Add console app code

student-Records-console-app/mongoCXXConsoleApp.cpp

@@ -0,0 +1,276 @@
+#pragma once
+
+#include <mongocxx/client.hpp>
+#include <bsoncxx/builder/stream/document.hpp>
+#include <bsoncxx/json.hpp>
+#include <mongocxx/uri.hpp>
+#include <mongocxx/instance.hpp>
+
+#include <algorithm>
+#include <iostream>
+#include <vector>
+
+using namespace std;
+// Add URI inside the curly braces in below line.  
+static const mongocxx::uri s_Cluster0_uri = mongocxx::uri{ /*Add Uri here ---> */"" };
+
+
+// ********************************************** Database Methods **********************************************
+
+// Get all the databases from a given client.
+vector<string> getDatabases(mongocxx::client& client)
+{
+	return client.list_database_names();
+}
+
+
+// ********************************************** Collection Methods **********************************************
+
+// Create a new collection in the given database.
+void createCollection(mongocxx::database& db, const string& collectionName)
+{
+	db.create_collection(collectionName);
+}
+
+// Print the contents of the given collection.
+void printCollection(mongocxx::collection& collection)
+{
+	// Check if collection is empty.
+	if (collection.count_documents({}) == 0)
+	{
+		cout << "Collection is empty." << endl;
+		return;
+	}
+
+	auto cursor = collection.find({});
+
+	for (auto&& doc : cursor)
+	{
+		cout << bsoncxx::to_json(doc) << endl;
+	}
+}
+
+// ********************************************** Document Methods **********************************************
+
+// Create a document from the given key-value pairs.
+bsoncxx::document::value createDocument(const vector<pair<string, string>>& keyValues)
+{
+	bsoncxx::builder::stream::document document{};
+
+	for (auto& keyValue : keyValues)
+	{
+		document << keyValue.first << keyValue.second;
+	}
+
+	return document << bsoncxx::builder::stream::finalize;
+}
+
+// Insert a document into the given collection.
+void insertDocument(mongocxx::collection& collection, const bsoncxx::document::value& document)
+{
+	collection.insert_one(document.view());
+}
+
+// Delete a document from a given collection.
+void deleteDocument(mongocxx::collection& collection, const bsoncxx::document::value& document)
+{
+	collection.delete_one(document.view());
+}
+
+// Update the document with given key-value pair.
+void updateDocument(mongocxx::collection& collection, const string& key, const string& value, const string& newKey, const string& newValue)
+{
+
+	// Create the query filter
+	auto filter = bsoncxx::builder::stream::document{} << key << value << bsoncxx::builder::stream::finalize;
+
+	//Add query filter argument in find
+	auto cursor = collection.find({ filter });
+
+	for (auto&& doc : cursor)
+	{
+		if (doc[key].get_string().value == value)
+		{
+			collection.update_one(doc, bsoncxx::builder::stream::document{} << "$set" << bsoncxx::builder::stream::open_document << newKey << newValue << bsoncxx::builder::stream::close_document << bsoncxx::builder::stream::finalize);
+		}
+	}
+}
+
+// Find the document with given key-value pair.
+void findDocument(mongocxx::collection& collection, const string& key, const string& value)
+{
+	// Create the query filter
+	auto filter = bsoncxx::builder::stream::document{} << key << value << bsoncxx::builder::stream::finalize;
+
+	//Add query filter argument in find
+	auto cursor = collection.find({ filter });
+
+	for (auto&& doc : cursor)
+	{
+		if (doc[key].get_string().value == value)
+		{
+			cout << bsoncxx::to_json(doc) << endl;
+		}
+	}
+}
+
+
+// ********************************************** I/O Methods **********************************************
+
+// Input student record.
+void inputStudentRecord(mongocxx::collection& collection)
+{
+	string name, rollNo, branch, year;
+
+	cout << "Enter name: ";
+	cin >> name;
+
+	cout << "Enter roll number: ";
+	cin >> rollNo;
+
+	cout << "Enter branch: ";
+	cin >> branch;
+
+	cout << "Enter year: ";
+	cin >> year;
+
+	insertDocument(collection, createDocument({ {"name", name}, {"rollNo", rollNo}, {"branch", branch}, {"year", year} }));
+}
+
+// Update student record.
