Add partial support (#16)

Author: zackify

README.md

@@ -10,61 +10,52 @@ Proof of concept at making http requests easier to work with in JS / Node. This
 npm install legible --save
 ```
 
-A request library using template literals. Making requests has never been so straight forward! Make it easy for users to adopt your api, document it using this library, and everyone will understand making requests. 
+A request library using template literals. Making requests has never been so straight forward! Make it easy for users to adopt your api, document it using this library, and everyone will understand making requests.
 
 ###Example
 
 ```js
 import request from 'legible'
 
 async function TestRequest() {
-  let body = { 
-    email: 'test@test.com', 
-    password: 'secret' 
+  let body = {
+    email: 'test@test.com',
+    password: 'secret'
   }
-  
+
   let response = await request`
     url: https://api.myapp.com/register
     method: POST
     body: ${body}
-    headers: ${{ 
-      Authorization: 'Bearer: token' 
+    headers: ${{
+      Authorization: 'Bearer: token'
     }}
   `
 }
 ```
 
 ##Why Legible?
 
-**Coming Soon** The following isn't implemented yet.
+**New in 0.2.0!**
 
 
 Using template strings, we can pull out variables easily and keep requests as `legible` as possible. Imagine splitting out your code like this using api libraries that include requests like so:
 
 ```js
-import { requestable } from 'legible'
-//api library tweets.js
-export { 
-  register: requestable`
-    url: 'https://api.twitter.com/register', 
-    headers: ${{ 
-      method: 'POST' 
-    }} 
-  `,
-  tweets: requestable`
-    url: https://api.twitter.com/register, 
-  `,
- }
-
-//using the library
-
-import request from 'legible'
-import methods from './tweets'
+import { partial } from 'legible'
 
-request.attach('twitter', methods)
+const twitter = {
+  register: partial`
+    url: https://api.twitter.com/register,
+    method: POST
+  `
+}
 
-request.twitter.register`
-  body: ${{ email: 'test@test.com', password: 'Tester' }}
+twitter.register`
+  body: ${{
+    email: 'test@test.com',
+    password: 'Tester'
+  }}
 `
 ```
 
@@ -95,4 +86,4 @@ Thanks goes to these wonderful people ([emoji key](https://github.com/kentcdodds
 | :---: | :---: |
 <!-- ALL-CONTRIBUTORS-LIST:END -->
 
-This project follows the [all-contributors](https://github.com/kentcdodds/all-contributors) specification. Contributions of any kind welcome!
+This project follows the [all-contributors](https://github.com/kentcdodds/all-contributors) specification. Contributions of any kind welcome!

src/index.js

@@ -1,3 +1,5 @@
 import request from './request'
+import partialRequest from './partial'
 
 export default request
+export const partial = partialRequest

src/partial.js

@@ -0,0 +1,23 @@
+import fetch from 'isomorphic-fetch'
+import normalize from './utilities/normalize'
+
+/*
+  defines a partial request,
+  returns a new function that merges any values
+*/
+
+export default (strings, ...vars) => {
+  let { options, url } = normalize(strings, vars)
+
+  return (strings, ...vars) => {
+    let finalData = normalize(strings, vars)
+    let mergedOptions = { ...options, ...finalData.options }
+
+    return new Promise((resolve, reject) => {
+      fetch(finalData.url || url, mergedOptions)
+      .then(response => response.json())
+      .then(json => resolve(json))
+      .catch(error => reject(error))
+    })
+  }
+}

tests/unit/partial.js

@@ -0,0 +1,34 @@
+import { partial } from '../../src'
+
+describe('partial', () => {
+  it('returns value from response', async function () {
+    const requests = {
+      login: partial`
+        url: https://freegeoip.net/json/github.com
+      `
+    }
+
+    let response = await requests.login`
+      method: GET
+    `
+    expect(response.country_code).to.equal('US')
+  })
+
+  it('returns a new function', async function () {
+    expect(typeof partial`url: https://freegeoip.net/json/github.com`).to.equal('function')
+  })
+
+  it('overwrites partial data', async function () {
+    const requests = {
+      login: partial`
+        url: https://freegeoip.net/json/github.com
+        method: POST
+      `
+    }
+
+    let response = await requests.login`
+      method: GET
+    `
+    expect(response.country_code).to.equal('US')
+  })
+})