//
//  Purchases.qml
//  qml/hifi/commerce/purchases
//
//  Purchases
//
//  Created by Zach Fox on 2017-08-25
//  Copyright 2017 High Fidelity, Inc.
//
//  Distributed under the Apache License, Version 2.0.
//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
//

import Hifi 1.0 as Hifi
import QtQuick 2.5
import QtQuick.Controls 1.4
import "../../../styles-uit"
import "../../../controls-uit" as HifiControlsUit
import "../../../controls" as HifiControls
import "../wallet" as HifiWallet
import "../common" as HifiCommerceCommon
import "../inspectionCertificate" as HifiInspectionCertificate

// references XXX from root context

Rectangle {
    HifiConstants { id: hifi; }

    id: root;
    property string activeView: "initialize";
    property string referrerURL: "";
    property bool securityImageResultReceived: false;
    property bool punctuationMode: false;
    property bool canRezCertifiedItems: Entities.canRezCertified() || Entities.canRezTmpCertified();
    property bool isShowingMyItems: false;
    property bool isDebuggingFirstUseTutorial: false;
    property bool initialPurchasesReceived: false;
    property bool pendingPurchasesReply: true;
    property bool noMorePurchasesData: false;
    property var pagesAlreadyAdded: new Array();
    property int currentPurchasesPage: 1;

    // Style
    color: hifi.colors.white;
    Connections {
        target: Commerce;

        onWalletStatusResult: {
            if (walletStatus === 0) {
                if (root.activeView !== "needsLogIn") {
                    root.activeView = "needsLogIn";
                }
            } else if (walletStatus === 1) {
                if (root.activeView !== "notSetUp") {
                    root.activeView = "notSetUp";
                    notSetUpTimer.start();
                }
            } else if (walletStatus === 2) {
                if (root.activeView !== "passphraseModal") {
                    root.activeView = "passphraseModal";
                    UserActivityLogger.commercePassphraseEntry("marketplace purchases");
                }
            } else if (walletStatus === 3) {
                if ((Settings.getValue("isFirstUseOfPurchases", true) || root.isDebuggingFirstUseTutorial) && root.activeView !== "firstUseTutorial") {
                    root.activeView = "firstUseTutorial";
                } else if (!Settings.getValue("isFirstUseOfPurchases", true) && root.activeView === "initialize") {
                    root.activeView = "purchasesMain";
                    root.initialPurchasesReceived = false;
                    root.pendingPurchasesReply = true;
                    Commerce.inventory(1);
                }
            } else {
                console.log("ERROR in Purchases.qml: Unknown wallet status: " + walletStatus);
            }
        }

        onLoginStatusResult: {
            if (!isLoggedIn && root.activeView !== "needsLogIn") {
                root.activeView = "needsLogIn";
            } else {
                Commerce.getWalletStatus();
            }
        }

        onInventoryResult: {
            if (result.status !== 'success') {
                console.log("Failed to get purchases", result.message);
            } else {
                var currentPage = parseInt(result.current_page);

                console.log("ZRF length: " + result.data.assets.length + " page: " + currentPage);
                if (result.data.assets.length === 0) {
                    root.noMorePurchasesData = true;
                } else if (root.currentPurchasesPage === 1) {
                    var purchasesResult = processPurchasesResult(result.data.assets);

                    purchasesModel.clear();
                    purchasesModel.append(purchasesResult);

                    if (previousPurchasesModel.count !== 0) {
                        checkIfAnyItemStatusChanged();
                    } else {
                        // Fill statusChanged default value
                        // Not doing this results in the default being true...
                        for (var i = 0; i < purchasesModel.count; i++) {
                            purchasesModel.setProperty(i, "statusChanged", false);
                        }
                    }
                    previousPurchasesModel.append(purchasesResult);

                    buildFilteredPurchasesModel();
                } else {
                    // First, add the purchases result to a temporary model
                    tempPurchasesModel.clear();
                    tempPurchasesModel.append(processPurchasesResult(result.data.assets));

