feat: add webdav support

app/utils/cloud/upstash.ts

@@ -0,0 +1,39 @@
+import { SyncStore } from "@/app/store/sync";
+
+export type UpstashConfig = SyncStore["upstash"];
+export type UpStashClient = ReturnType<typeof createUpstashClient>;
+
+export function createUpstashClient(config: UpstashConfig) {
+  return {
+    async check() {
+      return true;
+    },
+
+    async get() {
+      throw Error("[Sync] not implemented");
+    },
+
+    async set() {
+      throw Error("[Sync] not implemented");
+    },
+
+    headers() {
+      return {
+        Authorization: `Basic ${config.apiKey}`,
+      };
+    },
+    path(path: string) {
+      let url = config.endpoint;
+
+      if (!url.endsWith("/")) {
+        url += "/";
+      }
+
+      if (path.startsWith("/")) {
+        path = path.slice(1);
+      }
+
+      return url + path;
+    },
+  };
+}