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src/store.js

@@ -125,8 +125,30 @@ function modsIndexFile(id) {
 
 // ---------- installierte Mods (Metadaten je Instanz) ----------
 
+function scanModsDir(id) {
+  const dir = modsDir(id);
+  if (!fs.existsSync(dir)) return [];
+  return fs.readdirSync(dir, { withFileTypes: true })
+    .filter((entry) => entry.isFile() && /\.(jar|zip)$/i.test(entry.name))
+    .sort((a, b) => a.name.localeCompare(b.name))
+    .map((entry) => ({
+      projectId: null,
+      title: entry.name.replace(/\.(jar|zip)$/i, ''),
+      filename: entry.name,
+      versionNumber: 'Importiert',
+    }));
+}
+
 function listMods(id) {
-  return readJson(modsIndexFile(id), []);
+  const indexed = readJson(modsIndexFile(id), []);
+  const merged = new Map();
+  for (const entry of indexed) {
+    if (entry && entry.filename) merged.set(entry.filename, entry);
+  }
+  for (const entry of scanModsDir(id)) {
+    if (!merged.has(entry.filename)) merged.set(entry.filename, entry);
+  }
+  return [...merged.values()];
 }
 
 function addMod(id, entry) {
@@ -230,6 +252,16 @@ function getInstance(id) {
   return readJson(instanceFile(id), null);
 }
 
+function normalizeInstanceName(name) {
+  return String(name || '').trim().toLowerCase();
+}
+
+function findInstanceByName(name) {
+  const needle = normalizeInstanceName(name);
+  if (!needle) return null;
+  return listInstances().find((inst) => normalizeInstanceName(inst.name) === needle) || null;
+}
+
 // Ordnername aus dem Instanznamen ableiten (wie MultiMC), ungültige Zeichen raus
 function slugForName(name) {
   const base = String(name || 'Instanz').trim()
@@ -248,20 +280,43 @@ function uniqueFolderId(name) {
   return id;
 }
 
-function createInstance(data) {
-  const inst = defaultInstance(data && data.name);
-  inst.id = uniqueFolderId(inst.name); // Ordner = Instanzname statt Zufalls-ID
-  if (data) {
-    if (data.icon) inst.icon = data.icon;
-    if (data.minecraft) Object.assign(inst.minecraft, data.minecraft);
-    if (data.notes) inst.notes = data.notes;
-    if (data.group !== undefined) inst.group = data.group;
-  }
+function applyInstanceData(inst, data) {
+  if (!data) return inst;
+  if (data.name) inst.name = data.name;
+  if (data.icon) inst.icon = data.icon;
+  if (data.minecraft) Object.assign(inst.minecraft, data.minecraft);
+  if (data.notes !== undefined) inst.notes = data.notes;
+  if (data.group !== undefined) inst.group = data.group;
+  return inst;
+}
+
+function writeInstance(inst) {
   ensureDir(gameDir(inst.id));
   writeJson(instanceFile(inst.id), inst);
   return inst;
 }
 
+function createInstance(data) {
+  const inst = applyInstanceData(defaultInstance(data && data.name), data);
+  inst.id = uniqueFolderId(inst.name); // Ordner = Instanzname statt Zufalls-ID
+  return writeInstance(inst);
+}
+
+function createOrReplaceImportedInstance(data) {
+  const existing = findInstanceByName(data && data.name);
+  if (!existing) return createInstance(data);
+
+  const inst = applyInstanceData(defaultInstance(data && data.name), data);
+  inst.id = existing.id;
+  inst.created = existing.created || inst.created;
+  inst.lastPlayed = existing.lastPlayed || null;
+  inst.totalPlaySeconds = existing.totalPlaySeconds || 0;
+
+  const p = instancePath(existing.id);
+  if (fs.existsSync(p)) fs.rmSync(p, { recursive: true, force: true });
+  return writeInstance(inst);
+}
+
 function updateInstance(id, patch) {
   const inst = getInstance(id);
   if (!inst) throw new Error('Instanz nicht gefunden: ' + id);
@@ -313,7 +368,9 @@ module.exports = {
   removeMod,
   listInstances,
   getInstance,
+  findInstanceByName,
   createInstance,
+  createOrReplaceImportedInstance,
   updateInstance,
   deleteInstance,
   duplicateInstance,