automatic token refresh, initial stage

backend/helpers/amazon.js

@@ -1,6 +1,7 @@
 require('isomorphic-fetch');
-
-var ObjectID = require ('mongodb').ObjectID;
+const config = require('../config');
+var request = require("request");
+var token = require('./token');
 
 
 var getBuildStatus = function(skillID){
@@ -18,45 +19,102 @@ var getBuildStatus = function(skillID){
     }
 }
 
-module.exports = {
-    generateInteractionModel: function(skill){
-        try{
-            let result = {};
-            let allIntents = [];
-            let defaultIntents = [{
-                    name: "AMAZON.CancelIntent",
-                    samples: []
-                    },
-                    {
-                    name: "AMAZON.HelpIntent",
-                    samples: []
-                    },
-                    {
-                    name: "AMAZON.StopIntent",
-                    samples: []
-                    }];
-    
-            /*
-            defaultIntents.map(intent=>{
-                allIntents.push(intent);
-            });
-            */
-    
-            skill.intents.map(intent=>{
-                allIntents.push({name: intent.intentName, samples: intent.questions});
-            });
-    
-            result.interactionModel = {};
-    
-            result.interactionModel.languageModel = {
-                invocationName: skill.invocationName,
-                intents: allIntents
-            };
-    
-            return JSON.stringify(result);
-        }catch(e){
-            console.log("error generate : " + e);
-        }
-    }
+var refreshToken = function(db){
+    return new Promise((resolve, reject)=>{
+        var options = { method: 'POST',
+        url: 'https://api.amazon.com/auth/o2/token',
+        headers: 
+         { 'cache-control': 'no-cache',
+           'content-type': 'application/x-www-form-urlencoded' },
+        form: 
+         { grant_type: 'refresh_token',
+           refresh_token: config.REFRESH_TOKEN,
+           client_id: config.CLIENT_ID,
+           client_secret: config.CLIENT_SECRET } };
+      
+        request(options, function (error, response, body) {
+            if (error) reject(error);
+            parsedResponse = JSON.parse(body);
+            if (parsedResponse.refresh_token){
+                try{
+                    token.updateTokens(parsedResponse.refresh_token, parsedResponse.access_token, parsedResponse.expires_in,db);
+                    resolve();
+                }catch(e){
+                    reject(e);
+                }
+            }
+        });
+    });
+}
 
+var generateInteractionModel = function(skill){
+    let result = {};
+    let allIntents = [];
+    let defaultIntents = [{
+            name: "AMAZON.CancelIntent",
+            samples: []
+            },
+            {
+            name: "AMAZON.HelpIntent",
+            samples: []
+            },
+            {
+            name: "AMAZON.StopIntent",
+            samples: []
+            }];
+
+    /*
+    defaultIntents.map(intent=>{
+        allIntents.push(intent);
+    });
+    */
+
+    skill.intents.map(intent=>{
+        allIntents.push({name: intent.intentName, samples: intent.questions});
+    });
+
+    result.interactionModel = {};
+
+    result.interactionModel.languageModel = {
+        invocationName: skill.invocationName,
+        intents: allIntents
+    };
+
+    return JSON.stringify(result);
+}
+
+var uploadSkill = function(skill){
+    return fetch(`https://api.amazonalexa.com/v0/skills/${skill.skillID}/interactionModel/locales/en-US`, {
+            method: 'POST',
+            headers: {
+                Authorization: config.TOKEN
+            },
+                body: generateInteractionModel(skill)
+            });
+}
+
+module.exports = {
+    updateSkill: function(skill, db){
+        console.log("update skill function");
+
+        return new Promise((resolve,reject)=>{
+            if (new Date() / 1000 > config.TOKEN_EXPIRES_IN){
+                refreshToken(db).then(()=>{
+                    uploadSkill(skill).then(response=>{
+                        resolve(response.status);
+                    });
+                }).catch(e=>{
+                    reject(e);
+                });
+            }else{
+                uploadSkill(skill).then(response=>{
+                    resolve(response.status);
+                }).catch(e=>{
+                    reject(e);
+                })
+            }
+        });
+
+        
+    }
 };