add all as an event emitter

index.js

@@ -2,6 +2,7 @@
 
 const got = require('got');
 const uniqueRandomArray = require('unique-random-array');
+const EventEmitter = require('eventemitter3');
 
 const randomCache = {};
 
@@ -32,6 +33,23 @@ function randomPuppy(subreddit) {
         .then(getRandomImage => formatResult(getRandomImage));
 }
 
+// silly feature to play with observables
+function all(subreddit) {
+    const eventEmitter = new EventEmitter();
+
+    function emitRandomImage(subreddit) {
+        randomPuppy(subreddit).then(imageUrl => {
+            eventEmitter.emit('data', imageUrl + '#' + subreddit);
+            if (eventEmitter.listeners('data').length) {
+                setTimeout(() => emitRandomImage(subreddit), 200);
+            }
+        });
+    }
+
+    emitRandomImage(subreddit);
+    return eventEmitter;
+}
+
 function callback(subreddit, cb) {
     randomPuppy(subreddit)
         .then(url => cb(null, url))
@@ -49,3 +67,5 @@ module.exports = (subreddit, cb) => {
         return randomPuppy(subreddit);
     }
 };
+
+module.exports.all = all;

package.json

@@ -1,7 +1,7 @@
 {
   "name": "random-puppy",
-  "version": "1.0.1",
-  "description": "Get a random puppy image url.",
+  "version": "1.1.0",
+  "description": "Get a random imgur image url, by default a puppy.",
   "license": "MIT",
   "repository": "dylang/random-puppy",
   "author": {
@@ -13,7 +13,8 @@
     "node": ">=4.0.0"
   },
   "scripts": {
-    "test": "xo && ava"
+    "test": "xo && ava",
+    "watch": "ava --watch"
   },
   "files": [
     "index.js"
@@ -27,11 +28,13 @@
     "placeholder"
   ],
   "dependencies": {
+    "eventemitter3": "^1.2.0",
     "got": "^6.3.0",
     "unique-random-array": "^1.0.0"
   },
   "devDependencies": {
     "ava": "^0.14.0",
+    "rx-lite": "^4.0.8",
     "xo": "^0.14.0"
   },
   "xo": {

readme.md

@@ -27,14 +27,33 @@ randomPuppy()
 
 ## API
 
-### randomPuppy()
+### `randomPuppy()`
 
 Returns a `promise` for a random puppy image url from http://imgur.com/ from https://www.reddit.com/r/puppy
 
-### randomPuppy(subreddit)
+### `randomPuppy(subreddit)`
 
 Returns a `promise` for a random image url from the selected subreddit. *Warning: We cannot promise it will be a image of a puppy!*
 
+### `randomPuppy.all(subreddit)`
+
+Returns an `eventemitter` for getting all random images for a subreddit.
+
+```js
+const event = randomPuppy.all(subreddit);
+event.on('data', url => console.log(url));
+```
+
+Or:
+```js
+const event = randomPuppy.all('puppies');
+
+Observable.fromEvent(event, 'data')
+    .subscribe(data => {
+      console.log(data);
+    });
+```
+
 ## Notes
 
 * Node 4 or newer.

test.js

@@ -1,7 +1,8 @@
 import test from 'ava';
+import {Observable} from 'rx-lite';
 import randomPuppy from './';
 
-const imgurRegEx = /^https?:\/\/(\w+\.)?imgur.com\/[a-zA-Z0-9]+(\.[a-zA-Z]{3})?$/;
+const imgurRegEx = /^https?:\/\/(\w+\.)?imgur.com\/[a-zA-Z0-9]+(\.[a-zA-Z]{3})?(#[a-zA-Z]*)?$/;
 
 test('get random', async t => {
     const result = await randomPuppy();
@@ -58,3 +59,22 @@ test('invalid subreddit', async t => {
     const result4 = await randomPuppy(false);
     t.regex(result4, imgurRegEx);
 });
+
+test('all', t => {
+    t.plan(10);
+    const puppyEmitter = randomPuppy.all('puppies');
+    const robotEmitter = randomPuppy.all('robots');
+
+    const puppySource = Observable.fromEvent(puppyEmitter, 'data');
+    const robotSource = Observable.fromEvent(robotEmitter, 'data');
+
+    const sharedSource = Observable
+        .merge(puppySource, robotSource)
+        .take(10);
+
+    sharedSource.subscribe(data => {
+        t.regex(data, imgurRegEx);
+        // console.log(data);
+    });
+    return sharedSource.toPromise();
+});