                    // Make a note that we've already added this page to the model...
                    root.pagesAlreadyAdded.push(currentPage);

                    var insertionIndex = 0;
                    // If there's nothing in the model right now, we don't need to modify insertionIndex.
                    if (purchasesModel.count !== 0) {
                        var currentIteratorPage;
                        // Search through the whole purchasesModel and look for the insertion point.
                        // The insertion point is found when the result page from the server is less than
                        //     the page that the current item came from, OR when we've reached the end of the whole model.
                        for (var i = 0; i < purchasesModel.count; i++) {
                            currentIteratorPage = purchasesModel.get(i).resultIsFromPage;
                        
                            if (currentPage < currentIteratorPage) {
                                insertionIndex = i;
                                break;
                            } else if (i === purchasesModel.count - 1) {
                                insertionIndex = i + 1;
                                break;
                            }
                        }
                    }
                    
                    // Go through the results we just got back from the server, setting the "resultIsFromPage"
                    //     property of those results and adding them to the main model.
                    for (var i = 0; i < tempPurchasesModel.count; i++) {
                        tempPurchasesModel.setProperty(i, "resultIsFromPage", currentPage);
                        purchasesModel.insert(i + insertionIndex, tempPurchasesModel.get(i))
                    }

                    buildFilteredPurchasesModel();
                }
            }
            
            root.pendingPurchasesReply = false;

            if (filteredPurchasesModel.count === 0 && !root.noMorePurchasesData) {
                root.initialPurchasesReceived = false;
                root.pendingPurchasesReply = true;
                Commerce.inventory(++root.currentPurchasesPage);
                console.log("Fetching Page " + root.currentPurchasesPage + " of Purchases...");
            // Only auto-refresh if the user hasn't scrolled
            // and there is more data to grab
            } else {
                root.initialPurchasesReceived = true;
            }
            
            if (purchasesContentsList.atYBeginning && !root.noMorePurchasesData) {
                purchasesTimer.start();
            }
        }
    }

    Timer {
        id: notSetUpTimer;
        interval: 200;
        onTriggered: {
            sendToScript({method: 'purchases_walletNotSetUp'});
        }
    }

    HifiInspectionCertificate.InspectionCertificate {
        id: inspectionCertificate;
        z: 999;
        visible: false;
        anchors.fill: parent;

        Connections {
            onSendToScript: {
                sendToScript(message);
            }
        }
    }

    HifiCommerceCommon.CommerceLightbox {
        id: lightboxPopup;
        visible: false;
        anchors.fill: parent;

        Connections {
            onSendToParent: {
                sendToScript(msg);
            }
        }
    }

    //
    // TITLE BAR START
    //
    HifiCommerceCommon.EmulatedMarketplaceHeader {
        id: titleBarContainer;
        z: 998;
        visible: !needsLogIn.visible;
        // Size
        width: parent.width;
        // Anchors
        anchors.left: parent.left;
        anchors.top: parent.top;

        Connections {
            onSendToParent: {
                if (msg.method === 'needsLogIn' && root.activeView !== "needsLogIn") {
                    root.activeView = "needsLogIn";
                } else if (msg.method === 'showSecurityPicLightbox') {
                    lightboxPopup.titleText = "Your Security Pic";
                    lightboxPopup.bodyImageSource = msg.securityImageSource;
                    lightboxPopup.bodyText = lightboxPopup.securityPicBodyText;
                    lightboxPopup.button1text = "CLOSE";
                    lightboxPopup.button1method = "root.visible = false;"
                    lightboxPopup.button2text = "GO TO WALLET";
                    lightboxPopup.button2method = "sendToParent({method: 'purchases_openWallet'});";
                    lightboxPopup.visible = true;
                } else {
                    sendToScript(msg);
                }
            }
        }
    }
    MouseArea {
        enabled: titleBarContainer.usernameDropdownVisible;
        anchors.fill: parent;
        onClicked: {
            titleBarContainer.usernameDropdownVisible = false;
        }
    }
    //
    // TITLE BAR END
    //

