clock.cpp

/* Author: Pratim Ugale <pratim.ugale@gmail.com>
 *
 * To change Date, Time settings of the clock, switch OFF "Automatically set time from the Internet" on your PC
 *
 * Run this program with root permissions(sudo)
 *
 */

#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <time.h>

using namespace std;

enum Volume{
  LOW =    1,
  MEDIUM = 2,
  HIGH =   3
};

enum AlarmTone{
  TONE1 = 1,
  TONE2 = 2,
  TONE3 = 3
};

class Clock{
  private:
    Volume volume;
    AlarmTone tone;
    int timeFormat = 12;

  public:
    Clock(){
      setVolume(LOW);
      setAlarmTone(TONE1);
    }
    void setVolume(Volume);
    void showTime();
    void setTime(int date, int month, int year,int hour, int min, int sec);
    void changeTimeFormat();
    void setAlarmTone(AlarmTone);
    void ringClock();
    void timer(int seconds);
    int getTimeFormat();

};

void Clock::showTime(){
  while(true){
    system("clear");
    time_t mytime = time(NULL);
    cout<<ctime(&mytime)<<endl;
    usleep(1000000);
  }
}

void Clock::setVolume(Volume volume){
  this->volume = volume;
  cout<<"Volume set to "<<this->volume<<endl;
}

void Clock::setTime(int date, int month, int year,int hour, int min, int sec)
{
    //buffer to format command
    unsigned char buff[32]={0};
    //formatting command with the given parameters
    sprintf((char*)buff,(const char *)"date -s \"%02d/%02d/%04d %02d:%02d:%02d\"",month,date,year,hour,min,sec);
    //execute formatted command using system()
    system((const char *)buff);
}

void Clock::setAlarmTone(AlarmTone tone){
  this->tone = tone;
  cout<<"Alarm Tone changed to TONE"<<this->tone<<endl;
}

void Clock::changeTimeFormat(){
  if(this->timeFormat == 12)
    this->timeFormat = 24;
  else if(this->timeFormat == 24)
    this->timeFormat = 12;
}

int Clock::getTimeFormat(){
  return this->timeFormat;
}

void Clock::timer(int seconds){
  usleep(seconds * 1000000);
  this->ringClock();
}

void Clock::ringClock(){
  if (this->volume == 1)
    cout<<"Timer rings with VOLUME: LOW and TONE: TONE"<<this->tone;
  else if (this->volume == 2)
    cout<<"Timer rings with VOLUME: MEDIUM and TONE: TONE"<<this->tone;
  else if (this->volume == 3)
    cout<<"Timer rings with VOLUME: HIGH and TONE: TONE"<<this->tone;
  cout<<endl;
  usleep(3000000);
}


int main(){

  static Clock clock;
  while(true){
    system("clear");
    time_t mytime = time(NULL);

    struct tm * timeinfo;
    timeinfo = localtime (&mytime);
    char buffer [150];
    if (clock.getTimeFormat() == 24)
      strftime (buffer,150,"Clock Display \n\t|\n\t-> TIME  : %R:%S %p (24 hr) \n\t-> DATE  : %d/%m/%Y\n\t-> DAY   : %A\n\t-> MONTH : %B  \n",timeinfo);
    else if (clock.getTimeFormat() == 12)
      strftime (buffer,150,"Clock Display \n\t|\n\t-> TIME  : %r (12 hr) \n\t-> DATE  : %d/%m/%Y\n\t-> DAY   : %A\n\t-> MONTH : %B \n",timeinfo);
    puts (buffer);

    //cout<<"CURRENT TIME: "<<endl<<"\t"<<ctime(&mytime)<<endl;
    cout<<"Clock Features:"<<endl;
    cout<<"1. Display Time Continuously \n2. Set Volume \n3. Set Date and Time \n4. Set Alarm Tone\n5. Switch b/w 12/24 Time Formats \n6. Use Timer \n7. Start Stopwatch"<<endl;
    int input;
    cin>>input;
    switch(input){
      case 1:
        clock.showTime();
        break;
      case 2:
        cout<<endl<<"Desired Volume:"<<endl;
        cout<<"1 -> LOW \n2 -> MEDIUM \n3 -> HIGH"<<endl;
        int volume;
        cin>>volume;
        if (volume == 1)
          clock.setVolume(LOW);
        else if (volume == 2)
          clock.setVolume(MEDIUM);
        else if (volume == 3)
          clock.setVolume(HIGH);
        break;
      case 3:
        cout<<"Enter (Day, Month, Year, Hours, Minutes, Seconds) in (DD, MM, YYYY, HH, MM, SS) format seperated by enter: "<<endl;
        int day, month, year, hours, minutes, seconds;
        cin>>day>>month>>year>>hours>>minutes>>seconds;
        clock.setTime(day, month, year, hours, minutes, seconds);
        break;
      case 4:
        cout<<endl<<"Desired Tone:"<<endl;
        cout<<"1 -> TONE1 \n2 -> TONE2 \n3 -> TONE3"<<endl;
        int tone;
        cin>>tone;
        if (tone == 1)
          clock.setAlarmTone(TONE1);
        else if (tone == 2)
          clock.setAlarmTone(TONE2);
        else if (tone == 3)
          clock.setAlarmTone(TONE3);
        break;
      case 5:
        clock.changeTimeFormat();
        break;
      case 6:
        cout<<"Timer value in seconds: "<<endl;
        int secs;
        cin>>secs;
        cout<<"The timer for "<<secs<<" seconds has started."<<endl;
        clock.timer(secs);
        break;
      case 7:
        cout<<"Stopwatch started."<<endl;
        int stopwatch = 0;
        while (true){
          system("clear");
          stopwatch++;
          cout<<"STOPWATCH \n\t|\n\t-> "<<stopwatch<<" seconds."<<endl<<endl;
          cout<<"Press ctrl-c to stop"<<endl;
          usleep(1000000);
        }

    }

  }
  return 0;
}