From 8f3b3036df71113f8be00f21f1e5026b0c039eab Mon Sep 17 00:00:00 2001
From: Will Thompson <will@willthompson.co.uk>
Date: Mon, 14 Sep 2015 21:29:02 +0200
Subject: [PATCH] Support autocomplete from a group of layers

The idea here is to have several layers which share a set of tags. This
mirrors what we already have if several layers reference the same type
of entity. You might have config like this:

        {
            "id": "keywords",
            "title": "Keywords",
            "canAddAnnotations": {"member": true, "staff": true, "admin": true},
            "item": "Keyword",
            "overlap": true,
            "type": "string",
            "autocomplete": true,
            "autocompleteKeys": ["keywords", "minorkeywords"]
        },
        {
            "id": "minorkeywords",
            "title": "Minor Keywords",
            "canAddAnnotations": {"member": true, "staff": true, "admin": true},
            "item": "Keyword",
            "overlap": true,
            "type": "string",
            "autocomplete": true,
            "autocompleteKeys": ["keywords", "minorkeywords"]
        },

Now, adding new keywords in either bin will offer autocompletions from
the union of the two layers. The other option would be to do this on the
server side, but I thought this was a less invasive way to achieve this.
---
 static/js/editor.js | 26 +++++++++++++++++++-------
 1 file changed, 19 insertions(+), 7 deletions(-)

diff --git a/static/js/editor.js b/static/js/editor.js
index ff421f69..5cc255d3 100644
--- a/static/js/editor.js
+++ b/static/js/editor.js
@@ -55,13 +55,25 @@ pandora.ui.editor = function(data) {
                             })
                         } : layer.autocomplete
                         ? function(key, value, callback) {
-                            pandora.api.autocomplete({
-                                key: key,
-                                operator: '=',
-                                range: [0, 20],
-                                value: value
-                            }, function(result) {
-                                callback(result.data.items);
+                            var keys = layer.autocompleteKeys && layer.autocompleteKeys.length
+                                ? layer.autocompleteKeys
+                                : [key];
+                            var n = keys.length;
+                            var itemss = [];
+
+                            keys.forEach(function(key) {
+                                pandora.api.autocomplete({
+                                    key: key,
+                                    operator: '=',
+                                    range: [0, 20],
+                                    value: value
+                                }, function(result) {
+                                    n--;
+                                    itemss.push(result.data.items);
+                                    if (n == 0) {
+                                        callback(Ox.unique(Ox.flatten(itemss)));
+                                    }
+                                });
                             });
                         } : null
                 });