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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <netinet/in.h>
#include <netdb.h>
#include <signal.h>
#include <syslog.h>
#include <time.h>
#include "common.h"
#include "db.h"
int evaluate_LAST(float *last,int itemid,int parameter)
{
DB_RESULT *result;
char c[1024];
char *field;
sprintf(c,"select lastvalue from items where itemid=%d and lastvalue is not null", itemid );
result = DBselect(c);
if(result==NULL)
{
DBfree_result(result);
return FAIL;
}
if(DBnum_rows(result)==0)
{
DBfree_result(result);
return FAIL;
}
field = DBget_field(result,0,0);
if( field == NULL )
{
DBfree_result(result);
return FAIL;
}
*last=atof(field);
DBfree_result(result);
return SUCCEED;
}
int evaluate_MIN(float *min,int itemid,int parameter)
{
DB_RESULT *result;
char c[1024];
char *field;
int now;
now=time(NULL);
sprintf(c,"select min(value) from history where clock>%d-%d and itemid=%d",now,parameter,itemid);
result = DBselect(c);
if(result==NULL)
{
syslog(LOG_NOTICE, "Result for MIN is empty" );
DBfree_result(result);
return FAIL;
}
if(DBnum_rows(result)==0)
{
syslog( LOG_NOTICE, "Result for MIN is empty" );
DBfree_result(result);
return FAIL;
}
field = DBget_field(result,0,0);
if( field == NULL )
{
syslog( LOG_NOTICE, "Result for MIN is empty" );
DBfree_result(result);
return FAIL;
}
*min=atof(field);
DBfree_result(result);
return SUCCEED;
}
int evaluate_MAX(float *max,int itemid,int parameter)
{
DB_RESULT *result;
char c[1024];
char *field;
int now;
now=time(NULL);
sprintf(c,"select max(value) from history where clock>%d-%d and itemid=%d",now,parameter,itemid);
result = DBselect(c);
if(result==NULL)
{
DBfree_result(result);
return FAIL;
}
if(DBnum_rows(result)==0)
{
DBfree_result(result);
return FAIL;
}
field = DBget_field(result,0,0);
if( field == NULL )
{
DBfree_result(result);
return FAIL;
}
*max=atof(field);
DBfree_result(result);
return SUCCEED;
}
int evaluate_PREV(float *prev,int itemid,int parameter)
{
DB_RESULT *result;
char c[1024];
char *field;
sprintf(c,"select prevvalue from items where itemid=%d and prevvalue is not null", itemid );
result = DBselect(c);
if(result==NULL)
{
DBfree_result(result);
return FAIL;
}
if(DBnum_rows(result)==0)
{
DBfree_result(result);
return FAIL;
}
field = DBget_field(result,0,0);
if( field == NULL )
{
DBfree_result(result);
return FAIL;
}
*prev=atof(field);
DBfree_result(result);
return SUCCEED;
}
int evaluate_DIFF(float *diff,int itemid,int parameter)
{
float prev,last;
float tmp;
if(evaluate_PREV(&prev,itemid,parameter) == FAIL)
{
return FAIL;
}
if(evaluate_LAST(&last,itemid,parameter) == FAIL)
{
return FAIL;
}
tmp=last-prev;
if((tmp<0.000001)&&(tmp>-0.000001))
{
*diff=0;
}
else
{
*diff=1;
}
return SUCCEED;
}
int evaluate_NODATA(float *nodata,int itemid,int parameter)
{
DB_RESULT *result;
char c[1024];
char *field;
int now;
now=time(NULL);
sprintf(c,"select value from history where itemid=%d and clock>%d-%d limit 1",itemid,now,parameter);
result = DBselect(c);
if(result==NULL)
{
DBfree_result(result);
return FAIL;
}
if(DBnum_rows(result)==0)
{
DBfree_result(result);
return FAIL;
}
field = DBget_field(result,0,0);
*nodata=0;
if( field == NULL )
{
*nodata=1;
}
DBfree_result(result);
return SUCCEED;
}
int update_functions( int itemid )
{
FUNCTION function;
DB_RESULT *result;
char c[1024];
float value;
int ret=SUCCEED;
int i,rows;
sprintf(c,"select function,parameter from functions where itemid=%d group by 1,2 order by 1,2",itemid );
result = DBselect(c);
if(result==NULL)
{
syslog( LOG_NOTICE, "No functions to update.");
DBfree_result(result);
return SUCCEED;
}
rows=DBnum_rows(result);
if(rows == 0)
{
syslog( LOG_NOTICE, "No functions to update.");
DBfree_result(result);
return SUCCEED;
}
for(i=0;i<rows;i++)
{
function.function=DBget_field(result,i,0);
function.parameter=atoi(DBget_field(result,i,1));
syslog( LOG_DEBUG, "ItemId:%d Evaluating %s(%d)\n",itemid,function.function,function.parameter);
if(strcmp(function.function,"last")==0)
{
ret = evaluate_LAST(&value,itemid,function.parameter);
}
else if(strcmp(function.function,"prev")==0)
{
ret = evaluate_PREV(&value,itemid,function.parameter);
}
else if(strcmp(function.function,"nodata")==0)
{
ret = evaluate_NODATA(&value,itemid,function.parameter);
}
else if(strcmp(function.function,"min")==0)
{
ret = evaluate_MIN(&value,itemid,function.parameter);
}
else if(strcmp(function.function,"max")==0)
{
ret = evaluate_MAX(&value,itemid,function.parameter);
}
else if(strcmp(function.function,"diff")==0)
{
ret = evaluate_DIFF(&value,itemid,function.parameter);
}
else
{
syslog( LOG_WARNING, "Unknown function:%s\n",function.function);
DBfree_result(result);
return FAIL;
}
syslog( LOG_DEBUG, "Result:%f\n",value);
if (ret == SUCCEED)
{
sprintf(c,"update functions set lastvalue=%f where itemid=%d and function='%s' and parameter=%d", value, itemid, function.function, function.parameter );
// printf("%s\n",c);
DBexecute(c);
}
}
DBfree_result(result);
return ret;
}
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