diff options
author | lxf <sng@luxagraf.net> | 2022-05-14 16:38:07 -0400 |
---|---|---|
committer | lxf <sng@luxagraf.net> | 2022-05-14 16:38:07 -0400 |
commit | bb3973ffb714c932e9ec6dd6a751228dc71fe1d3 (patch) | |
tree | 6fa32f9392ad2ec32271349b86a4c1388fd6ba95 /app/lib/contact/forms.py |
initial commit
Diffstat (limited to 'app/lib/contact/forms.py')
-rw-r--r-- | app/lib/contact/forms.py | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/app/lib/contact/forms.py b/app/lib/contact/forms.py new file mode 100644 index 0000000..cf905ac --- /dev/null +++ b/app/lib/contact/forms.py @@ -0,0 +1,145 @@ +""" +A base contact form for allowing users to send email messages through +a web interface. + +""" + +from typing import Any, Dict, List, Optional + +from django import forms, http +from django.conf import settings +from django.contrib.sites.shortcuts import get_current_site +from django.core.mail import send_mail +from django.template import loader +from django.utils.translation import gettext_lazy as _ + +# Parameters to a form being handled from a live request will actually +# be instances of django.utils.datastructures.MultiValueDict, but this +# is declared as a typing.Dict for a few reasons: +# +# * MultiValueDict is a subclass of dict, so instances of +# MultiValueDict will pass type checks. +# +# * Testing of forms more typically passes in plain dict for the form +# arguments, so supporting it is useful. +# +# * PEP 560, which allows dropping the typing module's aliases and +# subscripting the actual types, was adopted for Python 3.7, but +# currently we support back to Python 3.5. +StringKeyedDict = Dict[str, Any] + + +class ContactForm(forms.Form): + """ + The base contact form class from which all contact form classes + should inherit. + + """ + + name = forms.CharField(max_length=100, label=_("Your name")) + email = forms.EmailField(max_length=200, label=_("Your email address")) + body = forms.CharField(widget=forms.Textarea, label=_("Your message")) + + from_email = settings.DEFAULT_FROM_EMAIL + + recipient_list = [mail_tuple[1] for mail_tuple in settings.MANAGERS] + + subject_template_name = "contact/contact_form_subject.txt" + + template_name = "contact/contact_form.txt" + + def __init__( + self, + data: Optional[StringKeyedDict] = None, + files: Optional[StringKeyedDict] = None, + request: Optional[http.HttpRequest] = None, + recipient_list: Optional[List[str]] = None, + *args, + **kwargs + ): + if request is None: + raise TypeError("Keyword argument 'request' must be supplied") + self.request = request + if recipient_list is not None: + self.recipient_list = recipient_list + super().__init__(data=data, files=files, *args, **kwargs) + + def message(self) -> str: + """ + Render the body of the message to a string. + + """ + template_name = ( + self.template_name() if callable(self.template_name) else self.template_name + ) + return loader.render_to_string( + template_name, self.get_context(), request=self.request + ) + + def subject(self) -> str: + """ + Render the subject of the message to a string. + + """ + template_name = ( + self.subject_template_name() + if callable(self.subject_template_name) + else self.subject_template_name + ) + subject = loader.render_to_string( + template_name, self.get_context(), request=self.request + ) + return "".join(subject.splitlines()) + + def get_context(self) -> StringKeyedDict: + """ + Return the context used to render the templates for the email + subject and body. + + By default, this context includes: + + * All of the validated values in the form, as variables of the + same names as their fields. + + * The current ``Site`` object, as the variable ``site``. + + * Any additional variables added by context processors (this + will be a ``RequestContext``). + + """ + if not self.is_valid(): + raise ValueError("Cannot generate Context from invalid contact form") + return dict(self.cleaned_data, site=get_current_site(self.request)) + + def get_message_dict(self) -> StringKeyedDict: + """ + Generate the various parts of the message and return them in a + dictionary, suitable for passing directly as keyword arguments + to ``django.core.mail.send_mail()``. + + By default, the following values are returned: + + * ``from_email`` + + * ``message`` + + * ``recipient_list`` + + * ``subject`` + + """ + if not self.is_valid(): + raise ValueError("Message cannot be sent from invalid contact form") + message_dict = {} + for message_part in ("from_email", "message", "recipient_list", "subject"): + attr = getattr(self, message_part) + message_dict[message_part] = attr() if callable(attr) else attr + return message_dict + + def save(self, fail_silently: bool = False) -> None: + """ + Build and send the email message. + + """ + send_mail(fail_silently=fail_silently, **self.get_message_dict()) + |