little formatting & flag mode at startup

config/config.go

@@ -13,7 +13,7 @@ import (
 	"log"
 )
 
-//Stores the main configuration for the application
+//Configuration Stores the main configuration for the application
 type Configuration struct {
 	ServerPort string
 }
@@ -23,15 +23,17 @@ var config Configuration
 
 //ReadConfig will read the configuration json file to read the parameters
 //which will be passed in the config file
-func ReadConfig(fileName string) Configuration {
+func ReadConfig(fileName string) (Configuration, error) {
 	configFile, err := ioutil.ReadFile(fileName)
 	if err != nil {
-		log.Fatalf("Unable to read config file '%s'", fileName)
+		log.Print("Unable to read config file, switching to flag mode")
+		return Configuration{}, err
 	}
 	//log.Print(configFile)
 	err = json.Unmarshal(configFile, &config)
 	if err != nil {
-		log.Print(err)
+		log.Print("Invalid JSON, expecting port from command line flag")
+		return Configuration{}, err
 	}
-	return config
+	return config, nil
 }

main.go

@@ -5,39 +5,71 @@ package main
  * License: MIT
  **/
 import (
+	"flag"
 	"log"
 	"net/http"
+	"strings"
 
 	"github.com/thewhitetulip/Tasks/config"
 	"github.com/thewhitetulip/Tasks/views"
 )
 
 func main() {
-	values := config.ReadConfig("config.json")
+	values, err := config.ReadConfig("config.json")
+	var port *string
+
+	if err != nil {
+		port = flag.String("port", "", "IP address")
+		flag.Parse()
+
+		//User is expected to give :8080 like input, if they give 8080
+		//we'll append the required ':'
+		if !strings.HasPrefix(*port, ":") {
+			*port = ":" + *port
+			log.Println("port is " + *port)
+		}
+
+		values.ServerPort = *port
+	}
+
 	views.PopulateTemplates()
-	http.HandleFunc("/", views.RequiresLogin(views.ShowAllTasksFunc))
+
+	//Login logout
 	http.HandleFunc("/login/", views.LoginFunc)
 	http.HandleFunc("/logout/", views.RequiresLogin(views.LogoutFunc))
+
 	http.HandleFunc("/add-category/", views.RequiresLogin(views.AddCategoryFunc))
 	http.HandleFunc("/add-comment/", views.RequiresLogin(views.AddCommentFunc))
+	http.HandleFunc("/add/", views.RequiresLogin(views.AddTaskFunc))
+
+	//these handlers are used to delete
 	http.HandleFunc("/del-comment/", views.RequiresLogin(views.DeleteCommentFunc))
 	http.HandleFunc("/del-category/", views.RequiresLogin(views.DeleteCategoryFunc))
-	http.HandleFunc("/upd-category/", views.RequiresLogin(views.UpdateCategoryFunc))
-	http.HandleFunc("/category/", views.RequiresLogin(views.ShowCategoryFunc))
-	http.HandleFunc("/complete/", views.RequiresLogin(views.CompleteTaskFunc))
 	http.HandleFunc("/delete/", views.RequiresLogin(views.DeleteTaskFunc))
-	http.HandleFunc("/files/", views.RequiresLogin(views.UploadedFileHandler))
+
+	//these handlers update
+	http.HandleFunc("/upd-category/", views.RequiresLogin(views.UpdateCategoryFunc))
+	http.HandleFunc("/update/", views.RequiresLogin(views.UpdateTaskFunc))
+
+	//these handlers are used for restoring tasks
+	http.HandleFunc("/incomplete/", views.RequiresLogin(views.RestoreFromCompleteFunc))
+	http.HandleFunc("/restore/", views.RequiresLogin(views.RestoreTaskFunc))
+
+	//these handlers fetch set of tasks
+	http.HandleFunc("/", views.RequiresLogin(views.ShowAllTasksFunc))
+	http.HandleFunc("/category/", views.RequiresLogin(views.ShowCategoryFunc))
 	http.HandleFunc("/deleted/", views.RequiresLogin(views.ShowTrashTaskFunc))
+	http.HandleFunc("/completed/", views.RequiresLogin(views.ShowCompleteTasksFunc))
+
+	//these handlers perform action like delete, mark as complete etc
+	http.HandleFunc("/complete/", views.RequiresLogin(views.CompleteTaskFunc))
+	http.HandleFunc("/files/", views.RequiresLogin(views.UploadedFileHandler))
 	http.HandleFunc("/trash/", views.RequiresLogin(views.TrashTaskFunc))
 	http.HandleFunc("/edit/", views.RequiresLogin(views.EditTaskFunc))
-	http.HandleFunc("/completed/", views.RequiresLogin(views.ShowCompleteTasksFunc))
-	http.HandleFunc("/restore/", views.RequiresLogin(views.RestoreTaskFunc))
-	http.HandleFunc("/incomplete/", views.RequiresLogin(views.RestoreFromCompleteFunc))
-	http.HandleFunc("/add/", views.RequiresLogin(views.AddTaskFunc))
-	http.HandleFunc("/update/", views.RequiresLogin(views.UpdateTaskFunc))
 	http.HandleFunc("/search/", views.RequiresLogin(views.SearchTaskFunc))
-	//http.HandleFunc("/static/", ServeStaticFunc)
+
 	http.Handle("/static/", http.FileServer(http.Dir("public")))
+
 	log.Println("running server on ", values.ServerPort)
 	log.Fatal(http.ListenAndServe(values.ServerPort, nil))
 }