fix: Do not require uri if redisClient object provided.

lib/index.js

@@ -13,12 +13,22 @@ const adaptors = {
 
 const { SYNC } = core;
 const init = options => {
-  const { uri, deserialize, serialize } = options;
+  const { uri, deserialize, serialize, redisClient } = options;
 
-  if (!uri) {
-    throw new Error('A `uri` option with the database connection string has to be provided to feathers-sync');
+  if (!uri && !redisClient) {
+    throw new Error('A `uri` option with the database connection string, or a `redisClient` object has to be provided to feathers-sync');
   }
 
+  let adapter;
+
+  if (redisClient) {
+    if (typeof redisClient !== "object") {
+      throw new Error('`redisClient` option provided to feathers-sync is not an object');
+    }
+
+    adapter = adaptors["redis"];
+  }  
+
   if (deserialize && typeof deserialize !== 'function') {
     throw new Error('`deserialize` option provided to feathers-sync is not a function');
   }
@@ -27,14 +37,16 @@ const init = options => {
     throw new Error('`serialize` option provided to feathers-sync is not a function');
   }
 
-  const { protocol } = new URL(uri);
-  const name = protocol.substring(0, protocol.length - 1);
-  const identifiedProtocolName = Object.keys(adaptors).filter((adaptor) => name.indexOf(adaptor) !== -1 ? adaptor : null);
-  const adapter = adaptors[identifiedProtocolName];
+  if (typeof adapter !== "function") {
+    const { protocol } = new URL(uri);
+    const name = protocol.substring(0, protocol.length - 1);
+    const identifiedProtocolName = Object.keys(adaptors).filter((adaptor) => name.indexOf(adaptor) !== -1 ? adaptor : null);
+    adapter = adaptors[identifiedProtocolName];
 
-  if (!adapter) {
-    throw new Error(`${name} is an invalid adapter (uri ${uri})`);
-  }
+    if (typeof adapter !== "function") {
+      throw new Error(`${name} is an invalid adapter (uri ${uri})`);
+    }
+  }  
 
   return adapter({
     serialize: JSON.stringify,
@@ -49,4 +61,4 @@ module.exports = init;
 Object.assign(module.exports, adaptors, {
   default: init,
   SYNC
-});
+});