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/*
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 * Copyright (C) 2014-2017 CZ.NIC
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 *
 * This program 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.
 *
 * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
 *
 * In addition, as a special exception, the copyright holders give
 * permission to link the code of portions of this program with the
 * OpenSSL library under certain conditions as described in each
 * individual source file, and distribute linked combinations including
 * the two.
 */

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import QtQuick 2.7
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import QtQuick.Controls 2.0
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import QtQuick.Window 2.1
import QtQuick.Layouts 1.2
import QtQuick.Dialogs 1.2
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import cz.nic.mobileDatovka 1.0
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ApplicationWindow {

    // Get deafult color theme and palette from system
    SystemPalette { id: datovkaPalette; colorGroup: SystemPalette.Active }
    id: mainWindow
    visible: true
    title: "Datovka"
    width: 800
    height: 600
    color: datovkaPalette.window

    Text {
        id: defaultTextFont
        text: ""
    }

    // define all pages for stackview
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    property Component pageAboutApp: PageAboutApp {}
    property Component pageAccountDetail: PageAccountDetail {}
    property Component pageAccountList: PageAccountList {}
    property Component pageMenuaccount: PageMenuAccount {}
    property Component pageMenuDatovkaSettings: PageMenuDatovkaSettings {}
    property Component pageMenuMessage: PageMenuMessage {}
    property Component pageMenuMessageDetail: PageMenuMessageDetail {}
    property Component pageMenuMessageList: PageMenuMessageList {}
    property Component pageMessageDetail: PageMessageDetail {}
    property Component pageMessageList: PageMessageList {}
    property Component pageSettingsAccount: PageSettingsAccount {}
    property Component pageSettingsGeneral: PageSettingsGeneral {}
    property Component pageSettingsPin: PageSettingsPin {}
    property Component pageSettingsStorage: PageSettingsStorage {}
    property Component pageSettingsSync: PageSettingsSync {}
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    // header background color
    property string mainHeaderBgColor: "#00539b"
    property int statusBarTimer: 5000
    // dimension and style based on font pixel size and screen dpi
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    property int textFontSizeInPixels: defaultTextFont.font.pixelSize
    property int textPointSmall: Math.round(defaultTextFont.font.pointSize * 0.7)
    property int textFontSizeSmall: if (textPointSmall > 0) {textPointSmall} else {8}
    property int headerHeight: textFontSizeInPixels * 3
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    property int imgHeight: headerHeight * 0.8
    property int navImgHeight: headerHeight * 0.3
    property int listItemHeight: headerHeight * 1.5
    property int defaultMargin: Math.round(Screen.pixelDensity)
    property int acntListSpacing: defaultMargin * 2
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    property int formItemVerticalSpacing: defaultMargin * 3
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    property int formButtonHorizontalSpacing: defaultMargin * 5
    // global passing arguments between pages
    property string gUserName
    property string gAcntName
    property int gMsgType
    property string gMsgId
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    property bool gCanDeleteMsg: false
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    /* compare message delivery date with current date-90days */
    property int deleteAfterDays: 90
    function compareMsgDate(msgDeliveryTime) {
        if (msgDeliveryTime == "") {
            // message has virus or delivery time missing
            return true
        } else {
            // convert qml date format to ISO date format
            var inputDateFormat = /(\d{2})\.(\d{2})\.(\d{4})/;
            var msgDate = new Date(msgDeliveryTime.replace(inputDateFormat,'$3-$2-$1'));
            var today = new Date()
            today.setDate(today.getDate()-deleteAfterDays)
            // compare both dates in milliseconds
            return (today.getTime() > msgDate.getTime())
        }
    }

