Added textcha functionality

Author: ethancarlsson

conference/accounts.py

@@ -1,4 +1,5 @@
 import random
+import re
 
 from django import forms
 from django.conf import settings
@@ -216,6 +217,7 @@ class NewAccountForm(forms.Form):
 
     # Additional captcha field with simple python questions
     # https://github.com/EuroPython/epcon/issues/703
+    # https://github.com/EuroPython/epcon/issues/823
     captcha_question = forms.CharField(widget=forms.HiddenInput)
     captcha_answer = forms.CharField()
 
@@ -242,8 +244,10 @@ def get_random_captcha_question(self):
 
     def clean_captcha_answer(self):
         question = self.cleaned_data['captcha_question']
-        cq = CaptchaQuestion.objects.get(question=question)
-        if cq.answer.strip() != self.cleaned_data['captcha_answer'].strip():
+        answer = self.cleaned_data['captcha_answer'].strip()
+        correct_answers = CaptchaQuestion.objects.get(question=question).answer
+        answer_regx = re.compile(correct_answers, re.IGNORECASE)
+        if not answer_regx.match(answer):
             raise forms.ValidationError("Sorry, that's a wrong answer")
         return self.cleaned_data['captcha_question']
 

conference/migrations/0030_auto_20210507_2047.py

@@ -0,0 +1,18 @@
+# Generated by Django 2.2.19 on 2021-05-07 18:47
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('conference', '0029_talk_availability'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='captchaquestion',
+            name='answer',
+            field=models.CharField(max_length=255, verbose_name='answer (use a regular expression\n                                to capture possible answers e.g.\n                                "(python|the python programming language)"\n                                case is ignored)\n                                '),
+        ),
+    ]

conference/models.py

@@ -1308,7 +1308,12 @@ class NoQuestionsAvailable(Exception):
         pass
 
     question = models.CharField(max_length=255)
-    answer   = models.CharField(max_length=255)
+    answer   = models.CharField(max_length=255,
+                                verbose_name='''answer (use a regular expression
+                                to capture possible answers e.g.
+                                "(python|the python programming language)"
+                                case is ignored)
+                                ''')
     enabled  = models.BooleanField(default=True)
 
     objects = CaptchaQuestionManager()