While the attachment JSON format supports it, it is currently not possible to set caption for uploaded attachments as it is missing from JSON RPC, CLI options and DBUS. And the function that would need to parse the caption (if any is attached) is defined here:
I propose a new --attachment-metadata (-am) vector option where the user could define the additional metadata for each attachment. For example, if 4 attachments are present:
Caption is currently implemented for ReceiveMessageHandler.java:
https://github.com/AsamK/signal-cli/blob/fab1b96c21ead48b64442f6d07beedef959de6ee/src/main/java/org/asamk/signal/ReceiveMessageHandler.java#L592
And also implemented here:
https://github.com/AsamK/signal-cli/blob/fab1b96c21ead48b64442f6d07beedef959de6ee/src/main/java/org/asamk/signal/json/JsonAttachment.java#L22
While the attachment JSON format supports it, it is currently not possible to set caption for uploaded attachments as it is missing from JSON RPC, CLI options and DBUS. And the function that would need to parse the caption (if any is attached) is defined here:
https://github.com/AsamK/signal-cli/blob/master/lib/src/main/java/org/asamk/signal/manager/util/AttachmentUtils.java#L30-L40
I propose a new
--attachment-metadata(-am) vector option where the user could define the additional metadata for each attachment. For example, if 4 attachments are present:-am '[{"caption":"image1_caption"}, None, {"width":800, "height":600}, {"caption":"image4_caption", "width":800, "height":600}]'This would allow not only to support caption but also additional metadata such as voiceNote, borderless, preview, width, height, custom_filename, etc.