Merge pull request #412 from sjones6/thenify_val

Alternative promiseified `val`

lib/promise.js

@@ -1,10 +1,10 @@
 var Gun = Gun || require('../gun');
 
-Gun.chain.promise = function(field) {
-    var gun = this;
-    return new Promise(function(resolve, reject) {
-        gun.get(field).val(function(node, key) {
-            resolve(node, key);
+Gun.chain.promise = function(cb) {
+    var gun = this, cb = cb || function(ctx) { return ctx };
+    return (new Promise(function(res, rej) {
+        gun.val(function(node, key) {
+            res({val: node, key: key, gun: gun});
         });
-    });
+    })).then(cb);
 };

promise-test.js

@@ -3,18 +3,42 @@ require('./lib/promise');
 
 var gun = new Gun();
 
-gun.get('mark').put({
+/* prep */
+var mark = gun.get('mark').put({
     name: 'mark'
 })
+var cat = gun.get('cat').put({
+    name: 'sylvester'
+});
+mark.get('boss').put(cat);
+cat.get('slave').put(mark);
 
+/* async/await syntax */
 async function getField(field) {
-    var node = await gun.promise(field);
-    console.log(node);
+    var node = await gun.get(field).promise();
+    console.log({1: node.val});
     return node;
 };
 
 setTimeout(async () => {
     var mark = await getField('mark');
-    console.log(mark);
-    process.exit();
-}, 100);
+    console.log({2: mark.val});
+}, 100);
+
+/* chained thens */
+setTimeout(() => {
+    gun.get('mark')
+    .promise(ctx => {
+        console.log({a: ctx.val});
+        return mark.get('boss').promise();
+    })
+    .then(cat => {
+        console.log({b: cat.val});
+        return cat.gun.get('slave').promise();
+    })
+    .then(mark => {
+        console.log({c: mark.val});
+        process.exit();
+    });
+}, 200);
+