115 lines
4.1 KiB
C++
115 lines
4.1 KiB
C++
/**
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* @file tabble.cpp
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* @author Miguel Muniz
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* @brief file for table.cpp contains the function definitions for the table class
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* @version 3.0
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* @date 2023-04-24
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*/
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#include "SQLManager.h"
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#include <iostream>
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#include <filesystem>
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#include <fstream>
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#include <sstream>
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#include <string>
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#include <vector>
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using namespace std;
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namespace fs = std::filesystem;
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void Table::CreateTB(string tb_name, string data_type){
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//string path = program_path /= tb_name;
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string pathInital = program_path; //saves initial program path
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if (fs::exists(program_path) && fs::is_regular_file(tb_name + ".csv")) { //fix this
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cout << "!Failed to create table " << tb_name << " because it already exists." << endl;
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} else {
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//cout << "program_path: " << program_path << "/" << endl;
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//program_path /= tb_name;
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string path = program_path /= tb_name;
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//cout << "path: " << path << endl;
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ofstream newTable(path + ".csv");
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cout << "Table " << tb_name << " created." << endl;
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newTable << data_type << endl;
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newTable.close();
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program_path = pathInital; //resets program path to initial path
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}
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}
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void Table::DropTB(string tb_name){
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//cout << "program_path: " << program_path << tb_name << ".csv"<< endl;
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//cout << program_path/=tb_name + ".csv" << endl;
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string pathInital = program_path; //saves initial program path
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if (fs::exists(program_path/=tb_name + ".csv")) {
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fs::remove(program_path);
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cout << "Table " << tb_name << " deleted." << endl;
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} else {
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cout << "!Failed to drop table " << tb_name << " because it does not exist." << endl;
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}
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program_path = pathInital; //resets program path to initial path
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}
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void Table::SelectTB(string tb_name){
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//cout << "program_path: " << program_path << endl;
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string pathInital = program_path; //saves initial program path
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if (fs::exists(program_path/=tb_name + ".csv")) {
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string line;
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ifstream table(program_path); //opens the file
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if (table.is_open()) {
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while (getline(table, line)) {
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stringstream ss(line);
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string field;
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while (getline(ss, field, ',')) {
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cout << field << "|";
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}
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cout << endl;
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}
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table.close();
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}
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} else {
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cout << "!Failed to select table " << tb_name << " because it does not exist." << endl;
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}
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program_path = pathInital; //resets program path
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}
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void Table::AppendTB(string tb_name, string columnInput, string data_typeInput){ //adds column to table by coppying from old csv, appending to new csv, then replacing old csv.
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//cout << "program_path: " << program_path << endl;
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string pathInital = program_path; //saves initial program path
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program_path_copy = program_path; //saves initial program path to copy
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//cout << "program_path_temp: " << pathTemp << endl;
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if (fs::exists(program_path/=tb_name + ".csv")) {
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string line;
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int currentLine = 1;
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string combine;
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ifstream table(program_path);
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string pathTemp = program_path_copy/=tb_name + "_temp.csv";
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//cout << "program_path_temp: " << pathTemp << endl;
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ofstream outfile(pathTemp, ios::app); //append to file ios::app
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//cout << program_path << endl;
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while (getline(table, line)) {
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if (currentLine == 1){ //grabs data from the second line of the csv
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stringstream ss(line);
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combine = "," + columnInput + " " + data_typeInput;
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line += combine; //adds column name to the end of the line
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outfile << line << endl; //writes to new csv
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}
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currentLine++;
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}
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table.close();
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rename(program_path_copy.c_str(), program_path.c_str()); //replace file
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cout << "Table " << tb_name << " modified." << endl;
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outfile.close();
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} else {
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cout << "!Failed to select table " << tb_name << " because it does not exist." << endl;
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}
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program_path = pathInital; //resets program path
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}
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