pragma Singleton

import QtQuick

QtObject {
    id: root

    // Screen name -> in-memory image URL from grabToImage
    property var screenshots: ({})
    property int _pending: 0

    // Keep references to prevent garbage collection of the image data
    property var _results: ({})

    signal captureRequested
    signal captureComplete

    function capture(screenCount) {
        _pending = screenCount;
        if (_pending === 0) {
            captureComplete();
            return;
        }
        captureRequested();
    }

    function store(screenName, result) {
        const s = Object.assign({}, screenshots);
        s[screenName] = result.url;
        screenshots = s;

        const r = Object.assign({}, _results);
        r[screenName] = result;
        _results = r;

        _pending--;
        if (_pending <= 0)
            captureComplete();
    }

    function get(screenName) {
        return screenshots[screenName] || "";
    }
}