Gravatar GIcon in GJS

gravatar-gicon.js

#!/usr/bin/env gjs

// Make sure we get the right Gtk
imports.gi.versions.Gtk = "3.0";
const GObject = imports.gi.GObject;
const Gtk = imports.gi.Gtk;
const Gio = imports.gi.Gio;
const GLib = imports.gi.GLib;


/**
 * A select number of fallback types for Gravatars
 */
const GravatarFallback = {
    // a simple, cartoon-style silhouetted outline of a person
    DEFAULT: 'mp',
    // 8-bit arcade-style pixelated faces
    ARCADE: 'retro',
    // Faces with differing features and backgrounds
    FACE: 'wavatar',
    // A geometric pattern based on an email hash
    GEOMETRIC: 'identicon',
    // A "monster" with different colors, faces, etc
    MONSTER: 'monsterid',
    // Robot with different colors, faces, etc
    ROBOT: 'robohash'
};


/**
 * A GIcon for Gravatars
 * See: https://en.gravatar.com/site/implement/images/
 *
 * @param {string} [email] - An email address
 * @param {number} [size] - Size to request; default is 80px, largest is 2048px
 * @param {GravatarFallback} [fallback] - The fallback type
 */
const GravatarIcon = GObject.registerClass({
    GTypeName: 'GravatarIcon'
}, class GravatarIcon extends Gio.FileIcon {

    _init(params) {
        params = Object.assign({
            email: 'none',
            fallback: GravatarFallback.DEFAULT,
            size: 80
        }, params);

        this._email = params.email;

        // Compile the URI
        let uri = `https://www.gravatar.com/avatar/${this.hash}?s=${params.size}&d=${params.fallback}`;

        // Initialize the Gio.FileIcon
        super._init({
            file: Gio.File.new_for_uri(uri)
        });
    }

    get email() {
        return this._email;
    }

    get hash() {
        return GLib.compute_checksum_for_string(
            GLib.ChecksumType.MD5,
            this.email.toLowerCase(),
            -1
        );
    }

    /**
     * Save the Gravatar to disk
     */
    save(filename) {
        this.file.copy_async(
            Gio.File.new_for_path(filename),
            Gio.FileCopyFlags.OVERWRITE,
            GLib.PRIORITY_DEFAULT,
            null,
            null,
            (file, res) => {
                try {
                    file.copy_finish(res);
                } catch (e) {
                    logError(e);
                }
            }
        );
    }
});


/**
 * Example using GravatarIcon in Gtk. You could also use it in GNOME Shell
 * with St.Icon
 */

// Initialize Gtk before you start calling anything from the import
Gtk.init(null);

let window = new Gtk.Window ({
    type: Gtk.WindowType.TOPLEVEL,
    title: 'Gravatar',
    window_position: Gtk.WindowPosition.CENTER,
    visible: true
});
window.connect('delete-event', () => Gtk.main_quit());


// Window Layout
let box = new Gtk.Box({
    orientation: Gtk.Orientation.VERTICAL,
    margin: 18,
    spacing: 12,
    visible: true
});
window.add(box);

let image = new Gtk.Image({
    gicon: new GravatarIcon({
        email: '[email protected]',
        fallback: GravatarFallback.ARCADE,
        size: 2048
    }),
    pixel_size: 256,
    visible: true
});
box.add(image);

let entry = new Gtk.Entry({
    text: '[email protected]',
    placeholder_text: '[email protected]',
    hexpand: true,
    visible: true
});
box.add(entry);

let button = new Gtk.Button({
    label: 'Save',
    halign: Gtk.Align.CENTER,
    visible: true
});
box.add(button);


// Update the Gravatar
entry.connect('activate', (entry) => {
    image.gicon = new GravatarIcon({
        email: entry.text,
        fallback: GravatarFallback.ARCADE,
        size: 2048
    });
});

// Save the Gravatar
button.connect('clicked', () => {
    let downloads = GLib.get_user_special_dir(GLib.UserDirectory.DIRECTORY_DOWNLOAD);
    image.gicon.save(`${downloads}/${image.gicon.hash}.jpg`);
});

Gtk.main();