feat: add contact repository and base repository for shared db logic

internal/repository/contact_repository.go

@@ -0,0 +1,57 @@
+package repository
+
+import (
+	"database/sql"
+
+	"gitea.gabilandia.com/gabdlr/agenda-web-go/internal/models"
+)
+
+type ContactRepository struct {
+	baseRepository[models.Contact]
+}
+
+func NewContactRepository(db *sql.DB) *ContactRepository {
+	return &ContactRepository{
+		baseRepository[models.Contact]{
+			db:        db,
+			tableName: "contacts",
+		}}
+}
+
+func (r *ContactRepository) Create(contact *models.Contact) (int64, error) {
+	query := r.BuildQuery("INSERT INTO %s (name, company, phone) VALUES (?, ?, ?)")
+
+	result, err := r.db.Exec(
+		query,
+		contact.Name, contact.Company, contact.Phone,
+	)
+	if err != nil {
+		return 0, err
+	}
+
+	id, err := result.LastInsertId()
+	if err != nil {
+		return 0, err
+	}
+
+	contact.ID = int(id)
+	return id, nil
+}
+
+func (r *ContactRepository) Update(contact *models.Contact) (int64, error) {
+	query := r.BuildQuery("UPDATE %s SET name = ?, company = ?, phone = ? WHERE id = ?")
+	result, err := r.db.Exec(query,
+		contact.Name, contact.Company, contact.Phone, contact.ID,
+	)
+
+	if err != nil {
+		return 0, err
+	}
+
+	rowsAffected, err := result.RowsAffected()
+	if err != nil {
+		return 0, err
+	}
+
+	return rowsAffected, nil
+}