no issue
- store raw content in email record
- keep any replacement strings in the html/plaintext content so that it can be used when sending email rather than needing to re-serialize the post content which may have changed
- split post email serializer into separate serialization and replacement parsing functions
- serialization now returns any email content that is derived from the post content (subject/html/plaintext) rather than post content plus replacements
- `parseReplacements` has been split out so that it can be run against email content rather than a post, this allows mega and the email preview service to work with the stored email content
- move mailgun-specific functionality into the mailgun provider
- previously mailgun-specific behaviour was spread across the post email serializer, mega, and bulk-email service
- the per-batch `send` functionality was moved from the `bulk-email` service to the mailgun provider and updated to take email content, recipient info, and replacement info so that all mailgun-specific headers and replacement formatting can be handled in one place
- exposes the `BATCH_SIZE` constant because batch sizes are limited to what the provider allows
- `bulk-email` service split into three methods
- `send` responsible for taking email content and recipients, parsing replacement info from the email content and using that to collate a recipient data object, and finally coordinating the send via the mailgun provider. Usable directly for use-cases such as test emails
- `processEmail` takes an email ID, loads it and coordinates sending related batches concurrently
- `processEmailBatch` takes an email_batch ID, loads it along with associated email_recipient records and passes the data through to the `send` function, updating the batch status as it's processed
- `processEmail` and `processEmailBatch` take IDs rather than objects ready for future use by job-queues, it's best to keep job parameters as minimal as possible
- refactored `mega` service
- modified `getEmailData` to collate email content (from/reply-to/subject/html/plaintext) rather than being responsible for dealing with replacements and mailgun-specific replacement formats
- used for generating email content before storing in the email table, and when sending test emails
- from/reply-to calculation moved out of the post-email-serializer into mega and extracted into separate functions used by `getEmailData`
- `sendTestEmail` updated to generate `EmailRecipient`-like objects for each email address so that appropriate data can be supplied to the updated `bulk-email.send` method
- `sendEmailJob` updated to create `email_batches` and associated `email_recipients` records then hand over processing to the `bulk-email` service
- member row fetching extracted into a separate function and used by `createEmailBatches`
- moved updating of email status from `mega` to the `bulk-email` service, keeps concept of Successful/FailedBatch internal to the `bulk-email` service
refs https://github.com/TryGhost/Ghost/issues/11971
- Added statusCode from bulk email provider to API response
- Updated error messages for different bulk email(mailgun) failure states
- Added `context` to preview mail API error message with mail provider's error message
* refactored `core/frontend/apps` to destructure common imports
* refactored `core/frontend/services/{apps, redirects, routing}` to destructure common imports
* refactored `core/frontend/services/settings` to destructure common imports
* refactored remaining `core/frontend/services` to destructure common imports
* refactored `core/server/adapters` to destructure common imports
* refactored `core/server/data/{db, exporter, schema, validation}` to destructure common imports
* refactored `core/server/data/importer` to destructure common imports
* refactored `core/server/models/{base, plugins, relations}` to destructure common imports
* refactored remaining `core/server/models` to destructure common imports
* refactored `core/server/api/canary/utils/serializers/output` to destructure common imports
* refactored remaining `core/server/api/canary/utils` to destructure common imports
* refactored remaining `core/server/api/canary` to destructure common imports
* refactored `core/server/api/shared` to destructure common imports
* refactored `core/server/api/v2/utils` to destructure common imports
* refactored remaining `core/server/api/v2` to destructure common imports
* refactored `core/frontend/meta` to destructure common imports
* fixed some tests referencing `common.errors` instead of `@tryghost/errors`
- Not all of them need to be updated; only updating the ones that are
causing failures
* fixed errors import being shadowed by local scope
no issue
- fixed plaintext templates being word wrapped and breaking across replacement strings
- updated `postEmailSerializer.serialize` to return the email template plus a replacements array that can be used for creating Mailgun-like recipient variable objects or more straight forward replacement
- updated email-preview API to work with the replacements data to show fallback data when previewing
