@iotize/ionic
Version:
Iotize specific building blocks on top of @ionic/angular.
93 lines • 12.8 kB
JavaScript
export function checkManufacturerDataMatch(parsedScanRecors, manufacturerDataFilters) {
const companyIdentifierRecords = parsedScanRecors.filter((record) => {
return record.type === 0xff && record.data.length >= 2;
});
if (companyIdentifierRecords.length === 0) {
return false;
}
else if (companyIdentifierRecords.length > 1) {
console.warn(`Multiple company identifier record found. Only using the first one`);
}
const manufacturerDataRecord = companyIdentifierRecords[0];
const recordCompanyIdentifierId = _toUint16(manufacturerDataRecord.data);
return !!manufacturerDataFilters.find((manufacturerDataFilter) => {
const filterManufacturerId = _toUint16(manufacturerDataFilter.companyIdentifier);
if (filterManufacturerId !== recordCompanyIdentifierId) {
return false;
}
if (manufacturerDataFilter.dataPrefix) {
return checkManufacturerDataPrefix(manufacturerDataRecord.data.subarray(2), manufacturerDataFilter.dataPrefix, manufacturerDataFilter.mask);
}
return true;
});
}
export function parseScanRecords(scanRecord) {
const records = [];
if (!scanRecord?.length) {
return records;
}
let index = 0;
const arrayScanRecord = Uint8Array.from(scanRecord);
while (index < arrayScanRecord.length) {
const length = arrayScanRecord[index++];
//Done once we run out of records
if (length == 0)
break;
const type = arrayScanRecord[index++];
//Done if our record isn't a valid type
if (type == 0)
break;
const dataLength = length - 1;
const data = Uint8Array.from(arrayScanRecord.slice(index, index + dataLength));
index += dataLength;
records.push({
data,
length,
type,
});
}
return records;
}
function checkManufacturerDataPrefix(data, dataPrefix, mask) {
const subData = Uint8Array.from(data).subarray(0, dataPrefix.length);
if (mask) {
for (let bytePosition = 0; bytePosition < dataPrefix.length; bytePosition++) {
const dataByte = data[bytePosition];
const dataPrefixByte = dataPrefix[bytePosition];
const maskByte = mask[bytePosition];
if (maskByte) {
for (let bitPosition = 0; bitPosition < 8; bitPosition++) {
const mask = 1 << (7 - bitPosition);
if ((maskByte & mask) === 0) {
// If mask bit is not set, we don't need to check this bit
continue;
}
if ((dataByte & mask) !== (dataPrefixByte & mask)) {
return false;
}
}
}
}
return true;
}
else {
return arrayEquals(subData, dataPrefix);
}
}
function arrayEquals(arg0, dataPrefix) {
return (arg0.length === dataPrefix.length &&
arg0.every((v, index) => v === dataPrefix[index]));
}
function _toUint16(data) {
if (!data) {
return 0;
}
else if (typeof data === 'number') {
return data;
}
else {
const uint8Array = Uint8Array.from(data);
return (uint8Array[0] << 8) + uint8Array[1];
}
}
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Only using the first one`\n    );\n  }\n  const manufacturerDataRecord = companyIdentifierRecords[0];\n  const recordCompanyIdentifierId = _toUint16(manufacturerDataRecord.data);\n  return !!manufacturerDataFilters.find((manufacturerDataFilter) => {\n    const filterManufacturerId = _toUint16(\n      manufacturerDataFilter.companyIdentifier\n    );\n    if (filterManufacturerId !== recordCompanyIdentifierId) {\n      return false;\n    }\n    if (manufacturerDataFilter.dataPrefix) {\n      return checkManufacturerDataPrefix(\n        manufacturerDataRecord.data.subarray(2),\n        manufacturerDataFilter.dataPrefix,\n        manufacturerDataFilter.mask\n      );\n    }\n    return true;\n  });\n}\n\nexport function parseScanRecords(\n  scanRecord: number[] | Buffer | Uint8Array | undefined\n): ScanRecord[] {\n  const records: ScanRecord[] = [];\n  if (!scanRecord?.length) {\n    return records;\n  }\n  let index = 0;\n  const arrayScanRecord = Uint8Array.from(scanRecord);\n  while (index < arrayScanRecord.length) {\n    const length = arrayScanRecord[index++];\n    //Done once we run out of records\n    if (length == 0) break;\n\n    const type = arrayScanRecord[index++];\n    //Done if our record isn't a valid type\n    if (type == 0) break;\n\n    const dataLength = length - 1;\n    const data = Uint8Array.from(\n      arrayScanRecord.slice(index, index + dataLength)\n    );\n    index += dataLength;\n\n    records.push({\n      data,\n      length,\n      type,\n    });\n  }\n\n  return records;\n}\n\nfunction checkManufacturerDataPrefix(\n  data: Uint8Array | number[],\n  dataPrefix: Uint8Array | number[],\n  mask: Uint8Array | number[] | undefined\n): boolean {\n  const subData = Uint8Array.from(data).subarray(0, dataPrefix.length);\n  if (mask) {\n    for (\n      let bytePosition = 0;\n      bytePosition < dataPrefix.length;\n      bytePosition++\n    ) {\n      const dataByte = data[bytePosition];\n      const dataPrefixByte = dataPrefix[bytePosition];\n      const maskByte = mask[bytePosition];\n      if (maskByte) {\n        for (let bitPosition = 0; bitPosition < 8; bitPosition++) {\n          const mask = 1 << (7 - bitPosition);\n          if ((maskByte & mask) === 0) {\n            // If mask bit is not set, we don't need to check this bit\n            continue;\n          }\n          if ((dataByte & mask) !== (dataPrefixByte & mask)) {\n            return false;\n          }\n        }\n      }\n    }\n    return true;\n  } else {\n    return arrayEquals(subData, dataPrefix);\n  }\n}\n\nfunction arrayEquals(\n  arg0: Uint8Array | number[],\n  dataPrefix: Uint8Array | number[]\n): boolean {\n  return (\n    arg0.length === dataPrefix.length &&\n    arg0.every((v, index) => v === dataPrefix[index])\n  );\n}\n\nfunction _toUint16(data: Uint8Array | number[] | number | undefined) {\n  if (!data) {\n    return 0;\n  } else if (typeof data === 'number') {\n    return data;\n  } else {\n    const uint8Array = Uint8Array.from(data);\n    return (uint8Array[0] << 8) + uint8Array[1];\n  }\n}\n"]}