Additional inputs for Describe functionality

lib/describe_prompt.php

@@ -0,0 +1,66 @@
+<?php
+require __DIR__ . '/../auth.php';
+mvlog_require_login();
+
+$MVLOG_ROOT = dirname(__DIR__);
+header('Content-Type: application/json; charset=utf-8');
+
+$id = strtolower(trim((string)($_POST['id'] ?? $_GET['id'] ?? '')));
+$job = trim((string)($_POST['job'] ?? $_GET['job'] ?? ''));
+
+function mvlog_article_id_is_valid(string $id): bool {
+    return (bool)preg_match('/^[0-9]{14}[a-f0-9]{16}$/', $id);
+}
+
+function mvlog_legacy_job_is_valid(string $job): bool {
+    return (bool)preg_match('/^[0-9]{8}[-_][A-Za-z0-9._-]+$/', $job);
+}
+
+function mvlog_read_article_id(string $jobdir): string {
+    $path = $jobdir . '/.mvlog-id';
+    if (!is_file($path)) return '';
+    $value = strtolower(trim((string)@file_get_contents($path)));
+    return mvlog_article_id_is_valid($value) ? $value : '';
+}
+
+function mvlog_find_jobdir_by_id(string $mvlogRoot, string $articleId): ?string {
+    if (!mvlog_article_id_is_valid($articleId)) return null;
+
+    $cacheFile = $mvlogRoot . '/cache/articles-index.json';
+    if (is_file($cacheFile)) {
+        $cache = json_decode((string)@file_get_contents($cacheFile), true);
+        if (is_array($cache) && is_array($cache['by_id'] ?? null)) {
+            $name = (string)($cache['by_id'][$articleId] ?? '');
+            if ($name !== '') {
+                $candidate = $mvlogRoot . '/in-dir/' . basename($name);
+                if (is_dir($candidate)) return $candidate;
+            }
+        }
+    }
+
+    foreach (glob($mvlogRoot . '/in-dir/*', GLOB_ONLYDIR) ?: [] as $dir) {
+        if (mvlog_read_article_id($dir) === $articleId) return $dir;
+    }
+
+    return null;
+}
+
+$jobdir = null;
+if ($id !== '' && mvlog_article_id_is_valid($id)) {
+    $jobdir = mvlog_find_jobdir_by_id($MVLOG_ROOT, $id);
+}
+if ($jobdir === null && $job !== '' && mvlog_legacy_job_is_valid($job)) {
+    $candidate = $MVLOG_ROOT . '/in-dir/' . basename($job);
+    if (is_dir($candidate)) $jobdir = $candidate;
+}
+
+if ($jobdir === null || !is_dir($jobdir)) {
+    http_response_code(404);
+    echo json_encode(['status' => 'error', 'message' => 'job not found']);
+    exit;
+}
+
+$path = $jobdir . '/.mvlog-describe-prompt.txt';
+$prompt = is_file($path) ? trim((string)@file_get_contents($path)) : '';
+
+echo json_encode(['status' => 'ok', 'additional_prompt' => $prompt], JSON_UNESCAPED_UNICODE);