Module: Ocpp::Rails::Protocol

Defined in:
app/services/ocpp/rails/protocol.rb

Class Method Summary collapse

Class Method Details

.build_call(message_id, action, payload) ⇒ Object

Build a CALL message (request from server to charge point or charge point to server) Format: [2, "message_id", "Action", payload]



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# File 'app/services/ocpp/rails/protocol.rb', line 7

def build_call(message_id, action, payload)
  [ 2, message_id, action, payload ].to_json
end

.build_callerror(message_id, error_code, error_description, details = {}) ⇒ Object

Build a CALLERROR message (error response) Format: [4, "message_id", "error_code", "error_description", details]



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# File 'app/services/ocpp/rails/protocol.rb', line 19

def build_callerror(message_id, error_code, error_description, details = {})
  [ 4, message_id, error_code, error_description, details ].to_json
end

.build_callresult(message_id, payload) ⇒ Object

Build a CALLRESULT message (successful response) Format: [3, "message_id", payload]



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# File 'app/services/ocpp/rails/protocol.rb', line 13

def build_callresult(message_id, payload)
  [ 3, message_id, payload ].to_json
end

.parse(raw_message) ⇒ Object

Parse incoming JSON-RPC 2.0 message



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# File 'app/services/ocpp/rails/protocol.rb', line 24

def parse(raw_message)
  data = JSON.parse(raw_message)

  case data[0]
  when 2
    {
      type: "CALL",
      message_id: data[1],
      action: data[2],
      payload: data[3] || {}
    }
  when 3
    {
      type: "CALLRESULT",
      message_id: data[1],
      payload: data[2] || {}
    }
  when 4
    {
      type: "CALLERROR",
      message_id: data[1],
      error_code: data[2],
      error_description: data[3],
      details: data[4] || {}
    }
  else
    {
      type: "UNKNOWN",
      raw: data
    }
  end
rescue JSON::ParserError => e
  {
    type: "PARSE_ERROR",
    error: e.message,
    raw: raw_message
  }
end