node-red-contrib-matrix-chat/src/matrix-invite-room.js

module.exports = function(RED) {
    function MatrixInviteRoom(n) {
        RED.nodes.createNode(this, n);

        let node = this;

        this.name = n.name;
        this.server = RED.nodes.getNode(n.server);
        this.roomId = n.roomId;

        if(!this.server) {
            node.error('Server must be configured on the node.', {});
            return;
        }
        node.server.register(node);

        this.encodeUri = function(pathTemplate, variables) {
            for (const key in variables) {
                if (!variables.hasOwnProperty(key)) {
                    continue;
                }
                pathTemplate = pathTemplate.replace(
                    key, encodeURIComponent(variables[key]),
                );
            }
            return pathTemplate;
        };

        node.status({ fill: "red", shape: "ring", text: "disconnected" });

        node.server.on("disconnected", function(){
            node.status({ fill: "red", shape: "ring", text: "disconnected" });
        });

        node.server.on("connected", function() {
            node.status({ fill: "green", shape: "ring", text: "connected" });
        });

        node.on("input", function (msg) {
            if (! node.server || ! node.server.matrixClient) {
                node.error("No matrix server selected", msg);
                return;
            }

            if(!node.server.isConnected()) {
                node.error("Matrix server connection is currently closed", msg);
                node.send([null, msg]);
                return;
            }

            msg.topic = node.roomId || msg.topic;
            if(!msg.topic) {
                node.error("room must be defined in either msg.topic or in node config", msg);
                return;
            }

            // we need the status code, so set onlydata to false for this request
            node.server.matrixClient
                .invite(msg.topic, msg.userId, undefined, msg.reason || undefined)
                .then(function(e){
                    msg.payload = e;
                    node.send([msg, null]);
                }).catch(function(e){
                    node.warn("Error inviting to room " + e);
                    msg.error = e;
                    node.send([null, msg]);
                });
        });

        node.on("close", function() {
            node.server.deregister(node);
        });
    }
    RED.nodes.registerType("matrix-invite-room", MatrixInviteRoom);
}