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1 """ |
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2 A set of request processors that return dictionaries to be merged into a |
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3 template context. Each function takes the request object as its only parameter |
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4 and returns a dictionary to add to the context. |
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5 |
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6 These are referenced from the setting TEMPLATE_CONTEXT_PROCESSORS and used by |
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7 RequestContext. |
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8 """ |
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9 |
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10 from django.conf import settings |
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11 |
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12 def auth(request): |
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13 """ |
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14 Returns context variables required by apps that use Django's authentication |
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15 system. |
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16 |
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17 If there is no 'user' attribute in the request, uses AnonymousUser (from |
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18 django.contrib.auth). |
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19 """ |
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20 if hasattr(request, 'user'): |
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21 user = request.user |
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22 else: |
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23 from django.contrib.auth.models import AnonymousUser |
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24 user = AnonymousUser() |
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25 return { |
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26 'user': user, |
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27 'messages': user.get_and_delete_messages(), |
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28 'perms': PermWrapper(user), |
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29 } |
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30 |
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31 def debug(request): |
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32 "Returns context variables helpful for debugging." |
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33 context_extras = {} |
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34 if settings.DEBUG and request.META.get('REMOTE_ADDR') in settings.INTERNAL_IPS: |
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35 context_extras['debug'] = True |
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36 from django.db import connection |
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37 context_extras['sql_queries'] = connection.queries |
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38 return context_extras |
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39 |
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40 def i18n(request): |
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41 from django.utils import translation |
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42 |
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43 context_extras = {} |
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44 context_extras['LANGUAGES'] = settings.LANGUAGES |
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45 context_extras['LANGUAGE_CODE'] = translation.get_language() |
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46 context_extras['LANGUAGE_BIDI'] = translation.get_language_bidi() |
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47 |
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48 return context_extras |
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49 |
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50 def media(request): |
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51 """ |
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52 Adds media-related context variables to the context. |
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53 |
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54 """ |
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55 return {'MEDIA_URL': settings.MEDIA_URL} |
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56 |
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57 def request(request): |
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58 return {'request': request} |
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59 |
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60 # PermWrapper and PermLookupDict proxy the permissions system into objects that |
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61 # the template system can understand. |
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62 |
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63 class PermLookupDict(object): |
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64 def __init__(self, user, module_name): |
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65 self.user, self.module_name = user, module_name |
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66 |
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67 def __repr__(self): |
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68 return str(self.user.get_all_permissions()) |
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69 |
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70 def __getitem__(self, perm_name): |
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71 return self.user.has_perm("%s.%s" % (self.module_name, perm_name)) |
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72 |
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73 def __nonzero__(self): |
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74 return self.user.has_module_perms(self.module_name) |
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75 |
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76 class PermWrapper(object): |
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77 def __init__(self, user): |
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78 self.user = user |
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79 |
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80 def __getitem__(self, module_name): |
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81 return PermLookupDict(self.user, module_name) |
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82 |
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83 def __iter__(self): |
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84 # I am large, I contain multitudes. |
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85 raise TypeError("PermWrapper is not iterable.") |