NeDB integration #85 (#87)

* Add module

* Add database paths

* Initialize databases

server/package.json

@@ -23,6 +23,7 @@
     "@types/koa": "^2.0.45",
     "@types/koa-bodyparser": "^4.2.0",
     "@types/koa-router": "^7.0.28",
+    "@types/nedb": "^1.8.0",
     "axios": "^0.18.0",
     "babel-core": "^6.26.3",
     "babel-loader": "^7.1.4",
@@ -35,6 +36,7 @@
     "koa": "^2.5.1",
     "koa-bodyparser": "^4.2.1",
     "koa-router": "^7.4.0",
+    "nedb": "^1.8.0",
     "node-loader": "^0.6.0",
     "nodemon": "^1.17.5",
     "ts-loader": "^4.4.1",

server/src/config.ts

@@ -10,6 +10,10 @@ export const ANALYTICS_PATH = path.join(__dirname, '../../analytics');
 
 export const DATA_PATH = path.join(__dirname, '../../data');
 
+export const ANALYTIC_UNITS_DATABASE_PATH = path.join(DATA_PATH, 'analyticUnits.db');
+export const METRICS_DATABASE_PATH = path.join(DATA_PATH, 'metrics.db');
+export const SEGMENTS_DATABASE_PATH = path.join(DATA_PATH, 'segments.db');
+
 export const DATASETS_PATH = path.join(DATA_PATH, 'datasets');
 export const ANALYTIC_UNITS_PATH = path.join(DATA_PATH, 'analytic_units');
 export const MODELS_PATH = path.join(DATA_PATH, 'models');

server/src/services/data_service.ts

@@ -1,7 +1,13 @@
 import * as config from '../config'
 
+import * as nedb from 'nedb';
 import * as fs from 'fs';
 
+export const db = {
+  analyticUnits: new nedb({ filename: config.ANALYTIC_UNITS_DATABASE_PATH, autoload: true }),
+  metrics: new nedb({ filename: config.METRICS_DATABASE_PATH, autoload: true }),
+  segments: new nedb({ filename: config.SEGMENTS_DATABASE_PATH, autoload: true })
+};
 
 // see analytics/pattern_detection_model.py with folders available