first commit

core/prepareDateRange.js

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+var _ = require('lodash');
+var prompt = require('prompt-lite');
+var moment = require('moment');
+
+var util = require('./util');
+var config = util.getConfig();
+var dirs = util.dirs();
+var log = require(dirs.core + 'log');
+
+var scan = require(dirs.tools + 'dateRangeScanner');
+
+// helper to store the evenutally detected
+// daterange.
+var setDateRange = function(from, to) {
+  config.backtest.daterange = {
+    from: moment.unix(from).utc().format(),
+    to: moment.unix(to).utc().format(),
+  };
+  util.setConfig(config);
+}
+
+
+module.exports = function(done) {
+  scan((err, ranges) => {
+
+    if(_.size(ranges) === 0)
+      util.die('No history found for this market', true);
+
+    if(_.size(ranges) === 1) {
+      var r = _.first(ranges);
+      log.info('Gekko was able to find a single daterange in the locally stored history:');
+      log.info('\t', 'from:', moment.unix(r.from).utc().format('YYYY-MM-DD HH:mm:ss'));
+      log.info('\t', 'to:', moment.unix(r.to).utc().format('YYYY-MM-DD HH:mm:ss'));
+
+      
+      setDateRange(r.from, r.to);
+      return done();
+    }
+
+    log.info(
+      'Gekko detected multiple dateranges in the locally stored history.',
+      'Please pick the daterange you are interested in testing:'
+    );
+
+    _.each(ranges, (range, i) => {
+      log.info('\t\t', `OPTION ${i + 1}:`);
+      log.info('\t', 'from:', moment.unix(range.from).utc().format('YYYY-MM-DD HH:mm:ss'));
+      log.info('\t', 'to:', moment.unix(range.to).utc().format('YYYY-MM-DD HH:mm:ss'));
+    });
+
+    prompt.get({name: 'option'}, (err, result) => {
+
+      var option = parseInt(result.option);
+      if(option === NaN)
+        util.die('Not an option..', true);
+
+      var range = ranges[option - 1];
+
+      if(!range)
+        util.die('Not an option..', true);
+
+      setDateRange(range.from, range.to);
+      return done();
+    });
+
+  });
+}