admin: Add exercice's tags: sync, api, interface done

libfic/db.go

@@ -246,6 +246,15 @@ CREATE TABLE IF NOT EXISTS exercice_tries(
   FOREIGN KEY(id_exercice) REFERENCES exercices(id_exercice),
   FOREIGN KEY(id_team) REFERENCES teams(id_team)
 ) DEFAULT CHARACTER SET = utf8mb4 COLLATE = utf8mb4_unicode_ci;
+`); err != nil {
+		return err
+	}
+	if _, err := db.Exec(`
+CREATE TABLE IF NOT EXISTS exercice_tags(
+  id_exercice INTEGER NOT NULL,
+  tag VARCHAR(255) NOT NULL,
+  FOREIGN KEY(id_exercice) REFERENCES exercices(id_exercice)
+) DEFAULT CHARACTER SET = utf8 COLLATE = utf8_bin;
 `); err != nil {
 		return err
 	}

libfic/exercice_tag.go

@@ -0,0 +1,52 @@
+package fic
+
+// GetTags returns tags associated with this exercice.
+func (e Exercice) GetTags() (tags []string, err error) {
+	if rows, errr := DBQuery("SELECT tag FROM exercice_tags WHERE id_exercice = ?", e.Id); errr != nil {
+		return nil, errr
+	} else {
+		defer rows.Close()
+
+		tags = make([]string, 0)
+		for rows.Next() {
+			var t string
+			if err = rows.Scan(&t); err != nil {
+				return
+			}
+			tags = append(tags, t)
+		}
+		err = rows.Err()
+		return
+	}
+}
+
+// AddTag assign a new tag to the exercice and registers it into the database.
+func (e Exercice) AddTag(tag string) (string, error) {
+	if _, err := DBExec("INSERT INTO exercice_tags (id_exercice, tag) VALUES (?, ?)", e.Id, tag); err != nil {
+		return "", err
+	} else {
+		return tag, nil
+	}
+}
+
+// DeleteTag delete a tag assigned to the current exercice from the database.
+func (e Exercice) DeleteTag(tag string) (int64, error) {
+	if res, err := DBExec("DELETE FROM exercice_tags WHERE id_exercice = ? AND tag = ?", e.Id, tag); err != nil {
+		return 0, err
+	} else if nb, err := res.RowsAffected(); err != nil {
+		return 0, err
+	} else {
+		return nb, err
+	}
+}
+
+// WipeTags delete all tag assigned to the current exercice from the database.
+func (e Exercice) WipeTags() (int64, error) {
+	if res, err := DBExec("DELETE FROM exercice_tags WHERE id_exercice = ?", e.Id); err != nil {
+		return 0, err
+	} else if nb, err := res.RowsAffected(); err != nil {
+		return 0, err
+	} else {
+		return nb, err
+	}
+}

libfic/reset.go

@@ -34,7 +34,7 @@ func ResetGame() (error) {
 
 // ResetExercices wipes out all challenges (both attempts and statements).
 func ResetExercices() (error) {
-	return truncateTable("team_hints", "exercice_files_deps", "exercice_files", "flag_found", "exercice_flags", "exercice_solved", "exercice_tries", "exercice_hints", "mcq_found", "mcq_entries", "exercice_mcq", "exercices", "themes")
+	return truncateTable("team_hints", "exercice_files_deps", "exercice_files", "flag_found", "exercice_flags", "exercice_solved", "exercice_tries", "exercice_hints", "mcq_found", "mcq_entries", "exercice_mcq", "exercice_tags", "exercices", "themes")
 }
 
 // ResetTeams wipes out all teams, incluings members and attempts.

libfic/theme_export.go

@@ -6,12 +6,13 @@ import (
 
 // exportedExercice is a structure representing a challenge, as exposed to players.
 type exportedExercice struct {
-	Title  string  `json:"title"`
-	URLId  string  `json:"urlid"`
-	Gain   int64   `json:"gain"`
-	Coeff  float64 `json:"curcoeff"`
-	Solved int64   `json:"solved"`
-	Tried  int64   `json:"tried"`
+	Title  string   `json:"title"`
+	URLId  string   `json:"urlid"`
+	Tags   []string `json:"tags"`
+	Gain   int64    `json:"gain"`
+	Coeff  float64  `json:"curcoeff"`
+	Solved int64    `json:"solved"`
+	Tried  int64    `json:"tried"`
 }
 
 // exportedTheme is a structure representing a Theme, as exposed to players.
@@ -35,9 +36,11 @@ func ExportThemes() (interface{}, error) {
 			} else {
 				exos := map[string]exportedExercice{}
 				for _, exercice := range exercices {
+					tags, _ := exercice.GetTags()
 					exos[fmt.Sprintf("%d", exercice.Id)] = exportedExercice{
 						exercice.Title,
 						exercice.URLId,
+						tags,
 						exercice.Gain,
 						exercice.Coefficient,
 						exercice.SolvedCount(),