WebAPI/WebVoicemail/Multi-SIM

Proposal: WebVoicemail API for Multi-SIM

Currently B2G supports a single SIM architecture. This proposal wants to extend MozVoicemail API to support multi-SIMs. The basic concept is the same as Telephony/MobileMessage API. I.e., we have a central object for dispatching events, so that API users could just listen to a single event source for different sim cards/services. User could get the voicemail status or voicemail number of a service by specifying the service Id. If user didn't apply a Id, the platform will just use the default Id.

Web API

interface MozVoicemail : EventTarget
{
  /**
   * The current voicemail status of a specified service, or null when the
   * status is unknown
   */
  [Throws]
  MozVoicemailStatus getStatus(optional unsigned long serviceId);

  /**
   * The voicemail box dialing number of a specified service, or null if one
   * wasn't found
   */
  [Throws]
  DOMString getNumber(optional unsigned long serviceId);

  /**
   * The display name of the voicemail box dialing number, or null if one
   * The display name of the voicemail box dialing number of a specified service,
   * or null if one wasn't found
   */
  [Throws]
  DOMString getDisplayName(optional unsigned long serviceId);

  /**
   * The current voicemail status has changed
   */
  attribute EventHandler onstatuschanged;
};