First steps to integrating with OPS API

config.env.template

@@ -7,3 +7,10 @@ SOLR_HOSTNAME=
 SOLR_PORT=
 # Solr core
 SOLR_CORE=
+
+# OPS API variables
+# Hostname for OPS API, usually https://ops.epo.org
+OPS_URL=
+# API credentials from OPS https://developers.epo.org/
+CONSUMER_KEY=
+CONSUMER_SECRET=

site/ops_api.php

@@ -0,0 +1,52 @@
+<?php
+
+function get_access_token() {
+
+  // OPS API credentials (details at http://documents.epo.org/projects/babylon/eponet.nsf/0/F3ECDCC915C9BCD8C1258060003AA712/$File/ops_v3.2_documentation_-_version_1.3.16_en.pdf)
+  $ops_url = $_ENV["OPS_URL"] . '3.2/auth/accesstoken';
+  $auth = base64_encode($_ENV["CONSUMER_KEY"] . ":" . $_ENV["CONSUMER_SECRET"]);
+
+  // Set up API call
+  $ch = curl_init();
+  curl_setopt($ch, CURLOPT_URL, $ops_url);
+  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+  curl_setopt($ch, CURLOPT_HTTPHEADER, array("Authorization: Basic $auth","Content-Type: application/x-www-form-urlencoded"));
+  curl_setopt($ch, CURLOPT_POSTFIELDS, 'grant_type=client_credentials');
+  curl_setopt($ch, CURLOPT_POST, true);
+
+  // Give back curl result
+  $response = curl_exec($ch);
+  curl_close($ch);
+
+  // Turn the API response into useful Json
+  $json = json_decode($response);
+  $access_token = $json->access_token;
+
+  return $access_token;
+
+}
+
+function get_publication_details($document_reference) {
+
+  $access_token = get_access_token();
+
+  // OPS API credentials (details at http://documents.epo.org/projects/babylon/eponet.nsf/0/F3ECDCC915C9BCD8C1258060003AA712/$File/ops_v3.2_documentation_-_version_1.3.16_en.pdf)
+  $ops_url = $_ENV["OPS_URL"] . 'rest-services/published-data/publication/epodoc/' . $document_reference . '/biblio';
+
+  // Set up API call
+  $ch = curl_init();
+  curl_setopt($ch, CURLOPT_URL, $ops_url);
+  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+  curl_setopt($ch, CURLOPT_HTTPHEADER, array("Authorization: Bearer $access_token"));
+
+  // Give back curl result
+  $response = curl_exec($ch);
+  curl_close($ch);
+
+  if (strpos($response,"No results found") === false ) {
+    print_r($response);
+  }
+
+}
+
+?>

site/public/index.php

@@ -1,21 +1,34 @@
 <?php
 
 include '../random.php';
+include '../ops_api.php';
 
 $random_record = random_record();
 
 ?>
 
-ID:
+Document reference no.:
 
 <?php
 
-echo $random_record['id']
+echo $random_record['doc_ref'];
 
 ?>
 
 <br><br>
 
+<?php
+
+  if (get_publication_details($random_record['doc_ref'])):
+
+?>
+
+<br><br>
+
+<?php
+  endif;
+?>
+
 Application ID:
 
 <?php

site/random.php

@@ -28,8 +28,8 @@ function random_record (){
   $content = $json->response->docs[$random]->content;
 
   //Set document reference number (used for OPS API)
-
-  $output['id'] = $json->response->docs[$random]->id;;
+  preg_match('/=D\s(([^\s]*)\s([^\s]*)\s([^\s]*))/', $content, $doc_ref);
+  $output['doc_ref'] = str_replace(' ','',$doc_ref[1]);
 
   // Search for the application ID in the content element and display it
   preg_match('/Application.*\n(.*)\n/', $content, $application_id);