feat: Ability to delete account for administrators (#1874)

## Description

Add account delete option in the user account settings.

Fixes #1555 

## Type of change

- [ ] New feature (non-breaking change which adds functionality)


![image](https://user-images.githubusercontent.com/40784971/110349673-edcc5200-8058-11eb-8ded-a31d15aa0759.png)

![image](https://user-images.githubusercontent.com/40784971/110349778-0c324d80-8059-11eb-9291-abfbffedde5e.png)


## Checklist:

- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my own code
- [ ] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [ ] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules

---------

Co-authored-by: Sojan Jose <sojan@pepalo.com>
Co-authored-by: Sojan Jose <sojan.official@gmail.com>
Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

app/mailers/administrator_notifications/account_notification_mailer.rb

@@ -0,0 +1,48 @@
+class AdministratorNotifications::AccountNotificationMailer < AdministratorNotifications::BaseMailer
+  def account_deletion(account, reason = 'manual_deletion')
+    subject = 'Your account has been marked for deletion'
+    action_url = settings_url('general')
+    meta = {
+      'account_name' => account.name,
+      'deletion_date' => account.custom_attributes['marked_for_deletion_at'],
+      'reason' => reason
+    }
+
+    send_notification(subject, action_url: action_url, meta: meta)
+  end
+
+  def contact_import_complete(resource)
+    subject = 'Contact Import Completed'
+
+    action_url = if resource.failed_records.attached?
+                   Rails.application.routes.url_helpers.rails_blob_url(resource.failed_records)
+                 else
+                   "#{ENV.fetch('FRONTEND_URL', nil)}/app/accounts/#{resource.account.id}/contacts"
+                 end
+
+    meta = {
+      'failed_contacts' => resource.total_records - resource.processed_records,
+      'imported_contacts' => resource.processed_records
+    }
+
+    send_notification(subject, action_url: action_url, meta: meta)
+  end
+
+  def contact_import_failed
+    subject = 'Contact Import Failed'
+    send_notification(subject)
+  end
+
+  def contact_export_complete(file_url, email_to)
+    subject = "Your contact's export file is available to download."
+    send_notification(subject, to: email_to, action_url: file_url)
+  end
+
+  def automation_rule_disabled(rule)
+    subject = 'Automation rule disabled due to validation errors.'
+    action_url = settings_url('automation/list')
+    meta = { 'rule_name' => rule.name }
+
+    send_notification(subject, action_url: action_url, meta: meta)
+  end
+end

app/mailers/administrator_notifications/base_mailer.rb

@@ -0,0 +1,31 @@
+class AdministratorNotifications::BaseMailer < ApplicationMailer
+  # Common method to check SMTP configuration and send mail with liquid
+  def send_notification(subject, to: nil, action_url: nil, meta: {})
+    return unless smtp_config_set_or_development?
+
+    @action_url = action_url
+    @meta = meta || {}
+
+    send_mail_with_liquid(to: to || admin_emails, subject: subject) and return
+  end
+
+  # Helper method to generate inbox URL
+  def inbox_url(inbox)
+    "#{ENV.fetch('FRONTEND_URL', nil)}/app/accounts/#{Current.account.id}/settings/inboxes/#{inbox.id}"
+  end
+
+  # Helper method to generate settings URL
+  def settings_url(section)
+    "#{ENV.fetch('FRONTEND_URL', nil)}/app/accounts/#{Current.account.id}/settings/#{section}"
+  end
+
+  private
+
+  def admin_emails
+    Current.account.administrators.pluck(:email)
+  end
+
+  def liquid_locals
+    super.merge({ meta: @meta })
+  end
+end

