Added basic markdown page rendering

src/server/logic/Main.php

@@ -0,0 +1,27 @@
+<?php
+
+require_once __DIR__ . '/../lib/parsedown/Parsedown.php';
+
+class Main {
+
+    // Parameters:
+    // - $baseUrl: E.g. 'http://localhost/slim-wiki/'
+    // - $appPath: E.g. '/slim-wiki'
+    // - $requestPathArray: E.g. array('myfolder', 'mypage')
+    public function dispatch($baseUrl, $appPath, $requestPathArray) {
+
+        $articleBaseDir = realpath(__DIR__ . '/../../articles');
+        $articleFilename = $articleBaseDir . '/' . implode('/', $requestPathArray);
+
+        if (($articleFilename == realpath($articleFilename)) && file_exists($articleFilename) && is_readable($articleFilename)) {
+            $articleContent = file_get_contents($articleFilename);
+            $articleMarkup = Parsedown::instance()->text($articleContent);
+            include(__DIR__ . '/../layout/page.php');
+        } else {
+            // TODO: Show error page
+            echo '<p style="color:#990000">File does not exist or is not readable: '.$articleFilename.'</p>';
+        }
+
+    }
+
+}