add function map viewer

src/storage/map_store.cpp

@@ -307,6 +307,17 @@ std::optional<std::filesystem::path> MapStore::imagePath(const std::string& id)
   return path;
 }
 
+std::optional<std::filesystem::path> MapStore::yamlPath(const std::string& id) const
+{
+  const auto map = find(id);
+  if (!map || !(*map)["yaml_file"].is_string())
+    return std::nullopt;
+  const auto path = mapDir(id) / map->value("yaml_file", "");
+  if (!std::filesystem::exists(path))
+    return std::nullopt;
+  return path;
+}
+
 bool MapStore::saveImageFile(const std::string& id,
                              const std::string& filename,
                              const std::string& bytes,
@@ -349,4 +360,44 @@ bool MapStore::saveImageFile(const std::string& id,
   return ok;
 }
 
+bool MapStore::saveYamlFile(const std::string& id, const std::string& yaml_text, std::string& err)
+{
+  if (!find(id))
+  {
+    err = "map not found";
+    return false;
+  }
+
+  constexpr const char* kYamlName = "map.yaml";
+  std::error_code ec;
+  std::filesystem::create_directories(mapDir(id), ec);
+  const auto path = mapDir(id) / kYamlName;
+  if (!FileUtil::writeBinaryAtomic(path, yaml_text))
+  {
+    err = "failed to write yaml file";
+    return false;
+  }
+
+  const std::string now = IdUtil::nowIso8601();
+  std::lock_guard<std::mutex> lock(mu_);
+  sqlite3_stmt* stmt = nullptr;
+  if (sqlite3_prepare_v2(db_.handle(),
+                         "UPDATE maps SET yaml_file = ?2, updated_at = ?3 WHERE id = ?1",
+                         -1,
+                         &stmt,
+                         nullptr) != SQLITE_OK)
+  {
+    err = sqlite3_errmsg(db_.handle());
+    return false;
+  }
+  sqlite3_bind_text(stmt, 1, id.c_str(), -1, SQLITE_TRANSIENT);
+  sqlite3_bind_text(stmt, 2, kYamlName, -1, SQLITE_TRANSIENT);
+  sqlite3_bind_text(stmt, 3, now.c_str(), -1, SQLITE_TRANSIENT);
+  const bool ok = sqlite3_step(stmt) == SQLITE_DONE;
+  if (!ok)
+    err = sqlite3_errmsg(db_.handle());
+  sqlite3_finalize(stmt);
+  return ok;
+}
+
 }  // namespace lm