File content as of revision 1:91c2c52b4691:

/*
Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
 
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
 
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
 
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/

#include "sprinkler_handler.h"
#include "share.h"
#include <string>
#include <cstring>

//#define __DEBUG
#include "dbg/dbg.h"

// there are only 4 zones for this sprinkler controller
Timer zone1Timer;   // timers are used here, and they only go for about 30 minutes
Timer zone2Timer;   // so this is not good for hours...
Timer zone3Timer;
Timer zone4Timer;
float zone1Interval;
float zone2Interval;
float zone3Interval;
float zone4Interval;
Timeout zone1Timeout;
Timeout zone2Timeout;
Timeout zone3Timeout;
Timeout zone4Timeout;

SprinklerHandler::SprinklerHandler(const char* rootPath, 
                                const char* path, 
                                TCPSocket* pTCPSocket) : HTTPRequestHandler(rootPath,
                                                                        path,
                                                                        pTCPSocket)
{

}

SprinklerHandler::~SprinklerHandler()
{
  DBG("\r\nHandler destroyed\r\n");
}

void SprinklerHandler::doGet()
{
  char resp[300];
 
  DBG("\r\nIn SprinklerHandler::doGet()\r\n");  
  lanActivity();
  // just output the current timer values for each zone
  const char * match;
  if ((match = strstr( path().c_str(), "zone1")) > 0) {
        sprintf( resp, "zone1=%f\n", zone1Timer.read() );
  } else if ((match = strstr( path().c_str(), "zone2")) > 0 ) {
        sprintf(  resp, "zone2=%f\n", zone2Timer.read() );
  } else if ((match = strstr( path().c_str(), "zone3")) > 0 ) {
       sprintf(  resp, "zone3=%f\n", zone3Timer.read() );
  } else if ((match = strstr( path().c_str(), "zone4")) > 0 ) {
        sprintf(  resp, "zone4=%f\n", zone4Timer.read() );
  } else {      // assume they want all the status
       sprintf( resp, "zone1=%f\nzone2=%f\nzone3=%f\nzone4=%f\n",
            zone1Timer.read(), zone2Timer.read(), zone3Timer.read(), zone4Timer.read() );
  }

  setContentLen( strlen(resp) ); 
  respHeaders()["Connection"] = "close";
  respHeaders()["Content-type"] = "text/html";
  writeData(resp, strlen(resp));
  DBG("\r\nExit SprinklerHandler::doGet()\r\n");
}

void SprinklerHandler::doPost()
{
 char data[128];
 string str = "POST path is " + path() + "\n";
 int maxlen = dataLen();
 if (maxlen > 127) { maxlen = 127; }
 int len = readData( data, maxlen );
 data[maxlen] = 0;
 string d = data;
 str += "and data is " + d + "\n";
 
 lanActivity();
 // find out if it's a reset or start
 const char * match = strstr( path().c_str(), "reset");
 if  (match > 0) {         // must be reset
    // handle reset
    zone1Timer.stop();
    zone2Timer.stop();
    zone3Timer.stop();
    zone4Timer.stop();
    compute1out = 0;
    compute2out = 0;
    compute3out = 0;
    compute4out = 0;
    // cancel any pending timer interrupts
    zone1Timeout.detach();
    zone2Timeout.detach();
    zone3Timeout.detach();
    zone4Timeout.detach();
    zone1Interval = 0;
    zone2Interval = 0;
    zone3Interval = 0;
    zone4Interval = 0;
    str = "OK";
    DBG("\r\nreset called\r\n");
  } else if ((match = strstr( path().c_str(), "start")) > 0) {    // must be start
    // get zone and duration from message - example:  zone=1&duration=300
     map<string, string> params;
    char line[128];
    char key[128];
    char value[128];
    char * from = data;
    while( parsekv(&from, line, 128) > 0) //if == 0, it is an empty line = end of headers
        {
         int n = sscanf(line, "%[^=]=%[^\n]", key, value);
         if ( n == 2 )
            {
            DBG("Read params : %s : %s\r\n", key, value);
             params[key] = value;
            }
        }   
    // get duration
    if (atoi(params["zone"].c_str()) < 1  || atoi(params["zone"].c_str()) > 4) {
        str = "unknown zone";
    } else {
        if (atoi(params["duration"].c_str()) <= 0) {
            str = "invalid duration";
        } else {
            int dur = atoi(params["duration"].c_str());
            switch (atoi(params["zone"].c_str())) {
                case 1:
                    zone1Timer.reset();
                    zone1Timer.start();
                    compute1out = 1;
                    zone1Interval = dur;
                    zone1Timeout.attach( this, &SprinklerHandler::turnOffZone1, dur );
                    break;
                    
