add isomorphic cookie reading

index.js

@@ -1,7 +1,23 @@
 var cookie = require('cookie');
+var getter = require('./lib/getter');
 var setter = require('./lib/setter');
 
-module.exports = function setCookie(name, value, options) {
+function getCookie(name, options) {
+  var cookieSource = getter(name, options);
+  var parsedCookieMap;
+
+  if (cookieSource) {
+    parsedCookieMap = cookie.parse(cookieSource);
+    return parsedCookieMap[name];
+  }
+}
+
+function setCookie(name, value, options) {
   var cookieStr = cookie.serialize(name, value, options);
   setter(cookieStr, options);
 };
+
+module.exports = {
+  getCookie: getCookie,
+  setCookie: setCookie
+};

lib/getter/client.js

@@ -0,0 +1,6 @@
+/**
+ * Cookie getter for browser environment.
+ */
+module.exports = function getter(cookieName, _) {
+  return document.cookie;
+};

lib/getter/index.js

@@ -0,0 +1,10 @@
+/**
+ * Cookie getter for Node.js environment.
+ */
+module.exports = function getter(cookieName, options) {
+  var req = options && options.req,
+      parsedCookieHeader;
+  if (!req) throw new Error('Must specify `req` when setting cookie.');
+
+  return req.headers.cookie;
+};

package.json

@@ -1,7 +1,7 @@
 {
   "name": "set-cookie",
-  "version": "0.0.4",
-  "description": "Set a cookie using the same API on both the client and the server.",
+  "version": "0.1.0",
+  "description": "Get and set cookies using the same API on both the client and the server.",
   "main": "index.js",
   "scripts": {
     "test": "mocha",
@@ -24,6 +24,7 @@
     "cookie": "^0.1.2"
   },
   "browser": {
+    "./lib/getter/index.js": "./lib/getter/client.js",
     "./lib/setter/index.js": "./lib/setter/client.js"
   },
   "devDependencies": {

test/browser/index.js

@@ -1,7 +1,12 @@
-var setCookie = require('../../');
+var isoCookie = require('../../');
+var readValue;
 
-setCookie('thisIsA', 'cookie in a browser!', {
+isoCookie.setCookie('thisIsA', 'cookie in a browser!', {
   expires: new Date(2020, 1, 1)
 });
 
 console.log(document.cookie);
+
+readValue = isoCookie.getCookie('thisIsA');
+
+console.log(readValue);

test/index.js

@@ -1,4 +1,5 @@
-var setCookie = require('../');
+var getCookie = require('../').getCookie;
+var setCookie = require('../').setCookie;
 var chai = require('chai');
 var sinon = require('sinon');
 var superagent = require('superagent');
@@ -69,3 +70,45 @@ describe('set-cookie', function() {
     });
   });
 });
+
+describe('get-cookie', function() {
+  describe('Node getter', function() {
+    it('throws when not passed `req`', function() {
+      expect(function() {
+        getCookie('myName', {});
+      }).to.throw(/req/);
+    });
+
+    it('returns undefined when passed `req` without a Cookie header', function() {
+      var req = {
+        headers: {}
+      };
+
+      var cookie = getCookie('myName', {req: req});
+      expect(cookie).to.eql(undefined);
+    });
+
+    describe('when passed a Cookie header', function() {
+      var req = {
+        headers: {
+          cookie: 'foo=bar%20baz; cat=meow; dog=ruff'
+        }
+      };
+
+      it('returns undefined if the key is not present', function() {
+        var cookie = getCookie('myName', {req: req});
+        expect(cookie).to.eql(undefined);
+      });
+
+      it('returns the value if the key is present', function() {
+        var cookie = getCookie('cat', {req: req});
+        expect(cookie).to.eql('meow');
+      });
+
+      it('decodes the parsed value', function() {
+        var cookie = getCookie('foo', {req: req});
+        expect(cookie).to.eql('bar baz');
+      });
+    });
+  });
+});