add initial space logic/behaviour

internal/repository/space.go

@@ -0,0 +1,108 @@
+package repository
+
+import (
+	"database/sql"
+	"errors"
+	"time"
+
+	"git.juancwu.dev/juancwu/budgit/internal/model"
+	"github.com/jmoiron/sqlx"
+)
+
+var (
+	ErrSpaceNotFound = errors.New("space not found")
+)
+
+type SpaceRepository interface {
+	Create(space *model.Space) error
+	ByID(id string) (*model.Space, error)
+	ByUserID(userID string) ([]*model.Space, error)
+	AddMember(spaceID, userID string, role model.Role) error
+	RemoveMember(spaceID, userID string) error
+	IsMember(spaceID, userID string) (bool, error)
+}
+
+type spaceRepository struct {
+	db *sqlx.DB
+}
+
+func NewSpaceRepository(db *sqlx.DB) SpaceRepository {
+	return &spaceRepository{db: db}
+}
+
+func (r *spaceRepository) Create(space *model.Space) error {
+	tx, err := r.db.Beginx()
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+
+	// Insert Space
+	querySpace := `INSERT INTO spaces (id, name, owner_id, created_at, updated_at) VALUES ($1, $2, $3, $4, $5);`
+	_, err = tx.Exec(querySpace, space.ID, space.Name, space.OwnerID, space.CreatedAt, space.UpdatedAt)
+	if err != nil {
+		return err
+	}
+
+	// Insert Owner as Member
+	queryMember := `INSERT INTO space_members (space_id, user_id, role, joined_at) VALUES ($1, $2, $3, $4);`
+	_, err = tx.Exec(queryMember, space.ID, space.OwnerID, model.RoleOwner, space.CreatedAt)
+	if err != nil {
+		return err
+	}
+
+	return tx.Commit()
+}
+
+func (r *spaceRepository) ByID(id string) (*model.Space, error) {
+	space := &model.Space{}
+	query := `SELECT * FROM spaces WHERE id = $1;`
+
+	err := r.db.Get(space, query, id)
+	if err == sql.ErrNoRows {
+		return nil, ErrSpaceNotFound
+	}
+
+	return space, err
+}
+
+func (r *spaceRepository) ByUserID(userID string) ([]*model.Space, error) {
+	var spaces []*model.Space
+	// Select spaces where user is a member
+	query := `
+		SELECT s.* 
+		FROM spaces s
+		JOIN space_members sm ON s.id = sm.space_id
+		WHERE sm.user_id = $1
+		ORDER BY s.created_at DESC;
+	`
+
+	err := r.db.Select(&spaces, query, userID)
+	if err != nil {
+		return nil, err
+	}
+
+	return spaces, nil
+}
+
+func (r *spaceRepository) AddMember(spaceID, userID string, role model.Role) error {
+	query := `INSERT INTO space_members (space_id, user_id, role, joined_at) VALUES ($1, $2, $3, $4);`
+	_, err := r.db.Exec(query, spaceID, userID, role, time.Now())
+	return err
+}
+
+func (r *spaceRepository) RemoveMember(spaceID, userID string) error {
+	query := `DELETE FROM space_members WHERE space_id = $1 AND user_id = $2;`
+	_, err := r.db.Exec(query, spaceID, userID)
+	return err
+}
+
+func (r *spaceRepository) IsMember(spaceID, userID string) (bool, error) {
+	var count int
+	query := `SELECT count(*) FROM space_members WHERE space_id = $1 AND user_id = $2;`
+	err := r.db.Get(&count, query, spaceID, userID)
+	if err != nil {
+		return false, err
+	}
+	return count > 0, nil
+}