app/mailers/administrator_notifications/channel_notifications_mailer.rb

@@ -1,93 +1,16 @@
-class AdministratorNotifications::ChannelNotificationsMailer < ApplicationMailer
-  def slack_disconnect
-    return unless smtp_config_set_or_development?
-
-    subject = 'Your Slack integration has expired'
-    @action_url = "#{ENV.fetch('FRONTEND_URL', nil)}/app/accounts/#{Current.account.id}/settings/integrations/slack"
-    send_mail_with_liquid(to: admin_emails, subject: subject) and return
-  end
-
-  def dialogflow_disconnect
-    return unless smtp_config_set_or_development?
-
-    subject = 'Your Dialogflow integration was disconnected'
-    send_mail_with_liquid(to: admin_emails, subject: subject) and return
-  end
-
+class AdministratorNotifications::ChannelNotificationsMailer < AdministratorNotifications::BaseMailer
   def facebook_disconnect(inbox)
-    return unless smtp_config_set_or_development?
-
     subject = 'Your Facebook page connection has expired'
-    @action_url = "#{ENV.fetch('FRONTEND_URL', nil)}/app/accounts/#{Current.account.id}/settings/inboxes/#{inbox.id}"
-    send_mail_with_liquid(to: admin_emails, subject: subject) and return
+    send_notification(subject, action_url: inbox_url(inbox))
   end
 
   def whatsapp_disconnect(inbox)
-    return unless smtp_config_set_or_development?
-
     subject = 'Your Whatsapp connection has expired'
-    @action_url = "#{ENV.fetch('FRONTEND_URL', nil)}/app/accounts/#{Current.account.id}/settings/inboxes/#{inbox.id}"
-    send_mail_with_liquid(to: admin_emails, subject: subject) and return
+    send_notification(subject, action_url: inbox_url(inbox))
   end
 
   def email_disconnect(inbox)
-    return unless smtp_config_set_or_development?
-
     subject = 'Your email inbox has been disconnected. Please update the credentials for SMTP/IMAP'
-    @action_url = "#{ENV.fetch('FRONTEND_URL', nil)}/app/accounts/#{Current.account.id}/settings/inboxes/#{inbox.id}"
-    send_mail_with_liquid(to: admin_emails, subject: subject) and return
-  end
-
-  def contact_import_complete(resource)
-    return unless smtp_config_set_or_development?
-
-    subject = 'Contact Import Completed'
-
-    @action_url = Rails.application.routes.url_helpers.rails_blob_url(resource.failed_records) if resource.failed_records.attached?
-    @action_url ||= "#{ENV.fetch('FRONTEND_URL', nil)}/app/accounts/#{resource.account.id}/contacts"
-    @meta = {}
-    @meta['failed_contacts'] = resource.total_records - resource.processed_records
-    @meta['imported_contacts'] = resource.processed_records
-    send_mail_with_liquid(to: admin_emails, subject: subject) and return
-  end
-
-  def contact_import_failed
-    return unless smtp_config_set_or_development?
-
-    subject = 'Contact Import Failed'
-
-    @meta = {}
-    send_mail_with_liquid(to: admin_emails, subject: subject) and return
-  end
-
-  def contact_export_complete(file_url, email_to)
-    return unless smtp_config_set_or_development?
-
-    @action_url = file_url
-    subject = "Your contact's export file is available to download."
-
-    send_mail_with_liquid(to: email_to, subject: subject) and return
-  end
-
-  def automation_rule_disabled(rule)
-    return unless smtp_config_set_or_development?
-
-    @action_url ||= "#{ENV.fetch('FRONTEND_URL', nil)}/app/accounts/#{Current.account.id}/settings/automation/list"
-
-    subject = 'Automation rule disabled due to validation errors.'.freeze
-    @meta = {}
-    @meta['rule_name'] = rule.name
-
-    send_mail_with_liquid(to: admin_emails, subject: subject) and return
-  end
-
-  private
-
-  def admin_emails
-    Current.account.administrators.pluck(:email)
-  end
-
-  def liquid_locals
-    super.merge({ meta: @meta })
+    send_notification(subject, action_url: inbox_url(inbox))
   end
 end

app/mailers/administrator_notifications/integrations_notification_mailer.rb

@@ -0,0 +1,12 @@
+class AdministratorNotifications::IntegrationsNotificationMailer < AdministratorNotifications::BaseMailer
+  def slack_disconnect
+    subject = 'Your Slack integration has expired'
+    action_url = settings_url('integrations/slack')
+    send_notification(subject, action_url: action_url)
+  end
+
+  def dialogflow_disconnect
+    subject = 'Your Dialogflow integration was disconnected'
+    send_notification(subject)
+  end
+end