Module: EchoUploads::Model

Extended by:
ActiveSupport::Concern
Defined in:
lib/echo_uploads/model.rb

Defined Under Namespace

Modules: ClassMethods

Instance Method Summary collapse

Instance Method Details

#echo_uploads_data ⇒ Object 



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# File 'lib/echo_uploads/model.rb', line 18

def echo_uploads_data
  Base64.encode64(JSON.dump(self.class.echo_uploads_config.inject({}) do |hash, (attr, cfg)|
    metas = send("#{attr}_tmp_metadata")
    if metas
      hash[attr] = metas.map do |meta|
        {'id' => meta.id, 'key' => meta.key}
      end
    end
    hash
  end)).strip
end

#echo_uploads_data=(data) ⇒ Object

Pass in a hash that’s been encoded as JSON and then Base64.



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# File 'lib/echo_uploads/model.rb', line 31

def echo_uploads_data=(data)
  parsed = JSON.parse Base64.decode64(data)
  # parsed will look like:
  # { 'attr1' => [ {'id' => 1, 'key' => 'abc...'} ] }
  unless parsed.is_a? Hash
    raise ArgumentError, "Invalid JSON structure in: #{parsed.inspect}"
  end
  parsed.each do |attr, attr_data|
    # If the :map option was passed, there may be multiple variants of the uploaded
    # file. Even if not, attr_data is still a one-element array.
    unless attr_data.is_a? Array
      raise ArgumentError, "Invalid JSON structure in: #{parsed.inspect}"
    end
    attr_data.each do |variant_data|
      unless variant_data.is_a? Hash
        raise ArgumentError, "Invalid JSON structure in: #{parsed.inspect}"
      end
      if meta = ::EchoUploads::File.where(
        id: variant_data['id'], key: variant_data['key'], temporary: true
      ).first
        if send("#{attr}_tmp_metadata").nil?
          send "#{attr}_tmp_metadata=", []
        end
        send("#{attr}_tmp_metadata") << meta
      end
    end
  end
end

#echo_uploads_map_metadata(attr, options) ⇒ Object

Helper method used internally by Echo Uploads.



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# File 'lib/echo_uploads/model.rb', line 61

def echo_uploads_map_metadata(attr, options)
  meta = send("#{attr}_metadata")
  meta ? yield(meta) : nil
end