API

- Refactor comments/client id var
- Add basic read endpoint for docs, products, expenses, quotes and invoices

api/v1/expenses/read.php

@@ -0,0 +1,21 @@
+<?php
+
+require_once('../validate_api_key.php');
+require_once('../require_get_method.php');
+
+// Expenses aren't stored against client IDs, so we instead validate the API key is for All Clients
+
+if (isset($_GET['expense_id']) && $client_id == "%") {
+    // Expense via ID (single)
+
+    $id = intval($_GET['expense_id']);
+    $sql = mysqli_query($mysqli, "SELECT * FROM expenses WHERE expense_id = '$id' AND company_id = '$company_id'");
+
+} elseif ($client_id == "%") {
+    // All expenses
+
+    $sql = mysqli_query($mysqli, "SELECT * FROM expenses WHERE company_id = '$company_id' ORDER BY expense_id LIMIT $limit OFFSET $offset");
+}
+
+// Output
+require_once("../read_output.php");