// https://stackoverflow.com/questions/4014827/how-can-i-compare-strings-in-c-using-a-switch-statement

#define LS 5862500
#define CD 5862188
#define MKDIR 228239964
#define PWD 193467056

const unsigned long hash(const char *str) {
  unsigned long hash = 5381;
  int c;
  while ((c = *str++))
    hash = ((hash << 5) + hash) + c;
  return hash;
}


void parseInput(const String& input) {
  unsigned long hashed = hash(input.c_str());
  Serial.println(hashed);
  switch (hashed) {
    case LS:
      Serial.println("Running ls...");
      break;
    case CD:
      Serial.println("Running cd...");
      break;
    case MKDIR:
      Serial.println("Running mkdir...");
      break;
    case PWD:
      Serial.println("Running pwd...");
      break;
    default:
      Serial.println("Not a valid command.");
  }
}

void setup() {
  Serial.begin(115200);
  Serial.println("Type a command: ");
}

void loop() {
  if (Serial.available()) {
    String msg = Serial.readStringUntil('\n');
    parseInput(msg);
  }

}