Blue Iris AI alerts in Node-RED

BlueIrisAI-NodeRedFunctionNode.js

const {img, ...otherPayloadFields} = msg.payload;
const objectsToFilter = new Set([
    'ball',
    'sports ball',
    'horse',
    'book',
    'suitcase',
]);

let formattedObjectNames = 'Nothing';
const objectsData = (otherPayloadFields.json || [])
    .find(x => x.api === 'objects');
// Would normally use `objectData?.found?.success` but Node-RED doesn't support it
const hasObjects = objectsData && objectsData.found && objectsData.found.success;
if (hasObjects) {
    // Using Array.from(new Set(...)) to dedupe object names
    const objectNames = Array.from(new Set(
        (objectsData.found.predictions || [])
            .sort(x => -x.confidence)
            .map(x => x.label)
            .filter(x => !objectsToFilter.has(x))
    ));
    if (objectNames.length > 0) {
        // Capitalise first letter of first object
        objectNames[0] = objectNames[0][0].toUpperCase() + objectNames[0].substring(1)
       formattedObjectNames = objectNames.join(' and ');
    }
}

const message = formattedObjectNames + ' detected at ' + otherPayloadFields.name;
return {
    image_filename: Date.now() + '-' + otherPayloadFields.id + '.jpg',
    message,
    object_names: formattedObjectNames,
    payload: Buffer.from(img, 'base64'),
    original_payload: otherPayloadFields,
};