Method constructor

lib/property.ts:41–60

* Initialize the object. * * @param {Thing} thing Thing this property belongs to * @param {String} name Name of the property * @param {Value} value Value object to hold the property value * @param {Object} metadata Property metadata, i.e. type, description, unit, *

(thing: Thing,
              name: string,
              value: Value<ValueType>,
              metadata: Property.PropertyMetadata)

   *                          etc., as an object.
   */
  constructor(thing: Thing,
              name: string,
              value: Value<ValueType>,
              metadata: Property.PropertyMetadata) {
    this.thing = thing;
    this.name = name;
    this.value = value;
    this.hrefPrefix = '';
    this.href = `/properties/${this.name}`;
    this.metadata = JSON.parse(JSON.stringify(metadata || {}));

    delete metadata.title;
    delete metadata.unit;
    delete metadata['@type'];
    this.validate = ajv.compile(metadata);

    // Add the property change observer to notify the Thing about a property
    // change.
    this.value.on('update', () => this.thing.propertyNotify(this));
  }

  /**
   * Validate new property value before setting it.