xmpp.chapril.org-conversejs/src/converse-caps.js

// Converse.js
// http://conversejs.org
//
// Copyright (c) 2013-2018, the Converse.js developers
// Licensed under the Mozilla Public License (MPLv2)

(function (root, factory) {
    define(["@converse/headless/converse-core"], factory);
}(this, function (converse) {

    const { Strophe, $build, _, b64_sha1 } = converse.env;

    Strophe.addNamespace('CAPS', "http://jabber.org/protocol/caps");

    function propertySort (array, property) {
        return array.sort((a, b) => { return a[property] > b[property] ? -1 : 1 });
    }

    function generateVerificationString (_converse) {
        const identities = _converse.api.disco.own.identities.get(),
              features = _converse.api.disco.own.features.get();

        if (identities.length > 1) {
            propertySort(identities, "category");
            propertySort(identities, "type");
            propertySort(identities, "lang");
        }

        let S = _.reduce(
            identities,
            (result, id) => `${result}${id.category}/${id.type}/${_.get(id, 'lang', '')}/${id.name}<`,
            "");

        features.sort();
        S = _.reduce(features, (result, feature) => `${result}${feature}<`, S);
        return b64_sha1(S);
    }

    function createCapsNode (_converse) {
        return $build("c", {
            'xmlns': Strophe.NS.CAPS,
            'hash': "sha-1",
            'node': "https://conversejs.org",
            'ver': generateVerificationString(_converse)
        }).nodeTree;
    }

    converse.plugins.add('converse-caps', {

        overrides: {
            // Overrides mentioned here will be picked up by converse.js's
            // plugin architecture they will replace existing methods on the
            // relevant objects or classes.
            XMPPStatus: {
                constructPresence () {
                    const presence = this.__super__.constructPresence.apply(this, arguments);
                    presence.root().cnode(createCapsNode(this.__super__._converse));
                    return presence;
                }
            }
        }
    });
}));