lib/services/event-information.js
'use strict';
const baAsn1 = require('../asn1');
const baEnum = require('../enum');
module.exports.encode = (buffer, events, moreEvents) => {
baAsn1.encodeOpeningTag(buffer, 0);
events.forEach((event) => {
baAsn1.encodeContextObjectId(buffer, 0, event.objectId.type, event.objectId.instance);
baAsn1.encodeContextEnumerated(buffer, 1, event.eventState);
baAsn1.encodeContextBitstring(buffer, 2, event.acknowledgedTransitions);
baAsn1.encodeOpeningTag(buffer, 3);
for (let i = 0; i < 3; i++) {
baAsn1.encodeApplicationDate(buffer, event.eventTimeStamps[i]);
baAsn1.encodeApplicationTime(buffer, event.eventTimeStamps[i]);
}
baAsn1.encodeClosingTag(buffer, 3);
baAsn1.encodeContextEnumerated(buffer, 4, event.notifyType);
baAsn1.encodeContextBitstring(buffer, 5, event.eventEnable);
baAsn1.encodeOpeningTag(buffer, 6);
for (let i = 0; i < 3; i++) {
baAsn1.encodeApplicationUnsigned(buffer, event.eventPriorities[i]);
}
baAsn1.encodeClosingTag(buffer, 6);
});
baAsn1.encodeClosingTag(buffer, 0);
baAsn1.encodeContextBoolean(buffer, 1, moreEvents);
};
module.exports.decode = (buffer, offset, apduLen) => {
let len = 0;
let result;
let decodedValue;
len++;
const alarms = [];
while ((apduLen - 3 - len) > 0) {
const value = {};
result = baAsn1.decodeTagNumberAndValue(buffer, offset + len);
len += result.len;
decodedValue = baAsn1.decodeObjectId(buffer, offset + len);
len += decodedValue.len;
value.objectId = {type: decodedValue.objectType, instance: decodedValue.instance};
result = baAsn1.decodeTagNumberAndValue(buffer, offset + len);
len += result.len;
decodedValue = baAsn1.decodeEnumerated(buffer, offset + len, result.value);
len += decodedValue.len;
value.eventState = decodedValue.value;
result = baAsn1.decodeTagNumberAndValue(buffer, offset + len);
len += result.len;
decodedValue = baAsn1.decodeBitstring(buffer, offset + len, result.value);
len += decodedValue.len;
value.acknowledgedTransitions = decodedValue.value;
result = baAsn1.decodeTagNumberAndValue(buffer, offset + len);
len += result.len;
value.eventTimeStamps = [];
for (let i = 0; i < 3; i++) {
if (result.tagNumber !== baEnum.ApplicationTags.NULL) {
decodedValue = baAsn1.decodeApplicationDate(buffer, offset + len);
len += decodedValue.len;
const date = decodedValue.value.value;
decodedValue = baAsn1.decodeApplicationTime(buffer, offset + len);
len += decodedValue.len;
const time = decodedValue.value.value;
value.eventTimeStamps[i] = new Date(date.getFullYear(), date.getMonth(), date.getDate(), time.getHours(), time.getMinutes(), time.getSeconds(), time.getMilliseconds());
} else {
len += result.value;
}
}
len++;
result = baAsn1.decodeTagNumberAndValue(buffer, offset + len);
len += result.len;
decodedValue = baAsn1.decodeEnumerated(buffer, offset + len, result.value);
len += decodedValue.len;
value.notifyType = decodedValue.value;
result = baAsn1.decodeTagNumberAndValue(buffer, offset + len);
len += result.len;
decodedValue = baAsn1.decodeBitstring(buffer, offset + len, result.value);
len += decodedValue.len;
value.eventEnable = decodedValue.value;
len++;
value.eventPriorities = [];
for (let i = 0; i < 3; i++) {
result = baAsn1.decodeTagNumberAndValue(buffer, offset + len);
len += result.len;
decodedValue = baAsn1.decodeUnsigned(buffer, offset + len, result.value);
len += decodedValue.len;
value.eventPriorities[i] = decodedValue.value;
}
len++;
alarms.push(value);
}
const moreEvents = (buffer[apduLen - 1] === 1);
return {
len: len,
alarms: alarms,
moreEvents: moreEvents
};
};