    Rectangle {
        id: initialize;
        visible: root.activeView === "initialize";
        anchors.top: titleBarContainer.bottom;
        anchors.topMargin: -titleBarContainer.additionalDropdownHeight;
        anchors.bottom: parent.bottom;
        anchors.left: parent.left;
        anchors.right: parent.right;
        color: hifi.colors.white;

        Component.onCompleted: {
            securityImageResultReceived = false;
            root.initialPurchasesReceived = false;
            root.pendingPurchasesReply = true;
            Commerce.getWalletStatus();
        }
    }

    HifiWallet.NeedsLogIn {
        id: needsLogIn;
        visible: root.activeView === "needsLogIn";
        anchors.top: parent.top;
        anchors.bottom: parent.bottom;
        anchors.left: parent.left;
        anchors.right: parent.right;

        Connections {
            onSendSignalToWallet: {
                sendToScript(msg);
            }
        }
    }
    Connections {
        target: GlobalServices
        onMyUsernameChanged: {
            Commerce.getLoginStatus();
        }
    }

    HifiWallet.PassphraseModal {
        id: passphraseModal;
        visible: root.activeView === "passphraseModal";
        anchors.fill: parent;
        titleBarText: "Purchases";
        titleBarIcon: hifi.glyphs.wallet;

        Connections {
            onSendSignalToParent: {
                if (msg.method === "authSuccess") {
                    root.activeView = "initialize";
                    Commerce.getWalletStatus();
                } else {
                    sendToScript(msg);
                }
            }
        }
    }

    HifiCommerceCommon.FirstUseTutorial {
        id: firstUseTutorial;
        z: 999;
        visible: root.activeView === "firstUseTutorial";
        anchors.fill: parent;

        Connections {
            onSendSignalToParent: {
                switch (message.method) {
                    case 'tutorial_skipClicked':
                    case 'tutorial_finished':
                        Settings.setValue("isFirstUseOfPurchases", false);
                        root.activeView = "purchasesMain";
                        root.initialPurchasesReceived = false;
                        root.pendingPurchasesReply = true;
                        Commerce.inventory(1);
                    break;
                }
            }
        }
    }

    //
    // PURCHASES CONTENTS START
    //
    Item {
        id: purchasesContentsContainer;
        visible: root.activeView === "purchasesMain";
        // Anchors
        anchors.left: parent.left;
        anchors.right: parent.right;
        anchors.top: titleBarContainer.bottom;
        anchors.topMargin: 8 - titleBarContainer.additionalDropdownHeight;
        anchors.bottom: parent.bottom;

        //
        // FILTER BAR START
        //
        Item {
            id: filterBarContainer;
            // Size
            height: 40;
            // Anchors
            anchors.left: parent.left;
            anchors.leftMargin: 8;
            anchors.right: parent.right;
            anchors.rightMargin: 12;
            anchors.top: parent.top;
            anchors.topMargin: 4;

            RalewayRegular {
                id: myText;
                anchors.top: parent.top;
                anchors.topMargin: 10;
                anchors.bottom: parent.bottom;
                anchors.bottomMargin: 10;
                anchors.left: parent.left;
                anchors.leftMargin: 4;
                width: paintedWidth;
                text: isShowingMyItems ? "My Items" : "My Purchases";
                color: hifi.colors.baseGray;
                size: 28;
            }

