feat(location): introduce a public API for location providers

apps/nominatim/appinfo/info.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0"?>
+<info xmlns:xsi= "http://www.w3.org/2001/XMLSchema-instance"
+	  xsi:noNamespaceSchemaLocation="https://apps.nextcloud.com/schema/apps/info.xsd">
+	<id>nominatim</id>
+	<name>Nominatim OpenStreetMap</name>
+	<summary>Location provider for the Nominatim OpenStreetMap backend</summary>
+	<description><![CDATA[A location provider based on the Nominatim OpenStreetMap service. This provider does not allow for autocomplete. The nominatim server endpoint can be configured by admins.]]></description>
+	<version>0.1.0</version>
+	<licence>agpl</licence>
+	<author mail="nextcloud@tcit.fr">Thomas Citharel</author>
+	<namespace>Nominatim</namespace>
+	<category>integration</category>
+	<category>location</category>
+	<bugs>https://github.com/nextcloud/server</bugs>
+	<dependencies>
+		<nextcloud min-version="28" max-version="28"/>
+	</dependencies>
+</info>

apps/nominatim/appinfo/routes.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2023, Thomas Citharel
+ *
+ * @author Thomas Citharel <nextcloud@tcit.fr>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+return [];

apps/nominatim/composer/autoload.php

@@ -0,0 +1,25 @@
+<?php
+
+// autoload.php @generated by Composer
+
+if (PHP_VERSION_ID < 50600) {
+    if (!headers_sent()) {
+        header('HTTP/1.1 500 Internal Server Error');
+    }
+    $err = 'Composer 2.3.0 dropped support for autoloading on PHP <5.6 and you are running '.PHP_VERSION.', please upgrade PHP or use Composer 2.2 LTS via "composer self-update --2.2". Aborting.'.PHP_EOL;
+    if (!ini_get('display_errors')) {
+        if (PHP_SAPI === 'cli' || PHP_SAPI === 'phpdbg') {
+            fwrite(STDERR, $err);
+        } elseif (!headers_sent()) {
+            echo $err;
+        }
+    }
+    trigger_error(
+        $err,
+        E_USER_ERROR
+    );
+}
+
+require_once __DIR__ . '/composer/autoload_real.php';
+
+return ComposerAutoloaderInitNominatim::getLoader();

apps/nominatim/composer/composer.json

@@ -0,0 +1,13 @@
+{
+    "config" : {
+        "vendor-dir": ".",
+        "optimize-autoloader": true,
+        "classmap-authoritative": true,
+        "autoloader-suffix": "Nominatim"
+    },
+    "autoload" : {
+        "psr-4": {
+            "OCA\\Nominatim\\": "../lib/"
+        }
+    }
+}