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    // page stack
    Rectangle  {
        id: mainPage
        anchors.fill: parent
        color: "transparent"
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        visible: true
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        StackView {
            id: pageView
            anchors.fill: parent
            visible: true
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            initialItem: pageAccountList
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        }
    }
    Rectangle {
        id: statusBar
        visible: false
        anchors.left: parent.left
        anchors.bottom: parent.bottom
        anchors.right: parent.right
        height: headerHeight * 0.5
        color: datovkaPalette.alternateBase
        BusyIndicator {
           id: busyuIndicator
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           width: parent.height
           height: parent.height
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           anchors.centerIn: parent
           running: false
        }
        Label {
            id: statusBarText
            color: datovkaPalette.text
            anchors.centerIn: parent
            text: mainWindow.width + " x "+ mainWindow.height
            Connections {
                target: isds
                onStatusBarTextChanged: {
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                    statusBar.visible = isVisible
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                    statusBarText.text = txt
                    busyuIndicator.running = busy
                    timerId.running = !busy
                }
            }
            Connections {
                target: files
                onStatusBarTextChanged: {
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                    statusBar.visible = true
                    statusBarText.text = txt
                    busyuIndicator.running = busy
                    timerId.running = !busy
                }
            }
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            Connections {
                target: settings
                onStatusBarTextChanged: {
                    statusBar.visible = true
                    statusBarText.text = txt
                    busyuIndicator.running = busy
                    timerId.running = !busy
                }
            }
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        }
        Timer {
            id: timerId
            interval: statusBarTimer;
            running: false;
            repeat: false
            onTriggered: {
                timerId.running = false
                statusBar.visible = false
                statusBarText.text = ""
            }
        }
    }
    Rectangle  {
        id: pinScreen
        visible: false
        anchors.fill: parent
        color: "transparent"
        Column {
            spacing: formItemVerticalSpacing
            anchors.centerIn: parent
            TextField {
                id: pinCodeInput
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                //focus: true // Forcing focus here causes troubles on mobile devices.
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                echoMode: TextInput.Password
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                passwordMaskDelay: 500 // milliseconds
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                inputMethodHints: Qt.ImhDigitsOnly
                placeholderText: qsTr("Enter PIN code")
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                anchors.horizontalCenter: parent.horizontalCenter
                horizontalAlignment: TextInput.AlignHCenter
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                function verifyPin() {
                    settings.verifyPin(pinCodeInput.text.toString())
                }

                onEditingFinished: {
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                    // This function is called repeatedly when switching
                    // windows. The condition should reduce PIN verification
                    // calls.
                    if (pinCodeInput.text.length > 0) {
                        verifyPin()
                    }
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                }
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            }
            Text {
                id: wrongPin
                font.bold: true
                visible: false
                color: datovkaPalette.text
                anchors.horizontalCenter: parent.horizontalCenter
                text: qsTr("Wrong PIN code!")
            }
            Row {
                spacing: formButtonHorizontalSpacing
                anchors.horizontalCenter: parent.horizontalCenter
                Button {
                    text: qsTr("Enter")
                    onClicked: {
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                        pinCodeInput.verifyPin()
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                    }
                }
            }
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            Rectangle {
                id: blankField
                width: formItemVerticalSpacing
                height: headerHeight
                color: "transparent"
                anchors.horizontalCenter: parent.horizontalCenter
            }
            Image{
                id: datovkaLogo
                anchors.horizontalCenter: parent.horizontalCenter
                width: imgHeight * 1.4
                height: imgHeight * 1.4
                source: "qrc:/datovka.png"
            }
            Text {
                id: versionLabel
                anchors.horizontalCenter: parent.horizontalCenter
                color: datovkaPalette.text
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                text: qsTr("Version") + ": " + settings.appVersion()
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            }
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        }
        Connections {
            target: settings
            onSendPinReply: {
                if (success) {
                    Qt.inputMethod.hide()
                    mainPage.visible = true
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                    pinScreen.visible = false
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                }
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                wrongPin.visible = !success
                pinCodeInput.text = ""
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            }
        }
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        Connections {
            target: locker
            onLockApp: {
                mainPage.visible = false
                pinScreen.visible = true
            }
        }
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    }
    Item {
        id: backButton
        focus: true
        Keys.onReleased: {
            if (event.key === Qt.Key_Back) {
                event.accepted = true
                if (pageView.depth > 1) {
                    event.accepted = true
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                    pageView.pop(StackView.Immediate)
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                } else {
                    event.accepted = false
                    Qt.quit()
                }
            }
        }
    }
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    Text {
        id: dummyText
        text: ""
        visible: false
        wrapMode: Text.NoWrap
        elide: Text.ElideNone
    }
    function computeMenuWidth(menu) {
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        var w = 0.0
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        for (var i = 0; i < menu.contentData.length; i++) {
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            dummyText.text = menu.contentData[i].text + "www"
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            if (w < dummyText.width) {
                w = dummyText.width
            }
        }
        dummyText.text = ""
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        return Math.round(w)
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    }
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}