Adding and/or

Author: rynobax

src/helper.ts

@@ -3,3 +3,23 @@ import * as merge from "deepmerge";
 // Helper function to combine multiple resolver definition hashes into a single hash for consumption by Apollostack's graphql-server
 export const combineResolvers = (resolvers = []) => resolvers
   .reduce((combined, resolver) => merge(combined, resolver));
+
+export const and = (...conditions) => resolver => {
+  return conditions.reduceRight((p, c) => {
+    return c.createResolver(p);
+  }, resolver)
+}
+
+export const or = (...conditions) => resolver => (...query) => {
+  return new Promise((resolve, reject) => {
+    let limit = conditions.length - 1;
+    const attempt = (i) =>
+      conditions[limit - i].createResolver(resolver)(...query)
+        .then(res => resolve(res))
+        .catch(err => {
+          if(i === limit) reject(err);
+          else attempt(i + 1);
+        });
+    attempt(0);
+  });
+}