From 99b3febe868bf12eed6bfc0958021d1f18023201 Mon Sep 17 00:00:00 2001
From: Tyler Renelle <tylerrenelle@gmail.com>
Date: Sat, 21 Dec 2013 20:03:14 -0700
Subject: [PATCH] restore NaN history entries (@djuretic thanks!)

---
 migrations/20131221_restore_NaN_history.js | 45 ++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 migrations/20131221_restore_NaN_history.js

diff --git a/migrations/20131221_restore_NaN_history.js b/migrations/20131221_restore_NaN_history.js
new file mode 100644
index 0000000000..b96af1462c
--- /dev/null
+++ b/migrations/20131221_restore_NaN_history.js
@@ -0,0 +1,45 @@
+// node .migrations/20131221_restore_NaN_history.js
+
+/**
+ * After the classes migration, users lost some history entries
+ */
+var mongo = require('mongoskin');
+var _ = require('lodash');
+
+var backupUsers = mongo.db('localhost:27017/habitrpg_old?auto_reconnect').collection('users');
+var liveUsers = mongo.db('localhost:27017/habitrpg?auto_reconnect').collection('users');
+
+function filterNaNs(h) {
+  return h && _.isNumber(+h.value) && !_.isNaN(+h.value);
+}
+
+var fields = {history:1,habits:1,dailys:1,migration:1};
+var count = 0;
+liveUsers.findEach({migration: {$ne:'20131221_restore_NaN_history'}}, fields, {batchSize:500}, function(err, after){
+  if (!after) err = '!after';
+  if (err) {count++;return console.error(err);}
+
+  backupUsers.findById(after._id, fields, function(err, before){
+    if (err) {count++;return console.error(err);}
+
+    _.each(['todos','exp'],function(type){
+      if (!_.isEmpty(after.history[type]))
+        after.history[type] = _.filter(after.history[type], filterNaNs);
+      if (before && !_.isEmpty(before.history[type]))
+        after.history[type] = before.history[type].concat(after.history[type]);
+    })
+
+    _.each(['habits','dailys'], function(type){
+      _.each(after[type], function(t){
+        t.history = _.filter(t.history, filterNaNs);
+        var found = before && _.find(before[type],{id:t.id});
+        if (found && found.history) t.history = found.history.concat(t.history);
+      })
+    })
+
+    liveUsers.update({_id:after._id}, {$set:{history:after.history, dailys:after.dailys, habits:after.habits, migration:'20131221_restore_NaN_history'}, $inc:{_v:1}});
+    //if (--count <= 0) console.log("DONE! " + after._id);
+    if (++count%1000 == 0) console.log(count);
+    if (after._id == '9') console.log('lefnire processed');
+  })
+});
\ No newline at end of file