1 files changed, 54 insertions, 0 deletions
diff --git a/client/src/lib/config.ts b/client/src/lib/config.ts
new file mode 100644
index 0000000..fccb09d
--- /dev/null
+++ b/client/src/lib/config.ts
@@ -0,0 +1,54 @@
+import { browser } from '$app/environment';
+import type { Infer } from 'superstruct';
+import { assert, object, optional, number, string } from 'superstruct';
+
+const Config = object({
+  active_project: optional(string())
+});
+
+type Config = Infer<typeof Config>;
+
+const CachedConfig = object({
+  config: Config,
+  expires: number()
+});
+
+type CachedConfig = Infer<typeof CachedConfig>;
+
+const CACHE_TTL = 10 * 60 * 60 * 1000;
+
+async function get_config(): Promise<Config> {
+  // Cache, might be outdated but saves on call to server
+  if (browser) {
+    try {
+      // TODO: Use async localStorage
+      const stored = localStorage.getItem('config');
+      if (stored !== null) {
+        const cached: CachedConfig = JSON.parse(stored);
+        assert(cached, CachedConfig);
+        if (cached.expires < Date.now()) {
+          // TODO: Should we update expires here?
+          // If page is in use we probably don't need to sync for a while.
+          return cached.config;
+        }
+      }
+    } catch {
+      // ignore errors
+    }
+  }
+
+  // Default config
+  // eslint-disable-next-line prefer-const
+  let config: Config = { active_project: undefined };
+
+  // TODO: Fetch config
+
+  if (browser) {
+    const cached: CachedConfig = { config: config, expires: Date.now() + CACHE_TTL };
+    // TODO: Use async localStorage
+    localStorage.setItem('config', JSON.stringify(cached));
+  }
+  return config;
+}
+
+export { type Config, get_config };