Integrate key providers

cmd/podsync/updater.go

@@ -31,14 +31,26 @@ type Updater struct {
 	downloader Downloader
 	db         db.Storage
 	fs         fs.Storage
+	keys       map[model.Provider]feed.KeyProvider
 }
 
 func NewUpdater(config *config.Config, downloader Downloader, db db.Storage, fs fs.Storage) (*Updater, error) {
+	keys := map[model.Provider]feed.KeyProvider{}
+
+	for name, list := range config.Tokens {
+		provider, err := feed.NewKeyProvider(list)
+		if err != nil {
+			return nil, errors.Wrapf(err, "failed to create key provider for %q", name)
+		}
+		keys[name] = provider
+	}
+
 	return &Updater{
 		config:     config,
 		downloader: downloader,
 		db:         db,
 		fs:         fs,
+		keys:       keys,
 	}, nil
 }
 
@@ -79,7 +91,7 @@ func (u *Updater) Update(ctx context.Context, feedConfig *config.Feed) error {
 // updateFeed pulls API for new episodes and saves them to database
 func (u *Updater) updateFeed(ctx context.Context, feedConfig *config.Feed) error {
 	// Create an updater for this feed type
-	provider, err := feed.New(ctx, feedConfig, u.config.Tokens)
+	provider, err := feed.New(ctx, feedConfig, u.keys)
 	if err != nil {
 		return err
 	}

pkg/config/config.go

@@ -56,15 +56,6 @@ type Custom struct {
 	Language string `toml:"lang"`
 }
 
-type Tokens struct {
-	// YouTube API key.
-	// See https://developers.google.com/youtube/registering_an_application
-	YouTube StringSlice `toml:"youtube"`
-	// Vimeo developer key.
-	// See https://developer.vimeo.com/api/guides/start#generate-access-token
-	Vimeo StringSlice `toml:"vimeo"`
-}
-
 type Server struct {
 	// Hostname to use for download links
 	Hostname string `toml:"hostname"`
@@ -123,7 +114,7 @@ type Config struct {
 	// ID will be used as feed ID in http://podsync.net/{FEED_ID}.xml
 	Feeds map[string]*Feed
 	// Tokens is API keys to use to access YouTube/Vimeo APIs.
-	Tokens Tokens `toml:"tokens"`
+	Tokens map[model.Provider]StringSlice `toml:"tokens"`
 	// Downloader (youtube-dl) configuration
 	Downloader Downloader `toml:"downloader"`
 }

pkg/config/config_test.go

@@ -54,11 +54,11 @@ self_update = true
 
 	assert.Equal(t, "/home/user/db/", config.Database.Dir)
 
-	require.Len(t, config.Tokens.YouTube, 1)
-	assert.Equal(t, "123", config.Tokens.YouTube[0])
-	require.Len(t, config.Tokens.Vimeo, 2)
-	assert.Equal(t, "321", config.Tokens.Vimeo[0])
-	assert.Equal(t, "456", config.Tokens.Vimeo[1])
+	require.Len(t, config.Tokens["youtube"], 1)
+	assert.Equal(t, "123", config.Tokens["youtube"][0])
+	require.Len(t, config.Tokens["vimeo"], 2)
+	assert.Equal(t, "321", config.Tokens["vimeo"][0])
+	assert.Equal(t, "456", config.Tokens["vimeo"][1])
 
 	assert.Len(t, config.Feeds, 1)
 	feed, ok := config.Feeds["XYZ"]
@@ -99,8 +99,8 @@ data_dir = "/data"
 	assert.NoError(t, err)
 	require.NotNil(t, config)
 
-	require.Len(t, config.Tokens.YouTube, 0)
-	require.Len(t, config.Tokens.Vimeo, 0)
+	require.Len(t, config.Tokens, 1)
+	require.Len(t, config.Tokens["vimeo"], 0)
 }
 
 func TestApplyDefaults(t *testing.T) {

pkg/feed/common.go

@@ -13,27 +13,25 @@ type Builder interface {
 	Build(ctx context.Context, cfg *config.Feed) (*model.Feed, error)
 }
 
-func New(ctx context.Context, cfg *config.Feed, tokens config.Tokens) (Builder, error) {
-	var (
-		provider Builder
-		err      error
-	)
-
+func New(ctx context.Context, cfg *config.Feed, keys map[model.Provider]KeyProvider) (Builder, error) {
 	info, err := ParseURL(cfg.URL)
 	if err != nil {
 		return nil, err
 	}
 
+	keyProvider, ok := keys[info.Provider]
+	if !ok {
+		return nil, errors.Errorf("unknown key provider: %s", info.Provider)
+	}
+
 	switch info.Provider {
 	case model.ProviderYoutube:
-		provider, err = NewYouTubeBuilder(tokens.YouTube[0])
+		return NewYouTubeBuilder(keyProvider.Get())
 	case model.ProviderVimeo:
-		provider, err = NewVimeoBuilder(ctx, tokens.Vimeo[0])
+		return NewVimeoBuilder(ctx, keyProvider.Get())
 	default:
 		return nil, errors.Errorf("unsupported provider %q", info.Provider)
 	}
-
-	return provider, err
 }
 
 type feedProvider interface {

pkg/feed/key.go

@@ -10,6 +10,17 @@ type KeyProvider interface {
 	Get() string
 }
 
+func NewKeyProvider(keys []string) (KeyProvider, error) {
+	switch len(keys) {
+	case 0:
+		return nil, errors.New("no keys")
+	case 1:
+		return NewFixedKey(keys[0])
+	default:
+		return NewRotatedKeys(keys)
+	}
+}
+
 type FixedKeyProvider struct {
 	key string
 }