Detect first run and initialize database and config

Relates to #1

shared/common.cpp

@@ -1,7 +1,93 @@
 #include <QProcessEnvironment>
 #include <QSettings>
+#include <QStandardPaths>
+#include <QDir>
+#include <QSqlDatabase>
+#include <QSqlQuery>
+#include <QSqlError>
+#include <QTextStream>
+#include <QDebug>
+#include "qssgeneralexception.h"
 #include "common.h"
 
+#define SETTINGS_KEY_DBPATH "dbpath"
+#define SETTINGS_KEY_FIRSTRUN "firstrun"
+
+inline void initResources()
+{
+	Q_INIT_RESOURCE(create);
+}
+
+bool Common::initSqliteDatabase(QString path)
+{
+	QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE");
+	db.setDatabaseName(path);
+	if(!db.open())
+	{
+		qDebug() << "failed to open database: " << path;
+		return false;
+	}
+	initResources();
+	QFile file(":./create.sql");
+	if(!file.open(QIODevice::ReadOnly))
+	{
+		qDebug() << "Failed to load SQL creation script from embedded resource";
+		return false;
+	}
+	QTextStream stream(&file);
+	db.transaction();
+	while(!stream.atEnd())
+	{
+		QString sql = stream.readLine();
+		qDebug() << sql;
+		QSqlQuery sqlQuery;
+		if(!sqlQuery.exec(sql))
+		{
+			qDebug() << "Failed to execute sql statement while initializing database: " << sqlQuery.lastError();
+			db.rollback();
+			return false;
+		}
+	}
+	db.commit();
+	db.close();
+	file.close();
+	return true;
+}
+
+void Common::ensureConfigured()
+{
+	QSettings settings;
+	QVariant firstRun = settings.value(SETTINGS_KEY_FIRSTRUN);
+	if(!firstRun.isValid())
+	{
+		QString dbpath = QStandardPaths::writableLocation(QStandardPaths::AppLocalDataLocation);
+		QDir dir;
+		if(!dir.exists(dbpath))
+		{
+			if(!dir.mkpath(dbpath))
+			{
+				throw QSSGeneralException("Failed to create dbpath directory");
+			}
+		}
+		dbpath += "/qss.sqlite";
+		if(!initSqliteDatabase(dbpath))
+		{
+			throw QSSGeneralException("Failed to initialize sqlite database");
+		}
+		settings.setValue(SETTINGS_KEY_FIRSTRUN, false);
+		settings.setValue(SETTINGS_KEY_DBPATH, dbpath);
+	}
+	else
+	{
+
+		QString dbpath = databasePath();
+		if(!QFile::exists(dbpath))
+		{
+			throw QSSGeneralException("Database " + dbpath + " was not found");
+		}
+	}
+}
+
 void Common::setupAppInfo()
 {
 	QCoreApplication::setOrganizationName("quitesimple.org");
@@ -15,7 +101,7 @@ QString Common::databasePath()
 	if(env == "")
 	{
 		QSettings settings;
-		return settings.value("dbpath").toString();
+		return settings.value(SETTINGS_KEY_DBPATH).toString();
 	}
 	return env;
 }

shared/common.h

@@ -6,5 +6,7 @@ namespace Common
 {
 void setupAppInfo();
 QString databasePath();
+bool initSqliteDatabase(QString path);
+void ensureConfigured();
 } // namespace Common
 #endif