Change to having one record file per day and rewrite file access infrastructure to serve this.

I believe this is a useful improvement. The main two advantages are that a) it is very cheap to check whether a record exists for a given day - just check for file presence and b) there is a reasonable limit to the size of these files (never more than a few hundred records per day) which means that they can just be loaded into ram for processing without any complex splitting operations
Currently, the necessary `~/asteroid-healthloggerd/stepCounter` and `...loggerd/heartrateMonitor` directories are not automatically created and the code just vomits errors into log if it can't write to them.

1 files changed, 7 insertions, 2 deletions

diff --git a/logger.h b/logger.h
index 53d797e..e56a51a 100644
--- a/logger.h
+++ b/logger.h
@@ -3,6 +3,7 @@
 
 #include <QObject>
 #include <QDateTime>
+#include <QDate>
 #include <QDBusInterface>
 #include <QTimer>
 #include <QString>
@@ -16,6 +17,7 @@ class Logger : public QObject
 public:
     explicit Logger(QObject *parent = 0);
     virtual ~Logger() {};
+
 private slots:
     void displayOn(QString displayState);
 
@@ -25,8 +27,11 @@ private:
     HeartrateSensorPlugin *m_heartrateSensor;
     bool stepCounterEnabled = true;
     StepCounterPlugin *m_stepCounter;
+
 };
-void writeReadingToFile(QString data, QString filename);
-QString getLineFromFile(int lineNumber, QString filename);
+    void fileAddRecord(QString sensorPrefix, QString logdata, QDateTime recordTime = QDateTime::currentDateTime()); //adds a record to today's log file for the given sensor
+    bool dayFileExists(QString sensorPrefix, QDateTime date = QDateTime::currentDateTime()); //check if today has a log file for the given sensor
+    QStringList fileGetPrevRecord(QString sensorPrefix, QDateTime recordTime = QDateTime::currentDateTime()); //works backwards to find the last record in today's file before the given time - returns nothing if no file is found.
+    QString fileNameForDate(QDate date, QString prefix);
 
 #endif // LOGGER_H