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Use pointer receiver more offen

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This commit is contained in:
nemunaire 2021-11-22 15:35:07 +01:00
commit c7569b5e54
59 changed files with 688 additions and 672 deletions
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58
libfic/hint.go
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@ -36,42 +36,42 @@ func treatHintContent(h *EHint) {
}
// GetHint retrieves the hint with the given id.
func GetHint(id int64) (EHint, error) {
var h EHint
func GetHint(id int64) (*EHint, error) {
h := &EHint{}
if err := DBQueryRow("SELECT id_hint, id_exercice, title, content, cost FROM exercice_hints WHERE id_hint = ?", id).Scan(&h.Id, &h.IdExercice, &h.Title, &h.Content, &h.Cost); err != nil {
return h, err
return nil, err
}
treatHintContent(&h)
treatHintContent(h)
return h, nil
}
// GetHintByTitle retrieves the hint with the given id.
func (e Exercice) GetHintByTitle(id int64) (EHint, error) {
var h EHint
func (e *Exercice) GetHintByTitle(id int64) (*EHint, error) {
h := &EHint{}
if err := DBQueryRow("SELECT id_hint, id_exercice, title, content, cost FROM exercice_hints WHERE title = ? AND id_exercice = ?", id, e.Id).Scan(&h.Id, &h.IdExercice, &h.Title, &h.Content, &h.Cost); err != nil {
return h, err
return nil, err
}
treatHintContent(&h)
treatHintContent(h)
return h, nil
}
// GetHints returns a list of hints comming with the challenge.
func (e Exercice) GetHints() ([]EHint, error) {
func (e *Exercice) GetHints() ([]*EHint, error) {
if rows, err := DBQuery("SELECT id_hint, title, content, cost FROM exercice_hints WHERE id_exercice = ?", e.Id); err != nil {
return nil, err
} else {
defer rows.Close()
var hints = make([]EHint, 0)
var hints []*EHint
for rows.Next() {
var h EHint
h := &EHint{}
h.IdExercice = e.Id
if err := rows.Scan(&h.Id, &h.Title, &h.Content, &h.Cost); err != nil {
return nil, err
}
treatHintContent(&h)
treatHintContent(h)
hints = append(hints, h)
}
if err := rows.Err(); err != nil {
@ -83,18 +83,18 @@ func (e Exercice) GetHints() ([]EHint, error) {
}
// AddHint creates and fills a new struct EHint and registers it into the database.
func (e Exercice) AddHint(title string, content string, cost int64) (EHint, error) {
func (e *Exercice) AddHint(title string, content string, cost int64) (*EHint, error) {
if res, err := DBExec("INSERT INTO exercice_hints (id_exercice, title, content, cost) VALUES (?, ?, ?, ?)", e.Id, title, content, cost); err != nil {
return EHint{}, err
return nil, err
} else if hid, err := res.LastInsertId(); err != nil {
return EHint{}, err
return nil, err
} else {
return EHint{hid, e.Id, title, content, "", cost}, nil
return &EHint{hid, e.Id, title, content, "", cost}, nil
}
}
// Update applies modifications back to the database.
func (h EHint) Update() (int64, error) {
func (h *EHint) Update() (int64, error) {
if res, err := DBExec("UPDATE exercice_hints SET id_exercice = ?, title = ?, content = ?, cost = ? WHERE id_hint = ?", h.IdExercice, h.Title, h.Content, h.Cost, h.Id); err != nil {
return 0, err
} else if nb, err := res.RowsAffected(); err != nil {
@ -105,7 +105,7 @@ func (h EHint) Update() (int64, error) {
}
// Delete the hint from the database.
func (h EHint) Delete() (int64, error) {
func (h *EHint) Delete() (int64, error) {
if res, err := DBExec("DELETE FROM exercice_hints WHERE id_hint = ?", h.Id); err != nil {
return 0, err
} else if nb, err := res.RowsAffected(); err != nil {
@ -116,7 +116,7 @@ func (h EHint) Delete() (int64, error) {
}
// WipeHints deletes (only in the database, not on disk) hints coming with the challenge.
func (e Exercice) WipeHints() (int64, error) {
func (e *Exercice) WipeHints() (int64, error) {
if _, err := DBExec("DELETE FROM exercice_hints_okey_deps WHERE id_hint IN (SELECT id_hint FROM exercice_hints WHERE id_exercice = ?)", e.Id); err != nil {
return 0, err
} else if _, err := DBExec("DELETE FROM exercice_hints_omcq_deps WHERE id_hint IN (SELECT id_hint FROM exercice_hints WHERE id_exercice = ?)", e.Id); err != nil {
@ -131,20 +131,20 @@ func (e Exercice) WipeHints() (int64, error) {
}
// AddDepend insert a new dependency to a given flag.
func (h EHint) AddDepend(f Flag) (err error) {
if d, ok := f.(FlagKey); ok {
func (h *EHint) AddDepend(f Flag) (err error) {
if d, ok := f.(*FlagKey); ok {
_, err = DBExec("INSERT INTO exercice_hints_okey_deps (id_hint, id_flag_dep) VALUES (?, ?)", h.Id, d.Id)
} else if d, ok := f.(MCQ); ok {
} else if d, ok := f.(*MCQ); ok {
_, err = DBExec("INSERT INTO exercice_hints_omcq_deps (id_hint, id_mcq_dep) VALUES (?, ?)", h.Id, d.Id)
} else {
err = fmt.Errorf("Dependancy type for key (%T) not implemented for this flag.", f)
err = fmt.Errorf("dependancy type for key (%T) not implemented for this flag", f)
}
return
}
// GetDepends retrieve the flag's dependency list.
func (h EHint) GetDepends() ([]Flag, error) {
var deps = make([]Flag, 0)
func (h *EHint) GetDepends() ([]Flag, error) {
var deps []Flag
if rows, err := DBQuery("SELECT id_flag_dep FROM exercice_hints_okey_deps WHERE id_hint = ?", h.Id); err != nil {
return nil, err
@ -156,7 +156,7 @@ func (h EHint) GetDepends() ([]Flag, error) {
if err := rows.Scan(&d); err != nil {
return nil, err
}
deps = append(deps, FlagKey{Id: d, IdExercice: h.IdExercice})
deps = append(deps, &FlagKey{Id: d, IdExercice: h.IdExercice})
}
if err := rows.Err(); err != nil {
return nil, err
@ -173,7 +173,7 @@ func (h EHint) GetDepends() ([]Flag, error) {
if err := rows.Scan(&d); err != nil {
return nil, err
}
deps = append(deps, MCQ{Id: d, IdExercice: h.IdExercice})
deps = append(deps, &MCQ{Id: d, IdExercice: h.IdExercice})
}
if err := rows.Err(); err != nil {
return nil, err
@ -184,10 +184,10 @@ func (h EHint) GetDepends() ([]Flag, error) {
}
// GetExercice returns the parent Exercice where this hint can be found.
func (h EHint) GetExercice() (Exercice, error) {
func (h *EHint) GetExercice() (*Exercice, error) {
var eid int64
if err := DBQueryRow("SELECT id_exercice FROM exercice_hints WHERE id_hint = ?", h.Id).Scan(&eid); err != nil {
return Exercice{}, err
return nil, err
}
return GetExercice(eid)