implemented answer checking, modulo scores

handlers.go

@@ -6,19 +6,26 @@ import (
 	"log"
 	"math/rand"
 	"net/http"
+	"strconv"
 )
 
 type prob struct {
 	Operation string
 	First     int
-	Second      int
+	Second    int
+	Score     int
+}
+
+type solution struct {
+	Status bool
+	Score  int
 }
 
 type JsonHandler func(http.ResponseWriter, *http.Request)
 
 func (h JsonHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
 	w.Header().Set("Content-Type", "application/json")
-    h(w, req)
+	h(w, req)
 }
 
 func problem(w http.ResponseWriter, req *http.Request) {
@@ -39,17 +46,53 @@ func problem(w http.ResponseWriter, req *http.Request) {
 		second = rand.Intn(MAX)
 	}
 
-	r := prob{operation, first, second}
+	r := prob{operation, first, second, 66}
 
 	b, err := json.Marshal(r)
 	if err != nil {
-		log.Fatal("issue with json marshalling")
+		log.Fatal("issue with json marshalling", err)
 	}
 	j := string(b)
-	fmt.Println(j)
+	fmt.Println("problem", j)
 	fmt.Fprintf(w, j)
 }
 
 func attempt(w http.ResponseWriter, req *http.Request) {
-	fmt.Fprintf(w, "hello world")
+	first, err := strconv.Atoi(req.FormValue("first"))
+	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 == "" {
+		guess = 0
+	} else {
+		guess, err = strconv.Atoi(answer)
+		if err != nil {
+			log.Fatal("cannot parser answer", err)
+		}
+	}
+	if err != nil {
+		log.Fatal("cannot parse answer", err)
+	}
+
+	var result bool
+	if operation == "+" {
+		result = first+second == guess
+	} else if operation == "-" {
+		result = first-second == guess
+	}
+
+	b, err := json.Marshal(solution{result, 66})
+	if err != nil {
+		log.Fatal("cannot marshal solution", err)
+	}
+	j := string(b)
+	fmt.Println("attempt", j)
+	fmt.Fprintf(w, j)
 }

static/math.js

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