103 lines
3.6 KiB
Java
103 lines
3.6 KiB
Java
package nodomain.freeyourgadget.gadgetbridge.devices.miband;
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import nodomain.freeyourgadget.gadgetbridge.model.ActivityUser;
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import nodomain.freeyourgadget.gadgetbridge.service.devices.miband.DeviceInfo;
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import nodomain.freeyourgadget.gadgetbridge.util.CheckSums;
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import java.util.Arrays;
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public class UserInfo {
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private final String btAddress;
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private final String alias;
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private final int gender;
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private final int age;
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private final int height;
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private final int weight;
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private final int type;
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private byte[] data = new byte[20];
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/**
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* Creates a default user info.
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*
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* @param btAddress the address of the MI Band to connect to.
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*/
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public static UserInfo getDefault(String btAddress) {
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return new UserInfo(btAddress, "1550050550", ActivityUser.defaultUserGender, ActivityUser.defaultUserAge, ActivityUser.defaultUserHeightCm, ActivityUser.defaultUserWeightKg, 0);
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}
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/**
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* Creates a user info with the given data
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*
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* @param address the address of the MI Band to connect to.
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* @throws IllegalArgumentException when the given values are not valid
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*/
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public static UserInfo create(String address, String alias, int gender, int age, int height, int weight, int type) throws IllegalArgumentException {
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if (address == null || address.length() == 0 || alias == null || alias.length() == 0 || gender < 0 || age <= 0 || weight <= 0 || type < 0) {
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throw new IllegalArgumentException("Invalid parameters");
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}
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try {
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return new UserInfo(address, alias, gender, age, height, weight, type);
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} catch (Exception ex) {
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throw new IllegalArgumentException("Illegal user info data", ex);
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}
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}
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/**
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* Creates a user info with the given data
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*
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* @param address the address of the MI Band to connect to.
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*/
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private UserInfo(String address, String alias, int gender, int age, int height, int weight, int type) {
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this.btAddress = address;
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this.alias = alias;
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this.gender = gender;
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this.age = age;
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this.height = height;
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this.weight = weight;
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this.type = type;
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}
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private int calculateUidFrom(String alias) {
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int uid;
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try {
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uid = Integer.parseInt(alias);
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} catch (NumberFormatException ex) {
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uid = alias.hashCode(); // simple as that
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}
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return uid;
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}
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public byte[] getData(DeviceInfo mDeviceInfo) {
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byte[] sequence = new byte[20];
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int uid = calculateUidFrom(alias);
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sequence[0] = (byte) uid;
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sequence[1] = (byte) (uid >>> 8);
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sequence[2] = (byte) (uid >>> 16);
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sequence[3] = (byte) (uid >>> 24);
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sequence[4] = (byte) (gender & 0xff);
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sequence[5] = (byte) (age & 0xff);
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sequence[6] = (byte) (height & 0xff);
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sequence[7] = (byte) (weight & 0xff);
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sequence[8] = (byte) (type & 0xff);
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int aliasFrom = 9;
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if (mDeviceInfo.isMili1A() || mDeviceInfo.isMilli1S()) {
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sequence[9] = (byte) (mDeviceInfo.feature & 255);
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sequence[10] = (byte) (mDeviceInfo.appearance & 255);
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aliasFrom = 11;
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}
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byte[] aliasBytes = alias.substring(0, Math.min(alias.length(), 19-aliasFrom)).getBytes();
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System.arraycopy(aliasBytes, 0, sequence, aliasFrom, aliasBytes.length);
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byte[] crcSequence = Arrays.copyOf(sequence, 19);
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sequence[19] = (byte) ((CheckSums.getCRC8(crcSequence) ^ Integer.parseInt(this.btAddress.substring(this.btAddress.length() - 2), 16)) & 0xff);
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return sequence;
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}
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}
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