Exclude all non-ownCloud chat users from being listed in the app.

[j-ed]

Expected behavior

When the chat app is opened only ownCloud chat users or users of connected chat systems should be listed as available chat contacts. This could e.g. be done by adding the ownCloud domain to a contact record, like 'tom@myowncloud.domain.com', and filter all records based on that criteria.

Actual behavior

When the chat app is opened all kind of chat users are listed as available chat contacts as long as an Instant Messaging field exists in a contact record, including chat addresses from system which cannot be contacted via the ownCloud chat app.

Steps to reproduce

1.) Open the Contacts app and add an Instant messaging field to the record and enter a non-ownCloud address, like 'tom.johnes@somewhere.com'.
2.) Navigate to the Chat app and check which contacts are shown. Usually all kind of instant messaging contacts are shown which contain the mentioned field in their contact record.

Environment

Server Configuration

OS: Linux 3.2.67
Web server: Apache2 2.4.12
Database: MySQL 5.1.73
PHP version: 5.4.39
ownCloud version: 8.0.3
Chat app: 0.4.0

Client Configuration

Browser: Firefox 37.0.2
Operating system: Windows 7