From 0ea056a2acc8a441d60590ad91d9fff9ba9719f6 Mon Sep 17 00:00:00 2001
From: Meutel <meutel@meutel.net>
Date: Tue, 1 Aug 2017 15:37:58 +0200
Subject: [PATCH] Config file

---
 .gitignore |  1 +
 main.go    | 50 ++++++++++++++++++++++++++++++++++++++++++++------
 2 files changed, 45 insertions(+), 6 deletions(-)

diff --git a/.gitignore b/.gitignore
index 4a3d7e4..3800f46 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@
 *~ 
 go-bouquins
 calibre.db
+bouquins.json
diff --git a/main.go b/main.go
index c9d28c3..0fd43e2 100644
--- a/main.go
+++ b/main.go
@@ -2,20 +2,27 @@ package main
 
 import (
 	"database/sql"
+	"encoding/json"
 	"html/template"
 	"log"
 	"net/http"
+	"os"
 
 	_ "github.com/mattn/go-sqlite3"
 
 	"meutel.net/meutel/go-bouquins/bouquins"
 )
 
+type BouquinsConf struct {
+	BindAddress string `json:"bind-address"`
+	DbPath      string `json:"db-path"`
+}
+
 const (
 	INDEX   = "/"
-	BOOKS   = "/books"
-	AUTHORS = "/authors"
-	SERIES  = "/series"
+	BOOKS   = "/books/"
+	AUTHORS = "/authors/"
+	SERIES  = "/series/"
 	JS      = "/js/"
 	CSS     = "/css/"
 	FONTS   = "/fonts/"
@@ -23,13 +30,42 @@ const (
 
 var db *sql.DB
 
-func init() {
+// load config
+func ReadConfig() (*BouquinsConf, error) {
+	conf := new(BouquinsConf)
+	confPath := "bouquins.json"
+	if len(os.Args) > 1 {
+		confPath = os.Args[1]
+	}
+	confFile, err := os.Open(confPath)
+	if err == nil {
+		defer confFile.Close()
+		err = json.NewDecoder(confFile).Decode(conf)
+	} else {
+		log.Println("no conf file, using defaults")
+		err = nil
+	}
+	// default values
+	if conf.DbPath == "" {
+		conf.DbPath = "calibre.db"
+	}
+	if conf.BindAddress == "" {
+		conf.BindAddress = ":9000"
+	}
+	return conf, err
+}
+
+func initApp() *BouquinsConf {
 	log.SetFlags(log.LstdFlags | log.Lshortfile)
+	conf, err := ReadConfig()
+	if err != nil {
+		log.Fatalln(err)
+	}
 	tpl, err := template.ParseGlob("templates/*.html")
 	if err != nil {
 		log.Fatalln(err)
 	}
-	db, err = sql.Open("sqlite3", "calibre.db")
+	db, err = sql.Open("sqlite3", conf.DbPath)
 	if err != nil {
 		log.Fatalln(err)
 	}
@@ -39,6 +75,7 @@ func init() {
 	}
 	assets()
 	router(app)
+	return conf
 }
 
 func assets() {
@@ -55,6 +92,7 @@ func router(app *bouquins.Bouquins) {
 }
 
 func main() {
+	conf := initApp()
 	defer db.Close()
-	http.ListenAndServe(":9000", nil)
+	http.ListenAndServe(conf.BindAddress, nil)
 }