/*
* main
* class: None
*/
int main(int argc, char **argv) {
Manager m; // The todo list manager.
string homedir = getenv("HOME");
string filename = homedir+"/todo.txt"; // default file
bool invalidArgs = argc < 2;
bool parsing = true; // Whether it's still parsing argument
int command = -1; // The switch code for command
int subCom = -1; // The switch code for sub commands.
int comInd = -1; // The index of the command in argv
int ac = -1; // number of arguments for a command
int task = -1; // The task number being amended.
int x = -1, y = -1; // Hold argument values.
ifstream fin; // The input filestream
ofstream fout; // The output filestream.
// scan the command line arguments
for(int i = 1; i < argc && !invalidArgs && parsing; ++i) {
string s = argv[i];
// determine what type of argument it is
if(s[0] == '-') {
// option
// check if it has the necessary arguments given
// set the associated flags
if(s.compare("-f") == 0 || s.compare("--file") == 0) {
// check if there is another argument, which should be the file
// name.
if(1 < (argc-i)) {
filename = argv[i+1];
i++;
}
else {
invalidArgs = true;
}
}
else {
// There are no other options I recognize at the moment.
invalidArgs = true;
}
}
else {
// it's a command
parsing = false;
comInd = i;
ac = (argc - comInd - 1);
if(s.compare("add") == 0) {
command = ADD;
}
else if(s.compare("amend") == 0) {
command = AMEND;
}
else if(s.compare("demote") == 0) {
command = DEMOTE;
}
else if(s.compare("help") == 0) {
command = HELP;
}
else if(s.compare("list") == 0) {
command = LIST;
}
else if(s.compare("promote") == 0) {
command = PROMOTE;
}
else if(s.compare("remove") == 0) {
command = REMOVE;
}
else if(s.compare("swap") == 0) {
command = SWAP;
}
else if(s.compare("top") == 0) {
command = TOP;
}
else {
invalidArgs = true;
}
}
}
if(invalidArgs) {
displayHelp(cout);
exit(1);
}
fin.open(filename.c_str());
m.read(fin);
fin.close();
// read in the file.
// do the command
switch(command) {
case ADD:
if(0 < ac) {
Task t;
t.setTitle(argv[comInd+1]);
for(int i = comInd+2; i < argc; ++i) {
t.addItem(argv[i]);
}
m.addTask(t);
fout.open(filename.c_str());
m.write(fout);
fout.close();
}
else {
cout << "Invalid number of arguments." << endl;
exit(1);
}
break;
case AMEND:
if(ac < 3) {
cout << "Not enough arguments given." << endl;
exit(1);
}
if(!isNumeric(argv[comInd+1])) {
cout << "Non-numeric value given for the task number." << endl;
exit(1);
}
task = atoi(argv[comInd+1]);
// determine what changes is actually going to be made.
// add item, remove item, change item, change title.
if(strcmp(argv[comInd+2],"add") == 0 ) {
for(int i = comInd+3; i < argc; ++i) {
m.addItem(task,argv[i]);
}
}
else if(strcmp(argv[comInd+2],"mod")==0) {
if(!isNumeric(argv[comInd+3])) {
cout << "Non-numeric value given for item index." << endl;
exit(1);
}
if(ac < 4) {
cout << "Not enough arguments given." << endl;
exit(1);
}
y = atoi(argv[comInd+3]);
if(!m.setItem(task,y,argv[comInd+4])) {
cout << "An error occured." << endl;
exit(1);
}
}
else if(strcmp(argv[comInd+2],"promote")==0) {
// Attempt to promote a subitem
if(ac < 4) {
cout << "Not enough arguments given to promote item.\n";
}
// check that the two arguments given are numeric
if(!isNumeric(argv[comInd+3]) || !isNumeric(argv[comInd+4])) {
cout << "Non-numeric arguments given for promotion.\n";
}
x = atoi(argv[comInd+3]);
y = atoi(argv[comInd+4]);
m.promoteItem(task,x,y);
}
else if(strcmp(argv[comInd+2],"demote")==0) {
// Attempt to demote a subitem
if(ac < 4) {
cout << "Not enough arguments given to demote item.\n";
}
// check that the two arguments given are numeric
if(!isNumeric(argv[comInd+3]) || !isNumeric(argv[comInd+4])) {
cout << "Non-numeric arguments given for demotion.\n";
}
x = atoi(argv[comInd+3]);
y = atoi(argv[comInd+4]);
m.demoteItem(task,x,y);
}
else if(strcmp(argv[comInd+2],"remove")==0) {
if(!isNumeric(argv[comInd+3])) {
cout << "Non-numeric value given for the item." << endl;
exit(1);
}
m.removeItem(task,atoi(argv[comInd+3]));
}
else if(strcmp(argv[comInd+2],"rename")==0) {
// Attempt to set the title
if(!m.setTitle(task,argv[comInd+3])) {
cout << "An error has occured." << endl;
exit(1);
}
}
fout.open(filename.c_str());
m.write(fout);
fout.close();
break;
case DEMOTE:
if(ac != 2) {
cout << "Invalid number of arguments." << endl;
exit(1);
}
if(!isNumeric(argv[comInd+1]) && !isNumeric(argv[comInd+2])) {
cout << "Non-numeric argument given." << endl;
exit(1);
}
x = atoi(argv[comInd+1]);
y = atoi(argv[comInd+2]);
m.demote(x,y);
fout.open(filename.c_str());
m.write(fout);
fout.close();
break;
case HELP:
// Display a simple help message
// Eventually this should parse argument passed to display
// information about as specific command.
