add ability to unlink social accounts (twitter, linkedin)

common/app/routes/settings/components/Social-Settings.jsx

@@ -1,6 +1,7 @@
 import React, { PropTypes } from 'react';
 import { Button } from 'react-bootstrap';
 import FA from 'react-fontawesome';
+import classnames from 'classnames';
 
 export default function SocialSettings({
   isGithubCool,
@@ -22,33 +23,44 @@ export default function SocialSettings({
       { githubCopy }
     </Button>
   ];
-  if (isGithubCool && !isTwitter) {
-    buttons.push((
-      <Button
-        block={ true }
-        bsSize='lg'
-        className='btn-link-social btn-twitter'
-        href='/link/twitter'
-        key='twitter'
-        >
-        <FA name='twitter' />
-        Add my Twitter to my portfolio
-      </Button>
-    ));
-  }
-  if (isGithubCool && !isLinkedIn) {
-    buttons.push((
-      <Button
-        block={ true }
-        bsSize='lg'
-        className='btn-link-social btn-linkedin'
-        href='/link/linkedin'
-        key='linkedin'
-        >
-        <FA name='linkedin' />
-        Add my LinkedIn to my portfolio
-      </Button>
-    ));
+  const socials = [
+    {
+      isActive: isTwitter,
+      identifier: 'twitter',
+      text: 'Twitter'
+    },
+    {
+      isActive: isLinkedIn,
+      identifier: 'linkedin',
+      text: 'LinkedIn'
+    }
+  ];
+  if (isGithubCool) {
+    socials.forEach(({ isActive, identifier, text }) => {
+      const socialClass = classnames(
+        'btn-link-social',
+        `btn-${identifier}`,
+        { active: isActive }
+      );
+      const socialLink = isActive ?
+        `/account/unlink/${identifier}` :
+        `/link/${identifier}`;
+      const socialText = isTwitter ?
+        `Remove my ${text} from my portfolio` :
+        `Add my ${text} to my portfolio`;
+      buttons.push((
+        <Button
+          block={ true }
+          bsSize='lg'
+          className={ socialClass }
+          href={ socialLink }
+          key={ identifier }
+          >
+          <FA name={ identifier } />
+          { socialText }
+        </Button>
+      ));
+    });
   }
   return (<div>{ buttons }</div>);
 }

server/boot/user.js

@@ -184,6 +184,12 @@ module.exports = function(app) {
     getAccount
   );
 
+  api.get(
+    '/account/unlink/:social',
+    sendNonUserToMap,
+    getUnlinkSocial
+  );
+
   // Ensure these are the last routes!
   api.get(
     '/:username/front-end-certification',
@@ -266,6 +272,70 @@ module.exports = function(app) {
     return res.redirect('/' + username);
   }
 
+  function getUnlinkSocial(req, res, next) {
+    const { user } = req;
+    const { username } = user;
+
+    let social = req.params.social;
+    if (!social) {
+      req.flash('errors', {
+        msg: 'No social account found'
+      });
+      return res.redirect('/' + username);
+    }
+
+    social = social.toLowerCase();
+    const validSocialAccounts = ['twitter', 'linkedin'];
+    if (validSocialAccounts.indexOf(social) === -1) {
+      req.flash('errors', {
+        msg: 'Invalid social account'
+      });
+      return res.redirect('/' + username);
+    }
+
+    if (!user[social]) {
+      req.flash('errors', {
+        msg: `No ${social} account associated`
+      });
+      return res.redirect('/' + username);
+    }
+
+    const query = {
+      where: {
+        provider: social
+      }
+    };
+
+    return user.identities(query, function(err, identities) {
+      if (err) { return next(err); }
+
+      // assumed user identity is unique by provider
+      let identity = identities.shift();
+      if (!identity) {
+        req.flash('errors', {
+          msg: 'No social account found'
+        });
+        return res.redirect('/' + username);
+      }
+
+      return identity.destroy(function(err) {
+        if (err) { return next(err); }
+
+        const updateData = { [social]: null };
+
+        return user.update$(updateData)
+          .subscribe(() => {
+            debug(`${social} has been unlinked successfully`);
+
+            req.flash('info', {
+              msg: `You\'ve successfully unlinked your ${social}.`
+            });
+            return res.redirect('/' + username);
+          }, next);
+      });
+    });
+  }
+
   function showUserProfile(req, res, next) {
     const username = req.params.username.toLowerCase();
     const { user } = req;