Backend can now generate config.js, the very basic stuff, more work needed

pkg/api/api_config.go

@@ -0,0 +1,68 @@
+package api
+
+import (
+	"encoding/json"
+	"strings"
+
+	"github.com/torkelo/grafana-pro/pkg/bus"
+	"github.com/torkelo/grafana-pro/pkg/middleware"
+	m "github.com/torkelo/grafana-pro/pkg/models"
+)
+
+const configTemplate = `
+	define(['settings'],
+	function (Settings) {
+		"use strict";
+		return new Settings(%json%);
+	});
+	`
+
+type configJsTmplModel struct {
+	DataSources []*m.DataSource
+}
+
+func renderConfig(data *configJsTmplModel) string {
+	datasources := make(map[string]interface{})
+
+	for _, ds := range data.DataSources {
+		datasources[ds.Name] = map[string]interface{}{
+			"type": ds.Type,
+			"url":  ds.Url,
+		}
+	}
+
+	jsonObj := map[string]interface{}{
+		"datasources": datasources,
+	}
+
+	buff, _ := json.Marshal(jsonObj)
+
+	return strings.Replace(configTemplate, "%json%", string(buff), 1)
+}
+
+func GetConfigJS(c *middleware.Context) {
+
+	query := m.GetDataSourcesQuery{AccountId: c.GetAccountId()}
+	err := bus.Dispatch(&query)
+
+	if err != nil {
+		c.Handle(500, "cold not load data sources", err)
+		return
+	}
+
+	vm := configJsTmplModel{DataSources: query.Result}
+	configStr := renderConfig(&vm)
+
+	if err != nil {
+		c.Handle(500, "Failed to generate config.js", err)
+		return
+	}
+
+	c.Header().Set("Content-Type", "text/javascript; charset=UTF-8")
+	c.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
+	c.Header().Set("Pragma", "no-cache")
+	c.Header().Set("Expires", "0")
+	c.WriteHeader(200)
+
+	c.Write([]byte(configStr))
+}