author | Todd Larsen <tlarsen@google.com> |
Fri, 29 Aug 2008 02:52:02 +0000 | |
changeset 122 | 95d0d954fe0b |
parent 54 | 03e267d67478 |
child 323 | ff1a9aa48cfd |
permissions | -rw-r--r-- |
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from django.contrib.comments.models import Comment, FreeComment |
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from django.contrib.comments.models import PHOTOS_REQUIRED, PHOTOS_OPTIONAL, RATINGS_REQUIRED, RATINGS_OPTIONAL, IS_PUBLIC |
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from django.contrib.comments.models import MIN_PHOTO_DIMENSION, MAX_PHOTO_DIMENSION |
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from django import template |
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from django.template import loader |
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from django.core.exceptions import ObjectDoesNotExist |
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from django.contrib.contenttypes.models import ContentType |
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from django.utils.encoding import smart_str |
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import re |
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|
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register = template.Library() |
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|
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COMMENT_FORM = 'comments/form.html' |
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FREE_COMMENT_FORM = 'comments/freeform.html' |
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|
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class CommentFormNode(template.Node): |
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def __init__(self, content_type, obj_id_lookup_var, obj_id, free, |
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photos_optional=False, photos_required=False, photo_options='', |
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ratings_optional=False, ratings_required=False, rating_options='', |
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is_public=True): |
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self.content_type = content_type |
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if obj_id_lookup_var is not None: |
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obj_id_lookup_var = template.Variable(obj_id_lookup_var) |
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self.obj_id_lookup_var, self.obj_id, self.free = obj_id_lookup_var, obj_id, free |
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self.photos_optional, self.photos_required = photos_optional, photos_required |
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self.ratings_optional, self.ratings_required = ratings_optional, ratings_required |
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self.photo_options, self.rating_options = photo_options, rating_options |
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self.is_public = is_public |
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|
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def render(self, context): |
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from django.conf import settings |
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from django.utils.text import normalize_newlines |
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import base64 |
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context.push() |
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if self.obj_id_lookup_var is not None: |
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try: |
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self.obj_id = self.obj_id_lookup_var.resolve(context) |
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except template.VariableDoesNotExist: |
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return '' |
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# Validate that this object ID is valid for this content-type. |
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# We only have to do this validation if obj_id_lookup_var is provided, |
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# because do_comment_form() validates hard-coded object IDs. |
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try: |
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self.content_type.get_object_for_this_type(pk=self.obj_id) |
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except ObjectDoesNotExist: |
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context['display_form'] = False |
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else: |
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context['display_form'] = True |
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else: |
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context['display_form'] = True |
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context['target'] = '%s:%s' % (self.content_type.id, self.obj_id) |
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options = [] |
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for var, abbr in (('photos_required', PHOTOS_REQUIRED), |
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('photos_optional', PHOTOS_OPTIONAL), |
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('ratings_required', RATINGS_REQUIRED), |
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('ratings_optional', RATINGS_OPTIONAL), |
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('is_public', IS_PUBLIC)): |
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context[var] = getattr(self, var) |
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if getattr(self, var): |
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options.append(abbr) |
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context['options'] = ','.join(options) |
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if self.free: |
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context['hash'] = Comment.objects.get_security_hash(context['options'], '', '', context['target']) |
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default_form = loader.get_template(FREE_COMMENT_FORM) |
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else: |
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context['photo_options'] = self.photo_options |
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context['rating_options'] = normalize_newlines(base64.encodestring(self.rating_options).strip()) |
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if self.rating_options: |
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context['rating_range'], context['rating_choices'] = Comment.objects.get_rating_options(self.rating_options) |
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context['hash'] = Comment.objects.get_security_hash(context['options'], context['photo_options'], context['rating_options'], context['target']) |
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context['logout_url'] = settings.LOGOUT_URL |
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default_form = loader.get_template(COMMENT_FORM) |
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output = default_form.render(context) |
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context.pop() |
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return output |
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|
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class CommentCountNode(template.Node): |
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def __init__(self, package, module, context_var_name, obj_id, var_name, free): |
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self.package, self.module = package, module |
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if context_var_name is not None: |
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context_var_name = template.Variable(context_var_name) |
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self.context_var_name, self.obj_id = context_var_name, obj_id |
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self.var_name, self.free = var_name, free |
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84 |
