have page script talking to controller

jrx/scratch/old_background.ts

@@ -0,0 +1,92 @@
+/**
+ * JR Controller
+ *
+ * Note that this is a *thread*.  We put our business and storage logic within
+ * this thread.  The reason we do that is we don't want to deal with the
+ * problem of conflicting concurrent writes..
+ *
+ * @module
+ */
+
+
+export type {
+    jr_data,
+    named_keypair,
+    keypair
+}
+
+export {
+    // top-level getters/setters
+};
+
+
+
+/**
+ * The data structure we store
+ */
+type jr_data
+    = {version        : 0,
+       named_keypairs : Array<named_keypair>};
+
+
+
+/**
+ * This is the default {@link jr_data}.
+ *
+ * @private
+ */
+let jr_data_mzero = {version        : 0 as 0,   // yay ts type inference can't infer 0 is of type 0
+                     named_keypairs : []};
+
+
+
+/**
+ * Every keypair has to have a name
+ */
+type named_keypair
+    = {name : string}
+      & keypair;
+
+
+
+/**
+ * From NaCl
+ */
+type keypair
+    = {secretKey : Uint8Array,
+       publicKey : Uint8Array};
+
+
+
+/**
+ * Get the state from the system
+ */
+async function
+fetch_migrate
+    ()
+    : Promise<jr_data>
+{
+    // try to get data
+    let browser_data = await browser.storage.local.get('jr');
+    // test if it's there
+    if (!!(browser_data.jr))
+        return browser_data.jr;
+    // if the data is not there
+    else
+        return jr_data_mzero;
+}
+
+
+
+/**
+ * Put state
+ *
+ * @private
+ */
+async function
+put
+    (state : jr_data)
+    : Promise<void>
+{
+    await browser.storage.local.set({jr: state});
+}