wagtail-localize-smartling

Wagtail Localize Smartling

An extension for Wagtail Localize that integrates with the Smartling translation platform.

Links

• Documentation
• Changelog
• Contributing
• Security
• Smartling API documentation

Supported versions

• Python 3.8+
• Django 4.2+
• Wagtail 6.1+

Installation

1. Install the package from PyPI:

   python -m pip install wagtail-localize-smartling
   

2. Add "wagtail_localize_smartling" to INSTALLED_APPS in your Django settings. Make sure it's before "wagtail_localize" and "wagtail_localize.locales":

   INSTALLED_APPS = [
       ...
       "wagtail_localize_smartling",
       "wagtail_localize",
       "wagtail_localize.locales",
       ...
   ]
   

3. Configure the plugin in your Django settings:

    WAGTAIL_LOCALIZE_SMARTLING = {
        # Required settings (get these from "Account settings" > "API" in the Smartling dashboard)
        "PROJECT_ID": "<project_id>",
        "USER_IDENTIFIER": "<user_identifier>",
        "USER_SECRET": "<user_secret>",
        # Optional settings and their default values
        "REQUIRED": False,  # Set this to True to always send translations to Smartling
        "ENVIRONMENT": "production",  # Set this to "staging" to use Smartling's staging API
        "API_TIMEOUT_SECONDS": 5.0,  # Timeout in seconds for requests to the Smartling API
    }
   

   ---

   If your project's locales do not match those in Smartling (e.g. ro in your project, ro-RO in Smartling), then you can provide a Wagtail locale ID to Smartling locale ID mapping via the LOCALE_TO_SMARTLING_LOCALE setting:

   WAGTAIL_LOCALIZE_SMARTLING = {
       "LOCALE_TO_SMARTLING_LOCALE": {
           "ro": "ro-RO"
       }
   }
   

   ... or you can specify a callable or a dotted path to a callable in the LOCALE_MAPPING_CALLBACK setting:

   def map_project_locale_to_smartling(locale: str) -> str:
       if locale == "ro":
           return "ro-RO"
       return locale
   
   
   WAGTAIL_LOCALIZE_SMARTLING = {
       # ...
       "LOCALE_MAPPING_CALLBACK": "settings.map_project_locale_to_smartling"
   }
   

   The callback receives a WAGTAIL_CONTENT_LANGUAGES locale code string and is expected to return a valid mapped locale ID (or the original locale ID).

   Note that by default, when syncing translations the project will attempt to reformat a mixed-case, Smartling-style language code (e.g. zh-CN) into a Django-style all-lowercase code (e.g. zh-cn). Depending on how language codes are set up in your project, this behaviour may not be appropriate. You can disable it by settings the REFORMAT_LANGUAGE_CODES setting to False (the default is True):

   WAGTAIL_LOCALIZE_SMARTLING = {
       # ...
       "REFORMAT_LANGUAGE_CODES": False
   }
   
   

   ---

   If you need to customize the default Job description, you can specify a callable or a dotted path to a callable in the JOB_DESCRIPTION_CALLBACK setting:

   from typing import Iterable
   from wagtail_localize.models import Translation, TranslationSource
   
   def enhance_job_description(
       description: str,
       translation_source: TranslationSource,
       translations: Iterable[Translation]
   ) -> str:
       # note: to get the source instance, use translation_source.get_source_instance()
       return description + " my text."
   

   The callback receives the default description string, the job TranslationSource instance, and the list of target Translations. It expected to return string.

   ---

   If you want to pass a Visual Context to Smartling after a Job is synced, you need to provide a way to get hold of the appropriate URL for the page to use context. You provide this via the VISUAL_CONTEXT_CALLBACK setting.

   If this callback is defined, it will be used to send the visual context to Smartling. This step happens just after the regular sync of a Job to Smartling and only if the callback is defined.

   The callback must take the Job instance and return:

   1. a URL for the page that shows the content used to generate that Job
   2. the HTML of the page.

   
   from wagtail.models import Page
   from wagtail_localize.models import Job
   from wagtail_localize_smartling.exceptions import IncapableVisualContextCallback
   
   def get_visual_context(job: Job) -> tuple[str, str]:
   
       # This assumes the page is live and visible. If the page is a
       # draft, you will need a some custom work to expose the draft
       # version of the page
   
       content_obj = job.translation_source.get_source_instance()
   
       # IMPORTANT: if your translatable objects include some where a visual
       # context is not available via a standalone, public URL (eg a Snippet,
       # rather than a Page), then your settings.VISUAL_CONTEXT_CALLBACK function
       # should raise IncapableVisualContextCallback with an explaination.
   
