provide basic rest api

homepage/index.php

@@ -1,5 +1,12 @@
 <?php
 
+$requestUri = parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH);
+
+if (strpos($requestUri, '/api/v1/') === 0) {
+  include_once 'scripts/api.php';
+  die();
+}
+
 /* Prevent XSS input */
 $_GET   = filter_input_array(INPUT_GET, FILTER_SANITIZE_STRING);
 $_POST  = filter_input_array(INPUT_POST, FILTER_SANITIZE_STRING);

scripts/api.php

@@ -0,0 +1,43 @@
+<?php
+
+define('__ROOT__', dirname(dirname(__FILE__)));
+require_once(__ROOT__ . '/scripts/common.php');
+
+$requestUri = parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH);
+$requestMethod = $_SERVER['REQUEST_METHOD'];
+
+if ($requestMethod !== 'GET') {
+  sendResponse405();
+}
+
+if (preg_match('#^/api/v1/image/(\S+)$#', $requestUri, $matches)) {
+  if ($config["IMAGE_PROVIDER"] === 'FLICKR') {
+    $image_provider = new Flickr();
+  } else {
+    $image_provider = new Wikipedia();
+  }
+  $sci_name = urldecode($matches[1]);
+  debug_log($sci_name);
+  $result = $image_provider->get_image($sci_name);
+
+  if ($result == false) {
+    http_response_code(404);
+    echo "Error 404! No image found!";
+  } else {
+    http_response_code(200);
+    header('Content-Type: application/json');
+    echo json_encode([
+      "status" => "success",
+      "message" => "successfully image data from database",
+      "data" => $result
+    ]);
+  }
+} else {
+  http_response_code(404);
+  echo "Error 404! No route found!";
+}
+
+function sendResponse405() {
+  http_response_code(405);
+  echo json_encode(["message" => "Method Not Allowed"]);
+}