salix/services/loopback/common/methods/message/send.js

module.exports = Self => {
    Self.remoteMethod('send', {
        description: 'Send message to user',
        accessType: 'WRITE',
        accepts: [{
            arg: 'recipient',
            type: 'string',
            required: true,
            description: 'The user/alias name',
            http: {source: 'path'}
        }, {
            arg: 'data',
            type: 'object',
            required: true,
            description: 'Message data',
            http: {source: 'body'}
        }, {
            arg: 'context',
            type: 'object',
            http: function(ctx) {
                return ctx;
            }
        }],
        returns: {
            type: 'boolean',
            root: true
        },
        http: {
            path: `/:recipient/send`,
            verb: 'post'
        }
    });

    Self.send = async(recipient, data, ctx) => {
        let query = `SELECT vn.messageSendWithUser(?, ?, ?) AS sent`;
        let [result] = await Self.rawSql(query, [ctx.req.accessToken.userId, recipient, data.message]);

        return result;
    };
};