implemented scores

handlers.go

@@ -3,6 +3,7 @@ package main
 import (
 	"encoding/json"
 	"fmt"
+	"github.com/gorilla/sessions"
 	"log"
 	"math/rand"
 	"net/http"
@@ -28,6 +29,20 @@ func (h JsonHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
 	h(w, req)
 }
 
+func getScore(session *sessions.Session) int {
+	score := session.Values["Score"]
+	var parsed_score int
+	if score == nil {
+		parsed_score = 0
+	} else {
+		parsed_score = score.(int)
+	}
+	return parsed_score
+}
+
+func setScore(session *sessions.Session) {
+}
+
 func problem(w http.ResponseWriter, req *http.Request) {
 	operation := "+"
 	if r := rand.Intn(2); r == 0 {
@@ -46,7 +61,10 @@ func problem(w http.ResponseWriter, req *http.Request) {
 		second = rand.Intn(MAX)
 	}
 
-	r := prob{operation, first, second, 66}
+	session, _ := store.Get(req, "Score")
+	score := getScore(session)
+
+	r := prob{operation, first, second, score}
 
 	b, err := json.Marshal(r)
 	if err != nil {
@@ -62,11 +80,14 @@ func attempt(w http.ResponseWriter, req *http.Request) {
 	if err != nil {
 		log.Fatal("cannot parse first", err)
 	}
+
 	operation := req.FormValue("operation")
+
 	second, err := strconv.Atoi(req.FormValue("second"))
 	if err != nil {
 		log.Fatal("cannot parse second", err)
 	}
+
 	var guess int
 	answer := req.FormValue("answer")
 	if answer == "" {
@@ -77,9 +98,6 @@ func attempt(w http.ResponseWriter, req *http.Request) {
 			log.Fatal("cannot parser answer", err)
 		}
 	}
-	if err != nil {
-		log.Fatal("cannot parse answer", err)
-	}
 
 	var result bool
 	if operation == "+" {
@@ -88,7 +106,19 @@ func attempt(w http.ResponseWriter, req *http.Request) {
 		result = first-second == guess
 	}
 
-	b, err := json.Marshal(solution{result, 66})
+	session, _ := store.Get(req, "Score")
+	score := getScore(session)
+    if result {
+        score += 1
+    } else {
+        score -= 1
+    }
+
+    session, _ = store.Get(req, "Score")
+    session.Values["Score"] = score
+    session.Save(req, w)
+
+	b, err := json.Marshal(solution{result, score})
 	if err != nil {
 		log.Fatal("cannot marshal solution", err)
 	}

static/math.js

@@ -20,6 +20,7 @@ function deal_with_answer(e) {
         "answer": $("#answer").val(),
     };
     $.post("/api/v0/attempt/", data, function(d) {
+        $("#score").text(d["Score"]);
         if(d["Status"]) {
             $("body").removeClass("wrong");
             new_problem();