isl-api/main.go

package main

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

	"forgejo.merr.is/annika/isl-api/Controllers"
	routes "forgejo.merr.is/annika/isl-api/Routes"
	"forgejo.merr.is/annika/isl-api/Services"
	"forgejo.merr.is/annika/isl-api/sql/powerItem"
	"github.com/go-chi/chi/v5"
	"github.com/go-chi/cors"
	"github.com/jackc/pgx/v4/pgxpool"
	"github.com/spf13/viper"
)

var conf *EnvConfigs

func init() {
	setupConfig()
}

func main() {
	deps := dependencies{}
	deps.initializeDependencies()

	fmt.Printf("Preparing to listen on `:%v`\n", conf.HttpPort)
	err := http.ListenAndServe(fmt.Sprintf(":%v", conf.HttpPort), deps.router)
	log.Fatal(err)
}

func setupConfig() {
	viper.AddConfigPath(".")
	viper.SetConfigName(".env")
	viper.SetConfigType("env")

	viper.SetEnvPrefix("isl_api")
	viper.AutomaticEnv()

	if err := viper.ReadInConfig(); err != nil {
		fmt.Printf("Error reading env file: %v\n", err)
	}

	if err := viper.Unmarshal(&conf); err != nil {
		log.Fatal(err)
	}
}

type dependencies struct {
	router              *chi.Mux
	postgresConnection  *pgxpool.Pool
	context             context.Context
	powerItemQuerier    *powerItem.DBQuerier
	powerItemService    *Services.PowerItemService
	powerItemController *Controllers.PowerItemController
}

func (d *dependencies) initializeDependencies() error {
	var err error

	d.router = chi.NewRouter()
	d.router.Use(cors.Handler(cors.Options{
		AllowedOrigins: []string{"*"},
		AllowedMethods: []string{"GET", "POST", "PUT", "DELETE", "OPTIONS"},
		AllowedHeaders: []string{"Cache-Control", "Expires", "Pragma"},
	}))
	d.context = context.Background()
	d.postgresConnection, err = pgxpool.Connect(d.context, conf.ConnectionString)
	if err != nil {
		return err
	}
	d.powerItemQuerier = powerItem.NewQuerier(d.postgresConnection)
	d.powerItemService = Services.NewPowerItemService(d.powerItemQuerier)
	d.powerItemController = Controllers.NewPowerItemController(d.powerItemService)
	d.router.Mount("/powerItems", routes.SetupPowerItemRoutes(*d.powerItemController))
	return nil
}