src files added

src/main.cpp

@@ -0,0 +1,48 @@
+#include <cstdio>
+#include <string>
+#include "todo.hpp"
+#include <cstring>
+
+#define HELP_MSG "press -a to add the task\npress -d to delete the task\npress -l for list of tasks\npress -h for help\n"
+
+int main(int argc, char const *argv[])
+{   
+    // printf("You entered %d arguments\n", argc -1);
+
+
+    if (argc < 2) {
+        printf(HELP_MSG);
+            //   exit(1);
+    }
+    else {
+    for (int i = 1; i < argc; ++i){
+        if (strcmp(argv[i],"-h")==0){
+
+            printf(HELP_MSG);
+        }
+        else if (strcmp(argv[i],"-a")==0){
+            todo::Todo obj(todo::FileType::APPEND);
+
+
+            printf("adding the todo to file\n");
+            obj.saveTodo(argv[i+1]);
+        }
+        else if (strcmp(argv[i],"-l")==0){
+            todo::Todo obj(todo::FileType::READ);
+            printf("list of todos\n");
+            obj.listTodo();
+        }
+
+        else if (strcmp(argv[i],"-d")==0){
+
+            int index = static_cast<int>(*argv[i+1] - '0');
+
+            printf("todo removed\n");
+            todo::Todo obj(todo::FileType::WRITE);
+            obj.deleteTodo(index);
+        }
+
+    }
+}    
+    return 0;
+}

src/todo.cpp

@@ -0,0 +1,60 @@
+#include "todo.hpp"
+todo::Todo::Todo(FileType fileType) {
+    switch (fileType)
+    {
+    case APPEND:
+        file.open(FILE_NAME,std::ios_base::app);
+        break;
+
+    case READ:
+        file.open(FILE_NAME,std::ios_base::in);
+        break;
+
+    case WRITE:
+        file.open(FILE_NAME,std::ios_base::out);
+        break;
+
+    default:
+        break;
+    }
+    if(!file){
+        printf("failed to open file\n");
+        exit(1);
+    }
+};
+todo::Todo::~Todo() {
+    file.close();
+};
+
+void todo::Todo::saveTodo(const char* value) {
+    file << value << "\n";
+};
+
+void todo::Todo::listTodo(){
+    if (file.is_open()){
+        index=0;
+        while (std::getline(file,line)){
+            ++index;
+            printf("%d. %s\n",index, line.c_str());
+        }
+    }
+}
+
+void todo::Todo::deleteTodo(int index){
+    std::string line;
+
+
+    int _index = 0;
+    while (std::getline(file,line)){
+        ++_index;
+        if (_index == index){
+            line.replace(line.begin(),line.end(), "ok");
+            printf("%s\n", line.c_str());
+            printf("done\n");
+
+            // file << line << "\n";
+        }
+
+    }
+
+}

src/todo.hpp

@@ -0,0 +1,27 @@
+#pragma once
+
+
+#include <iostream>
+#include <fstream>
+
+#define FILE_NAME "/home/hunter/zzzzz/cpp/learn/applications/todo/todo.txt"
+
+namespace todo {
+    enum FileType {READ, WRITE, APPEND};
+    class Todo {
+        public:
+            Todo(FileType fileType);
+            ~Todo();
+            void saveTodo(const char* value);
+            void listTodo();
+            void deleteTodo(int index);
+        private:
+            std::fstream file;
+            std::string line;
+            int index;
+
+
+
+
+    };
+}