            HifiControlsUit.TextField {
                id: filterBar;
                colorScheme: hifi.colorSchemes.faintGray;
                hasClearButton: true;
                hasRoundedBorder: true;
                anchors.left: myText.right;
                anchors.leftMargin: 16;
                anchors.top: parent.top;
                anchors.bottom: parent.bottom;
                anchors.right: parent.right;
                placeholderText: "filter items";

                onTextChanged: {
                    buildFilteredPurchasesModel();
                    if (filteredPurchasesModel.count === 0 && !root.noMorePurchasesData) {
                        root.initialPurchasesReceived = false;
                        root.pendingPurchasesReply = true;
                        Commerce.inventory(++root.currentPurchasesPage);
                        console.log("Fetching Page " + root.currentPurchasesPage + " of Purchases...");
                    }
                }

                onAccepted: {
                    focus = false;
                }
            }
        }
        //
        // FILTER BAR END
        //

        HifiControlsUit.Separator {
            id: separator;
            colorScheme: 1;
            anchors.left: parent.left;
            anchors.right: parent.right;
            anchors.top: filterBarContainer.bottom;
            anchors.topMargin: 16;
        }

        ListModel {
            id: purchasesModel;
        }
        ListModel {
            id: previousPurchasesModel;
        }
        HifiCommerceCommon.SortableListModel {
            id: tempPurchasesModel;
        }
        HifiCommerceCommon.SortableListModel {
            id: filteredPurchasesModel;
        }

        Rectangle {
            id: cantRezCertified;
            visible: !root.canRezCertifiedItems;
            color: "#FFC3CD";
            radius: 4;
            border.color: hifi.colors.redAccent;
            border.width: 1;
            anchors.top: separator.bottom;
            anchors.topMargin: 12;
            anchors.left: parent.left;
            anchors.leftMargin: 16;
            anchors.right: parent.right;
            anchors.rightMargin: 16;
            height: 80;

            HiFiGlyphs {
                id: lightningIcon;
                text: hifi.glyphs.lightning;
                // Size
                size: 36;
                // Anchors
                anchors.top: parent.top;
                anchors.topMargin: 18;
                anchors.left: parent.left;
                anchors.leftMargin: 12;
                horizontalAlignment: Text.AlignHCenter;
                // Style
                color: hifi.colors.lightGray;
            }

            RalewayRegular {
                text: "You don't have permission to rez certified items in this domain. " +
                '<b><font color="' + hifi.colors.blueAccent + '"><a href="#">Learn More</a></font></b>';
                // Text size
                size: 18;
                // Anchors
                anchors.top: parent.top;
                anchors.topMargin: 4;
                anchors.left: lightningIcon.right;
                anchors.leftMargin: 8;
                anchors.right: parent.right;
                anchors.rightMargin: 8;
                anchors.bottom: parent.bottom;
                anchors.bottomMargin: 4;
                // Style
                color: hifi.colors.baseGray;
                wrapMode: Text.WordWrap;
                // Alignment
                verticalAlignment: Text.AlignVCenter;
                
                onLinkActivated: {
                    lightboxPopup.titleText = "Rez Permission Required";
                    lightboxPopup.bodyText = "You don't have permission to rez certified items in this domain.<br><br>" +
                        "Use the <b>GOTO app</b> to visit another domain or <b>go to your own sandbox.</b>";
                    lightboxPopup.button1text = "CLOSE";
                    lightboxPopup.button1method = "root.visible = false;"
                    lightboxPopup.button2text = "OPEN GOTO";
                    lightboxPopup.button2method = "sendToParent({method: 'purchases_openGoTo'});";
                    lightboxPopup.visible = true;
                }
            }
        }

        ListView {
            id: purchasesContentsList;
            visible: (root.isShowingMyItems && filteredPurchasesModel.count !== 0) || (!root.isShowingMyItems && filteredPurchasesModel.count !== 0);
            clip: true;
            model: filteredPurchasesModel;
            // Anchors
            anchors.top: root.canRezCertifiedItems ? separator.bottom : cantRezCertified.bottom;
            anchors.topMargin: 12;
            anchors.left: parent.left;
            anchors.bottom: parent.bottom;
            width: parent.width;
            delegate: PurchasedItem {
                canRezCertifiedItems: root.canRezCertifiedItems;
                itemName: title;
                itemId: id;
                itemPreviewImageUrl: preview;
                itemHref: download_url;
                certificateId: certificate_id;
                purchaseStatus: status;
                purchaseStatusChanged: statusChanged;
                itemEdition: model.edition_number;
                numberSold: model.number_sold;
                limitedRun: model.limited_run;
                displayedItemCount: model.displayedItemCount;
                isWearable: model.categories.indexOf("Wearables") > -1;
                anchors.topMargin: 12;
                anchors.bottomMargin: 12;

