93 lines
3.5 KiB
Python
93 lines
3.5 KiB
Python
# Copyright The IETF Trust 2014-2020, All Rights Reserved
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# -*- coding: utf-8 -*-
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from __future__ import absolute_import, print_function, unicode_literals
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import json
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import six
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from django.utils.html import escape
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from django import forms
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from django.urls import reverse as urlreverse
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import debug # pyflakes:ignore
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from ietf.ipr.models import IprDisclosureBase
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def select2_id_ipr_title_json(value):
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return json.dumps([{ "id": o.pk, "text": escape("%s <%s>" % (o.title, o.time.date().isoformat())) } for o in value])
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class SearchableIprDisclosuresField(forms.CharField):
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"""Server-based multi-select field for choosing documents using
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select2.js.
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The field uses a comma-separated list of primary keys in a
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CharField element as its API with some extra attributes used by
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the Javascript part."""
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def __init__(self,
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max_entries=None, # max number of selected objs
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model=IprDisclosureBase,
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hint_text="Type in terms to search disclosure title",
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*args, **kwargs):
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kwargs["max_length"] = 1000
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self.max_entries = max_entries
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self.model = model
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super(SearchableIprDisclosuresField, self).__init__(*args, **kwargs)
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self.widget.attrs["class"] = "select2-field form-control"
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self.widget.attrs["data-placeholder"] = hint_text
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if self.max_entries != None:
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self.widget.attrs["data-max-entries"] = self.max_entries
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def parse_select2_value(self, value):
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return [x.strip() for x in value.split(",") if x.strip()]
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def check_pks(self, pks):
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for pk in pks:
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if not pk.isdigit():
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raise forms.ValidationError("Unexpected value: %s" % pk)
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return pks
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def prepare_value(self, value):
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if not value:
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value = ""
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if isinstance(value, six.string_types):
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pks = self.parse_select2_value(value)
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# if the user posted a non integer value we need to remove it
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for key in pks:
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if not key.isdigit():
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pks.remove(key)
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value = self.model.objects.filter(pk__in=pks)
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if isinstance(value, self.model):
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value = [value]
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self.widget.attrs["data-pre"] = select2_id_ipr_title_json(value)
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# doing this in the constructor is difficult because the URL
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# patterns may not have been fully constructed there yet
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self.widget.attrs["data-ajax-url"] = urlreverse('ietf.ipr.views.ajax_search')
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return ",".join(str(e.pk) for e in value)
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def clean(self, value):
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value = super(SearchableIprDisclosuresField, self).clean(value)
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pks = self.check_pks(self.parse_select2_value(value))
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if not all([ key.isdigit() for key in pks ]):
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raise forms.ValidationError('You must enter IPR ID(s) as integers')
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objs = self.model.objects.filter(pk__in=pks)
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found_pks = [str(o.pk) for o in objs]
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failed_pks = [x for x in pks if x not in found_pks]
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if failed_pks:
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raise forms.ValidationError("Could not recognize the following {model_name}s: {pks}. You can only input {model_name}s already registered in the Datatracker.".format(pks=", ".join(failed_pks), model_name=self.model.__name__.lower()))
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if self.max_entries != None and len(objs) > self.max_entries:
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raise forms.ValidationError("You can select at most %s entries only." % self.max_entries)
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return objs
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