add saving shortcuts to local db file

.gitignore

@@ -1,3 +1,4 @@
 .bin
 .vscode
 riffraff
+data.json

internal/config.go

@@ -1,58 +0,0 @@
-package internal
-
-import (
-	"os"
-	"encoding/json"
-)
-
-type Config struct {
-	ListenAddress string `json:"listenAddress"`
-	DataPath string `json:"dataPath"`
-	Shortcuts Shortcuts `json:"shortcuts"`
-}
-
-func LoadConfig(configPath string) (Config, error) {
-	var configuration Config
-	file, err := os.Open(configPath)
-	if err != nil {
-		return configuration, err
-	}
-
-	defer file.Close()
-
-	decoder := json.NewDecoder(file)
-
-	if err := decoder.Decode(&configuration); err != nil {
-		return configuration, err
-	}
-
-	if configuration.Shortcuts == nil {
-		configuration.Shortcuts = make(map[string]string)
-	}
-
-
-	if _, ok := configuration.Shortcuts["*"]; !ok {
-		configuration.Shortcuts["*"] = DefaultSearchProvider
-	}
-
-	configuration.Shortcuts["help"] = "/"
-
-	if configuration.ListenAddress == "" {
-		configuration.ListenAddress = "127.0.0.1"
-	}
-
-	if configuration.DataPath == "" {
-		configuration.DataPath = "."
-	}
-
-	return configuration, nil
-}
-
-func SaveShortcuts(path string, shorts Shortcuts) error {
-	return nil
-
-}
-
-func LoadShortcuts(path string) (Shortcuts, error) {
-	return nil, nil
-}

internal/http.go

@@ -10,9 +10,10 @@ import (
 
 type Shortcuts map[string]string
 
-func NewServer(tp TemplateRenderer, shorts Shortcuts, accessLogging bool) http.Handler {
+func NewServer(tp TemplateRenderer, shortcutStore *ShortcutStore, accessLogging bool) http.Handler {
 	mux := http.NewServeMux()
 
+	shorts, _ := shortcutStore.LoadShortcuts()
 	ss := &CommandHandler{
 		Mutex: &sync.Mutex{},
 		Shortcuts: shorts,
@@ -24,14 +25,14 @@ func NewServer(tp TemplateRenderer, shorts Shortcuts, accessLogging bool) http.H
 		"Content-Type": []string{"application/opensearchdescription+xml"},
 	}))
 
-	handlerFunc := searchHandler(ss, accessLogging)
+	handlerFunc := searchHandler(ss, shortcutStore, accessLogging)
 	mux.HandleFunc("/search", handlerFunc)
 	mux.HandleFunc("/search_to_home", handlerFunc)
 
 	return mux
 }
 
-func searchHandler(scs *CommandHandler, logAccess bool) http.HandlerFunc {
+func searchHandler(scs *CommandHandler, shortcutStore *ShortcutStore, logAccess bool) http.HandlerFunc {
 	accessLogger := log.New(os.Stdout, "[access] ", log.Ldate|log.Lmicroseconds|log.Lshortfile)
 
 	return func(res http.ResponseWriter, req *http.Request) {
@@ -45,6 +46,15 @@ func searchHandler(scs *CommandHandler, logAccess bool) http.HandlerFunc {
 		}
 
 		accessLogger.Printf("'%s' %s -> 302 %s", commandString, action.Action, action.Location)
+
+		if action.Action != "lookup" {
+			if err := shortcutStore.SaveShortcuts(scs.Shortcuts); err != nil {
+				accessLogger.Printf("'%s' %s -> could not save shortcuts database file: %v", commandString, action.Action, err)
+				http.Error(res, err.Error(), http.StatusInternalServerError)
+				return
+			}
+		}
+
 		http.Redirect(res, req, action.Location, http.StatusFound)
 	}
 }

internal/shortcuts.go

@@ -105,6 +105,13 @@ func (c *CommandHandler) getShortcut(key string, input ...string) Command {
 	}
 }
 
