vexdb

VexDB

vexdb is a wrapper for VexDB.

Features

• Promise Based
• Isomorphic: Works both in the browser and in Node.js
• Simple, but powerful filtering
• Smart cache
• Live API
• Complete TypeScript Definitions (it's written in TypeScript)

Installation

Install this package with yarn:

yarn add vexdb

or, if you want to use npm:

npm i vexdb

API Primer

GET

Retrieves data from an endpoint with the specified parameters. These parameters can include any that can be specified to VexDB, as well as final values in the response object.

Normally, vexdb limits responses to 5000 items per request. vexdb will make enough requests to ensure that all applicable matches are returned

// Get all events in StarStruck
var vexdb = require("vexdb");
vexdb.get("events", { season: "StarStruck" }).then(console.log);
 
// Get all teams from California
vexdb
  .get("teams", {
    region: "California",
  })
  .then(console.log);

Size

This works basically identically to .get(), but returns the number of items that fit this result.

// Get the number of all teams in California
vexdb.size("teams", { region: "California" }).then(console.log);
 
// All examples from .get() above would work here...

Depending on the parameters specified, size() may or may not send nodata requests. In order to minimize bandwidth, you'll want to only include parameters that can be passed directly to VexDB

Defaults

In many cases, you'll want to share headers and parameters across requests. This can be done using vexdb.constants.header and vexdb.constants.param, respectively:

vexdb.constants.param({
  region: "California",
});
 
vexdb.constants.header({
  "User-Agent": "<custom user agent string>",
});

Warning: Because of the Cross Origin Policy, setting headers using vexdb.constants.header may cause the browser to automatically block requests to https://api.vexdb.io. It is not reccomended to use headers in the browser.

Caching

Since VexDB only updates every 4 minutes, this module will prevent repeat requests by resolving them with the previous value immediately. You can control this behavior with vexdb.cache

Note: vexdb uses my own keya module to handle cache. In Node, caching will take place using sqlite, while in the browser, caches will be stored first in IndexedDB

Update the Time To Live for new caches

vexdb.cache.setTTL(60 * 1000);

See if a cache is present

vexdb.cache
  .has("teams", {
    region: "South Carolina",
  })
  .then(console.log); // Boolean

Directly resolve a cached value

vexdb.cache.resolve("skills", { region: "Utah" }).then(console.log); // The resolved value, or undefined if the cache isn't present

Clear the cache

vexdb.cache.clear().then(() => console.log("Cache has been cleared"));

Live

This module also supports basic live features. Specify an endpoint and parameters (passed through to get()) and recieve updates on new items that fit that criteria

vexdb
  .live("matches", {
    scored: 1,
    sku: "RE-VRC-17-3805",
  })
  .on("item", console.log);

Note that the item event will trigger for every result on the inital poll. This means that every item that fits the parameters will be passed to item. If you do not want this to be the case, specify prefetch: true in your listed parameters

// Only new matches will trigger item
vexdb
  .live("matches", {
    scored: 1,
    sku: "RE-VRC-17-3805",
    prefetch: true,
  })
  .on("item", console.log);

Events

fetch

• newItems Object[]

Emitted on a successful fetch

prefetch

• results Object[]

Emitted when a prefetch has been completed

item

• item Object

Emitted for each new item

close

Emitted for each new item

---

API

close(): undefined Stop new polls

params(newParams: Object): Object Override request parameters for future requests. Note: this does not change the current index of results

current(): Object[] Returns the current cache of results