add: db ! not connect

src/CMakeLists.txt

@@ -13,6 +13,7 @@ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Werror -O2")
 
 find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Widgets Core)
 find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Widgets Core)
+find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Sql)
 
 set(MAIN_SOURCES
         main.cpp
@@ -37,6 +38,9 @@ set(MAIN_SOURCES
         view/ui/printer_settings.ui
         view/ui/updates.ui
         view/ui/add_preset.ui
+
+        logic/printer_db.cpp
+        logic/printer_db.h
 )
 
 if(${QT_VERSION_MAJOR} GREATER_EQUAL 6)
@@ -50,13 +54,20 @@ else()
 )
 endif()
 
-qt_add_resources(Calc3D "app_resources"
-  PREFIX "/"
-  FILES
-    view/resources.qrc
-)
+# qt_add_resources(Calc3D "app_resources"
+#   PREFIX "/"
+#   FILES
+#     view/resources.qrc
+# )
 
-target_link_libraries(Calc3D PRIVATE Qt${QT_VERSION_MAJOR}::Widgets Qt${QT_VERSION_MAJOR}::Core)
+target_link_libraries(Calc3D PRIVATE Qt${QT_VERSION_MAJOR}::Widgets Qt${QT_VERSION_MAJOR}::Core Qt${QT_VERSION_MAJOR}::Sql)
+
+# путь к бд в проекте, опционально
+# configure_file(
+#     ${CMAKE_CURRENT_SOURCE_DIR}/printers.db
+#     ${CMAKE_CURRENT_BINARY_DIR}/printers.db
+#     COPYONLY
+# ) 
 
 set_target_properties(Calc3D PROPERTIES
     MACOSX_BUNDLE_GUI_IDENTIFIER my.example.com

src/controller/controller.h

@@ -1,23 +0,0 @@
-#pragma once
-
-#include <memory>
-
-#include "../model/facade.h"
-
-class Controller {
- public:
-  Controller(const Controller &other) = delete;
-  Controller(Controller &&other) = delete;
-  void operator=(const Controller &other) = delete;
-  ~Controller() = default;
-
-  static std::shared_ptr<Controller> GetInstance() {
-    static auto instance = std::shared_ptr<Controller>(new Controller);
-    return instance;
-  }
-
- private:
-  std::shared_ptr<Facade> facade;
-
-  Controller() { facade_ = s21::Facade::GetInstance(); }
-};

src/logic/facade.h

@@ -0,0 +1,48 @@
+#pragma once
+
+#include <memory>
+
+#include "printer_db.h"
+
+class Facade {
+ public:
+  Facade(const Facade &other) = delete;
+  Facade(Facade &&other) = delete;
+  void operator=(const Facade &other) = delete;
+  ~Facade() = default;
+
+  static std::shared_ptr<Facade> GetInstance() {
+    static auto instance = std::shared_ptr<Facade>(new Facade);
+    return instance;
+  }
+
+  bool addPrinter(const QString &name, double power, int age, double cost) {
+    return db.addPrinter(name, power, age, cost);
+  }
+
+  QList<QString> getPrinterList() { return db.getPrinterList(); }
+
+  bool deletePrinterByName(const QString &name) {
+    return db.deletePrinterByName(name);
+  }
+
+  bool Database::updatePrinter(const QString &name,
+                               const QHash<QString, QVariant> &updates) {
+    return db.updatePrinter(name, updates);
+  }
+
+ private:
+  Database db;
+
+  Facade() {
+    //! TODO create if doesn't exist
+    QString dbPath =
+        QStandardPaths::writableLocation(QStandardPaths::AppDataLocation) +
+        "/printers.db";  //! TODO name!
+    db(dbPath);
+    if (!db.init()) {
+      qFatal("Database initialization failed!");
+      // TODO make exc
+    }
+  }
+};

