Update README.md

Proejct1_FLO_FB_Auth_Exchange/README.md

@@ -1 +1,47 @@
-# You have to convert Facebook based authentication to FLO based authentication
+# What are different files here
+customer.sql is the customer table where authentication information is stored
+ranchi8_exchange_test.sql is the ful MySQL database with test data
+Exchange_PHP_code.zip has the full PHP code 
+
+# Main Task
+  >  You have to convert Facebook based authentication to FLO based authentication
+
+# Notes
+Currently, the user gets the authentcation clearance for Facebook using fb_config.php, and it sets login status to unity
+
+customer is the table with all the users
+There is no session information stored in Database currently
+It only has action or not active
+
+So session and login tokens are not stored in DB
+We do not have record of when was login made
+
+DB Name is ranchi8_flexchange8
+
+==
+CHECKLOGINSTATUS
+checkLoginStatus()
+  
+EVERY FILES HAS THIS ON TOP
+ require_once '../includes/imp_files.php';
+    
+   if (!checkLoginStatus()) {
+        return false;
+    }
+
+AND THIS IS HOW THE LOGIN STATUS IS CHECKED
+
+function checkLoginStatus() {
+    if(!isset($_SESSION['fb_id']) || !isset($_SESSION['user_id']) || !isset($_SESSION['user_name'])) {
+        return false;
+    }
+    return true;
+}
+
+==
+
+WE ARE INTERESTED IN THIS fb_id
+
+isset($_SESSION['fb_id'])
+
+fb_id is a field in database