+func NewDefaultShortcuts() (Shortcuts) {
+	return Shortcuts{
+		"*": DefaultSearchProvider,
+		"help": "/",
+	}
+}
+
 type Command struct {
 	Action   string
 	Name     string

internal/storage.go

@@ -0,0 +1,103 @@
+package internal
+
+import (
+	"os"
+	"log"
+	"encoding/json"
+)
+
+type ShortcutStore struct {
+	Path string
+}
+
+type ShortcutData struct {
+	Shortcuts Shortcuts `json:"shortcuts"`
+}
+
+func (ss *ShortcutStore) Init() error {
+	defaultSS := NewDefaultShortcuts()
+	if _, err := os.Stat(ss.Path); os.IsNotExist(err) {
+		log.Printf("file doesn't exist %s: %v", ss.Path, err)
+		if err := ss.SaveShortcuts(defaultSS); err != nil {
+			return err
+		}
+		return nil
+	}
+
+
+	if _, err := ss.LoadShortcuts(); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (ss *ShortcutStore) SaveShortcuts(shorts Shortcuts) error {
+	// remove help shortcut
+
+	file, err := os.Create(ss.Path)
+	if err != nil {
+		return err
+	}
+
+	defer file.Close()
+
+	temp := Shortcuts{}
+
+	for k, v := range shorts {
+		if k != "help" {
+			temp[k] = v
+		}
+	}
+
+	sc := ShortcutData{ Shortcuts: temp }
+
+	encoder := json.NewEncoder(file)
+	encoder.SetIndent("", "\t")
+	if err := encoder.Encode(&sc); err != nil {
+		return  err
+	}
+
+	return nil
+
+}
+
+func (ss *ShortcutStore) LoadShortcuts() (Shortcuts, error) {
+	var sc ShortcutData
+	file, err := os.Open(ss.Path)
+	if err != nil {
+		if !os.IsExist(err) {
+			return NewDefaultShortcuts(), nil
+		}
+		return sc.Shortcuts, err
+	}
+
+	defer file.Close()
+	finfo, err := file.Stat()
+	if err != nil {
+		return sc.Shortcuts, err
+	}
+
+	if finfo.Size() == 0 {
+		return NewDefaultShortcuts(), nil
+	}
+
+
+	decoder := json.NewDecoder(file)
+
+	if err := decoder.Decode(&sc); err != nil {
+		return sc.Shortcuts, err
+	}
+
+	if sc.Shortcuts == nil {
+		return NewDefaultShortcuts(), nil
+	}
+
+	sc.Shortcuts["help"] = "/"
+
+	if v, ok := sc.Shortcuts["*"]; !ok || v == "" {
+		sc.Shortcuts["*"] = DefaultSearchProvider
+	}
+
+	return sc.Shortcuts, nil
+}

main.go

@@ -12,23 +12,25 @@ import (
 
 func main() {
 	port := flag.Int("port", 80, "port to listen on")
-	cfgPath := flag.String("config", "./config.json", "path to config file")
+	bindAddr := flag.String("bind", "0.0.0.0", "interface to bind to")
+	dbPath := flag.String("data", "./data.json", "path to save shortcut database")
 	enableAccessLogging := flag.Bool("accesslog", true, "Enable access logging")
 	flag.Parse()
 
 	box := packr.NewBox("./internal/templates")
 	tp := internal.TemplateRenderer{FS: box}
 
-	config, err := internal.LoadConfig(*cfgPath)
-	if err != nil  {
-		log.Fatalf("could not load config from file: %v", err)
+	ss := &internal.ShortcutStore{Path: *dbPath}
+	
+	if err := ss.Init(); err != nil {
+		log.Fatalf("could not access database file: %v", err)
 	}
 
-	server := internal.NewServer(tp, config.Shortcuts, *enableAccessLogging)
+	server := internal.NewServer(tp, ss, *enableAccessLogging)
 
 	log.SetPrefix("[INFO] ")
 
-	addr := fmt.Sprintf("%s:%d", config.ListenAddress, *port)
+	addr := fmt.Sprintf("%s:%d", *bindAddr, *port)
 	log.Printf("Listening @ %s", addr)
 	log.Fatal(http.ListenAndServe(addr, server))
 }

makefile

@@ -1,7 +1,7 @@
 APP := riffraff
 
 dev: clean .bin/$(APP)-dev
-	./.bin/$(APP)-dev -port 8080 -accesslog=true
+	./.bin/$(APP)-dev -port 8080 -accesslog=true -data=data.json
 
 test:
 	go test -v ./...
@@ -29,6 +29,21 @@ build: .bin/$(APP)
 clean:
 	rm -rf .bin
 
+clobber: clean
+	rm -rf data.json
+
+data.json:
+	cat <<EOF >> ./data.json
+	{
+		"shortcuts": {
+			"*": "https://duckduckgo.com/%s",
+			"fb": "https://facebook.com",
+			"gh": "https://github.com",
+			"gitemoji": "https://www.webfx.com/tools/emoji-cheat-sheet/"
+		}
+	}
+	EOF
+
 packr:
 	go get -u github.com/gobuffalo/packr/packr