Data Service: EventService

A data service is requires to encapsulate all API interactions for earthquake events. This service will be responsible for requesting the proper geo-json data from the events feed. This service will make HTTP requests to the event feed url specified below, and will return an observable of the appropriate geo-json entity model.

Specifications:

• Feed URL: https://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/.geojson
• Feed Docs: https://earthquake.usgs.gov/earthquakes/feed/v1.0/geojson.php

Acceptance Criteria:

• Should provide a 'loadAll' method:
• Should accept criteria of type EventFilter as optional parameter
• Should return Observable of EventGeo
• Should throwError of EventGeoError