crowsnest/golang/cmd/frontend/main.go

package main

import (
	"crowsnest/internal/model/database"
	"database/sql"
	"fmt"
	"log"
	"net/http"
	"os"

	_ "github.com/lib/pq"
)

type App struct {
	articles *database.ArticleModel
}

func main() {
	// collect environement variables
	dbPass := os.Getenv("DB_PASS")
	if dbPass == "" {
		log.Fatal("empty DB_PASS")
	}
	dbHost := os.Getenv("DB_HOST")
	if dbHost == "" {
		log.Fatal("empty DB_HOST")
	}
	dbPort := os.Getenv("DB_PORT")
	if dbPort == "" {
		dbPort = "5432"
	}
	dbUser := os.Getenv("DB_USER")
	if dbUser == "" {
		dbUser = "postgres"
	}
	dbName := os.Getenv("DB_NAME")

	// connect to database
	databaseURL := fmt.Sprintf("user=%s password=%s dbname=%s host=%s port=%s sslmode=disable",
		dbUser, dbPass, dbName, dbHost, dbPort)
	db, err := sql.Open("postgres", databaseURL)
	if err != nil {
		log.Fatal(err)
	}
	defer db.Close()
	if err = db.Ping(); err != nil {
		log.Fatal(err)
	}

	// define app
	app := &App{
		articles: &database.ArticleModel{DB: db},
	}

	// start web server
	server := http.Server{
		Addr:    ":8080",
		Handler: app.routes(),
	}

	log.Println("server started, listening on :8080")
	server.ListenAndServe()
}