Added first import of js-framework

Author: djthorpe

.gitignore

@@ -1,5 +1,3 @@
-# Logs
-logs
 *.log
 npm-debug.log*
 yarn-debug.log*

js/provider.js

@@ -1,7 +1,59 @@
 // Provider class to be subclassed by an actual provider
 
+import Error from './error';
+
+// ////////////////////////////////////////////////////////////////////////////
+// CONSTANTS
+
+const EVENT_COMPLETED = "mvc.provider.completed";
+const EVENT_ERROR = "mvc.provider.error";
+
+// ////////////////////////////////////////////////////////////////////////////
+// PROVIDER CLASS
+
 export default class Provider {
   constructor(root) {
     this.$root = root;
   }
+  
+  $fetch(url, req, userInfo) {
+    var status;
+    window.fetch(this.$root + url, req).then(response => {
+      status = response;
+      switch (status.headers.get("Content-Type").split(";")[0]) {
+        case "application/json":
+        case "text/json":
+          return response.json();
+        case "text/plain":
+          return response.text();
+        default:
+          return response.blob();
+      }
+    }).then(data => {
+      if (!status.ok) {
+        if (typeof (data) == "object" && data.reason) {
+          throw new Error(data.reason, data.code);
+        } else {
+          throw new Error(status.statusText, status.status);
+        }
+      } else if (typeof (data) == "object" && Array.isArray(data)) {
+        this.$array(data);
+      } else {
+        this.$object(data);
+      }
+    }).then(() => {
+      document.dispatchEvent(new Event(EVENT_COMPLETED, {
+        userInfo: userInfo,
+      }));
+    }).catch(error => {
+      if (error instanceof Error) {
+        document.dispatchEvent(new Event(EVENT_ERROR, {
+          userInfo: userInfo,
+          error: error,
+        }));
+      } else {
+        throw error;
+      }
+    });
+  }
 }