Function convert

modules/io/ble/server/esp32/bleserver.js:103–178

(ad)

}

function convert(ad) {
	const buffer = new ArrayBuffer(0, {maxByteLength: 31});
	const bytes = new Uint8Array(buffer);
	for (let name in ad) {
		let offset = bytes.length;
		let value = ad[name];
		if (ArrayBuffer.isView(value))
			value = new Uint8Array(value.buffer, value.byteOffset, value.byteLength);

		switch (name) {
			case "name":
				value = ArrayBuffer.fromString(value);
				buffer.resize(offset + value.byteLength + 2);
				bytes[offset++] = value.byteLength + 1;
				bytes[offset++] = 9;		// local name
				bytes.set(new Uint8Array(value), offset);
				break;

			case "services":		// array of 8, 16, and 32 bit UUIDs....
				value = value.map(uuid => {
					uuid = Uint8Array.fromHex(uuid.replaceAll("-", ""));
					if ((2 !== uuid.length) && (4 !== uuid.length) && (16 !== uuid.length))
						throw new Error("invalid UUID");
					return uuid;
				});

				[2, 4, 16].forEach(length => {
					let i = value.filter(uuid => uuid.length === length);
					if (i.length) {
						buffer.resize(offset + i.length * length + 2);
						bytes[offset++] = i.length * length + 1;
						bytes[offset++] = (2 === length) ? 3 : ((4 === length) ? 5 : 7);		// incomplete 16 / 32 / 128
						i.forEach(uuid => {
							for (let j = 0; j < length; j++)
								bytes[offset++] = uuid[(length - 1)- j];
						});
					}
				});
				break;

			case "manufacturerData":
				buffer.resize(offset + value.data.byteLength + 2 + 2);
				bytes[offset++] = value.data.byteLength + 1 + 2;
				bytes[offset++] = 255;		// manufacturer data
				bytes[offset++] = value.manufacturer;
				bytes[offset++] = value.manufacturer >> 8;
				value = value.data;
				if (ArrayBuffer.isView(value))
					bytes.set(new Uint8Array(value.buffer, value.byteOffset, value.byteLength), offset);
				else
					bytes.set(new Uint8Array(value.buffer), offset);
				break;

			case "flags":
				buffer.resize(offset + 2 + 1);
				bytes[offset++] = 1 + 1;
				bytes[offset++] = 1;		// flags
				bytes[offset++] = value;