ZAPIException

require "json"

class ZAPIException < Exception
    property code : Int32, data : String?

    def initialize( jsrpc_error_h )
        if jsrpc_error_h.is_a?(NamedTuple) || jsrpc_error_h.is_a?(Hash)
            raise "Received invalid JSRPC error object" unless (msg=jsrpc_error_h["message"]?) && (code=jsrpc_error_h["code"]?)
            @message = msg.to_s
            if code.is_a?(Int32)
                @code = code
            else
                @code = -999
            end
            data = jsrpc_error_h["data"]?
            @data = (data && data.is_a?(String)) ? data : nil
        elsif jsrpc_error_h.is_a?(Array) && jsrpc_error_h.size>=2
            @code = 2
            @message = jsrpc_error_h
            @data = jsrpc_error_h[2]?
        end
    end
end

begin
    raise ZAPIException.new({"message"=>"somewhere in the darkness", "code": 789, "data": "Very long text....." })
rescue ex : ZAPIException
    puts "Error #{ex.message}, code ##{ex.code}, additional data: #{ex.data.to_json}"
end