src/app/util/time-util.h

/**
 *
 *    Copyright (c) 2020 Project CHIP Authors
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

/**
 *
 *    Copyright (c) 2020 Silicon Labs
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
/***************************************************************************/
/**
 * @file
 * @brief
 *******************************************************************************
 ******************************************************************************/

#pragma once

#define SECONDS_IN_MINUTE 60
#define SECONDS_IN_HOUR 3600
#define SECONDS_IN_DAY (SECONDS_IN_MINUTE * 60 * 24)
#define SECONDS_IN_WEEK (SECONDS_IN_DAY * 7)
#define DURATION_FOREVER_U32 0xFFFFFFFFU

/**
 * @brief ZCL Date comparison function.
 * The results are undefined for dates that contain the do not care value
 * in any of the subfields.
 * @return -1, if val1 is smaller
 *          0, if they are the same
 *          1, if val2 is smaller
 */
int8_t emberAfCompareDates(EmberAfDate * date1, EmberAfDate * date2);

/**
 * @brief function that copies a ZigBee Date into a buffer
 */
void emberAfCopyDate(uint8_t * data, uint16_t index, EmberAfDate * src);

/**
 * @brief Decode the given uint32_t into a ZCL Date object where
 * the uint32_t is formatted as follows:
 *
 * (0xFF000000 & value) = year
 * (0x00FF0000 & value) = month
 * (0x0000FF00 & value) = day of month
 * (0x000000FF & value) = day of week
 *
 */
void emberAfDecodeDate(uint32_t src, EmberAfDate * dest);

/**
 * @brief Encode and return the given ZCL Date object as an uint32_t.
 * Refer to emberAFDecodeDate for details on how the information is stored
 * within an uint32_t.
 */
uint32_t emberAfEncodeDate(EmberAfDate * date);

/**
 * @brief Fills the a time structure based on the passed UTC time.
 *
 */
void emberAfFillTimeStructFromUtc(uint32_t utcTime, EmberAfTimeStruct * returnTime);
/**
 * @brief Returns the number of days in the month specified in the EmberAfTimeStruct.
 *
 */
uint8_t emberAfGetNumberDaysInMonth(EmberAfTimeStruct * time);

/**
 * @brief Calculate a UTC time from the passed time structure.
 *
 */
uint32_t emberAfGetUtcFromTimeStruct(EmberAfTimeStruct * time);

/**
 * @brief Determine the week day (Monday=0 ... Sunday=6) based on
 * a specified UTC time.
 */
uint8_t emberAfGetWeekdayFromUtc(uint32_t utcTime);

/**
 * @brief Sets current time.
 * Convenience function for setting the time to a value.
 * If the time server cluster is implemented on this device,
 * then this call will be passed along to the time cluster server
 * which will update the time. Otherwise the emberAfSetTimeCallback
 * is called, which in the case of the stub does nothing.
 *
 * @param utcTime A ZigBee time, the number of seconds since the
 *                year 2000.
 */
void emberAfSetTime(uint32_t utcTime);

/**
 * @brief Retrieves current time.
 *
 * Convienience function for retrieving the current time.
 * If the time server cluster is implemented, then the time
 * is retrieved from that cluster's time attribute. Otherwise,
 * the emberAfGetCurrentTimeCallback is called.
 *
 * A real time is expected to in the ZigBee time format, the number
 * of seconds since the year 2000.
 */
uint32_t emberAfGetCurrentTime(void);

/**
 * @brief Prints time.
 *
 * Convenience function for all clusters to print time.
 * This function expects to be passed a ZigBee time which
 * is the number of seconds since the year 2000. If
 * EMBER_AF_PRINT_CORE is defined, this function will print
 * a human readable time from the passed value. If not, this
 * function will print nothing.
 *
 * @param utcTime A ZigBee time, the number of seconds since the
 *                year 2000.
 */
void emberAfPrintTime(uint32_t utcTime);

/**
 * @brief Prints the time in ISO 8601 format
 * yyyy-mm-dd hh:mm:ss
 *
 * @param utcTime A ZigBee time, the number of seconds since the
 *                year 2000.
 */
void emberAfPrintTimeIsoFormat(uint32_t utcTime);