feat: add postgres-backed repositories

internal/postgres/feedback_repository.go

@@ -0,0 +1,61 @@
+package postgres
+
+import (
+	"database/sql"
+
+	"gitlab.mareshq.com/hq/backoffice/backoffice-api/pkg/training"
+)
+
+type FeedbackRepository struct {
+	db *sql.DB
+}
+
+func NewFeedbackRepository(db *sql.DB) *FeedbackRepository {
+	return &FeedbackRepository{db: db}
+}
+
+func (r *FeedbackRepository) Get(id training.FeedbackID) (*training.Feedback, error) {
+	var f training.Feedback
+	err := r.db.QueryRow("SELECT * FROM feedback WHERE id = $1", id).Scan(&f.ID, &f.AttendeeID, &f.Rating, &f.Comment, &f.IsAnonymous, &f.IsSharingAllowed)
+	if err != nil {
+		return nil, err
+	}
+
+	return &f, nil
+}
+
+func (r *FeedbackRepository) FindAll() ([]training.Feedback, error) {
+	rows, err := r.db.Query("SELECT * FROM feedback")
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var feedbacks []training.Feedback
+	for rows.Next() {
+		var f training.Feedback
+		err := rows.Scan(&f.ID, &f.AttendeeID, &f.Rating, &f.Comment, &f.IsAnonymous, &f.IsSharingAllowed)
+		if err != nil {
+			return nil, err
+		}
+
+		feedbacks = append(feedbacks, f)
+	}
+
+	return feedbacks, nil
+}
+
+func (r *FeedbackRepository) Save(f *training.Feedback) error {
+	_, err := r.db.Exec("INSERT INTO feedback (id, attendee_id, rating, comment, is_anonymous, is_sharing_allowed) VALUES ($1, $2, $3, $4, $5, $6)", f.ID, f.AttendeeID, f.Rating, f.Comment, f.IsAnonymous, f.IsSharingAllowed)
+	return err
+}
+
+func (r *FeedbackRepository) Update(f *training.Feedback) error {
+	_, err := r.db.Exec("UPDATE feedback SET attendee_id = $2, rating = $3, comment = $4, is_anonymous = $5, is_sharing_allowed = $6 WHERE id = $1", f.ID, f.AttendeeID, f.Rating, f.Comment, f.IsAnonymous, f.IsSharingAllowed)
+	return err
+}
+
+func (r *FeedbackRepository) Delete(id training.FeedbackID) error {
+	_, err := r.db.Exec("DELETE FROM feedback WHERE id = $1", id)
+	return err
+}