src/logic/printer_db.cpp

@@ -0,0 +1,83 @@
+#include "printer_db.h"
+
+Database::Database(const QString &path) {
+  db = QSqlDatabase::addDatabase("QSQLITE");
+  db.setDatabaseName(path);
+}
+
+bool Database::init() {
+  if (!db.open()) {
+    qWarning() << "Error opening database:" << db.lastError();
+    // TODO return ERROR
+    return false;
+  }
+
+  QSqlQuery query;
+  return query.exec(
+      "CREATE TABLE IF NOT EXISTS printers ("
+      "id INTEGER PRIMARY KEY AUTOINCREMENT,"
+      "name TEXT NOT NULL UNIQUE,"
+      "power REAL NOT NULL,"  //! int??
+      "age INTEGER NOT NULL,"
+      "cost REAL NOT NULL");
+}
+
+bool Database::addPrinter(const QString &name, double power, int age,
+                          double cost) {
+  QSqlQuery query;
+  query.prepare(
+      "INSERT INTO printers (name, power, age, cost) VALUES (:name, :power, "
+      ":age, :cost)");
+  query.bindValue(":name", name);
+  query.bindValue(":power", power);
+  query.bindValue(":age", age);
+  query.bindValue(":cost", cost);
+  return query.exec();
+}
+
+QList<QString> Database::getPrinterList() {
+  QList<QString> printers;
+  QSqlQuery query("SELECT name FROM printers");
+  while (query.next()) {
+    printers.append({query.value(0).toString()});
+  }
+  return printers;
+}
+bool Database::deletePrinterByName(const QString &name) {
+  QSqlQuery query;
+  query.prepare("DELETE FROM printers WHERE name = :name");
+  query.bindValue(":name", name);
+
+  if (!query.exec()) {
+    // TODO exc
+    qWarning() << "Delete failed:" << query.lastError().text();
+    return false;
+  }
+
+  // была ли удалена хотя бы одна запись?
+  return query.numRowsAffected() > 0;
+}
+
+bool Database::updatePrinter(const QString &name,
+                                    const QHash<QString, QVariant> &updates) {
+  QStringList setClauses;
+  QSqlQuery query;
+
+  for (auto it = updates.begin(); it != updates.end(); ++it) {
+    setClauses << QString("%1 = :%2").arg(it.key(), it.key());
+    query.bindValue(":" + it.key(), it.value());
+  }
+
+  query.prepare("UPDATE printers SET " + setClauses.join(", ") +
+                " WHERE name = :name");
+  query.bindValue(":name", name);
+
+  return query.exec();
+
+  //! Как создать новое из фасада:
+  // !проще забрать сразу все
+  //   QHash<QString, QVariant> updates;
+  // updates["power"] = 350.0;
+  // updates["cost"] = 27000.0;
+  // db->updatePrinterPartial("MyPrinter", updates);
+}

src/logic/printer_db.h

@@ -0,0 +1,18 @@
+#include <QDebug>
+#include <QSqlDatabase>
+#include <QSqlError>
+#include <QSqlQuery>
+
+class Database {
+ public:
+  Database(const QString &path);
+  bool init();
+  bool addPrinter(const QString &name, double power, int age, double cost);
+  bool deletePrinterByName(const QString &name);
+  QList<QString> getPrinterList();
+  bool updatePrinter(const QString &name,
+                               const QHash<QString, QVariant> &updates);
+
+ private:
+  QSqlDatabase db;
+};

src/model/facade.h

@@ -1,19 +0,0 @@
-#pragma once
-
-#include <memory>
-
-class Facade {
- public:
-  Facade(const Facade &other) = delete;
-  Facade(Facade &&other) = delete;
-  void operator=(const Facade &other) = delete;
-  ~Facade() = default;
-
-  static std::shared_ptr<Facade> GetInstance() {
-    static auto instance = std::shared_ptr<Facade>(new Facade);
-    return instance;
-  }
-
- private:
-  Facade() {}
-};