From 42fe17f3e52be163a506bf9a3953aa8adb5fd64f Mon Sep 17 00:00:00 2001
From: Sean Fridman <fridman@mail.sfsu.edu>
Date: Thu, 9 Jul 2015 16:58:02 -0400
Subject: Implement groupBy queries + admin interface

---
 app/node_modules/okquery/index.js | 43 ++++++++++++++++++++++++++++++++++++++-
 1 file changed, 42 insertions(+), 1 deletion(-)

(limited to 'app/node_modules/okquery/index.js')

diff --git a/app/node_modules/okquery/index.js b/app/node_modules/okquery/index.js
index 4051f95..09d867d 100644
--- a/app/node_modules/okquery/index.js
+++ b/app/node_modules/okquery/index.js
@@ -43,10 +43,17 @@ function OKQuery(options) {
     enumerable: true
   });
 
+  Object.defineProperty(this, 'groupBy', {
+    value: options.groupBy,
+    writable: false,
+    enumerable: true
+  })
+
   this.get = createQuery(resource, query, {
     default: options.default,
     sortField: sortField,
-    descending : descending
+    descending : descending,
+    groupBy: options.groupBy
   });
 }
 
@@ -66,6 +73,9 @@ function createQuery(resource, query, options) {
   if (options.default) {
     query = withDefault(query, options.default);
   }
+  if (options.groupBy) {
+    query = withGrouping(query, options.groupBy)
+  }
   return query;
 }
 
@@ -124,6 +134,37 @@ function queryBound(resource) {
   };
 }
 
+/**
+ * Transform the query such that the results are grouped by the
+ * given field
+ */
+function withGrouping(queryFn, groupField) {
+  return function() {
+    return Q.Promise(function(resolve, reject) {
+      queryFn().then(function(data) {
+        data = data || []
+        if (typeof data.length === 'undefined') {
+          data = [data]
+        }
+        var result = {}
+        result[groupField] = data.reduce(reduceToGroups, {})
+        resolve(result)
+      }, reject)
+    })
+  }
+
+  function reduceToGroups(acc, data) {
+    var groupName = data[groupField]
+    if (groupName) {
+      if (!acc[groupName]) {
+        acc[groupName] = []
+      }
+      acc[groupName].push(data)
+    }
+    return acc
+  }
+}
+
 function withDefault(queryFn, resultDefault) {
   return function() {
     return Q.Promise(function(resolve, reject) {
-- 
cgit v1.2.3-70-g09d2