package main import ( "encoding/json" "log" "math/rand" "net/http" "strconv" "github.com/gorilla/sessions" ) type prob struct { Operation string First int Second int Score int } type solution struct { Status bool Score int } 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 addsub(w http.ResponseWriter, req *http.Request) { w.Header().Set("Content-Type", "application/json") operation := "+" if r := rand.Intn(2); r == 0 { operation = "-" } first := rand.Intn(MAX) var second int if operation == "-" { if first == 0 { second = 0 } else { second = rand.Intn(first) } } else { second = rand.Intn(MAX) } session, _ := store.Get(req, "Score") score := getScore(session) r := prob{operation, first, second, score} err := json.NewEncoder(w).Encode(r) if err != nil { log.Fatal("issue with json marshalling", err) } } func mul(w http.ResponseWriter, req *http.Request) { w.Header().Set("Content-Type", "application/json") session, _ := store.Get(req, "Score") score := getScore(session) err := json.NewEncoder(w).Encode( prob{ "x", rand.Intn(11), rand.Intn(11), score, }, ) if err != nil { log.Fatal("issue with json marshalling", err) } } func attempt(w http.ResponseWriter, req *http.Request) { w.Header().Set("Content-Type", "application/json") 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) } } var result bool switch operation { case "+": result = first+second == guess case "-": result = first-second == guess case "*", "x": result = first*second == guess } session, _ := store.Get(req, "Score") score := getScore(session) if result { score += 1 } else { score -= 1 } session.Values["Score"] = score session.Save(req, w) err = json.NewEncoder(w).Encode( solution{ result, score, }, ) if err != nil { log.Fatal("cannot marshal solution", err) } }