From ca2a46a8575d66d529accb1ce3aaf97be8f37e2f Mon Sep 17 00:00:00 2001
From: Florian Dold <florian.dold@gmail.com>
Date: Tue, 12 Dec 2017 21:54:14 +0100
Subject: precompute speculative signature for payment

---
 src/query.ts | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

(limited to 'src/query.ts')

diff --git a/src/query.ts b/src/query.ts
index 9889ed13e..b199e0e9c 100644
--- a/src/query.ts
+++ b/src/query.ts
@@ -806,6 +806,38 @@ export class QueryRoot {
                   .then(() => promise);
   }
 
+  /**
+   * Get get objects from a store by their keys.
+   * If no object for a key exists, the resulting position in the array
+   * contains 'undefined'.
+   */
+  getMany<T>(store: Store<T>, keys: any[]): Promise<T[]> {
+    this.checkFinished();
+
+    const { resolve, promise } = openPromise();
+    const results: T[] = [];
+
+    const doGetMany = (tx: IDBTransaction) => {
+      for (const key of keys) {
+        if (key === void 0) {
+          throw Error("key must not be undefined");
+        }
+        const req = tx.objectStore(store.name).get(key);
+        req.onsuccess = () => {
+          results.push(req.result);
+          if (results.length == keys.length) {
+            resolve(results);
+          }
+        };
+      }
+    };
+
+    this.addWork(doGetMany, store.name, false);
+    return Promise.resolve()
+                  .then(() => this.finish())
+                  .then(() => promise);
+  }
+
   /**
    * Get one object from a store by its key.
    */
-- 
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