                Connections {
                    onSendToPurchases: {
                        if (msg.method === 'purchases_itemInfoClicked') {
                            sendToScript({method: 'purchases_itemInfoClicked', itemId: itemId});
                        } else if (msg.method === "purchases_rezClicked") {
                            sendToScript({method: 'purchases_rezClicked', itemHref: itemHref, isWearable: isWearable});
                        } else if (msg.method === 'purchases_itemCertificateClicked') {
                            inspectionCertificate.visible = true;
                            inspectionCertificate.isLightbox = true;
                            sendToScript(msg);
                        } else if (msg.method === "showInvalidatedLightbox") {
                            lightboxPopup.titleText = "Item Invalidated";
                            lightboxPopup.bodyText = 'Your item is marked "invalidated" because this item has been suspended ' +
                            "from the Marketplace due to a claim against its author.";
                            lightboxPopup.button1text = "CLOSE";
                            lightboxPopup.button1method = "root.visible = false;"
                            lightboxPopup.visible = true;
                        } else if (msg.method === "showPendingLightbox") {
                            lightboxPopup.titleText = "Item Pending";
                            lightboxPopup.bodyText = 'Your item is marked "pending" while your purchase is being confirmed. ' +
                            "Usually, purchases take about 90 seconds to confirm.";
                            lightboxPopup.button1text = "CLOSE";
                            lightboxPopup.button1method = "root.visible = false;"
                            lightboxPopup.visible = true;
                        } else if (msg.method === "setFilterText") {
                            filterBar.text = msg.filterText;
                        }
                    }
                }
            }

            onAtYEndChanged: {
                if (purchasesContentsList.atYEnd) {
                    console.log("User scrolled to the bottom of 'My Purchases'.");
                    if (!root.pendingPurchasesReply && !root.noMorePurchasesData) {
                        // Grab next page of results and append to model
                        root.pendingPurchasesReply = true;
                        Commerce.inventory(++root.currentPurchasesPage);
                        console.log("Fetching Page " + root.currentPurchasesPage + " of Purchases...");
                    }
                }
            }
        }

        Item {
            id: noItemsAlertContainer;
            visible: !purchasesContentsList.visible && root.initialPurchasesReceived && root.isShowingMyItems && filterBar.text === "" && root.noMorePurchasesData;
            anchors.top: filterBarContainer.bottom;
            anchors.topMargin: 12;
            anchors.left: parent.left;
            anchors.bottom: parent.bottom;
            width: parent.width;

            // Explanitory text
            RalewayRegular {
                id: noItemsYet;
                text: "<b>You haven't submitted anything to the Marketplace yet!</b><br><br>Submit an item to the Marketplace to add it to My Items.";
                // Text size
                size: 22;
                // Anchors
                anchors.top: parent.top;
                anchors.topMargin: 150;
                anchors.left: parent.left;
                anchors.leftMargin: 24;
                anchors.right: parent.right;
                anchors.rightMargin: 24;
                height: paintedHeight;
                // Style
                color: hifi.colors.baseGray;
                wrapMode: Text.WordWrap;
                // Alignment
                horizontalAlignment: Text.AlignHCenter;
            }

