/************************************************************************
* int room_index Identifies the room to add connection(s) to.
* char* rooms[] Array of room names, each to correspond to a file.
* int connections Total number of connections the room
* identified by room_index should have.
***********************************************************************/
void initRoom(int room_index, char* rooms[], int connections, char* directory ) {
char *room_name = rooms[room_index];
FILE *file_p = NULL;
// need to open in directory, so craft the string here
char room_dir[100] = "";
strcat_safe( room_dir, 100, directory );
strcat_safe( room_dir, 100, "/" );
strcat_safe( room_dir, 100, rooms[room_index] );
file_p = fopen( room_dir, "a+" );
// Check for successful file opening.
if ( ! file_p ) {
printf( "Error opening file in function initRoom!\n" );
exit( 1 );
}
int connections_in_file = countConnections( file_p );
int connections_to_make = connections - connections_in_file;
while ( connections_to_make > 0 ) {
int rand_index = randInRange( 0, 6 );
if ( makeConnection( room_index, rand_index, rooms, directory, file_p ) ) {
connections_to_make--;
}
}
fclose(file_p);
}
void listLocations( char *room, char *directory ) {
char other_1[100] = "";
char other_1a[100] = "";
char name[100] = "";
char path[100] = "";
// prepare directory string
strcat_safe( path, 100, directory );
strcat_safe( path, 100, "/" );
strcat_safe( path, 100, room );
FILE *file = fopen( path, "a+" );
int connections = countConnections( file ) - 1; // countConnections actually counts the number of lines in file - 1
fseek( file, 0, SEEK_SET );
int count = 0;
printf( "POSSIBLE CONNECTIONS: " );
while( fscanf( file, "%s %s %s\n", other_1, other_1a, name ) == 3 ) {
if ( ! strcmp( other_1, "CONNECTION" ) ) {
printf( "%s", name );
if (count + 1 < connections)
printf( ", " );
count++;
}
}
printf( ".\n" );
fclose( file );
}
/******************************************************************************
* Checks to see whether the two rooms identified by index are the same,
* and returns 0 if they are (avoiding a room making a connection to itself).
*
* If the two rooms identified are different, a connection will be made
* between them unless the connection already exists.
*****************************************************************************/
int makeConnection( int first, int second, char* rooms[], char* directory, FILE* first_room_file ) {
if ( first == second )
return 0;
// get room names
char *first_room = rooms[first];
char *second_room = rooms[second];
// reserve room for file path strings
char second_dir[100] = "";
strcat_safe( second_dir, 100, directory );
strcat_safe( second_dir, 100, "/" );
strcat_safe( second_dir, 100, second_room );
// Open room files for reading and writing
FILE *second_room_file = fopen( second_dir, "a+" );
if ( ! ( first_room_file && second_room_file ) ) {
printf( "in makeConnection: second_dir: %s\n", second_dir );
printf( "Error opening file in function makeConnection\n" );
exit( 1 );
}
if ( connectionExists( first_room_file, second_room_file, first_room, second_room ) ) {
return 1;
}
int c1 = countConnections( first_room_file ) + 1;
int c2 = countConnections( second_room_file ) + 1;
fprintf( first_room_file, "CONNECTION %d: %s\n", c1, second_room );
fprintf( second_room_file,"CONNECTION %d: %s\n", c2, first_room );
// Close only the file this function opened
fclose( second_room_file );
return 1;
}
void selectRole() {
int nConnection = countConnections();
if(nConnection==2) {
printf("%s: I am the Center\n",moduleName);
role = CENTER;
int i, count=0;
for(i=0;i<8;i++) {
if(atronApi_isOtherConnectorNearby(i)) {
char leftMsg[] = {ROLESET, LEFT};
if(count==0) atronApi_sendMessage(leftMsg, 2, i); //select left
char rightMsg[] = {ROLESET, RIGHT};
if(count==1) atronApi_sendMessage(rightMsg, 2, i); //select right
count++;
}
}
}
while(role==UNDEFINED) { atronApi_yield(); }
}