first commit

plugins/sqlite/handle.js

@@ -0,0 +1,58 @@
+var _ = require('lodash');
+var fs = require('fs');
+
+var util = require('../../core/util.js');
+var config = util.getConfig();
+var dirs = util.dirs();
+
+var adapter = config.sqlite;
+
+// verify the correct dependencies are installed
+var pluginHelper = require(dirs.core + 'pluginUtil');
+var pluginMock = {
+  slug: 'sqlite adapter',
+  dependencies: adapter.dependencies,
+};
+
+var cannotLoad = pluginHelper.cannotLoad(pluginMock);
+if (cannotLoad) util.die(cannotLoad);
+
+// should be good now
+if (config.debug) var sqlite3 = require('sqlite3').verbose();
+else var sqlite3 = require('sqlite3');
+
+var plugins = require(util.dirs().gekko + 'plugins');
+
+var version = adapter.version;
+
+var dbName = config.watch.exchange.toLowerCase() + '_' + version + '.db';
+var dir = dirs.gekko + adapter.dataDirectory;
+
+var fullPath = [dir, dbName].join('/');
+
+var mode = util.gekkoMode();
+if (mode === 'realtime' || mode === 'importer') {
+  if (!fs.existsSync(dir)) fs.mkdirSync(dir);
+} else if (mode === 'backtest') {
+  if (!fs.existsSync(dir)) util.die('History directory does not exist.');
+
+  if (!fs.existsSync(fullPath))
+    util.die(
+      `History database does not exist for exchange ${
+        config.watch.exchange
+      } at version ${version}.`
+    );
+}
+
+module.exports = {
+  initDB: () => {
+    var journalMode = config.sqlite.journalMode || 'PERSIST';
+    var syncMode = journalMode === 'WAL' ? 'NORMAL' : 'FULL';
+  
+    var db = new sqlite3.Database(fullPath);
+    db.run('PRAGMA synchronous = ' + syncMode);
+    db.run('PRAGMA journal_mode = ' + journalMode);
+    db.configure('busyTimeout', 10000);
+    return db;
+  }
+};