package main

import (
    "fmt"
    "log"
    "net/http"
    "os"

    "github.com/zenazn/goji"
    "github.com/zenazn/goji/web"
)

type Controller struct {
    session *Session
}

func NewController() (*Controller, error) {
    if uri := os.Getenv("MONGOHQ_URL"); uri == "" {
        return nil, fmt.Errorf("no DB connection string provided")
    }
    session, err := mgo.Dial(uri)
    if err != nil {
        return nil, err
    }
    return &Controller{
        session: session,
    }, nil
}

func (c *Controller) getUser(c web.C, w http.ResponseWriter, r *http.Request) {
    // Use the session var here
}

func main() {
    ctl, err := NewController()
    if err != nil {
        log.Fatal(err)
    }
    defer ctl.session.Close()

    goji.Get("/user", ctl.getUser)
    goji.Serve()
}