strategies should be fetched from DB

lib/strategyApi.js

@@ -1,3 +1,5 @@
+var strategyDb = require('./strategyDb');
+
 var strategies = [
     {
         name: "default",
@@ -21,8 +23,10 @@ function byName(name) {
 module.exports = function (app) {
 
     app.get('/strategies', function (req, res) {
+        strategyDb.getStrategies().then(function (strategies) {
             res.json({strategies: strategies});
         });
+    });
 
     app.get('/strategies/:name', function (req, res) {
         var strategy = byName(req.params.name);

lib/strategyDb.js

@@ -0,0 +1,56 @@
+var eventStore      = require('./eventStore');
+var eventType       = require('./eventType');
+var logger          = require('./logger');
+var knex            = require('./dbPool');
+var STRATEGY_COLUMNS = ['name', 'description', 'parameters_template'];
+
+eventStore.on(eventType.strategyCreated, function (event) {
+    knex('strategies')
+        .insert(eventToRow(event))
+        .catch(function (err) {
+            logger.error('Could not insert strategy, error was: ', err);
+        });
+});
+
+function getStrategies() {
+    return knex
+        .select(STRATEGY_COLUMNS)
+        .from('strategies')
+        .orderBy('created_at', 'desc')
+        .map(rowToStrategy);
+}
+
+function getStrategy(name) {
+    return knex
+        .first(STRATEGY_COLUMNS)
+        .from('strategies')
+        .where({name: name})
+        .then(rowToStrategy);
+}
+
+function rowToStrategy(row) {
+    if (!row) {
+        throw new Error('invalid row');
+    }
+
+    return {
+        name: row.name,
+        description: row.description,
+        enabled: row.enabled > 0,
+        parametersTemplate: row.parameters_template // jshint ignore: line
+    };
+}
+
+function eventToRow(event) {
+    return {
+        name: event.data.name,
+        description: event.data.description,
+        parameters_template: event.data.parametersTemplate // jshint ignore: line
+    };
+}
+
+module.exports = {
+    getStrategies: getStrategies,
+    getStrategy: getStrategy
+};
+