saurav_oopsTask.html

<script>
	class ProductModel {
		prod_id;
		prod_name;

		constructor(prod_id, prod_name) {
			this.prod_id = prod_id;
			this.prod_name = prod_name;
		}
	}

	class LocalStorage {
		localStorage_setitem(list) {
			localStorage.setItem("Product", JSON.stringify(list));
		}

		localStorage_getitem() {
			if (localStorage.getItem("Product") == null) {
				var list = [];
				var pId = 1;
			} else {
				var list = JSON.parse(localStorage.getItem("Product"));
				var pId = list[list.length - 1].prod_id + 1;
			}
			return [list, pId];
		}
	}

	class IdSearch {
		idSearch(index, list, key) {
			//-------------------------------Id Search--------------------------------------
			var flag = -1;
			for (var i of list) {
				if (index == i[key]) {
					flag = i;
					break;
				}
			}
			return flag;
		}
	}

	class ViewProduct {
		viewProduct(list, start, output) {
			//-------------------------------View Product--------------------------------------
			output +=
				"Product Id: " +
				list[start].prod_id +
				" - " +
				"Product Name: " +
				list[start].prod_name +
				"\n";

			if (start < list.length - 1) {
				start++;
				output = this.viewProduct(list, start, output);
			}

			return output;
		}
	}

	class DeleteProduct extends ViewProduct {
		deleteProduct(list) {
			//------------------------Delete Product---------------------------------
			alert(this.viewProduct(list, 0, ""));

			var deleteId = parseInt(
				prompt("Enter the Product id you want to Update: ")
			);

			var searchId = new IdSearch();
			var flag = searchId.idSearch(deleteId, list, "prod_id");

			if (flag == -1) {
				alert("Invalid Product Id !!!");
			} else {
				list.splice(flag.prod_id - 1, 1);
				var local = new LocalStorage();
				local.localStorage_setitem(list);
				alert("Product data deleted successfully !!!");
				alert(this.viewProduct(list, 0, ""));
			}
			return list;
		}
	}

	class DeleteData extends DeleteProduct {
		deleteData(list) {
			// ------------------------------Delete Function-----------------------------------
			var deleteChoice = parseInt(
				prompt("Which data you want to Delete: \n1. Product \n2. Exit")
			);

			switch (deleteChoice) {
				case 1:
					list = this.deleteProduct(list);
					break;

				case 2:
					alert("Thank you!");
					return;
					break;

				default:
					alert("Please select appropriate choice. Thank You!");
					break;
			}
			this.deleteData(list);
		}
	}

	class UpdateProduct extends ViewProduct {
		updateProduct(list) {
			//-------------------------------Update Product--------------------------------------
			var updateChoice = parseInt(
				prompt("What do you want to Update? : \n1. Product Name")
			);

			switch (updateChoice) {
				case 1:
					//------------------------Update Product Name---------------------------------
					alert(this.viewProduct(list, 0, ""));

					var updateId = parseInt(
						prompt("Enter the Product id you want to Update: ")
					);

					var searchId = new IdSearch();
					var flag = searchId.idSearch(updateId, list, "prod_id");

					if (flag == -1) {
						alert("Invalid Product Id !!!");
					} else {
						flag.prod_name = prompt("Enter new Product Name: ");
						var local = new LocalStorage();
						local.localStorage_setitem(list);

						alert("Product Name updated successfully !!!");
						alert(this.viewProduct(list, 0, ""));
					}
					break;

				default:
					alert("Please select appropriate choice. Thank You!");
					break;
			}
			return list;
		}
	}

	class UpdateData extends UpdateProduct {
		updateData(list) {
			// ------------------------------Update Function-----------------------------------
			var updateChoice = parseInt(
				prompt("Which data you want to Update: \n1. Product \n2. Exit")
			);

			switch (updateChoice) {
				case 1:
					list = this.updateProduct(list);
					break;

				case 2:
					alert("Thank you!");
					return;
					break;

				default:
					alert("Please select appropriate choice. Thank You!");
					break;
			}
			this.updateData(list);
		}
	}

	class SearchProduct extends IdSearch {
		searchProduct(list) {
			//-------------------------------Search Product--------------------------------------
			var searchChoice = parseInt(
				prompt(
					"Enter your Search choice: \n1. Search by Product Id \n2. Search by Product Name"
				)
			);
			switch (searchChoice) {
				case 1:
					//-------------------------Search by Product Id---------------------------------
					var searchId = parseInt(
						prompt("Enter the Product id you want to search: ")
					);
					var flag = this.idSearch(searchId, list, "prod_id");

