zulip/static/js/realm_icon.js

exports.build_realm_icon_widget = function (upload_function) {
    const get_file_input = function () {
        return $('#realm-icon-upload-widget .image_file_input').expectOne();
    };

    if (!page_params.is_admin) {
        return;
    }
    if (page_params.realm_icon_source === 'G') {
        $("#realm-icon-upload-widget .settings-page-delete-button").hide();
    } else {
        $("#realm-icon-upload-widget .settings-page-delete-button").show();
    }
    $("#realm-icon-upload-widget .settings-page-delete-button").on('click', function (e) {
        e.preventDefault();
        e.stopPropagation();
        channel.del({
            url: '/json/realm/icon',
        });
    });

    return upload_widget.build_direct_upload_widget(
        get_file_input,
        $("#realm-icon-upload-widget .image_file_input_error").expectOne(),
        $("#realm-icon-upload-widget .image_upload_button").expectOne(),
        upload_function,
        page_params.max_icon_file_size
    );
};

exports.rerender = function () {
    $("#realm-icon-upload-widget .image-block").attr("src", page_params.realm_icon_url);
    if (page_params.realm_icon_source === 'U') {
        $("#realm-icon-upload-widget .settings-page-delete-button").show();
    } else {
        $("#realm-icon-upload-widget .settings-page-delete-button").hide();
        // Need to clear input because of a small edge case
        // where you try to upload the same image you just deleted.
        const file_input = $("#realm-icon-upload-widget .image_file_input");
        file_input.val('');
    }
};

window.realm_icon = exports;