utils.js

#!/usr/bin/gjs

'use strict';

const ExtensionUtils = imports.misc.extensionUtils;

var wallpaperMode = {
    DAY: 1,
    NIGHT: 2
};

function getDesktopBackgroundSettings() {
    return ExtensionUtils.getSettings('org.gnome.desktop.background');
}

function getAvailablePictureOptions() {
    const backgroundSettings = getDesktopBackgroundSettings();
    return backgroundSettings.settings_schema.get_key('picture-options').get_range().get_child_value(1).get_child_value(0).deep_unpack();
}

function isWallpaperOptionSelected(extensionSettings, wallpaperKey) {
    return extensionSettings.get_string(wallpaperKey) != '';
}

function fallbackToSystemWallpaper(extensionSettings, wallpaperKey) {
    const backgroundSettings = getDesktopBackgroundSettings();
    const systemBackgroundUri = backgroundSettings.get_string('picture-uri');
    extensionSettings.set_string(wallpaperKey, systemBackgroundUri);
}

function fallbackToSystemWallpaperAdjustment(extensionSettings, wallpaperAdjustmentKey) {
    const backgroundSettings = getDesktopBackgroundSettings();
    const systemBackgroundAdjustment = backgroundSettings.get_string('picture-options');
    extensionSettings.set_string(wallpaperAdjustmentKey, systemBackgroundAdjustment);
}

function checkExtensionSettings() {
    const extensionSettings = ExtensionUtils.getSettings();

    if (!isWallpaperOptionSelected(extensionSettings, 'day-wallpaper')) {
        fallbackToSystemWallpaper(extensionSettings, 'day-wallpaper');
    }

    if (!isWallpaperOptionSelected(extensionSettings, 'day-wallpaper-adjustment')) {
        fallbackToSystemWallpaperAdjustment(extensionSettings, 'day-wallpaper-adjustment');
    }

    if (!isWallpaperOptionSelected(extensionSettings, 'night-wallpaper')) {
        fallbackToSystemWallpaper(extensionSettings, 'night-wallpaper');
    }

    if (!isWallpaperOptionSelected(extensionSettings, 'night-wallpaper-adjustment')) {
        fallbackToSystemWallpaperAdjustment(extensionSettings, 'night-wallpaper-adjustment');
    }
}

var SwitchTime = class SwitchTime {
    constructor(switchHour, switchMinute) {
        this._switchHour = switchHour;
        this._switchMinute = switchMinute;
    }

    get switchHour() {
        return this._switchHour;
    }

    get switchMinute() {
        return this._switchMinute;
    }

    toSettingsFormat() {
        let decimal = this._switchMinute / 60;
        decimal = parseFloat(decimal.toFixed(2));
        return this._switchHour + decimal;
    }

    static newFromSettings(switchTimeFromSettings) {
        let switchHour = parseInt(switchTimeFromSettings);
        let decimal = switchTimeFromSettings - switchHour;
        decimal = parseFloat(decimal.toFixed(2));
        let switchMinute = Math.round(decimal * 60);
        return new SwitchTime(switchHour, switchMinute);
    }
}

var NextWallpaperSwitch = class NextWallpaperSwitch {
    constructor(mode, secondsLeftForSwitch) {
        this._mode = mode;
        this._secondsLeftForSwitch = secondsLeftForSwitch;
    }

    get mode() {
        return this._mode;
    }

    get secondsLeftForSwitch() {
        return this._secondsLeftForSwitch;
    }
}