exam_timer_teacher/examtestpage.cpp

#include "examtestpage.h"

#include "qdatetime.h"
#include "qlineedit.h"
#include "websocketserver.h"

#include "appevent.h"

#include "tmodel.h"
#include "widgets/examsmodel.h"
#include "widgets/pagination.h"

#include <QCheckBox>
#include <QComboBox>
#include <QDialog>
#include <QHeaderView>
#include <QLabel>
#include <QLineEdit>
#include <QMessageBox>
#include <QStatusBar>
#include <QTableView>

#include <QJsonArray>

#include <layoutbuilder.h>

#include "cwf/sqlquery.h"
#include <cwf/constants.h>
#include <cwf/cppwebapplication.h>
#include <cwf/filter.h>
#include <cwf/sqldatabasestorage.h>

static CWF::SqlDatabaseStorage storage("QSQLITE", "localhost", "data.db", "", "");

ExamTestPage::ExamTestPage(QWidget *parent)
    : QWidget{parent}
{
    using namespace Layouting;

    examRoomLineEdit = new QLineEdit;
    examNumberLineEdit = new QLineEdit;

    Column{Form{
               tr("exam room"),
               examRoomLineEdit,
               tr("exam number"),
               examNumberLineEdit,
           },
           br,
           Grid{
               PushButton{text(tr("send exam text")), onClicked([this]() { sendExamText(); })},
               PushButton{text(tr("Begin the exam")), onClicked([this]() { beginExam(); })},
               PushButton{text(tr("un Lock Screen")), onClicked([this]() { unLockScreen(); })},
           }}
        .attachTo(this);

    connect(examRoomLineEdit, &QLineEdit::textChanged, [this](const QString &) {
        const QString &test = examRoomLineEdit->text();
        AppEvent::instance()->setConfigValue("examRoom", test);
    });
    connect(examNumberLineEdit, &QLineEdit::textChanged, [this](const QString &) {
        const QString &test = examNumberLineEdit->text();
        AppEvent::instance()->setConfigValue("examNumber", test);
    });

    const QVariant examRoomValue = AppEvent::instance()->configValue("examRoom");
    const QVariant examNumberValue = AppEvent::instance()->configValue("examNumber");
    examRoomLineEdit->setText(examRoomValue.toString());
    examNumberLineEdit->setText(examNumberValue.toString());
    AppEvent::instance()->setExam(examRoomValue.toString(), examNumberValue.toString());
}

void ExamTestPage::updateExamView()
{
  
}

void ExamTestPage::sendExamText()
{
    QList<QWebSocket *> clients = WebSocketServer::getInstance()->clients();
    for (auto client : clients) {
        QJsonObject param;
        param.insert("method", "request");      // 获取方式
        param.insert("request", "examContent"); // 请求数据

        QJsonObject object;
        object.insert("status", true);
        object.insert("message", true);
        object.insert("code", 200);
        object.insert("data", param);
        QJsonDocument jsonDoc(object);
        QString jsonString = jsonDoc.toJson(QJsonDocument::Compact);
        client->sendTextMessage(jsonString);
    }

    QMessageBox msgBox;
    msgBox.setText(tr("info"));
    msgBox.setInformativeText("考试信息已推送到学生端");
    msgBox.setStandardButtons(QMessageBox::Ok | QMessageBox::Cancel);
    msgBox.setDefaultButton(QMessageBox::Ok);
    msgBox.setButtonText(QMessageBox::Ok, tr("OK"));
    msgBox.setButtonText(QMessageBox::Cancel, tr("Cancel"));
    msgBox.exec();
    return;
}

void ExamTestPage::beginExam()
{
    // 题目获取]
    QString examsQuestion;
    {
        ExamsQuestionModel exams(storage);
        CWF::SqlQueryManager queryManager(storage);
        queryManager.select("*", exams.getTableName()).where("isSelect = ?");
        queryManager.prepare();
        queryManager.addBindValue(1);
        queryManager.exec();
        QJsonArray jsonArray = queryManager.toJson();
        if (!jsonArray.isEmpty()) {
            QString dir;
            QString name;
            for (const QJsonValue &json : jsonArray) {
                if (json.isObject()) {
                    QJsonObject obj = json.toObject();
                    dir = obj["fileDir"].toString();
                    name = obj["name"].toString();
                    examsQuestion = QString("%1(%2)").arg(name).arg(dir);
                    break;
                }
            }
        }
    }
    if (examsQuestion.isEmpty()) {
        QMessageBox msgBox;
        msgBox.setText(tr("info"));
        msgBox.setInformativeText(tr("Please set exam questions first"));
        msgBox.setStandardButtons(QMessageBox::Ok | QMessageBox::Cancel);
        msgBox.setDefaultButton(QMessageBox::Ok);
        msgBox.setButtonText(QMessageBox::Ok, tr("OK"));
        msgBox.setButtonText(QMessageBox::Cancel, tr("Cancel"));
        msgBox.exec();
        return;
    }

    QMessageBox msgBox;
    msgBox.setInformativeText(QString(tr("The current exam question is:%1")).arg(examsQuestion));
    msgBox.setStandardButtons(QMessageBox::Ok | QMessageBox::Cancel);
    msgBox.setDefaultButton(QMessageBox::Ok);
    msgBox.setButtonText(QMessageBox::Ok, tr("OK"));
    msgBox.setButtonText(QMessageBox::Cancel, tr("Cancel"));
    int ret = msgBox.exec();
    if (ret == QMessageBox::Ok) {
        const QString &examRoom = examRoomLineEdit->text();
        const QString &examNumber = examNumberLineEdit->text();
        AppEvent::instance()->setExam(examRoom, examNumber);
        qint64 time = QDateTime::currentSecsSinceEpoch();
        QList<QWebSocket *> clients = WebSocketServer::getInstance()->clients();
        for (auto client : clients) {
            QJsonObject param;
            param.insert("method", "notice");    // 获取方式
            param.insert("notice", "startExam"); //
            param.insert("time", time);          //
            QJsonObject object;
            object.insert("status", true);
            object.insert("message", true);
            object.insert("code", 200);
            object.insert("data", param);
            QJsonDocument jsonDoc(object);
            QString jsonString = jsonDoc.toJson(QJsonDocument::Compact);
            client->sendTextMessage(jsonString);
        }
    }
    emit AppEvent::instance()->beginExam();
}

void ExamTestPage::unLockScreen()
{
    QList<QWebSocket *> clients = WebSocketServer::getInstance()->clients();
    for (auto client : clients) {
        QJsonObject param;
        param.insert("method", "notice");       // 获取方式
        param.insert("notice", "unLockScreen"); //
        QJsonObject object;
        object.insert("status", true);
        object.insert("message", true);
        object.insert("code", 200);
        object.insert("data", param);
        QJsonDocument jsonDoc(object);
        QString jsonString = jsonDoc.toJson(QJsonDocument::Compact);
        client->sendTextMessage(jsonString);
    }
}