image_item

Given Clean OpenHAB with latest Ruby Libraries
And items:
type name
Image Image

type	name
Image	Image

Image item provides access to underlying raw type

Given code in a rules file

Image.update "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABAQMAAAAl21bKAAAAA1BMVEUAAACnej3aAAAAAXRSTlMAQObYZgAAAApJREFUCNdjYAAAAAIAAeIhvDMAAAAASUVORK5CYII="
after 3.seconds do
  logger.info("Mime type: #{Image.mime_type}")
  logger.info("Number of bytes: #{Image.bytes.length}")
end

When I deploy the rules file
Then It should log "Mime type: image/png" within 10 seconds
And It should log "Number of bytes: 95" within 10 seconds

Image can be updated with base64 encoding images

Given code in a rules file

Image.update "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABAQMAAAAl21bKAAAAA1BMVEUAAACnej3aAAAAAXRSTlMAQObYZgAAAApJREFUCNdjYAAAAAIAAeIhvDMAAAAASUVORK5CYII="
after 3.seconds do
  logger.info("Mime type: #{Image.mime_type}")
  logger.info("Number of bytes: #{Image.bytes.length}")
end

When I deploy the rules file
Then It should log "Mime type: image/png" within 10 seconds
And It should log "Number of bytes: 95" within 10 seconds

Image can be updated with a byte array

Given file "1x1.png" is in the system temp dir

And a rule template:

require 'tmpdir'
Image.update_from_bytes(<update_parameters>)
after 3.seconds do
  logger.info("Mime type: #{Image.mime_type}")
  logger.info("Number of bytes: #{Image.bytes.length}")
end

When I deploy the rules file
Then It should log "Mime type: image/png" within 10 seconds
And It should log "Number of bytes: 95" within 10 seconds

Examples:

update_parameters
IO.binread(File.join('<%=Dir.tmpdir%>','1x1.png')), mime_type: 'image/png'
IO.binread(File.join('<%=Dir.tmpdir%>','1x1.png'))

Image can be updated with a file

Given file "1x1.png" is in the system temp dir

And a rule template:

require 'tmpdir'
Image.update_from_file(<update_parameters>)
after 3.seconds do
  logger.info("Mime type: #{Image.mime_type}")
  logger.info("Number of bytes: #{Image.bytes.length}")
end

When I deploy the rules file
Then It should log "Mime type: <mime_type>" within 10 seconds
And It should log "Number of bytes: 95" within 10 seconds

Examples:

update_parameters	mime_type
File.join('<%=Dir.tmpdir%>','1x1.png')	image/png
File.join('<%=Dir.tmpdir%>','1x1.png'), mime_type: 'foo/bar'	foo/bar

Image can be updated with a URL

Given code in a rules file

Image.update_from_url 'https://raw.githubusercontent.com/boc-tothefuture/openhab-jruby/main/features/assets/1x1.png'
after 3.seconds do
  logger.info("Mime type: #{Image.mime_type}")
  logger.info("Number of bytes: #{Image.bytes.length}")
end

When I deploy the rules file
Then It should log "Mime type: image/png" within 10 seconds
And It should log "Number of bytes: 95" within 10 seconds