some golfing, start on registration

server/cmd/main.go

@@ -193,33 +193,54 @@ func setupAPI(opts Opts) {
 		})
 	}))
 
+	badMethod := func(w http.ResponseWriter) {
+		writeErrorResponse(w, 400, BBJResponse{
+			Error: true,
+			Data:  "bad method",
+		})
+	}
+
+	invalidArgs := func(w http.ResponseWriter) {
+		writeErrorResponse(w, 400, BBJResponse{
+			Error: true,
+			Data:  "invalid args",
+		})
+	}
+
+	type AuthArgs struct {
+		Username string `json:"target_user"`
+		AuthHash string `json:"target_hash"`
+	}
+
+	http.HandleFunc("/user_register", handler(opts, func(w http.ResponseWriter, req *http.Request) {
+		if req.Method != "POST" {
+			badMethod(w)
+			return
+		}
+
+		var args AuthArgs
+		if err := json.NewDecoder(req.Body).Decode(&args); err != nil {
+			invalidArgs(w)
+			return
+		}
+
+		// TODO check if user exists
+		// TODO compare hash
+	}))
+
 	http.HandleFunc("/check_auth", handler(opts, func(w http.ResponseWriter, req *http.Request) {
 		if req.Method != "POST" {
-			writeErrorResponse(w, 400, BBJResponse{
-				Error: true,
-				Data:  "bad method",
-			})
+			badMethod(w)
 			return
 		}
 
-		type args struct {
-			TargetUser string `json:"target_user"`
-			TargetHash string `json:"target_hash"`
-		}
-
-		var a args
-
-		err := json.NewDecoder(req.Body).Decode(&a)
-
-		if err != nil {
-			writeErrorResponse(w, 400, BBJResponse{
-				Error: true,
-				Data:  "invalid arguments",
-			})
+		var args AuthArgs
+		if err := json.NewDecoder(req.Body).Decode(&args); err != nil {
+			invalidArgs(w)
 			return
 		}
 
-		opts.Logf("got %s %s", a.TargetUser, a.TargetHash)
+		opts.Logf("got %s %s", args.Username, args.AuthHash)
 
 		db := opts.DB
 
@@ -240,7 +261,7 @@ func setupAPI(opts Opts) {
 		defer stmt.Close()
 
 		var authHash string
-		err = stmt.QueryRow(a.TargetUser).Scan(&authHash)
+		err = stmt.QueryRow(args.Username).Scan(&authHash)
 		if err != nil {
 			if strings.Contains(err.Error(), "no rows in result") {
 				opts.Logf("user not found")
@@ -260,7 +281,7 @@ func setupAPI(opts Opts) {
 
 		// TODO unique constraint on user_name
 
-		if authHash != a.TargetHash {
+		if authHash != args.AuthHash {
 			http.Error(w, "incorrect password", 403)
 			writeErrorResponse(w, 403, BBJResponse{
 				Error: true,