/*

  Copyright © 2016 Hasan Yavuz Özderya

  This file is part of serialplot.

  serialplot is free software: you can redistribute it and/or modify

  it under the terms of the GNU General Public License as published by

  the Free Software Foundation, either version 3 of the License, or

  (at your option) any later version.

  serialplot is distributed in the hope that it will be useful,

  but WITHOUT ANY WARRANTY; without even the implied warranty of

  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License

  along with serialplot.  If not, see <http://www.gnu.org/licenses/>.

*/

#include <QtDebug>

#include "asciireader.h"

/// If set to this value number of channels is determined from input

#define NUMOFCHANNELS_AUTO   (0)

AsciiReader::AsciiReader(QIODevice* device, ChannelManager* channelMan, QObject *parent) :

    AbstractReader(device, channelMan, parent)

{

    paused = false;

    discardFirstLine = true;

    sampleCount = 0;

    _numOfChannels = _settingsWidget.numOfChannels();

    autoNumOfChannels = (_numOfChannels == NUMOFCHANNELS_AUTO);

    connect(&_settingsWidget, &AsciiReaderSettings::numOfChannelsChanged,

            [this](unsigned value)

            {

                _numOfChannels = value;

                autoNumOfChannels = (_numOfChannels == NUMOFCHANNELS_AUTO);

                if (!autoNumOfChannels)

                {

                    emit numOfChannelsChanged(value);

                }

            });

    connect(device, &QIODevice::aboutToClose, [this](){discardFirstLine=true;});

}

QWidget* AsciiReader::settingsWidget()

{

    return &_settingsWidget;

}

unsigned AsciiReader::numOfChannels()

{

    return _numOfChannels;

}

// TODO: this could be a part of AbstractReader

void AsciiReader::enable(bool enabled)

{

    if (enabled)

    {

        discardFirstLine = true;

        QObject::connect(_device, &QIODevice::readyRead,

                         this, &AsciiReader::onDataReady);

    }

    else

    {

        QObject::disconnect(_device, 0, this, 0);

    }

}

void AsciiReader::pause(bool enabled)

{

    paused = enabled;

}

void AsciiReader::onDataReady()

{

    while(_device->canReadLine())

    {

        QByteArray line = _device->readLine();

        // discard only once when we just started reading

        if (discardFirstLine)

        {

            discardFirstLine = false;

            continue;

        }

        // discard data if paused

        if (paused)

        {

            continue;

        }

        // parse data

        line = line.trimmed();

        // Note: When data coming from pseudo terminal is buffered by

        // system CR is converted to LF for some reason. This causes

        // empty lines in the input when the port is just opened.

        if (line.isEmpty())

        {

            continue;

        }

        auto separatedValues = line.split(',');

        unsigned numReadChannels; // effective number of channels to read

        unsigned numComingChannels = separatedValues.length();

        if (autoNumOfChannels)

        {

            // did number of channels changed?

            if (numComingChannels != _numOfChannels)

            {

                _numOfChannels = numComingChannels;

                emit numOfChannelsChanged(numComingChannels);

            }

            numReadChannels = numComingChannels;

        }

        else if (numComingChannels >= _numOfChannels)

        {

            numReadChannels = _numOfChannels;

        }

        else // there is missing channel data

        {

            numReadChannels = separatedValues.length();

            qWarning() << "Incoming data is missing data for some channels!";

        }

        // parse read line

        for (unsigned ci = 0; ci < numReadChannels; ci++)

        {

            bool ok;

            double channelSample = separatedValues[ci].toDouble(&ok);

            if (ok)

            {

                _channelMan->addChannelData(ci, &channelSample, 1);

                sampleCount++;

            }

            else

            {

                qWarning() << "Data parsing error for channel: " << ci;

            }

        }

        emit dataAdded();

    }

}

<?xml version="1.0" encoding="UTF-8"?>

<ui version="4.0">

 <class>MainWindow</class>

 <widget class="QMainWindow" name="MainWindow">

  <property name="geometry">

   <rect>

    <x>0</x>

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    <width>653</width>

   </rect>

  </property>

  <property name="windowTitle">

   <string>SerialPlot</string>

  </property>

  <widget class="QWidget" name="centralWidget">

   <layout class="QVBoxLayout" name="verticalLayout_2">

    <item>

     <widget class="Plot" name="plot" native="true">

      <property name="sizePolicy">

       <sizepolicy hsizetype="Preferred" vsizetype="Expanding">

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       </sizepolicy>

      </property>

     </widget>

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    <item>

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       <sizepolicy hsizetype="Expanding" vsizetype="Minimum">

        <horstretch>0</horstretch>

        <verstretch>0</verstretch>

       </sizepolicy>

      </property>

      <property name="minimumSize">

       <size>

        <width>0</width>

        <height>0</height>

       </size>

      </property>

      <property name="maximumSize">

       <size>

        <width>16777215</width>

        <height>16777215</height>

       </size>

      </property>

      <property name="currentIndex">

       <number>0</number>

      </property>

      <property name="movable">

       <bool>false</bool>

      </property>

      <widget class="QWidget" name="tabLog">

       <attribute name="title">

        <string>Log</string>

       </attribute>

       <attribute name="toolTip">

        <string>Error and Warning Messages</string>

       </attribute>

       <layout class="QHBoxLayout" name="horizontalLayout">

        <property name="leftMargin">

         <number>4</number>

        </property>

        <property name="topMargin">

         <number>4</number>

        </property>

        <property name="rightMargin">

         <number>4</number>

        </property>

        <property name="bottomMargin">

         <number>4</number>

        </property>

        <item>

         <widget class="QPlainTextEdit" name="ptLog">

          <property name="readOnly">

           <bool>true</bool>

          </property>

         </widget>

        </item>

       </layout>

      </widget>

     </widget>

    </item>

   </layout>

  </widget>

  <widget class="QMenuBar" name="menuBar">

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     <width>653</width>

     <height>27</height>

    </rect>

   </property>

   <widget class="QMenu" name="menuHelp">

    <property name="title">

     <string>Help</string>

    </property>

    <addaction name="actionDemoMode"/>

    <addaction name="actionReportBug"/>

    <addaction name="actionHelpAbout"/>

   </widget>

   <widget class="QMenu" name="menuFile">

    <property name="title">

     <string>File</string>