libfic: start working on MCQ: structures done

libfic/mcq.go

@@ -0,0 +1,121 @@
+package fic
+
+import (
+)
+
+type MCQ struct {
+	Id         int64       `json:"id"`
+	IdExercice int64       `json:"idExercice"`
+	Title      string      `json:"title"`
+	Kind       string      `json:"kind"`
+	Entries    []MCQ_entry `json:"entries"`
+}
+
+type MCQ_entry struct {
+	Id       int64  `json:"id"`
+	Label    string `json:"label"`
+	Response bool   `json:"response"`
+}
+
+func (e Exercice) GetMCQ() ([]MCQ, error) {
+	if rows, err := DBQuery("SELECT id_mcq, id_exercice, title, kind FROM exercice_mcq WHERE id_exercice = ?", e.Id); err != nil {
+		return nil, err
+	} else {
+		defer rows.Close()
+
+		var mcqs = make([]MCQ, 0)
+		for rows.Next() {
+			var m MCQ
+			m.IdExercice = e.Id
+
+			if err := rows.Scan(&m.Id, &m.IdExercice, &m.Title, &m.Kind); err != nil {
+				return nil, err
+			}
+
+			if entries_rows, err := DBQuery("SELECT id_mcq, id_exercice, label, response FROM mcq_entries WHERE id_mcq = ?", m.Id); err != nil {
+				return nil, err
+			} else {
+				defer entries_rows.Close()
+
+				mcqs = append(mcqs, m)
+			}
+		}
+		if err := rows.Err(); err != nil {
+			return nil, err
+		}
+
+		return mcqs, nil
+	}
+}
+
+func (e Exercice) AddMCQ(title string, kind string) (MCQ, error) {
+	if res, err := DBExec("INSERT INTO exercice_mcq (id_exercice, title, kind) VALUES (?, ?, ?)", e.Id, title, kind); err != nil {
+		return MCQ{}, err
+	} else if qid, err := res.LastInsertId(); err != nil {
+		return MCQ{}, err
+	} else {
+		return MCQ{qid, e.Id, title, kind, []MCQ_entry{}}, nil
+	}
+}
+
+func (m MCQ) Update() (int64, error) {
+	if res, err := DBExec("UPDATE exercice_mcq SET id_exercice = ?, title = ?, kind = ? WHERE id_mcq = ?", m.IdExercice, m.Title, m.Kind, m.Id); err != nil {
+		return 0, err
+	} else if nb, err := res.RowsAffected(); err != nil {
+		return 0, err
+	} else {
+		return nb, err
+	}
+}
+
+func (m MCQ) Delete() (int64, error) {
+	if res, err := DBExec("DELETE FROM exercice_mcq WHERE id_mcq = ?", m.Id); err != nil {
+		return 0, err
+	} else if nb, err := res.RowsAffected(); err != nil {
+		return 0, err
+	} else {
+		return nb, err
+	}
+}
+
+func (m MCQ) AddEntry(label string, response bool) (MCQ_entry, error) {
+	if res, err := DBExec("INSERT INTO mcq_entries (id_mcq, label, response) VALUES (?, ?, ?)", m.Id, label, response); err != nil {
+		return MCQ_entry{}, err
+	} else if nid, err := res.LastInsertId(); err != nil {
+		return MCQ_entry{}, err
+	} else {
+		return MCQ_entry{nid, label, response}, nil
+	}
+}
+
+func (n MCQ_entry) Update() (int64, error) {
+	if res, err := DBExec("UPDATE mcq_entries SET label = ?, response = ? WHERE id_mcq = ?", n.Label, n.Response, n.Id); err != nil {
+		return 0, err
+	} else if nb, err := res.RowsAffected(); err != nil {
+		return 0, err
+	} else {
+		return nb, err
+	}
+}
+
+func (n MCQ_entry) Delete() (int64, error) {
+	if res, err := DBExec("DELETE FROM mcq_entries WHERE id_mcq_entry = ?", n.Id); err != nil {
+		return 0, err
+	} else if nb, err := res.RowsAffected(); err != nil {
+		return 0, err
+	} else {
+		return nb, err
+	}
+}
+
+func (m MCQ) Check(vals map[int64]bool) int {
+	diff := 0
+	for _, n := range m.Entries {
+		if v, ok := vals[n.Id]; ok && v == n.Response {
+			continue
+		}
+		diff += 1
+	}
+
+	return diff
+}