New setting: introduce a decote/discount to exercice's gain

libfic/db.go

@@ -3,6 +3,7 @@ package fic
 import (
 	"database/sql"
 	"errors"
+	"fmt"
 	"log"
 	"os"
 	"strings"
@@ -548,10 +549,22 @@ CREATE TABLE IF NOT EXISTS teams_qa_view(
 	if _, err := db.Exec("CREATE OR REPLACE VIEW exercice_distinct_tries_notgood AS SELECT id_exercice, id_team, MAX(time) AS time, cksum, nbdiff, MAX(onegood) AS onegood FROM exercice_tries_notgood GROUP BY id_team, id_exercice, cksum;"); err != nil {
 		return err
 	}
+	if err := DBRecreateDiscountedView(); err != nil {
+		return err
+	}
 
 	return nil
 }
 
+func DBRecreateDiscountedView() (err error) {
+	if db == nil {
+		return
+	}
+
+	_, err = db.Exec("CREATE OR REPLACE VIEW exercices_discounted AS SELECT E.id_exercice, E.id_theme, E.title, E.disabled, E.headline, E.url_id, E.path, E.statement, E.overview, E.issue, E.issue_kind, E.depend, E.gain - " + fmt.Sprintf("%f", DiscountedFactor) + " * E.gain * (COUNT(*) - 1) AS gain, E.coefficient_cur, E.finished, E.video_uri, E.resolution, E.seealso FROM exercices E LEFT OUTER JOIN exercice_solved S ON S.id_exercice = E.id_exercice GROUP BY E.id_exercice;")
+	return
+}
+
 // DBClose closes the connection to the database
 func DBClose() error {
 	return db.Close()