Refactor POST handling.

- Split into admin and user handlers, each admin page gets its own file now
- Enforce role access once for admin POST requests
- Automatically load POST logic for admin-based requests based on the referring page, otherwise automatically load all user request logic
- Add support for using custom POST handlers

post/user/location_model.php

@@ -0,0 +1,14 @@
+<?php
+$client_id = intval($_POST['client_id']);
+$name = sanitizeInput($_POST['name']);
+$description = sanitizeInput($_POST['description']);
+$country = sanitizeInput($_POST['country']);
+$address = sanitizeInput($_POST['address']);
+$city = sanitizeInput($_POST['city']);
+$state = sanitizeInput($_POST['state']);
+$zip = sanitizeInput($_POST['zip']);
+$phone = preg_replace("/[^0-9]/", '',$_POST['phone']);
+$hours = sanitizeInput($_POST['hours']);
+$notes = sanitizeInput($_POST['notes']);
+$contact = intval($_POST['contact']);
+$location_primary = intval($_POST['location_primary']);