|
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def render(self, context): |
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86 |
from django.conf import settings |
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manager = self.free and FreeComment.objects or Comment.objects |
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if self.context_var_name is not None: |
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self.obj_id = self.context_var_name.resolve(context) |
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comment_count = manager.filter(object_id__exact=self.obj_id, |
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content_type__app_label__exact=self.package, |
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content_type__model__exact=self.module, site__id__exact=settings.SITE_ID).count() |
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93 |
context[self.var_name] = comment_count |
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94 |
return '' |
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95 |
|
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96 |
class CommentListNode(template.Node): |
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def __init__(self, package, module, context_var_name, obj_id, var_name, free, ordering, extra_kwargs=None): |
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self.package, self.module = package, module |
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99 |
if context_var_name is not None: |
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100 |
context_var_name = template.Variable(context_var_name) |
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101 |
self.context_var_name, self.obj_id = context_var_name, obj_id |
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102 |
self.var_name, self.free = var_name, free |
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103 |
self.ordering = ordering |
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104 |
self.extra_kwargs = extra_kwargs or {} |
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105 |
|
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106 |
def render(self, context): |
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107 |
from django.conf import settings |
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108 |
get_list_function = self.free and FreeComment.objects.filter or Comment.objects.get_list_with_karma |
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|
109 |
if self.context_var_name is not None: |
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110 |
try: |
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111 |
self.obj_id = self.context_var_name.resolve(context) |
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112 |
except template.VariableDoesNotExist: |
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113 |
return '' |
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114 |
kwargs = { |
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115 |
'object_id__exact': self.obj_id, |
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116 |
'content_type__app_label__exact': self.package, |
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117 |
'content_type__model__exact': self.module, |
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118 |
'site__id__exact': settings.SITE_ID, |
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119 |
} |
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120 |
kwargs.update(self.extra_kwargs) |
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121 |
comment_list = get_list_function(**kwargs).order_by(self.ordering + 'submit_date').select_related() |
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122 |
if not self.free and settings.COMMENTS_BANNED_USERS_GROUP: |
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123 |
comment_list = comment_list.extra(select={'is_hidden': 'user_id IN (SELECT user_id FROM auth_user_groups WHERE group_id = %s)' % settings.COMMENTS_BANNED_USERS_GROUP}) |
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124 |
|
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125 |
if not self.free: |
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126 |
if 'user' in context and context['user'].is_authenticated(): |
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127 |
user_id = context['user'].id |
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128 |
context['user_can_moderate_comments'] = Comment.objects.user_is_moderator(context['user']) |
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129 |
else: |
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130 |
user_id = None |
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131 |
context['user_can_moderate_comments'] = False |
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132 |
# Only display comments by banned users to those users themselves. |
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133 |
if settings.COMMENTS_BANNED_USERS_GROUP: |
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134 |
comment_list = [c for c in comment_list if not c.is_hidden or (user_id == c.user_id)] |
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135 |
|
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136 |
context[self.var_name] = comment_list |
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137 |
return '' |
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138 |
|
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139 |
class DoCommentForm: |
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140 |
""" |
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141 |
Displays a comment form for the given params. |
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142 |
|
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143 |
Syntax:: |
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144 |
|
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145 |
{% comment_form for [pkg].[py_module_name] [context_var_containing_obj_id] with [list of options] %} |
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146 |
|
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147 |
Example usage:: |
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148 |
|
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149 |
{% comment_form for lcom.eventtimes event.id with is_public yes photos_optional thumbs,200,400 ratings_optional scale:1-5|first_option|second_option %} |
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150 |
|
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151 |
``[context_var_containing_obj_id]`` can be a hard-coded integer or a variable containing the ID. |
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152 |
""" |
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153 |
def __init__(self, free): |
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154 |
self.free = free |
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155 |
|
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156 |
def __call__(self, parser, token): |
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157 |
tokens = token.contents.split() |
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158 |
if len(tokens) < 4: |
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159 |
raise template.TemplateSyntaxError, "%r tag requires at least 3 arguments" % tokens[0] |
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160 |
if tokens[1] != 'for': |
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161 |
raise template.TemplateSyntaxError, "Second argument in %r tag must be 'for'" % tokens[0] |
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162 |
try: |
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163 |
package, module = tokens[2].split('.') |
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164 |
except ValueError: # unpack list of wrong size |
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165 |
raise template.TemplateSyntaxError, "Third argument in %r tag must be in the format 'package.module'" % tokens[0] |
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166 |
try: |
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167 |
content_type = ContentType.objects.get(app_label__exact=package, model__exact=module) |