                case 2:
                    zone2Timer.reset();
                    zone2Timer.start();
                    compute2out = 1;
                    zone2Interval = dur;
                    zone2Timeout.attach( this, &SprinklerHandler::turnOffZone2, dur );
                    break;
                    
                case 3:
                    zone3Timer.reset();
                    zone3Timer.start();
                    compute3out = 1;
                    zone3Interval = dur;
                    zone3Timeout.attach( this, &SprinklerHandler::turnOffZone3, dur );
                    break;
                    
                case 4:
                    zone4Timer.reset();
                    zone4Timer.start();
                    compute4out = 1;
                    zone4Interval = dur;
                    zone4Timeout.attach( this, &SprinklerHandler::turnOffZone4, dur );
                    break;
                    
                default:
                    str = "bad zone in case statement";
                    break;
            }
        }
    }
 
    DBG("\r\nstart called\r\n");
  }
  
  const char * resp = str.c_str(); 
  setContentLen( strlen(resp) );
  respHeaders()["Content-type"] = "text/html";
  respHeaders()["Connection"] = "close";
  writeData(resp, strlen(resp));
  DBG("\r\nExit SprinklerHandler::doPost()\r\n");
}

// taken from the HTTP parsing code
int SprinklerHandler::parsekv( char **from, char *to, int max ) {
    /*
     * look for & or \n and return key=value line
     */
     char *end;
     int retval = 0;
     
     end = strstr( *from, "&" );
     if (end) {
        int len = (end - *from);
        strncpy( to, *from, len);
        to[len] = 0;
        *from += len + 1;
        DBG("parsekv sending back %s\r\n", to);
        retval = 1;
     } else {
        // maybe this was the last parameter
        if (strstr(*from, "=")) {
            strncpy( to, *from, strlen(*from));
            to[strlen(*from)] = 0;
            *from += strlen(*from);
            DBG("parsekv sending back %s\r\n", to);
            retval = 1;
        }
        // nope, nothing left, just fall through and return 0
     }
    return retval;
}

void SprinklerHandler::doHead()
{

}

void SprinklerHandler::onReadable() //Data has been read
{

}

void SprinklerHandler::onWriteable() //Data has been written & buf is free
{
  DBG("\r\nSimpleHandler::onWriteable() event\r\n");
  close(); //Data written, we can close the connection
}

void SprinklerHandler::onClose() //Connection is closing
{
  //Nothing to do
}

void SprinklerHandler::turnOffZone1( void ) {
    zone1Timeout.detach();
    zone1Interval = 0;
    compute1out = 0;
    zone1Timer.stop();
    zone1Timer.reset();
}

void SprinklerHandler::turnOffZone2( void ) {
    zone2Timeout.detach();
    zone2Interval = 0;
    compute2out = 0;
    zone2Timer.stop();
    zone2Timer.reset();
}

void SprinklerHandler::turnOffZone3( void ) {
    zone3Timeout.detach();
    zone3Interval = 0;
    compute3out = 0;
    zone3Timer.stop();
    zone3Timer.reset();
}

void SprinklerHandler::turnOffZone4( void ) {
    zone4Timeout.detach();
    zone4Interval = 0;
    compute4out = 0;
    zone4Timer.stop();
    zone4Timer.reset();
}