//Filename: modify.c
//Developer: Jay Suttiruttana

#include "btree.h"

/********************************************
getRecord:
    Prompts user for remaining arguments
********************************************/
void getRecord(Record_type *record) {
	
	int   field, j, n,ha, i;
	char ch;
	char newfield[15]={0};

printf ("\nPlease specify the field to modify (Enter 1 - 6)");
printf ("\n[1]Ryom");
printf ("\n[2]Fanna");
printf ("\n[3]Pincherle");
printf ("\n[4]Type");
printf ("\n[5]Key");
printf ("\n[6]Opus Number\n");
scanf ("%d", &field);
printf ("\nEnter the new data:  ");
getchar();


if (field==1) n= 6;
else if (field==2) n = 9;
else if (field==3) n = 12;
else if (field==4) n = 11;
else if (field==5) n = 14;
else if (field==6) n = 12;
for( j = 0; (j < n) &&  ((ch = getchar()) != EOF) && (ch != '\n'); j++ )
      newfield[j] = ch;
for ( ha=j; ha<n; ha++)
newfield [ha] = ' ';
//newfield[ha] ='\0';
		
		

switch (field)
{
case 1:
	{
		
	strcpy (record->RYOM, newfield);
	
	break;
	}
case 2:
	{
			
	
for (i =0; i <9; i++)
	
record->FANNA[i+1] = newfield[i];
	
record->FANNA[9] = '\0';
	break;
	}
case 3:
	{
	
	
for (i =0; i <12; i++)
	
record->PINCHERLE[i+2] = newfield[i];
	
record->PINCHERLE[12] = '\0';
	break;
	}
case 4:
	{
	
	
for (i =0; i <11; i++)
	
record->TYPE[i+3] = newfield[i];
	
record->TYPE[11] = '\0';
	break;
	}
case 5:
	{
	
for (i =0; i <11; i++)
	
record->MUS_KEY[i+4] = newfield[i];
	
record->MUS_KEY[11] = '\0';

	break;
	}
case 6:
	{
	for (i =0; i <13; i++)
	
record->OPUS_NUMBER[i+4] = newfield[i];
	
record->OPUS_NUMBER[13] = '\0';
	
	break;
	}
}



 return;

}


void main(int argc, char *argv[])
{
	page_type page;
	Record_type record;
	int  found_pos, found_rrn;
	int  root, rec_rrn,key;

	if (argc !=2) Error("You must enter a RICORDI Number.");

	btopen();
	dta_open();

	root = getroot();
	key = atoi (argv[1]);
	if( !btsearch(root, key, &found_rrn, &found_pos) )
		Error("KEY not found."); 	/* Search B-Tree for key number       */

	btread(found_rrn, &page);           	/* Read in page containing key number */

	rec_rrn = page.item[found_pos].rec_rrn; /* Retrieve record from datafile using */
	record = RetrievRec(rec_rrn);       	/* the record RRN stored with the key  */

	getRecord(&record);                  	/* Give price quote to user            */

   	save_record(rec_rrn, record);        	/* Write record to datafile             */

	dta_close();
	btclose();
}