+void updateStudentRecord(mongocxx::collection& collection)
+{
+	string rollNo, newBranch, newYear;
+
+	cout << "Enter roll number: ";
+	cin >> rollNo;
+
+	cout << "Enter new branch: ";
+	cin >> newBranch;
+
+	cout << "Enter new year: ";
+	cin >> newYear;
+
+	updateDocument(collection, "rollNo", rollNo, "branch", newBranch);
+	updateDocument(collection, "rollNo", rollNo, "year", newYear);
+}
+
+// Find student record.
+void findStudentRecord(mongocxx::collection& collection)
+{
+	string rollNo;
+
+	cout << "Enter roll number: ";
+	cin >> rollNo;
+
+	findDocument(collection, "rollNo", rollNo);
+}
+
+// Delete student record.
+void deleteStudentRecord(mongocxx::collection& collection)
+{
+	string rollNo;
+
+	cout << "Enter roll number: ";
+	cin >> rollNo;
+
+	deleteDocument(collection, createDocument({ {"rollNo", rollNo} }));
+}
+
+// Print student records.
+void printStudentRecords(mongocxx::collection& collection)
+{
+	printCollection(collection);
+}
+
+
+// ********************************************** Main **********************************************
+int main()
+{
+    cout << "Hello World!" << endl;
+
+	if (s_Cluster0_uri.to_string().empty())
+	{
+		cout << "URI is empty";
+		return 0;
+	}
+
+	// Create an instance.
+    mongocxx::instance inst{};
+
+    mongocxx::options::client client_options;
+    auto api = mongocxx::options::server_api{ mongocxx::options::server_api::version::k_version_1 };
+    client_options.server_api_opts(api);
+    mongocxx::client conn{ s_Cluster0_uri, client_options};
+
+
+
+	const string dbName = "StudentRecords";
+	const string collName = "StudentCollection";
+
+	auto dbs = getDatabases(conn);
+	// Check if database already exists.
+	if (!(std::find(dbs.begin(), dbs.end(), dbName) != dbs.end()))
+	{
+		// Create a new database & collection for students.
+		conn[dbName];
+	}
+
+	auto studentDB = conn.database(dbName);
+	auto allCollections = studentDB.list_collection_names();
+
+	// Check if collection already exists.
+	if (!(std::find(allCollections.begin(), allCollections.end(), collName) != allCollections.end()))
+	{
+		createCollection(studentDB, collName);
+	}
+
+	auto studentCollection = studentDB.collection(collName);
+
+	// Create a menu to for user interaction
+	 int choice = -1;
+
+	 do while (choice != 0)
+	 {
+		 //system("cls");
+		 cout << endl << "**************************************************************************************************************" << endl;
+
+		 cout << "Enter 1 to input student record" << endl;
+		 cout << "Enter 2 to update student record" << endl;
+		 cout << "Enter 3 to find student record" << endl;
+		 cout << "Enter 4 to delete student record" << endl;
+		 cout << "Enter 5 to print all student records" << endl;
+		 cout << "Enter 0 to exit" << endl;
+		 cout << "Enter Choice : "; 
+		 cin >> choice;
+
+		 cout << endl;
+
+		 switch (choice)
+		 {
+		 case 1:
+			 inputStudentRecord(studentCollection);
+			 break;
+		 case 2:
+			 updateStudentRecord(studentCollection);
+			 break;
+		 case 3:
+			 findStudentRecord(studentCollection);
+			 break;
+		 case 4:
+			 deleteStudentRecord(studentCollection);
+			 break;
+		 case 5:
+			 printStudentRecords(studentCollection);
+			 break;
+		 case 0:
+			 break;
+		 default:
+			 cout << "Invalid choice" << endl;
+			 break;
+		 }
+
+	 } while (choice != 0);
+
+	 return 0;
+}