From 8883eacd2a5e2f3f5637a6b71123dfcb2a64c3d5 Mon Sep 17 00:00:00 2001
From: Indrajith K L
Date: Thu, 12 Dec 2019 19:31:50 +0530
Subject: :fire: :zap: Major Update * Adds Actions, Redicers and Middlewares *
 Adds Http Service * Adds Cancel option for Http Service * Adds HOC's for API
 Loader, Sidebar and Headers * Adds Random key generator for Routes

---
 src/services/http.service.js    | 90 +++++++++++++++++++++++++++++++++++++++++
 src/services/selectors.js       | 10 +++++
 src/services/storage.service.js |  3 +-
 3 files changed, 102 insertions(+), 1 deletion(-)
 create mode 100644 src/services/selectors.js

(limited to 'src/services')

diff --git a/src/services/http.service.js b/src/services/http.service.js
index e69de29..c3914f6 100644
--- a/src/services/http.service.js
+++ b/src/services/http.service.js
@@ -0,0 +1,90 @@
+import axios from 'axios';
+import Storage from './storage.service';
+import { COMMON_REQUEST, COMMON_SUCCESS, COMMON_CANCEL } from '../utils/constants';
+
+class HttpServiceSingleton {
+    constructor() {
+        axios.defaults.headers.post["Content-Type"] = "application/json";
+        axios.defaults.headers.put["Accept"] = "application/json";
+        this.count = 0; // This will store API requests
+        this.complete = 0; // This will store API Success/errors        
+    }
+
+    set reduxStore(store) {
+        this.store = store;
+    }
+
+    fetch(payload, noAuth) {
+        const cancelToken = axios.CancelToken;
+        this.cancelSource = cancelToken.source();
+        let config = {};
+        if (!noAuth) {
+            let token = Storage.get("token");
+            config.headers = {
+                'Authirization': `Bearer ${token}`
+            };
+        }
+
+        config.method = payload.method ? payload.method : 'get';
+        config.url = payload.url ? payload.url : '';
+        config.cancelToken = this.cancelSource.token;
+        if (payload.data) config.data = JSON.stringify(payload.data);
+
+        return axios(config).catch((thrown) => {
+            if (axios.isCancel(thrown)) {
+                this.count = 0;
+                this.complete = 0;
+                this.store.dispatch({
+                    type: COMMON_CANCEL
+                });
+                console.log('Request canceled', thrown.message);
+            } else {
+                // handle error
+            }
+        });
+    }
+
+    httpInterceptor() {
+        axios.interceptors.request.use((config) => {
+            this.count++;
+            this.checkApiComplete(this.store);
+            return config;
+        }, (error) => {
+            this.complete++;
+            this.checkApiComplete(this.store);
+            return Promise.reject(error);
+        });
+
+        axios.interceptors.response.use((response) => {
+            this.complete++;
+            this.checkApiComplete(this.store);
+            return response;
+        }, (error) => {
+            this.complete++;
+            this.checkApiComplete(this.store);
+            return Promise.reject(error);
+        });
+    }
+
+    cancelRequest() {
+        this.cancelSource.cancel();
+    }
+
+    //Fallback to cancel all API loaders in case of multiple API call occuts
+    checkApiComplete(store) {
+        if (this.count == this.complete) { // Cancel API loader when all requests are completed
+            store.dispatch({
+                type: COMMON_SUCCESS
+            });
+        } else {
+            store.dispatch({
+                type: COMMON_REQUEST
+            });
+        }
+    }
+}
+
+const HttpService = new HttpServiceSingleton();
+// Object.freeze(HttpService); // Singleton Http Service
+
+export default HttpService;
\ No newline at end of file
diff --git a/src/services/selectors.js b/src/services/selectors.js
new file mode 100644
index 0000000..f9942d4
--- /dev/null
+++ b/src/services/selectors.js
@@ -0,0 +1,10 @@
+import _ from "lodash";
+
+export const createLoadingSelector = actions => state => {
+  return _(actions).some(action => _.get(state, `loading.${action}`));
+};
+
+export const createNotificationSelector = actions => state => {
+  return _(actions)
+      .some(action => _.get(state, `error.${action}`));
+};
diff --git a/src/services/storage.service.js b/src/services/storage.service.js
index c41d552..d29a1e5 100644
--- a/src/services/storage.service.js
+++ b/src/services/storage.service.js
@@ -9,7 +9,8 @@ class Storage{
         if(!key||!value){
             throw("Storag.set expects a 'key' and a 'value' - 'value' & 'key' can't be null");            
         }
-        localStorage.setItem(key, JSON.stringify(value));
+        value = (typeof value=="string") ?  value : JSON.stringify(value);
+        localStorage.setItem(key, value);
     }
 }
 
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