Adding /api/router/% to allow API queries via path aliases.

Author: serundeputy

headless.module

@@ -1,6 +1,6 @@
 <?php
 /**
- * big module
+ * Headless allows you to use Backdrop CMS as an API.
  */
 function headless_menu() {
   $items = array();
@@ -35,7 +35,17 @@ function headless_menu() {
     'page callback' => 'backdrop_get_form',
     'page arguments' => array('headless_settings_form'),
     'access arguments' => array('administer site configuration'),
-    'file' => 'headless.admin.inc',
+    'file' => 'includes/headless.admin.inc',
+  );
+
+  // Router: allow API queries via string paths.
+  $items['api/router/%'] = array(
+    'title' => 'Headless router',
+    'description' => 'Allow queries via string like /api/my-node-title',
+    'page callback' => 'headless_router',
+    'page arguments' => array(2),
+    'access callback' => TRUE,
+    'file' => 'includes/headless.router.inc',
   );
 
   return $items;

headless.admin.inc renamed to includes/headless.admin.inc

@@ -0,0 +1,40 @@
+<?php
+/**
+ * Router: allow API queries via strings in URL path.
+ *  The router will try to resolve a string to an API asset.
+ */
+
+/**
+ * Resolve a string path to an API asset.
+ *
+ * @param string $path
+ *   The string to try to resolve to an API asset (usually a path).
+ */
+function headless_router(string $path) {
+  $path = filter_xss($path);
+  $assets = [];
+  $query = db_select('url_alias', 'u')
+    ->fields('u', ['source'])
+    ->condition('alias', '%' . db_like($path) . '%', 'LIKE')
+    ->addTag('node_access')
+    ->execute();
+  foreach($query as $i => $asset) {
+    $assets[] = $asset;
+  }
+  $source = $assets[0]->source;
+  $source = explode('/', $source);
+  if ($source[0] == 'node') {
+    $node = node_load($source[1]);
+    $type = $node->type;
+    headless_type($type, $source[1]);
+  }
+  elseif ($source[0] == 'taxonomy') {
+    $term = taxonomy_term_load($source[2]);
+    headless_term_item($term->vocabulary, $source[2]);
+  }
+  else {
+    $error = ['code' => 404];
+    backdrop_json_output($error);
+    backdrop_exit();
+  }
+}