Return the course update with the most recent publish date
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info_block = getattr(info_module, '_xmodule', info_module)
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ordered_updates = info_block.ordered_updates()
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return ordered_updates[0]['content'] if ordered_updates else None
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