organic: Enhance external apis

www/organic/external/index.php

@@ -0,0 +1,45 @@
+<?php
+
+$APIS = [
+    'bioc' => ['id' => 'bioc', 'endpoints' => ['https://elwig.at/organic/external/bioc/operators']],
+    'bioqs' => ['id' => 'bioqs', 'endpoints' => ['https://elwig.at/organic/external/bioqs/operators', 'https://elwig.at/organic/external/bioqs/attachments']],
+    'easy-cert' => ['id' => 'easy-cert', 'endpoints' => ['https://elwig.at/organic/external/easy-cert/operators']],
+    'lkv' => ['id' => 'lkv', 'endpoints' => ['https://elwig.at/organic/external/lkv/operators']],
+];
+
+function jenc($data): string {
+    return json_encode($data, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);
+}
+
+header('Access-Control-Allow-Origin: *');
+header('Content-Type: application/json; charset=UTF-8');
+
+if ($_SERVER['REQUEST_METHOD'] !== 'GET' && $_SERVER['REQUEST_METHOD'] !== 'HEAD') {
+    header('Status: 405');
+    header('Content-Length: 56');
+    header('Allow: GET, HEAD');
+    echo "{\"error\":\"method not allowed\",\"allow\":[\"GET\",\"HEAD\"]}\n";
+    exit;
+}
+
+if ($_SERVER['PATH_INFO'] !== '') {
+    $code = rtrim(substr($_SERVER['PATH_INFO'], 1), '/');
+    header('Content-Type: application/json; charset=UTF-8');
+    if (array_key_exists($code, $APIS)) {
+        echo jenc($APIS[$code]);
+        echo "\n";
+        exit;
+    }
+    header('Status: 404');
+    header('Content-Length: 22');
+    echo "{\"error\":\"not found\"}\n";
+}
+
+echo "{\"apis\":[\n";
+$first = true;
+foreach ($APIS as $api) {
+    if (!$first) echo ",\n";
+    echo "  " . jenc($api);
+    $first = false;
+}
+echo "\n]}\n";