            // "Go To Marketplace" button
            HifiControlsUit.Button {
                color: hifi.buttons.blue;
                colorScheme: hifi.colorSchemes.dark;
                anchors.top: noItemsYet.bottom;
                anchors.topMargin: 20;
                anchors.horizontalCenter: parent.horizontalCenter;
                width: parent.width * 2 / 3;
                height: 50;
                text: "Visit Marketplace";
                onClicked: {
                    sendToScript({method: 'purchases_goToMarketplaceClicked'});
                }
            }
        }

        Item {
            id: noPurchasesAlertContainer;
            visible: !purchasesContentsList.visible && root.initialPurchasesReceived && !root.isShowingMyItems && filterBar.text === "" && root.noMorePurchasesData;
            anchors.top: filterBarContainer.bottom;
            anchors.topMargin: 12;
            anchors.left: parent.left;
            anchors.bottom: parent.bottom;
            width: parent.width;

            // Explanitory text
            RalewayRegular {
                id: haventPurchasedYet;
                text: "<b>You haven't purchased anything yet!</b><br><br>Get an item from <b>Marketplace</b> to add it to My Purchases.";
                // Text size
                size: 22;
                // Anchors
                anchors.top: parent.top;
                anchors.topMargin: 150;
                anchors.left: parent.left;
                anchors.leftMargin: 24;
                anchors.right: parent.right;
                anchors.rightMargin: 24;
                height: paintedHeight;
                // Style
                color: hifi.colors.baseGray;
                wrapMode: Text.WordWrap;
                // Alignment
                horizontalAlignment: Text.AlignHCenter;
            }

            // "Go To Marketplace" button
            HifiControlsUit.Button {
                color: hifi.buttons.blue;
                colorScheme: hifi.colorSchemes.dark;
                anchors.top: haventPurchasedYet.bottom;
                anchors.topMargin: 20;
                anchors.horizontalCenter: parent.horizontalCenter;
                width: parent.width * 2 / 3;
                height: 50;
                text: "Visit Marketplace";
                onClicked: {
                    sendToScript({method: 'purchases_goToMarketplaceClicked'});
                }
            }
        }
    }
    //
    // PURCHASES CONTENTS END
    //

    HifiControlsUit.Keyboard {
        id: keyboard;
        raised: HMD.mounted && filterBar.focus;
        numeric: parent.punctuationMode;
        anchors {
            bottom: parent.bottom;
            left: parent.left;
            right: parent.right;
        }
    }

    onVisibleChanged: {
        if (!visible) {
            purchasesTimer.stop();
        }
    }

    Timer {
        id: purchasesTimer;
        interval: 4000; // Change this back to 90000 after demo
        //interval: 90000;
        onTriggered: {
            if (root.activeView === "purchasesMain" && purchasesContentsList.atYBeginning && !root.pendingPurchasesReply && !root.noMorePurchasesData) {
                console.log("Refreshing 1st Page of Purchases...");
                root.pendingPurchasesReply = true;
                Commerce.inventory(1);
            }
        }
    }

    //
    // FUNCTION DEFINITIONS START
    //

    function processPurchasesResult(purchases) {
        for (var i = 0; i < purchases.length; i++) {
            if (purchases[i].status.length > 1) {
                console.log("WARNING: Purchases result index " + i + " has a status of length >1!")
            }
            purchases[i].status = purchases[i].status[0];
            purchases[i].categories = purchases[i].categories.join(';');
        }
        return purchases;
    }

    function populateDisplayedItemCounts() {
        var itemCountDictionary = {};
        var currentItemId;
        for (var i = 0; i < filteredPurchasesModel.count; i++) {
            currentItemId = filteredPurchasesModel.get(i).id;
            if (itemCountDictionary[currentItemId] === undefined) {
                itemCountDictionary[currentItemId] = 1;
            } else {
                itemCountDictionary[currentItemId]++;
            }
        }

        for (var i = 0; i < filteredPurchasesModel.count; i++) {
            filteredPurchasesModel.setProperty(i, "displayedItemCount", itemCountDictionary[filteredPurchasesModel.get(i).id]);
        }
    }

