* (WIP) Refactor the ImageStore interface to work with our latest alerting repository
* update alerting package
* refactor, new URLExists method in ImageProvider
* tests for the new methods
* fix linter warnings
* use alertingImages as an alias for grafana/alerting/images
* logs about image uris and not found images
* nerf image not found logs
* extract duplicated code to getImageFromURI() method
* refactor getImageFromURI()
* add index on url
* add comment about migration log
* sync generated files
* use tokens or urls in image annotations
* improve tests, fix some comments
* fix empty tokens
* code review changes, check for url before checking for token (support old token formats)
* chore: add alias for InitTestDB and Session
Adds an alias for the sqlstore InitTestDB and Session, and updates tests using these to reduce dependencies on the sqlstore.Store.
* next pass of removing sqlstore imports
* last little bit
* remove mockstore where possible
Adds three functions:
`withStoredImages` iterates over a list of models.Alerts, extracting a stored image's data from storage, if available, and executing a user-provided function.
`withStoredImage` does this for an image attached to a specific alert.
`openImage` finds and opens an image file on disk.
Moves `store.Image` to `models.Image`
Simplifies `channels.ImageStore` interface and updates notifiers that use it to use the simpler methods.
Updates all pkg/alert/notifier/channels to use withStoredImage routines.
If an image token is present in an alert instance, the email notifier will attempt to find a public URL for the image token. If found, it will add that to the email as the `ImageLink` field. If only local file data is available, the notifier will attach the file to the outgoing email using the `EmbeddedImage` field.
This change extracts screenshot data from alert messages via a private annotation `__alertScreenshotToken__` and attaches a URL to a Slack message or uploads the data to an image upload endpoint if needed.
This change also implements a few foundational functions for use in other notifiers.
This commit adds a pkg/services/screenshot package for taking and uploading screenshots of Grafana dashboards. It supports taking screenshots of both dashboards and individual panels within a dashboard, using the rendering service.
The screenshot package has the following services, most of which can be composed:
BrowserScreenshotService (Takes screenshots with headless Chrome)
CachableScreenshotService (Caches screenshots taken with another service such as BrowserScreenshotService)
NoopScreenshotService (A no-op screenshot service for tests)
SingleFlightScreenshotService (Prevents duplicate screenshots when taking screenshots of the same dashboard or panel in parallel)
ScreenshotUnavailableService (A screenshot service that returns ErrScreenshotsUnavailable)
UploadingScreenshotService (A screenshot service that uploads taken screenshots)
The screenshot package does not support wire dependency injection yet. ngalert constructs its own version of the service. See https://github.com/grafana/grafana/issues/49296
This PR also adds an ImageScreenshotService to ngAlert. This is used to take screenshots with a screenshotservice and then store their location reference for use by alert instances and notifiers.
