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from django.utils.safestring import mark_safe

from sphene.sphboard.models import ExtendedCategoryConfig
from sphene.sphboard.views import PostForm
from sphene.sphboard.categorytyperegistry import CategoryType


class DefaultCategoryType(CategoryType):
    """
    the "default" category type which is used if there
    is no 'category type' setting.
    """
    def get_post_form_class(self, replypost, editpost):
        return PostForm


class SeparatorCategoryType(CategoryType):
    """
    category type which is only a separator (ie. a root categry which
    cannot be used for posting, ..)
    """
    name = 'sphseparator'

    label = 'Separator'


    def is_separator(self):
        return True



class ExtendedPostForm(PostForm):
    def __init__(self, *args, **kwargs):
        super(ExtendedPostForm, self).__init__(*args, **kwargs)

    def __set_label( self, string, field ):
        if string:
            field.label = string

    def init_for_category_type(self, category_type, post):
        super(ExtendedPostForm, self).init_for_category_type(category_type, post)
        self.__set_label( category_type.get_subject_label(), 
                          self.fields['subject'] )
        self.__set_label( category_type.get_body_label(),
                          self.fields['body'] )

        initial = category_type.get_body_initial()
        if initial:
            self.fields['body'].initial = initial

        help_text = category_type.get_body_help_text()
        if help_text:
            self.fields['body'].help_text = help_text
        

class ExtendedCategoryType(CategoryType):
    name = "extendedconfig"

    label = "Extended Config"

    def get_subject_label(self):
        return self.get_extended_config().subject_label

    def get_body_label(self):
        return self.get_extended_config().body_label

    def get_body_initial(self):
        return self.get_extended_config().body_initial

    def get_body_help_text(self):
        return self.get_extended_config().body_help_text

    def get_post_new_thread_label(self):
        return self.get_extended_config().post_new_thread_label

    def get_above_thread_list_block(self):
        return mark_safe(self.get_extended_config().above_thread_list_block)

    def get_threadlist_template(self):
        return 'sphene/sphboard/extended_thread_list.html'

    def get_new_thread_link_template(self):
        return 'sphene/sphboard/_extended_new_thread_link.html'

    def get_extended_config(self):
        if hasattr(self, 'extended_config'):
            return self.extended_config
        try:
            config = ExtendedCategoryConfig.objects.get( category = self.category )
        except ExtendedCategoryConfig.DoesNotExist:
            config = ExtendedCategoryConfig(category = self.category)
            config.save()

        # "Cache" result.
        self.extended_config = config
        return config