nearby-news

Keyword Cloud for your current location. A simple API service telling you what's hot near you.

A prototype system. NCNU BigData lecture project.

Data collecting:

1. Parse article from news site. Extract data.
2. Lookup it's location (x, y)
3. Import to DB (RethinkDB)
4. Build geospatial index (RethinkDB or Redis)

User Stream:

1. Locate user (GPS, map center)
2. Get radius (map size)
3. Send location to server, get unsorted array of Entries { [Keywords], timestamp, source, etc}
4. Build and show Keyword Cloud on map.
5. Repeat.

Keyword Score

• Algorithm: sum(1/timeDiff)
  • timeDiff = epoch(now) - epoch(timestamp)
  • score = 1 / (timeDiff / 86400 / 30)
• Test data：
  • timestamp: random in 2007/1/1..2017/1/1
  • 10000 entries, each contains 20 keywords

Docs:

• Diags https://cacoo.com/diagrams/zFHADLJOpHNowcYL#65F5B
• Wireframe https://invis.io/VT9M4KO7R
• Slide https://docs.google.com/presentation/d/1Il1CRVJDEXHyQfRYY71MkgUOekWvhwQLN_WfsOYOKOk/edit?usp=sharing
• Sample data https://docs.google.com/spreadsheets/d/1xcu-0PaMgywk60JRi_6ES6v6BCxXzDrWxwyNP05OKIw/edit?usp=sharing

Nearby News API Server

Overview

Server template was generated by the swagger-codegen project. By using the OpenAPI-Spec from a remote server.

This server uses the Connect middleware layer for Node.js. This service uses RethinkDB Database.

Running the server

To run the server, run:

npm start

To view the Swagger UI interface:

open http://localhost:8080/docs

This project leverages the mega-awesome swagger-tools middleware which does most all the work.