192 lines
6.5 KiB
Python
192 lines
6.5 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.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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from models import StudentModule
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import urllib
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from django.conf import settings
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import 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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'schematic':courseware.modules.schematic_module.SchematicModule}
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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"
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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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# 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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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 seq_module(request, module):
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''' Layout module which lays out content in a temporal sequence
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'''
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def j(m):
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# jsonify contents so it can be embedded in a js array
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# We also need to split </script> tags so they don't break
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# mid-string
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if 'init_js' not in m: m['init_js']=""
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if 'type' not in m: m['init_js']=""
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content=json.dumps(m['content'])
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content=content.replace('</script>', '<"+"/script>')
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return {'content':content,
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"destroy_js":m['destroy_js'],
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'init_js':m['init_js'],
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'type':m['type']}
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contents=[(e.get("name"),j(render_module(request, e))) \
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for e in module]
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js=""
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iid=uuid.uuid1().hex
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params={'items':contents,
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'id':"seq"}
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# TODO/BUG: Destroy JavaScript should only be called for the active view
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# This calls it for all the views
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#
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# To fix this, we'd probably want to have some way of assigning unique
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# IDs to sequences.
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destroy_js="".join([e[1]['destroy_js'] for e in contents if 'destroy_js' in e[1]])
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if module.tag == 'sequential':
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return {'init_js':js+render_to_string('seq_module.js',params),
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"destroy_js":destroy_js,
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'content':render_to_string('seq_module.html',params),
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'type':'sequential'}
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if module.tag == 'tab':
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params['id'] = 'tab'
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return {'init_js':js+render_to_string('tab_module.js',params),
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"destroy_js":destroy_js,
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'content':render_to_string('tab_module.html',params),
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'type':'tab'}
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def render_x_module(request, xml_module):
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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(module_class.id_attribute) or "" # TODO: remove or ""
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# Grab state from database
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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: # If nothing in the database...
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state=None
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else:
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smod = s[0]
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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 = render_module,
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meta = request)
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# If instance wasn't already in the database, create it
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if len(s) == 0:
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smod=StudentModule(student=request.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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# 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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smod.save() # This may be optional (at least in the case of no instance in the dB)
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return content
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module_types={'video':render_x_module,
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'html':render_x_module,
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'tab':seq_module,
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'vertical':render_x_module,
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'sequential':seq_module,
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'problem':render_x_module,
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'schematic':render_x_module
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}
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def render_module(request, module):
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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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if str(module.tag) in module_types:
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return module_types[module.tag](request, module)
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print "rm404"
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raise Http404
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