refactor: make cookie architecture less crazy

cmd/Desktop-Bridge/main.go

@@ -275,7 +275,7 @@ func run(context *cli.Context) (contextError error) { // nolint[funlen]
 	cm.SetRoundTripper(cfg.GetRoundTripper(cm, eventListener))
 
 	// Cookies must be persisted across restarts.
-	jar, err := cookies.NewCookieJar(cookies.NewPersister(pref))
+	jar, err := cookies.NewCookieJar(pref)
 	if err != nil {
 		logrus.WithError(err).Warn("Could not create cookie jar")
 	} else {

internal/cookies/jar.go

@@ -30,18 +30,25 @@ import (
 // Jar implements http.CookieJar by wrapping the standard library's cookiejar.Jar.
 // The jar uses a Persister to load cookies at startup and save cookies when set.
 type Jar struct {
-	jar       *cookiejar.Jar
+	jar    *cookiejar.Jar
-	persister *Persister
+	pantry *pantry
-	locker    sync.Locker
+	locker sync.Locker
 }
 
-func NewCookieJar(persister *Persister) (*Jar, error) {
+type GetterSetter interface {
-	jar, err := cookiejar.New(nil)
+	Get(string) string
+	Set(string, string)
+}
+
+func NewCookieJar(getterSetter GetterSetter) (*Jar, error) {
+	pantry := &pantry{prefs: getterSetter}
+
+	cookies, err := pantry.loadCookies()
 	if err != nil {
 		return nil, err
 	}
 
-	cookies, err := persister.Load()
+	jar, err := cookiejar.New(nil)
 	if err != nil {
 		return nil, err
 	}
@@ -56,9 +63,9 @@ func NewCookieJar(persister *Persister) (*Jar, error) {
 	}
 
 	return &Jar{
-		jar:       jar,
+		jar:    jar,
-		persister: persister,
+		pantry: pantry,
-		locker:    &sync.Mutex{},
+		locker: &sync.Mutex{},
 	}, nil
 }
 
@@ -68,7 +75,7 @@ func (j *Jar) SetCookies(u *url.URL, cookies []*http.Cookie) {
 
 	j.jar.SetCookies(u, cookies)
 
-	if err := j.persister.Persist(u.String(), cookies); err != nil {
+	if err := j.pantry.persistCookies(u.String(), cookies); err != nil {
 		logrus.WithError(err).Warn("Failed to persist cookie")
 	}
 }

internal/cookies/jar_test.go

@@ -36,7 +36,7 @@ func TestJar(t *testing.T) {
 	ts := getTestServer(t, testCookies...)
 	defer ts.Close()
 
-	jar, err := NewCookieJar(NewPersister(make(testPersister)))
+	jar, err := NewCookieJar(make(testGetterSetter))
 	require.NoError(t, err)
 
 	client := &http.Client{Jar: jar}
@@ -86,12 +86,12 @@ func getTestServer(t *testing.T, wantCookies ...testCookie) *httptest.Server {
 	return httptest.NewServer(mux)
 }
 
-type testPersister map[string]string
+type testGetterSetter map[string]string
 
-func (p testPersister) Set(key, value string) {
+func (p testGetterSetter) Set(key, value string) {
 	p[key] = value
 }
 
-func (p testPersister) Get(key string) string {
+func (p testGetterSetter) Get(key string) string {
 	return p[key]
 }

internal/cookies/pantry.go

@@ -24,39 +24,30 @@ import (
 	"github.com/ProtonMail/proton-bridge/internal/preferences"
 )
 
-type Persister struct {
+type pantry struct {
 	prefs GetterSetter
 }
 
-type GetterSetter interface {
+func (p *pantry) persistCookies(url string, cookies []*http.Cookie) error {
-	Get(string) string
-	Set(string, string)
-}
-
-func NewPersister(prefs GetterSetter) *Persister {
-	return &Persister{prefs: prefs}
-}
-
-func (p *Persister) Persist(url string, cookies []*http.Cookie) error {
 	b, err := json.Marshal(cookies)
 	if err != nil {
 		return err
 	}
 
-	val, err := p.load()
+	val, err := p.loadFromJSON()
 	if err != nil {
 		return err
 	}
 
 	val[url] = string(b)
 
-	return p.save(val)
+	return p.saveToJSON(val)
 }
 
-func (p *Persister) Load() (map[string][]*http.Cookie, error) {
+func (p *pantry) loadCookies() (map[string][]*http.Cookie, error) {
 	res := make(map[string][]*http.Cookie)
 
-	val, err := p.load()
+	val, err := p.loadFromJSON()
 	if err != nil {
 		return nil, err
 	}
@@ -76,15 +67,11 @@ func (p *Persister) Load() (map[string][]*http.Cookie, error) {
 
 type dataStructure map[string]string
 
-func (p *Persister) load() (dataStructure, error) {
+func (p *pantry) loadFromJSON() (dataStructure, error) {
 	b := p.prefs.Get(preferences.CookiesKey)
 
 	if b == "" {
-		if err := p.save(make(dataStructure)); err != nil {
+		return make(dataStructure), nil
-			return nil, err
-		}
-
-		return p.load()
 	}
 
 	var val dataStructure
@@ -96,7 +83,7 @@ func (p *Persister) load() (dataStructure, error) {
 	return val, nil
 }
 
-func (p *Persister) save(val dataStructure) error {
+func (p *pantry) saveToJSON(val dataStructure) error {
 	b, err := json.Marshal(val)
 	if err != nil {
 		return err