       # Below, we check if the object is a Page, but depending on how your objects
       # are previewable, you could use isinstance(content_obj, PreviewableMixin)
   
       if not isinstance(content_obj, Page):
           raise IncapableVisualContextCallback(
               "Object was not visually previewable"
           )
   
       page_url = page.full_url
   
       html = # code to render that page instance
   
       return page_url, html
   
   

   Note that if the syncing of the visual context fails, this will break the overall sync to Smartling, leaving an inconsistent state: there'll be a Job created in Smartling that's awaiting approval, but Wagtail will still think the job needs to be created. This, in turn, will mean we get duplicate job errors on the retry. Therefore, it is essential you have log handling set up to catch the ERROR-level alert that will happen at this point.

4. Run migrations:

   ./manage.py migrate
   

Setup

Smartling project setup

For the plugin to work with a Smartling project, the Django/Wagtail internationalization- and localization-related settings must be compatible with the project's language settings:

• Only Wagtail content authored in the same language as the Smartling project's source language can be translated.
• Ideally, the language tags in WAGTAIL_CONTENT_LANGUAGES should be the exact, case-insensitive matches for the Smartling projects target locales. For example, if your Smartling project targets fr-FR, then you must have "fr-fr" in your WAGTAIL_CONTENT_LANGUAGES, not just "fr". However, if that is not possible, use the LOCALE_TO_SMARTLING_LOCALE or LOCALE_MAPPING_CALLBACK settings to map your Wagtail language codes to the Smartling language codes.

Synchronization

The plugin provides a sync_smartling management command that:

• Creates jobs in Smartling for new content that's awaiting translation
• Checks the status of pending translation jobs
• Downloads and applies translations for completed jobs

This command should be set to run periodically via cron or similiar:

./manage.py sync_smartling

We recommend running this regularly, around once every 10 minutes.

Callbacks

As well as the sync_smartling management command, the plugin sets the callbackUrl field on the Smartling jobs it creates to the URL of webhook handler view. This handler will proactively download and apply translations from completed jobs without waiting for the next sync_smartling run. This URL is based on the WAGTAILADMIN_BASE_URL setting, so it's important that's set and accessible from the internet.

[!WARNING] Callbacks should not be relied on as the only method for downloading translations. Always make sure the sync_smartling command is run regularly to ensure your translations are up-to-date.

Usage

Submitting new content for translation

Updating translations

How it works

Workflow

Submitting pages for Smartling translation

flowchart LR

    submitPageForTranslation["Page submitted for translation in Wagtail"]
    submitToSmartling{"
        User choses to submit
        translation job to Smartling?
    "}
    enterSmartlingJobConfig["User enters Smartling job config"]
    pendingSmartlingJobCreated["A pending Smartling job is created in Wagtail"]
    wagtailSyncedTranslationEditView["
        User is redirected to Wagtail's
        synced translation edit view
    "]

    submitPageForTranslation-->submitToSmartling
    submitToSmartling-->|Yes|enterSmartlingJobConfig
    enterSmartlingJobConfig-->pendingSmartlingJobCreated
    pendingSmartlingJobCreated-->wagtailSyncedTranslationEditView
    submitToSmartling-->|No|wagtailSyncedTranslationEditView

Smartling sync

django-admin sync_smartling, the below flowchart describes the logic run for each job

flowchart LR

    jobSentToSmartling{"Has the job been
    sent to Smartling yet?"}
    sendJobToSmartling["Send job to Smartling"]
    jobFinished{"Is the job finalised?"}
    updateJobFromSmartling["Update job from Smartling"]
    fin["End"]

    jobSentToSmartling-->|Yes|jobFinished
    jobSentToSmartling-->|No|sendJobToSmartling
    sendJobToSmartling-->fin
    jobFinished-->|Yes|fin
    jobFinished-->|No|updateJobFromSmartling

Signals

This app provides a single wagtail_localize.signals.translation_imported signal that is sent when translation are imported from Smartling.

Signal kwargs:

• sender: The wagtail_localize_smartling.models.Job class
• instance: The Job instance for which translation are being imported
• translation: The wagtail_localize.models.Translation instance the translations are being imported to. Use translation.get_target_instance() to get the model instance that the translation is for (e.g. a page or snippet)

Cutting a new release

1. Bump the version in https://github.com/mozilla/wagtail-localize-smartling/blob/main/src/wagtail_localize_smartling/__init__.py
2. Update CHANGELOG.md
3. Commit and land the changes in main (via a PR, or committing to main if you're sure this won't cause clashes)
4. Tag the release as vX.Y.Z on main – or make a tag via the GH UI in Step 6. (Remember to push up the new tag if you made it locally, with git push --tags)
5. Add a new Release via https://github.com/mozilla/wagtail-localize-smartling/releases
6. Select (or create) the new tag, add the title and description
7. Ensure the new Release is marked as latest (see checkboxes below the Release description)
8. Publish the new Release within GitHub - automation will take of the rest and push it up to PyPI