first commit

plugins/mongodb/handle.js

@@ -0,0 +1,47 @@
+var mongojs = require('mongojs');
+var mongoUtil = require('./util');
+
+var util = require('../../core/util.js');
+var config = util.getConfig();
+var dirs = util.dirs();
+
+// verify the correct dependencies are installed
+var pluginHelper = require(`${dirs.core}pluginUtil`);
+var pluginMock = {
+  slug: 'mongodb adapter',
+  dependencies: config.mongodb.dependencies
+}
+
+// exit if plugin couldn't be loaded
+var cannotLoad = pluginHelper.cannotLoad(pluginMock);
+if (cannotLoad) {
+  util.die(cannotLoad);
+}
+
+var mode = util.gekkoMode();
+
+var collections = [
+  mongoUtil.settings.historyCollection,
+  mongoUtil.settings.adviceCollection
+]
+
+var connection = mongojs(config.mongodb.connectionString, collections);
+var collection = connection.collection(mongoUtil.settings.historyCollection);
+
+if (mode === 'backtest') {
+  var pair = mongoUtil.settings.pair.join('_');
+
+  collection.find({ pair }).toArray((err, docs) => { // check if we've got any records
+    if (err) {
+      util.die(err);
+    }
+    if (docs.length === 0) {
+      util.die(`History table for ${config.watch.exchange} with pair ${pair} is empty.`);
+    }
+  })
+}
+
+if(mongoUtil.settings.exchange) {
+    collection.createIndex({start: 1, pair: 1}, {unique: true}); // create unique index on "time" and "pair"
+}
+module.exports = connection;