displayHelp(cout);
break;
case LIST:
// there are several options for this.
// If there is no arguments past the command, it will list
// everything. If there is one it will only list that one. If there
// are two it will list an inclusive range.
switch(ac) {
case 0:
cout << m;
break;
case 1:
if(isNumeric(argv[comInd+1])) {
x = atoi(argv[comInd+1]);
if(0 <= x && x < m.getNumberOfTasks()) {
cout << "(" << x << ")" << m.getTask(x) << endl;
}
else {
cout << "Error. Task does not exist." << endl;
exit(1);
}
}
else {
cout << "Non numeric argument given for list." << endl;
exit(1);
}
break;
case 2:
if(isNumeric(argv[comInd+1]) && isNumeric(argv[comInd+2])){
x = atoi(argv[comInd+1]);
y = atoi(argv[comInd+2]);
if(0 <= x && x < y) {
for(int i = x; i <= y && i < m.getNumberOfTasks(); ++i){
cout << "(" << i << ")" << m.getTask(i) << endl;
}
}
}
else {
cout << "Non numeric argument given for list." << endl;
exit(1);
}
break;
default:
displayHelp(cout);
exit(1);
break;
}
break;
case PROMOTE:
if(ac < 1) {
// display the help
cout << "Wrong number of arguments given." << endl;
exit(1);
}
if(!isNumeric(argv[comInd+1]) && !isNumeric(argv[comInd+2])) {
cout << "Non-numeric argument given." << endl;
exit(1);
}
x = atoi(argv[comInd+1]); // The item being promoted
if( ac == 1) {
y = 1; // promote the item by only one
}
else {
y = atoi(argv[comInd+2]);
}
m.promote(x,y);
fout.open(filename.c_str());
m.write(fout);
fout.close();
break;
case REMOVE:
// Remove the nth task.
if(ac < 1) {
cout << "Not enough arguments given." << endl;
exit(1);
}
if(!isNumeric(argv[comInd+1])) {
cout << "Non-numeric argument given." << endl;
exit(1);
}
x = atoi(argv[comInd+1]);
m.removeTask(x);
fout.open(filename.c_str());
m.write(fout);
fout.close();
break;
case SWAP:
// Swap the priorty/position of two tasks.
if(ac != 2) {
cout << "Wrong number of arguments given." << endl;
exit(1);
}
if(!isNumeric(argv[comInd+1]) && !isNumeric(argv[comInd+2])) {
cout << "Non-numeric argument given." << endl;
exit(1);
}
x = atoi(argv[comInd+1]);
y = atoi(argv[comInd+2]);
m.swapTasks(x,y);
fout.open(filename.c_str());
m.write(fout);
fout.close();
break;
case TOP:
// Display the top (n) tasks.
if(ac == 0) {
// display the top task
cout << "(0) " << m.getTask(0) << endl;
}
else {
// display the top n tasks
if(!isNumeric(argv[comInd+1])) {
cout << "Non-numeric argument given." << endl;
exit(1);
}
x = atoi(argv[comInd+1]);
for(int i = 0; i < x; ++i) {
cout << "(" << i << ") " << m.getTask(i) << endl;
}
}
break;
default:
displayHelp(cout);
exit(1);
break;
}
return 0;
}
