from django import forms

from iconolab.models import AnnotationRevision

import json

class MultipleTagsField(forms.TypedMultipleChoiceField):

    pass

class AnnotationRevisionForm(forms.ModelForm):

    tags = forms.CharField()

    comment = forms.CharField(widget=forms.Textarea)

    class Meta:

        model = AnnotationRevision

        fields = ('title', 'description', 'fragment')

        widgets = {

            'fragment': forms.HiddenInput(),

            'tags': forms.HiddenInput()

        }

    def tags_json(self):

        if self.instance:

            tags_list = []

            for tag_info in self.instance.tagginginfo_set.all():

                tags_list.append({

                    'tag_input': tag_info.tag.link,

                    'relevancy': tag_info.relevancy,

                    'accuracy': tag_info.accuracy

                })

            return json.dumps(tags_list)

        else:

            return '[]'