add multi-bcc capability to email form

scipost_django/common/forms.py

@@ -4,6 +4,8 @@ __license__ = "AGPL v3"
 
 from django import forms
 from crispy_forms.helper import FormHelper
+from django.core.validators import EmailValidator
+from django.forms import CharField
 
 
 class HTMXInlineCRUDModelForm(forms.ModelForm):
@@ -16,3 +18,14 @@ class HTMXInlineCRUDModelForm(forms.ModelForm):
 class ModelChoiceFieldwithid(forms.ModelChoiceField):
     def label_from_instance(self, obj):
         return "%s (id = %i)" % (super().label_from_instance(obj), obj.id)
+
+
+class MultiEmailValidator(EmailValidator):
+    def __call__(self, mail_str: str):
+        for email in mail_str.split(","):
+            super().__call__(email.strip())
+
+
+# Should not be an Email field because browser validation is unwanted.
+class MultiEmailField(CharField):
+    default_validators = [MultiEmailValidator()]

scipost_django/mails/forms.py

@@ -4,6 +4,8 @@ __license__ = "AGPL v3"
 
 from django import forms
 
+from common.forms import MultiEmailField
+
 from .core import MailEngine
 from .exceptions import ConfigurationError
 from .widgets import SummernoteEditor
@@ -17,7 +19,7 @@ class EmailForm(forms.Form):
 
     subject = forms.CharField(max_length=255, label="Subject*")
     text = forms.CharField(widget=SummernoteEditor, label="Text*")
-    mail_field = forms.EmailField(label="Optional: bcc this email to", required=False)
+    mail_field = MultiEmailField(label="Optional: bcc this email to", required=False)
     prefix = "mail_form"
     extra_config = {}
 
@@ -73,8 +75,8 @@ class EmailForm(forms.Form):
     def save(self):
         self.engine.render_template(self.cleaned_data["text"])
         self.engine.mail_data["subject"] = self.cleaned_data["subject"]
-        if self.cleaned_data["mail_field"]:
-            self.engine.mail_data["bcc"].append(self.cleaned_data["mail_field"])
+        if bcc_mail_str := self.cleaned_data["mail_field"]:
+            self.engine.mail_data["bcc"] += [m.strip() for m in bcc_mail_str.split(",")]
         self.engine.send_mail()
         return self.engine.template_variables["object"]