module ap.activity_stream;

import std.json;

import util;

/++ 
 * Basic ActivityStream Object
 * https://www.w3.org/TR/activitypub/#obj
 +/
class ASObject {
  string context; /// Must be activitystream context
  string id; /// AP requirement for unique identifier
  string type; /// AP requirement for type of object

  JSONValue raw;

  /++ 
   + Constructs the object according to json source
   + Params:
   +   json = the source json
   + Returns: Object
   +/
  this(JSONValue json) {
    with (this) {
      const(JSONValue)* ascontext = "@context" in json;

      if (ascontext == null)
        throw new Exception("No context in ActivityStream Object");

      switch ((*ascontext).type) {
      case JSONType.ARRAY:
        context = (*ascontext)[0].str;
        break;

      case JSONType.STRING:
        context = (*ascontext).str;
        break;

      default:
        throw new Exception("Invalid @context type for ActivityStream Object");
      }

      id = json.requiredKey!"id".str;
      type = json.requiredKey!"type".str;

      raw = json;
    }
  }
}