					if (flag == -1) {
						alert("Invalid Product Id !!!");
					} else {
						alert(
							"Product Id: " +
								flag.prod_id +
								" - " +
								"Product Name: " +
								flag.prod_name +
								"\n"
						);
					}
					break;

				case 2:
					//------------------------Search by Product Name---------------------------------
					var searchName = prompt(
						"Enter the Product Name you want to search: "
					);
					var flag = -1;
					for (var i of list) {
						if (searchName == i.prod_name) {
							flag = i;
							break;
						}
					}
					if (flag == -1) {
						alert("Invalid Product Name !!!");
					} else {
						alert(
							"Product Id: " +
								flag.prod_id +
								" - " +
								"Product Name: " +
								flag.prod_name +
								"\n"
						);
					}
					break;

				default:
					alert("Enter appropriate Search choice !!!");
					break;
			}
		}
	}

	class SearchData extends SearchProduct {
		searchData(list) {
			// ------------------------------Search Function-----------------------------------
			var searchChoice = parseInt(
				prompt("What you want to Search: \n1. Product \n2. Exit")
			);

			switch (searchChoice) {
				case 1:
					this.searchProduct(list);
					break;

				case 2:
					alert("Thank you!");
					return;
					break;

				default:
					alert("Please select appropriate choice. Thank You!");
					break;
			}
			this.searchData(list);
		}
	}

	class ViewData extends ViewProduct {
		viewData(list) {
			// ------------------------------View Function-----------------------------------
			var viewChoice = parseInt(
				prompt("What you want to View: \n1. Product List \n2. Exit")
			);

			switch (viewChoice) {
				case 1:
					alert(this.viewProduct(list, 0, ""));
					break;

				case 2:
					alert("Thank you!");
					return;
					break;

				default:
					alert("Please select appropriate choice. Thank You!");
					break;
			}
			this.viewData(list);
		}
	}

	class InsertProduct extends ProductModel {
		// constructor(prod_id, prod_name){
		// 	super(prod_id, prod_name);
		// }

		insertProduct(list, id) {
			//-------------------------------Insert Product--------------------------------------

			var productName = prompt("Enter Product Name:");

			var dummy = new ProductModel(id, productName);
			list.push(dummy);

			var local = new LocalStorage();
			local.localStorage_setitem(list);

			alert("Product added successfully !!!");
			return list;
		}
	}

	class InsertData extends InsertProduct {
		insertData(list, id) {
			// ------------------------------Insert Function-----------------------------------
			var insertChoice = parseInt(
				prompt("What you want to Insert: \n1. Product \n2. Exit")
			);

			switch (insertChoice) {
				case 1:
					list = this.insertProduct(list, id);
					break;

				case 2:
					alert("Thank you!");
					return;
					break;

				default:
					alert("Please select appropriate choice. Thank You!");
					break;
			}
			this.insertData(list, id);
		}
	}

	class MainClass {
		main(list, id) {
			// -----------------------------------Main Function----------------------------
			var choice = parseInt(
				prompt(
					"Enter your choice: \n1. Insert \n2. View \n3. Search \n4. Update \n5. Delete \n6. Exit"
				)
			);

			switch (choice) {
				case 1:
					var dataInsert = new InsertData();
					dataInsert.insertData(list, id++);
					break;

				case 2:
					var dataView = new ViewData();
					dataView.viewData(list);
					break;

				case 3:
					var dataSearch = new SearchData();
					dataSearch.searchData(list);
					break;

				case 4:
					var dataUpdate = new UpdateData();
					dataUpdate.updateData(list);
					break;

				case 5:
					var dataDelete = new DeleteData();
					dataDelete.deleteData(list);
					break;

				case 6:
					alert("Thank you! for visiting our system...");
					return;
					break;

				default:
					alert("Please select appropriate choice. Thank You!");
					break;
			}
			this.main(list, id);
		}
	}

	//  The data is stored in this fashion "[ {_, _},{}";
	// [ product]
	// var db = [];
	// localStorage.clear();

	var local = new LocalStorage();
	var db = local.localStorage_getitem();
	var task = new MainClass();
	task.main(db[0], db[1]);
</script>