Add rank in contest show view

orm/contest.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"log"
 	"math/rand"
+	"sort"
 	"strconv"
 	"strings"
 
@@ -38,6 +39,7 @@ type Contest struct {
 	Responses        []*Response
 	StartedResponses []*Response
 	SavedResponses   []*Response
+	Rank             []*Response
 
 	prevStartTime time.Time
 }
@@ -99,11 +101,24 @@ func (c *Contest) Read(db *Database, args map[string]string, w http.ResponseWrit
 		Preload("SavedResponses", func(tx *gorm.DB) *gorm.DB {
 			return db.DB().Where("end_time <> ?", time.Time{})
 		}).
+		Preload("Rank", func(tx *gorm.DB) *gorm.DB {
+			return db.DB().Order("end_time ASC")
+		}).
 		Preload("Questions").
 		First(&contest, id).Error; err != nil {
 		return nil, err
 	}
 
+	for _, r := range contest.Rank {
+		if err := calcScore(db, r); err != nil {
+			return nil, err
+		}
+	}
+
+	sort.SliceStable(contest.Rank, func(i, j int) bool {
+		return contest.Rank[i].Score < contest.Rank[j].Score
+	})
+
 	return &contest, nil
 }
 

orm/response.go

@@ -38,7 +38,8 @@ type Response struct {
 	EndTime   time.Time
 	TimeLeft  time.Duration
 
-	Score int `gorm:"-"`
+	Score       int    `gorm:"-"`
+	ScoreString string `gorm:"-"`
 
 	Questions       []*Question
 	SingleResponses []*SingleResponse `gorm:"-"`
@@ -103,6 +104,37 @@ func (model *Response) BeforeSave(tx *gorm.DB) error {
 	return nil
 }
 
+func calcScore(db *Database, response *Response) error {
+	response.Score = 0
+	if response.AnswersIDs != "" {
+		srIDs := strings.Split(response.AnswersIDs, " ")
+		for _, srID := range srIDs {
+			id, err := strconv.Atoi(srID)
+			if err != nil {
+				return err
+			}
+			response.SingleResponses = append(response.SingleResponses, &SingleResponse{uint(id)})
+		}
+
+		for _, sr := range response.SingleResponses {
+			var answer Answer
+
+			if err := db._db.First(&answer, sr.AnswerID).Error; err != nil {
+				return err
+			}
+
+			if answer.Correct {
+				response.Score++
+			}
+		}
+
+	}
+
+	response.ScoreString = fmt.Sprintf("%s punti %v", strconv.Itoa(response.Score), response.EndTime.Sub(response.StartTime))
+
+	return nil
+}
+
 func (model *Response) Create(db *Database, args map[string]string, w http.ResponseWriter, r *http.Request) (interface{}, error) {
 	if r.Method == "GET" {
 		response := new(Response)
@@ -151,6 +183,7 @@ func (model *Response) Read(db *Database, args map[string]string, w http.Respons
 	}
 
 	if response.AnswersIDs != "" {
+		response.Score = 0
 		srIDs := strings.Split(response.AnswersIDs, " ")
 		for _, srID := range srIDs {
 			id, err := strconv.Atoi(srID)

templates/contests_show.html.tpl

@@ -66,6 +66,20 @@
     </div>
   </div>
 
+  <div class="row">
+    <div class="col-md-12">
+      
+      {{$options := `
+      title: "Classifica"
+      model: "Response"
+      icon: "fa fa-hourglass"
+      `}}
+      
+      {{$noElements := "Nessun partecipante ha ancora consegnato la prova."}}
+      {{template "relation_list" dict "options" ($options|yaml) "data" .Data.Rank "noElements" $noElements "small" (toSlice "ScoreString")}} 
+    </div>
+  </div>
+
 </div>    
 
 {{ end }}