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168 |
except ContentType.DoesNotExist: |
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169 |
raise template.TemplateSyntaxError, "%r tag has invalid content-type '%s.%s'" % (tokens[0], package, module) |
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170 |
obj_id_lookup_var, obj_id = None, None |
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171 |
if tokens[3].isdigit(): |
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172 |
obj_id = tokens[3] |
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173 |
try: # ensure the object ID is valid |
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174 |
content_type.get_object_for_this_type(pk=obj_id) |
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175 |
except ObjectDoesNotExist: |
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|
176 |
raise template.TemplateSyntaxError, "%r tag refers to %s object with ID %s, which doesn't exist" % (tokens[0], content_type.name, obj_id) |
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177 |
else: |
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|
178 |
obj_id_lookup_var = tokens[3] |
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179 |
kwargs = {} |
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|
180 |
if len(tokens) > 4: |
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181 |
if tokens[4] != 'with': |
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|
182 |
raise template.TemplateSyntaxError, "Fourth argument in %r tag must be 'with'" % tokens[0] |
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183 |
for option, args in zip(tokens[5::2], tokens[6::2]): |
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|
184 |
option = smart_str(option) |
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185 |
if option in ('photos_optional', 'photos_required') and not self.free: |
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186 |
# VALIDATION ############################################## |
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|
187 |
option_list = args.split(',') |
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|
188 |
if len(option_list) % 3 != 0: |
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|
189 |
raise template.TemplateSyntaxError, "Incorrect number of comma-separated arguments to %r tag" % tokens[0] |
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|
190 |
for opt in option_list[::3]: |
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|
191 |
if not opt.isalnum(): |
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|
192 |
raise template.TemplateSyntaxError, "Invalid photo directory name in %r tag: '%s'" % (tokens[0], opt) |
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|
193 |
for opt in option_list[1::3] + option_list[2::3]: |
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|
194 |
if not opt.isdigit() or not (MIN_PHOTO_DIMENSION <= int(opt) <= MAX_PHOTO_DIMENSION): |
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195 |
raise template.TemplateSyntaxError, "Invalid photo dimension in %r tag: '%s'. Only values between %s and %s are allowed." % (tokens[0], opt, MIN_PHOTO_DIMENSION, MAX_PHOTO_DIMENSION) |
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196 |
# VALIDATION ENDS ######################################### |
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197 |
kwargs[option] = True |
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198 |
kwargs['photo_options'] = args |
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199 |
elif option in ('ratings_optional', 'ratings_required') and not self.free: |
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200 |
# VALIDATION ############################################## |
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201 |
if 2 < len(args.split('|')) > 9: |
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202 |
raise template.TemplateSyntaxError, "Incorrect number of '%s' options in %r tag. Use between 2 and 8." % (option, tokens[0]) |
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203 |
if re.match('^scale:\d+\-\d+\:$', args.split('|')[0]): |
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204 |
raise template.TemplateSyntaxError, "Invalid 'scale' in %r tag's '%s' options" % (tokens[0], option) |
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205 |
# VALIDATION ENDS ######################################### |
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206 |
kwargs[option] = True |
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207 |
kwargs['rating_options'] = args |
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208 |
elif option in ('is_public'): |
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209 |
kwargs[option] = (args == 'true') |
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210 |
else: |
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|
211 |
raise template.TemplateSyntaxError, "%r tag got invalid parameter '%s'" % (tokens[0], option) |
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212 |
return CommentFormNode(content_type, obj_id_lookup_var, obj_id, self.free, **kwargs) |
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213 |
|
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214 |
class DoCommentCount: |
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215 |
""" |
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216 |
Gets comment count for the given params and populates the template context |
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217 |
with a variable containing that value, whose name is defined by the 'as' |
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218 |
clause. |
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|
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Syntax:: |
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|
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{% get_comment_count for [pkg].[py_module_name] [context_var_containing_obj_id] as [varname] %} |
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|
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Example usage:: |
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|
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{% get_comment_count for lcom.eventtimes event.id as comment_count %} |
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|
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Note: ``[context_var_containing_obj_id]`` can also be a hard-coded integer, like this:: |
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|
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{% get_comment_count for lcom.eventtimes 23 as comment_count %} |
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""" |
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def __init__(self, free): |
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self.free = free |
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|
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def __call__(self, parser, token): |
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tokens = token.contents.split() |
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# Now tokens is a list like this: |
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# ['get_comment_list', 'for', 'lcom.eventtimes', 'event.id', 'as', 'comment_list'] |
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if len(tokens) != 6: |
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raise template.TemplateSyntaxError, "%r tag requires 5 arguments" % tokens[0] |
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if tokens[1] != 'for': |
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raise template.TemplateSyntaxError, "Second argument in %r tag must be 'for'" % tokens[0] |
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try: |
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package, module = tokens[2].split('.') |
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except ValueError: # unpack list of wrong size |
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raise template.TemplateSyntaxError, "Third argument in %r tag must be in the format 'package.module'" % tokens[0] |
