feat: laravel passport provider (#157)

docs/SUMMARY.md

@@ -14,6 +14,7 @@
     * [Facebook](providers/facebook.md)
     * [Github](providers/github.md)
     * [Google](providers/google.md)
+    * [Laravel Passport](providers/passport.md)
 * API
   * [Auth](api/auth.md)
   * [Storage](api/storage.md)

docs/providers/passport.md

@@ -0,0 +1,32 @@
+# Laravel Passport
+
+[Source Code](https://github.com/nuxt-community/auth-module/blob/dev/lib/providers/passport.js)
+
+## Usage
+
+```js
+auth: {
+  strategies: {
+      'laravel.passport': {
+        url: '...',
+        client_id: '...',
+        client_secret: '...'
+      },
+  }
+}
+```
+
+## Usage
+
+Anywhere in your application logic:
+
+```js
+this.$auth.loginWith('passport')
+```
+
+💁 This provider is based on [oauth2 scheme](../schemes/oauth2.md) and supports all scheme options.
+
+### Obtaining `url`, `client_id` and `client_secret`
+
+These options are **REQUIRED**. The `url` is the location of your Laravel application. To obtain the `client_id` and `client_secret`, create a new client app in  your [Laravel app](https://laravel.com/docs/5.6/passport#managing-clients).
+

lib/providers/laravel.passport.js

@@ -0,0 +1,79 @@
+const axios = require('axios')
+const bodyParser = require('body-parser')
+const { assignDefaults } = require('./_utils')
+
+module.exports = function laravelPassport (strategy) {
+  assignDefaults(strategy, {
+    _scheme: 'oauth2',
+    _name: 'laravel.passport',
+    authorization_endpoint: `${strategy.url}/oauth/authorize`,
+    token_endpoint: `${strategy.url}/oauth/token`,
+    token_key: 'access_token',
+    token_type: 'Bearer',
+    response_type: 'code',
+    grant_type: 'authorization_code',
+    scope: '*'
+  })
+
+  // Get client_secret, client_id and token_endpoint
+  const clientSecret = strategy.client_secret
+  const clientID = strategy.client_id
+  const tokenEndpoint = strategy.token_endpoint
+
+  // IMPORTANT: remove client_secret from generated bundle
+  delete strategy.client_secret
+
+  // Endpoint
+  const endpoint = `/_auth/oauth/${strategy._name}/authorize`
+  strategy.access_token_endpoint = endpoint
+
+  // Set response_type to code
+  strategy.response_type = 'code'
+
+  // Form parser
+  const formMiddleware = bodyParser.urlencoded()
+
+  // Register endpoint
+  this.options.serverMiddleware.unshift({
+    path: endpoint,
+    handler: (req, res, next) => {
+      if (req.method !== 'POST') {
+        return next()
+      }
+
+      formMiddleware(req, res, () => {
+        const {
+          code,
+          redirect_uri: redirectUri = strategy.redirect_uri,
+          response_type: responseType = strategy.response_type,
+          grant_type: grantType = strategy.grant_type
+        } = req.body
+
+        if (!code) {
+          return next()
+        }
+
+        axios
+          .request({
+            method: 'post',
+            url: tokenEndpoint,
+            data: {
+              client_id: clientID,
+              client_secret: clientSecret,
+              grant_type: grantType,
+              response_type: responseType,
+              redirect_uri: redirectUri,
+              code
+            },
+            headers: {
+              Accept: 'application/json'
+            }
+          })
+          .then(response => {
+            res.end(JSON.stringify(response.data))
+          })
+          .catch(error => next(error))
+      })
+    }
+  })
+}

lib/schemes/oauth2.js

@@ -99,6 +99,7 @@ export default class Oauth2Scheme {
       const data = await this.$auth.request({
         method: 'post',
         url: this.options.access_token_endpoint,
+        baseURL: false,
         data: encodeQuery({
           code: parsedQuery.code,
           client_id: this.options.client_id,