From 45f81bbd3bc5987e35c8ae2ea03d4334bd4a8b5a Mon Sep 17 00:00:00 2001
From: Evan Netzer <enetzer@beatsmusic.com>
Date: Wed, 9 Apr 2014 10:29:51 -0700
Subject: [PATCH] added scan/scroll methods to client

---
 lib/client.js | 66 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)

diff --git a/lib/client.js b/lib/client.js
index c9bf72c..70d976d 100644
--- a/lib/client.js
+++ b/lib/client.js
@@ -275,6 +275,72 @@ var client_instance = function (args) {
                     cb(error, [], raw);
                 }
             });
+        },
+
+        scan_search: function (args, cb) {
+            args = merge_defaults(args);
+            args.index = args.index || '';
+            args.type = args.type || '';
+            args.scroll_ttl = args.scroll_ttl || 1;
+
+            var req_args = {
+                method: 'post',
+                path: path.join(args.index, args.type, '_search?search_type=scan&scroll=' + args.scroll_ttl + "m"),
+                body: args.search
+            };
+
+            self.request(req_args, function (err, obj, raw) {
+                if (err) { return cb(err); }
+                if (!obj._scroll_id) {
+                    return cb(null, null, raw);
+                }
+                cb(null, obj._scroll_id, raw);
+            });
+        },
+
+        scroll_search: function (args, cb) {
+            validator.validate_args(args, ['scroll_id'], function (err) {
+                if (err) { return cb(err); }
+
+                args = merge_defaults(args);
+                args.index = args.index || '';
+                args.type = args.type || '';
+                args.scroll_ttl = args.scroll_ttl || 1;
+                args.scroll_id = args.scroll_id;
+                var path = '_search/scroll?scroll_id=' + args.scroll_id + '&scroll=' + args.scroll_ttl + "m";
+
+                var req_args = {
+                    method: 'get',
+                    path: path
+                };
+
+                self.request(req_args, function (err, obj, raw) {
+                    if (err) { return cb(err); }
+                    if (obj && obj.hits && obj.hits.total >= 1) {
+                        var result = {};
+                        result.ids = obj.hits.hits.map(function (row) { return row._id; });
+                        result.objects = obj.hits.hits.map(function (row) { return row._source; });
+                        result.total = obj.hits.total;
+                        result.max_score = obj.hits.max_score;
+                        cb(null, result, raw);
+                    } else {
+                        var error;
+
+                        try {
+                            var parsed = JSON.parse(raw);
+                            if (parsed.error) {
+                                var msg = 'ElasticsearchError: ' + parsed.error;
+                                error = new Error(msg);
+                            }
+                        } catch (e) {
+                            error = new Error('ElasticsearchError: failed to parse JSON:' + util.inspect(raw));
+                        }
+
+                        cb(error, [], raw);
+                    }
+                });
+            });
+
         }
     };