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try: |
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content_type = ContentType.objects.get(app_label__exact=package, model__exact=module) |
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except ContentType.DoesNotExist: |
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raise template.TemplateSyntaxError, "%r tag has invalid content-type '%s.%s'" % (tokens[0], package, module) |
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var_name, obj_id = None, None |
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if tokens[3].isdigit(): |
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obj_id = tokens[3] |
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try: # ensure the object ID is valid |
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content_type.get_object_for_this_type(pk=obj_id) |
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except ObjectDoesNotExist: |
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raise template.TemplateSyntaxError, "%r tag refers to %s object with ID %s, which doesn't exist" % (tokens[0], content_type.name, obj_id) |
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else: |
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var_name = tokens[3] |
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if tokens[4] != 'as': |
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raise template.TemplateSyntaxError, "Fourth argument in %r must be 'as'" % tokens[0] |
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return CommentCountNode(package, module, var_name, obj_id, tokens[5], self.free) |
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|
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class DoGetCommentList: |
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""" |
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Gets comments for the given params and populates the template context with a |
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special comment_package variable, whose name is defined by the ``as`` |
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clause. |
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|
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Syntax:: |
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|
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{% get_comment_list for [pkg].[py_module_name] [context_var_containing_obj_id] as [varname] (reversed) %} |
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|
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Example usage:: |
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|
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{% get_comment_list for lcom.eventtimes event.id as comment_list %} |
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|
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Note: ``[context_var_containing_obj_id]`` can also be a hard-coded integer, like this:: |
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|
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{% get_comment_list for lcom.eventtimes 23 as comment_list %} |
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|
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To get a list of comments in reverse order -- that is, most recent first -- |
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pass ``reversed`` as the last param:: |
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284 |
|
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{% get_comment_list for lcom.eventtimes event.id as comment_list reversed %} |
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""" |
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def __init__(self, free): |
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self.free = free |
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289 |
|
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def __call__(self, parser, token): |
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tokens = token.contents.split() |
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# Now tokens is a list like this: |
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# ['get_comment_list', 'for', 'lcom.eventtimes', 'event.id', 'as', 'comment_list'] |
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if not len(tokens) in (6, 7): |
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raise template.TemplateSyntaxError, "%r tag requires 5 or 6 arguments" % tokens[0] |
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if tokens[1] != 'for': |
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raise template.TemplateSyntaxError, "Second argument in %r tag must be 'for'" % tokens[0] |
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try: |
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package, module = tokens[2].split('.') |
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except ValueError: # unpack list of wrong size |
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raise template.TemplateSyntaxError, "Third argument in %r tag must be in the format 'package.module'" % tokens[0] |
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try: |
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content_type = ContentType.objects.get(app_label__exact=package,model__exact=module) |
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except ContentType.DoesNotExist: |
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raise template.TemplateSyntaxError, "%r tag has invalid content-type '%s.%s'" % (tokens[0], package, module) |
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var_name, obj_id = None, None |
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if tokens[3].isdigit(): |
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obj_id = tokens[3] |
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try: # ensure the object ID is valid |
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content_type.get_object_for_this_type(pk=obj_id) |
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except ObjectDoesNotExist: |
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raise template.TemplateSyntaxError, "%r tag refers to %s object with ID %s, which doesn't exist" % (tokens[0], content_type.name, obj_id) |
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else: |
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var_name = tokens[3] |
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if tokens[4] != 'as': |
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raise template.TemplateSyntaxError, "Fourth argument in %r must be 'as'" % tokens[0] |
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if len(tokens) == 7: |
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if tokens[6] != 'reversed': |
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raise template.TemplateSyntaxError, "Final argument in %r must be 'reversed' if given" % tokens[0] |
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ordering = "-" |
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321 |
else: |
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ordering = "" |
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return CommentListNode(package, module, var_name, obj_id, tokens[5], self.free, ordering) |
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324 |
|
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325 |
# registration comments |
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register.tag('get_comment_list', DoGetCommentList(False)) |
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register.tag('comment_form', DoCommentForm(False)) |
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register.tag('get_comment_count', DoCommentCount(False)) |
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329 |
# free comments |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
330 |
register.tag('get_free_comment_list', DoGetCommentList(True)) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
331 |
register.tag('free_comment_form', DoCommentForm(True)) |
03e267d67478
Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
332 |
register.tag('get_free_comment_count', DoCommentCount(True)) |