Gradation: add route to add missing users

works.go

@@ -179,6 +179,49 @@ func declareAPIAdminWorksRoutes(router *gin.RouterGroup) {
 
 		c.JSON(http.StatusOK, grades)
 	})
+	worksRoutes.PATCH("/grades", func(c *gin.Context) {
+		w := c.MustGet("work").(*Work)
+
+		// Fetch existing grades
+		grades, err := w.GetGrades("")
+		if err != nil {
+			log.Printf("Unable to GetGrades(wid=%d): %s", w.Id, err.Error())
+			c.AbortWithStatusJSON(http.StatusInternalServerError, gin.H{"errmsg": "An error occurs during grades retrieval."})
+			return
+		}
+
+		// Create an index
+		known_users := map[int64]bool{}
+		for _, g := range grades {
+			known_users[g.IdUser] = true
+		}
+
+		// Fetch students list registered for this course
+		users, err := getFilteredUsers(w.Promo, w.Group)
+		if err != nil {
+			log.Printf("Unable to getFilteredUsers(%d, %s): %s", w.Promo, w.Group, err.Error())
+			c.AbortWithStatusJSON(http.StatusInternalServerError, gin.H{"errmsg": "An error occurs during users retrieval."})
+			return
+		}
+
+		var toAdd []WorkGrade
+		for _, user := range users {
+			if _, ok := known_users[user.Id]; !ok {
+				toAdd = append(toAdd, WorkGrade{
+					IdUser:  user.Id,
+					Login:   user.Login,
+					Grade:   0,
+					Comment: "- Non rendu -",
+				})
+			}
+		}
+
+		if len(toAdd) > 0 {
+			w.AddGrades(toAdd)
+		}
+
+		c.JSON(http.StatusOK, toAdd)
+	})
 	worksRoutes.PUT("/grades", func(c *gin.Context) {
 		w := c.MustGet("work").(*Work)