From b1a0268e6b52b9332b32ffd7dd648613685df6d9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?R=C3=A2u=20Cao?= <raucao@kip.pe>
Date: Wed, 22 Mar 2023 14:53:44 +0700
Subject: [PATCH] Make email settings configurable

---
 .env.example                       | 10 +++++-
 config/environments/development.rb |  6 +++-
 config/environments/production.rb  | 53 ++++++++++++++++++++++--------
 3 files changed, 53 insertions(+), 16 deletions(-)

diff --git a/.env.example b/.env.example
index 5550c06..b667033 100644
--- a/.env.example
+++ b/.env.example
@@ -1,3 +1,12 @@
+SMTP_SERVER=smtp.example.com
+SMTP_PORT=587
+SMTP_LOGIN=accounts
+SMTP_PASSWORD=123abc
+SMTP_FROM_ADDRESS=accounts@example.com
+SMTP_DOMAIN=example.com
+SMTP_AUTH_METHOD=plain
+SMTP_ENABLE_STARTTLS=auto
+
 LDAP_HOST=localhost
 LDAP_PORT=389
 LDAP_ADMIN_PASSWORD=passthebutter
@@ -24,4 +33,3 @@ LNDHUB_PG_PORT=5432
 LNDHUB_PG_DATABASE=lndhub
 LNDHUB_PG_USERNAME=lndhub
 LNDHUB_PG_PASSWORD=''
-
diff --git a/config/environments/development.rb b/config/environments/development.rb
index 80a7540..b7d1659 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -57,10 +57,14 @@ Rails.application.configure do
   # routes, locales, etc. This feature depends on the listen gem.
   config.file_watcher = ActiveSupport::EventedFileUpdateChecker
 
+  config.action_mailer.default_options = {
+    from: "accounts@localhost"
+  }
+
   # Don't actually send emails, cache them for viewing via letter opener
   config.action_mailer.delivery_method = :letter_opener
   # Don't care if the mailer can't send
-  config.action_mailer.raise_delivery_errors = false
+  config.action_mailer.raise_delivery_errors = true
   # Base URL to be used by email template link helpers
   config.action_mailer.default_url_options = { host: "localhost:3000", protocol: "http" }
 
diff --git a/config/environments/production.rb b/config/environments/production.rb
index 27b439c..1f22161 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -57,28 +57,53 @@ Rails.application.configure do
   # config.active_job.queue_adapter     = :resque
   # config.active_job.queue_name_prefix = "akkounts_production"
 
-  config.action_mailer.perform_caching = false
+  # E-mail settings, adapted from https://github.com/mastodon/mastodon
 
-  config.action_mailer.delivery_method = :smtp
+  outgoing_email_address = ENV.fetch('SMTP_FROM_ADDRESS', 'accounts@localhost')
+  outgoing_email_domain  = Mail::Address.new(outgoing_email_address).domain
+
+  config.action_mailer.default_options = {
+    from: outgoing_email_address,
+    message_id: -> { "<#{Mail.random_tag}@#{outgoing_email_domain}>" },
+  }
+
+  config.action_mailer.default_options[:reply_to]    = ENV['SMTP_REPLY_TO'] if ENV['SMTP_REPLY_TO'].present?
+  config.action_mailer.default_options[:return_path] = ENV['SMTP_RETURN_PATH'] if ENV['SMTP_RETURN_PATH'].present?
+
+  enable_starttls = nil
+  enable_starttls_auto = nil
+
+  case ENV['SMTP_ENABLE_STARTTLS']
+  when 'always'
+    enable_starttls = true
+  when 'never'
+    enable_starttls = false
+  when 'auto'
+    enable_starttls_auto = true
+  else
+    enable_starttls_auto = ENV['SMTP_ENABLE_STARTTLS_AUTO'] != 'false'
+  end
 
   config.action_mailer.smtp_settings = {
-    address: "mail.gandi.net",
-    port: "587",
-    authentication: "plain",
-    enable_starttls_auto: true,
-    user_name: Rails.application.credentials.smtp[:username],
-    password: Rails.application.credentials.smtp[:password]
+    port: ENV['SMTP_PORT'],
+    address: ENV['SMTP_SERVER'],
+    user_name: ENV['SMTP_LOGIN'].presence,
+    password: ENV['SMTP_PASSWORD'].presence,
+    domain: ENV['SMTP_DOMAIN'] || ENV['LOCAL_DOMAIN'],
+    authentication: ENV['SMTP_AUTH_METHOD'] == 'none' ? nil : ENV['SMTP_AUTH_METHOD'] || :plain,
+    ca_file: ENV['SMTP_CA_FILE'].presence || '/etc/ssl/certs/ca-certificates.crt',
+    openssl_verify_mode: ENV['SMTP_OPENSSL_VERIFY_MODE'],
+    enable_starttls: enable_starttls,
+    enable_starttls_auto: enable_starttls_auto,
+    tls: ENV['SMTP_TLS'].presence && ENV['SMTP_TLS'] == 'true',
+    ssl: ENV['SMTP_SSL'].presence && ENV['SMTP_SSL'] == 'true',
   }
 
-  config.action_mailer.default_url_options = {
-    host: "accounts.kosmos.org",
-    protocol: "https",
-    from: "accounts@kosmos.org"
-  }
+  config.action_mailer.delivery_method = ENV.fetch('SMTP_DELIVERY_METHOD', 'smtp').to_sym
 
   # Ignore bad email addresses and do not raise email delivery errors.
   # Set this to true and configure the email server for immediate delivery to raise delivery errors.
-  # config.action_mailer.raise_delivery_errors = false
+  config.action_mailer.raise_delivery_errors = true
 
   # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
   # the I18n.default_locale when a translation cannot be found).