    function sortByDate() {
        filteredPurchasesModel.sortColumnName = "purchase_date";
        filteredPurchasesModel.isSortingDescending = false;
        filteredPurchasesModel.quickSort();
    }

    function buildFilteredPurchasesModel() {
        var sameItemCount = 0;
        
        tempPurchasesModel.clear();
        for (var i = 0; i < purchasesModel.count; i++) {
            if (purchasesModel.get(i).title.toLowerCase().indexOf(filterBar.text.toLowerCase()) !== -1) {
                if (purchasesModel.get(i).status !== "confirmed" && !root.isShowingMyItems) {
                    tempPurchasesModel.insert(0, purchasesModel.get(i));
                } else if ((root.isShowingMyItems && purchasesModel.get(i).edition_number === "0") ||
                (!root.isShowingMyItems && purchasesModel.get(i).edition_number !== "0")) {
                    tempPurchasesModel.append(purchasesModel.get(i));
                }
            }
        }
        
        if (tempPurchasesModel.count === 0 || filteredPurchasesModel.count === 0) {
            sameItemCount = -1;
        } else {
            for (var i = 0; i < tempPurchasesModel.count; i++) {
                if (tempPurchasesModel.get(i).itemId === filteredPurchasesModel.get(i).itemId &&
                    tempPurchasesModel.get(i).edition_number === filteredPurchasesModel.get(i).edition_number &&
                    tempPurchasesModel.get(i).status === filteredPurchasesModel.get(i).status) {
                    sameItemCount++;
                }
            }
        }
        
        if (sameItemCount !== tempPurchasesModel.count) {
            filteredPurchasesModel.clear();
            for (var i = 0; i < tempPurchasesModel.count; i++) {
                filteredPurchasesModel.append(tempPurchasesModel.get(i));
            }

            populateDisplayedItemCounts();
            sortByDate();
        }
    }

    function checkIfAnyItemStatusChanged() {
        var currentPurchasesModelId, currentPurchasesModelEdition, currentPurchasesModelStatus;
        var previousPurchasesModelStatus;
        for (var i = 0; i < purchasesModel.count; i++) {
            currentPurchasesModelId = purchasesModel.get(i).id;
            currentPurchasesModelEdition = purchasesModel.get(i).edition_number;
            currentPurchasesModelStatus = purchasesModel.get(i).status;

            for (var j = 0; j < previousPurchasesModel.count; j++) {
                previousPurchasesModelStatus = previousPurchasesModel.get(j).status;
                if (currentPurchasesModelId === previousPurchasesModel.get(j).id &&
                    currentPurchasesModelEdition === previousPurchasesModel.get(j).edition_number &&
                    currentPurchasesModelStatus !== previousPurchasesModelStatus) {
                    
                    purchasesModel.setProperty(i, "statusChanged", true);
                } else {
                    purchasesModel.setProperty(i, "statusChanged", false);
                }
            }
        }
    }

    //
    // Function Name: fromScript()
    //
    // Relevant Variables:
    // None
    //
    // Arguments:
    // message: The message sent from the JavaScript, in this case the Marketplaces JavaScript.
    //     Messages are in format "{method, params}", like json-rpc.
    //
    // Description:
    // Called when a message is received from a script.
    //
    function fromScript(message) {
        switch (message.method) {
            case 'updatePurchases':
                referrerURL = message.referrerURL;
                titleBarContainer.referrerURL = message.referrerURL;
                filterBar.text = message.filterText ? message.filterText : "";
            break;
            case 'inspectionCertificate_setCertificateId':
                inspectionCertificate.fromScript(message);
            break;
            case 'purchases_showMyItems':
                root.isShowingMyItems = true;
            break;
            default:
                console.log('Unrecognized message from marketplaces.js:', JSON.stringify(message));
        }
    }
    signal sendToScript(var message);

    //
    // FUNCTION DEFINITIONS END
    //
}