From a644e95044c08b9aac6b57236d23913430b9a6b2 Mon Sep 17 00:00:00 2001
From: hacki <akn@etrange.org>
Date: Thu, 5 Oct 2023 23:18:02 +0200
Subject: [PATCH] :goal_net: handled unhandled errors + moved default config
 from code to .env file

---
 .env      |  7 +++++++
 config.go | 42 +++++++++++++++++++++++-------------------
 go.mod    |  6 +++++-
 main.go   | 11 +++++++++--
 4 files changed, 44 insertions(+), 22 deletions(-)

diff --git a/.env b/.env
index e69de29..0e99fe4 100644
--- a/.env
+++ b/.env
@@ -0,0 +1,7 @@
+PLAKKEN_INTERFACE=0.0.0.0
+PLAKKEN_PORT=3000
+PLAKKEN_REDIS_ADDR=localhost:6379
+PLAKKEN_REDIS_USER=
+PLAKKEN_REDIS_PASSWORD=
+PLAKKEN_REDIS_DB=0
+PLAKKEN_REDIS_URL_LEN=5
diff --git a/config.go b/config.go
index 3126aeb..d9c0ab4 100644
--- a/config.go
+++ b/config.go
@@ -1,6 +1,8 @@
 package main
 
 import (
+	"github.com/joho/godotenv"
+	"log"
 	"os"
 	"strconv"
 )
@@ -15,38 +17,40 @@ type config struct {
 	urlLength     int
 }
 
-func setConfig() config {
-	host := os.Getenv("PLAKKEN_HOST")
+func getConfig() config {
+	err := godotenv.Load()
+	if err != nil {
+		log.Fatalf("Error loading .env file: %v", err)
+	}
 
 	port := os.Getenv("PLAKKEN_PORT")
-	if port == "" {
-		port = "3000"
-	}
 	redisAddr := os.Getenv("PLAKKEN_REDIS_ADDR")
-	if redisAddr == "" {
-		redisAddr = "localhost:6379"
+	db := os.Getenv("PLAKKEN_REDIS_DB")
+	uLen := os.Getenv("PLAKKEN_REDIS_URL_LEN")
+
+	if port == "" || redisAddr == "" {
+		log.Fatal("Missing or invalid PLAKKEN_PORT or PLAKKEN_REDIS_ADDR")
 	}
 
-	redisUser := os.Getenv("PLAKKEN_REDIS_USER")
-	redisPassword := os.Getenv("PLAKKEN_REDIS_PASSWORD")
-	redisDB, err := strconv.Atoi(os.Getenv("PLAKKEN_REDIS_DB"))
+	redisDB, err := strconv.Atoi(db)
 	if err != nil {
-		redisDB = 0
+		log.Fatal("Invalid PLAKKEN_REDIS_DB")
 	}
 
-	urlLength, err := strconv.Atoi("PLAKKEN_URL_LENGTH")
+	urlLen, err := strconv.Atoi(uLen)
 	if err != nil {
-		urlLength = 3
+		log.Fatal("Invalid PLAKKEN_REDIS_URL_LEN")
 	}
-	s := config{
-		host:          host,
+
+	conf := config{
+		host:          os.Getenv("PLAKKEN_INTERFACE"),
 		port:          port,
 		redisAddr:     redisAddr,
-		redisUser:     redisUser,
-		redisPassword: redisPassword,
+		redisUser:     os.Getenv("PLAKKEN_REDIS_USER"),
+		redisPassword: os.Getenv("PLAKKEN_REDIS_PASSWORD"),
 		redisDB:       redisDB,
-		urlLength:     urlLength,
+		urlLength:     urlLen,
 	}
 
-	return s
+	return conf
 }
diff --git a/go.mod b/go.mod
index 4996e79..8331b11 100644
--- a/go.mod
+++ b/go.mod
@@ -2,8 +2,12 @@ module plakken
 
 go 1.21
 
+require (
+	github.com/joho/godotenv v1.5.1
+	github.com/redis/go-redis/v9 v9.2.1
+)
+
 require (
 	github.com/cespare/xxhash/v2 v2.2.0 // indirect
 	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
-	github.com/redis/go-redis/v9 v9.2.1 // indirect
 )
diff --git a/main.go b/main.go
index d169ef9..f3370c7 100644
--- a/main.go
+++ b/main.go
@@ -3,6 +3,7 @@ package main
 import (
 	"fmt"
 	"io"
+	"log"
 	"net/http"
 	"strings"
 )
@@ -42,12 +43,18 @@ func handleRequest(w http.ResponseWriter, r *http.Request) {
 }
 
 func main() {
-	currentConfig = setConfig()
+	currentConfig = getConfig()
 	listen := currentConfig.host + ":" + currentConfig.port
 	http.HandleFunc("/", handleRequest)
 
+	if currentConfig.host == "" {
+		fmt.Println("Listening on port " + listen)
+	} else {
+		fmt.Println("Listening on " + listen)
+	}
+
 	err := http.ListenAndServe(listen, nil)
 	if err != nil {
-		fmt.Println(err)
+		log.Fatal(err)
 	}
 }