158 lines
5.5 KiB
Python
158 lines
5.5 KiB
Python
from django.http import HttpResponse
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from django.template import Context, loader
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from djangomako.shortcuts import render_to_response, render_to_string
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import json, os, sys
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from django.core.context_processors import csrf
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from django.db import connection
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from django.template import Context
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from django.contrib.auth.models import User
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from auth.models import UserProfile
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from django.shortcuts import redirect
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import StringIO
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import track.views
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from django.http import Http404
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import urllib
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import courseware.modules.capa_module
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import courseware.modules.video_module
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import courseware.modules.vertical_module
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import courseware.modules.html_module
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import courseware.modules.schematic_module
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import courseware.modules.seq_module
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from models import StudentModule
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import urllib
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from django.conf import settings
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import courseware.content_parser as content_parser
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import sys
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from lxml import etree
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import uuid
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## TODO: Add registration mechanism
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modx_modules={'problem':courseware.modules.capa_module.LoncapaModule,
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'video':courseware.modules.video_module.VideoModule,
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'html':courseware.modules.html_module.HtmlModule,
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'vertical':courseware.modules.vertical_module.VerticalModule,
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'sequential':courseware.modules.seq_module.SequentialModule,
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'tab':courseware.modules.seq_module.SequentialModule,
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'schematic':courseware.modules.schematic_module.SchematicModule}
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def object_cache(cache, user, module_type, module_id):
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# We don't look up on user -- all queries include user
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# Additional lookup would require a DB hit the way Django
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# is broken.
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for o in cache:
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if o.module_type == module_type and \
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o.module_id == module_id:
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return o
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return None
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def make_track_function(request):
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def f(event_type, event):
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return track.views.server_track(request, event_type, event, page='x_module')
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return f
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def modx_dispatch(request, module=None, dispatch=None, id=None):
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''' Generic view for extensions. '''
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# Grab the student information for the module from the database
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s = StudentModule.objects.filter(module_type=module,
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student=request.user,
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module_id=id)
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if len(s) == 0:
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print "ls404", module, request.user, id
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raise Http404
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s=s[0]
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dispatch=dispatch.split('?')[0]
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ajax_url = '/modx/'+module+'/'+id+'/'
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id_tag=modx_modules[module].id_attribute
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# Grab the XML corresponding to the request from course.xml
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xml = content_parser.module_xml(content_parser.course_file(request.user), module, id_tag, id)
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# Create the module
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instance=modx_modules[module](xml,
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s.module_id,
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ajax_url=ajax_url,
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state=s.state,
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track_function = make_track_function(request),
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render_function = None)
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# Let the module handle the AJAX
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ajax_return=instance.handle_ajax(dispatch, request.POST)
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# Save the state back to the database
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s.state=instance.get_state()
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if instance.get_score() != None:
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s.grade=instance.get_score()['score']
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s.save()
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# Return whatever the module wanted to return to the client/caller
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return HttpResponse(ajax_return)
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def render_x_module(user, request, xml_module, module_object_preload):
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''' Generic module for extensions. This renders to HTML. '''
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# Check if problem has an instance in DB
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module_type=xml_module.tag
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module_class=modx_modules[module_type]
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module_id=xml_module.get('id') #module_class.id_attribute) or ""
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# Grab state from database
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s = object_cache(module_object_preload,
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user,
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module_type,
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module_id)
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# s = StudentModule.objects.filter(student=request.user,
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# module_id=module_id,
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# module_type = module_type)
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# if len(s) == 0:
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# s=None
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# else:
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# s=s[0]
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if s == None: # If nothing in the database...
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state=None
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else:
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smod = s
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state = smod.state
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# Create a new instance
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ajax_url = '/modx/'+module_type+'/'+module_id+'/'
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instance=module_class(etree.tostring(xml_module),
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module_id,
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ajax_url=ajax_url,
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state=state,
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track_function = make_track_function(request),
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render_function = lambda x: render_module(user, request, x, module_object_preload))
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# If instance wasn't already in the database, create it
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if s == None:
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smod=StudentModule(student=user,
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module_type = module_type,
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module_id=module_id,
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state=instance.get_state())
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smod.save() # This may be optional (at least in the case of no instance in the dB)
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module_object_preload.append(smod)
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# Grab content
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content = {'content':instance.get_html(),
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"destroy_js":instance.get_destroy_js(),
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'init_js':instance.get_init_js(),
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'type':module_type}
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return content
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def render_module(user, request, module, module_object_preload):
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''' Generic dispatch for internal modules. '''
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if module==None :
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return {"content":""}
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return render_x_module(user, request, module, module_object_preload)
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