Add slackFile field to element-level Image for Slack-hosted file references - #473
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kbasutkar-hubspot merged 4 commits intoSep 25, 2026
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…rences Slack's API supports slack_file (file ID) on image elements, allowing images uploaded to Slack to be referenced by ID instead of a URL. This is needed for Card hero_image to reference Slack-hosted screenshots. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
opaliukh
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Sep 25, 2026
| @@ -23,4 +25,6 @@ default String getType() { | |||
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It looks like this is optional now and we need to update it to allow providing an object without url, but this could be used in different repos, so please make sure that this change is safe.
Matches the pattern used by the top-level Image block where imageUrl is Optional<String>. When using slackFile (Slack-hosted file reference), imageUrl is not needed. Callers providing a URL should wrap it in Optional.of(). Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Update CardBlockTest assertions and Image.of() calls to work with Optional<String> imageUrl. Apply spotless formatting. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
opaliukh
approved these changes
Sep 25, 2026
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Summary
Adds
Optional<SlackFileObject> getSlackFile()to the element-levelImageIF(com.hubspot.slack.client.models.blocks.elements.ImageIF).Problem
Slack's API supports
slack_file(file ID) on image elements, allowing images uploaded to Slack to be referenced by ID instead of a URL. The top-levelImageblock already has this field, but the element-levelImage(used byCard.heroImage,Section.accessory, etc.) does not.Change
One field added to
elements/ImageIF.java:Matches the pattern already used by the top-level
ImageIFblock.Use case
The Slack integration team needs to reference Slack-uploaded screenshots in
Card.heroImagefor Breeze artifact preview cards. Without this field, we have to host images ourselves instead of letting Slack handle storage.