Simple implementation of CSV file import. Successfully imported items are appended to the model.

data/filehandler.cpp

@@ -5,6 +5,8 @@
 #include <QJsonDocument>
 #include <QStandardPaths>
 
+#include "../formats/csvparser.h"
+
 bool FileHandler::saveToFile(const QJsonDocument& doc, const QString& fileName) {
   qDebug() << "saving file...";
   QString path = QStandardPaths::standardLocations(QStandardPaths::AppDataLocation).at(0);
@@ -29,25 +31,55 @@ bool FileHandler::saveToFile(const QJsonDocument& doc, const QString& fileName)
 }
 
 QByteArray FileHandler::loadJSONDataFromFile(const QString fileName) {
-  QByteArray jsonData;
   QFile file;
   QString path = QStandardPaths::standardLocations(QStandardPaths::AppDataLocation).at(0);
   file.setFileName(path + "/" + fileName);
+
+  QPair<QString, QByteArray> fileContent = getFileContent(path + "/" + fileName);
+
+  return fileContent.second;
+}
+
+QList<QHash<int, QVariant>> FileHandler::getItemValuesFromCSVFile(const QString& filePath) {
+  QList<QHash<int, QVariant>> result;
+  QFile file;
+  file.setFileName(filePath);
+  if (file.exists()) {
+    result = CsvParser::getItemsFromCSVFile(filePath);
+  }
+  return result;
+}
+
+FileHandler::FileHandler() {}
+
+/** Tries to open the file specified by the file path & returns the content
+ * @brief FileHandler::getFileContent
+ * @param filePath
+ * @return Returns an error string (empty if successful) and the file content
+ */
+QPair<QString, QByteArray> FileHandler::getFileContent(const QString& filePath) {
+  QString errorString = "";
+
+  QByteArray fileContent;
+  QFile file;
+  file.setFileName(filePath);
   if (file.exists()) {
     qDebug() << "File found, reading content...";
     const bool successfulOpened = file.open(QIODevice::ReadOnly | QIODevice::Text);
     if (successfulOpened) {
       // TODO learn and decide on the differences between "readAll" and using
       // streams
-      jsonData = file.readAll();
+      fileContent = file.readAll();
       file.close();
     } else {
-      qWarning() << "File could not be opened!";
+      errorString = "File could not be opened!";
+      qWarning() << errorString;
     }
   } else {
-    qInfo() << "File not found. Returning empty result...";
+    errorString = "File not found. Returning empty result...";
+    qInfo() << errorString;
   }
-  return jsonData;
-}
 
-FileHandler::FileHandler() {}
+  const QPair<QString, QByteArray> result(errorString, fileContent);
+  return result;
+}

data/filehandler.h

@@ -1,17 +1,25 @@
 #ifndef FILEHANDLER_H
 #define FILEHANDLER_H
 
+#include <QVariant>
+
 class QJsonDocument;
 class QString;
 class QByteArray;
 
 class FileHandler {
  public:
+  /// JSON
   static bool saveToFile(const QJsonDocument& doc, const QString& fileName);
   static QByteArray loadJSONDataFromFile(const QString fileName);
 
+  /// CSV
+  static QList<QHash<int, QVariant>> getItemValuesFromCSVFile(const QString& filePath);
+
  private:
   explicit FileHandler();
+
+  static QPair<QString, QByteArray> getFileContent(const QString& filePath);
 };
 
 #endif  // FILEHANDLER_H