4.21.3

app/app/newsletter_utils.py

@@ -0,0 +1,83 @@
+import os
+
+from jinja2 import Environment, FileSystemLoader
+
+from app.config import ROOT_DIR, URL
+from app.email_utils import send_email
+from app.handler.unsubscribe_encoder import UnsubscribeEncoder, UnsubscribeAction
+from app.log import LOG
+from app.models import NewsletterUser, Alias
+
+
+def send_newsletter_to_user(newsletter, user) -> (bool, str):
+    """Return whether the newsletter is sent successfully and the error if not"""
+    try:
+        templates_dir = os.path.join(ROOT_DIR, "templates", "emails")
+        env = Environment(loader=FileSystemLoader(templates_dir))
+        html_template = env.from_string(newsletter.html)
+        text_template = env.from_string(newsletter.plain_text)
+
+        comm_email, unsubscribe_link, via_email = user.get_communication_email()
+        if not comm_email:
+            return False, f"{user} not subscribed to newsletter"
+
+        comm_alias = Alias.get_by(email=comm_email)
+        comm_alias_id = -1
+        if comm_alias:
+            comm_alias_id = comm_alias.id
+
+        unsubscribe_oneclick = unsubscribe_link
+        if via_email:
+            unsubscribe_oneclick = UnsubscribeEncoder.encode(
+                UnsubscribeAction.DisableAlias, comm_alias_id
+            )
+
+        send_email(
+            comm_alias.email,
+            newsletter.subject,
+            text_template.render(
+                user=user,
+                URL=URL,
+            ),
+            html_template.render(
+                user=user,
+                URL=URL,
+                unsubscribe_oneclick=unsubscribe_oneclick,
+            ),
+            unsubscribe_link=unsubscribe_link,
+            unsubscribe_via_email=via_email,
+        )
+
+        NewsletterUser.create(newsletter_id=newsletter.id, user_id=user.id, commit=True)
+        return True, ""
+    except Exception as err:
+        LOG.w(f"cannot send {newsletter} to {user}", exc_info=True)
+        return False, str(err)
+
+
+def send_newsletter_to_address(newsletter, user, to_address) -> (bool, str):
+    """Return whether the newsletter is sent successfully and the error if not"""
+    try:
+        templates_dir = os.path.join(ROOT_DIR, "templates", "emails")
+        env = Environment(loader=FileSystemLoader(templates_dir))
+        html_template = env.from_string(newsletter.html)
+        text_template = env.from_string(newsletter.plain_text)
+
+        send_email(
+            to_address,
+            newsletter.subject,
+            text_template.render(
+                user=user,
+                URL=URL,
+            ),
+            html_template.render(
+                user=user,
+                URL=URL,
+            ),
+        )
+
+        NewsletterUser.create(newsletter_id=newsletter.id, user_id=user.id, commit=True)
+        return True, ""
+    except Exception as err:
+        LOG.w(f"cannot send {newsletter} to {user}", exc_info=True)
+        return False, str(err)