add function map viewer

www/map-import.js

@@ -0,0 +1,97 @@
+(() => {
+  const t = (key, vars) => window.I18n?.t(key, vars) ?? key;
+
+  function fileStem(name) {
+    const base = String(name).replace(/^.*[/\\]/, "");
+    const dot = base.lastIndexOf(".");
+    return dot >= 0 ? base.slice(0, dot) : base;
+  }
+
+  function isYamlFile(file) {
+    return /\.ya?ml$/i.test(file.name);
+  }
+
+  function isMapImageFile(file) {
+    return /\.(png|pgm)$/i.test(file.name);
+  }
+
+  async function matchRosMapFiles(fileList) {
+    const files = Array.from(fileList || []);
+    const yamlFile = files.find(isYamlFile);
+    if (!yamlFile) {
+      throw new Error(t("maps.importNeedYaml"));
+    }
+
+    let imageFile = files.find((f) => f !== yamlFile && isMapImageFile(f));
+    try {
+      const yamlText = await yamlFile.text();
+      const imageRef = yamlText.match(/^image:\s*(\S+)/m)?.[1];
+      if (imageRef) {
+        const refStem = fileStem(imageRef);
+        const matched = files.find(
+          (f) => f !== yamlFile && isMapImageFile(f) && fileStem(f.name) === refStem,
+        );
+        if (matched) imageFile = matched;
+      }
+    } catch {
+      /* best-effort stem match */
+    }
+
+    if (!imageFile) {
+      throw new Error(t("maps.importNeedImage"));
+    }
+
+    return { yamlFile, imageFile };
+  }
+
+  function buildFormData(yamlFile, imageFile, extras = {}) {
+    const form = new FormData();
+    form.append("yaml", yamlFile, yamlFile.name);
+    form.append("image", imageFile, imageFile.name);
+    Object.entries(extras).forEach(([key, value]) => {
+      if (value != null && value !== "") form.append(key, value);
+    });
+    return form;
+  }
+
+  async function apiImport(path, form) {
+    const res = await fetch(path, { method: "POST", credentials: "include", body: form });
+    if (!res.ok) {
+      let msg = res.statusText;
+      try {
+        const err = await res.json();
+        if (err.error) msg = err.error;
+      } catch {
+        /* ignore */
+      }
+      throw new Error(msg);
+    }
+    return res.json();
+  }
+
+  async function importNewMap(fileList, extras = {}) {
+    const { yamlFile, imageFile } = await matchRosMapFiles(fileList);
+    const form = buildFormData(yamlFile, imageFile, {
+      name: extras.name || fileStem(yamlFile.name),
+      site_id: extras.site_id || "",
+      created_by: extras.created_by || "",
+      description: extras.description || "",
+    });
+    return apiImport("/api/maps/import", form);
+  }
+
+  async function importOverwriteMap(mapId, fileList) {
+    const { yamlFile, imageFile } = await matchRosMapFiles(fileList);
+    const form = buildFormData(yamlFile, imageFile);
+    return apiImport(`/api/maps/${encodeURIComponent(mapId)}/import`, form);
+  }
+
+  window.MapImport = {
+    fileStem,
+    isYamlFile,
+    isMapImageFile,
+    matchRosMapFiles,
+    importNewMap,
+    importOverwriteMap,
+  };
+})();