mirror of
https://github.com/zarzet/SpotiFLAC-Mobile.git
synced 2026-07-28 23:08:59 +02:00
1197 lines
40 KiB
Go
1197 lines
40 KiB
Go
package gobackend
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import (
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"errors"
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"fmt"
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"os"
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"path/filepath"
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"strings"
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"time"
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)
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func manifestCapabilityStringList(manifest *ExtensionManifest, key string) []string {
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if manifest == nil || manifest.Capabilities == nil {
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return nil
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}
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raw, ok := manifest.Capabilities[key]
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if !ok {
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return nil
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}
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values, ok := raw.([]any)
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if !ok {
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return nil
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}
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result := make([]string, 0, len(values))
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for _, value := range values {
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str, ok := value.(string)
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if !ok {
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continue
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}
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trimmed := strings.ToLower(strings.TrimSpace(str))
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if trimmed == "" {
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continue
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}
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result = append(result, trimmed)
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}
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return result
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}
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func extensionReplacesBuiltInProvider(ext *loadedExtension, providerID string) bool {
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if ext == nil {
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return false
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}
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normalized := strings.ToLower(strings.TrimSpace(providerID))
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if normalized == "" {
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return false
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}
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for _, replaced := range manifestCapabilityStringList(ext.Manifest, "replacesBuiltInProviders") {
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if replaced == normalized {
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return true
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}
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}
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return false
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}
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func trimKnownProviderPrefix(trackID, providerID string) string {
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trimmedID := strings.TrimSpace(trackID)
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normalizedProvider := strings.ToLower(strings.TrimSpace(providerID))
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if trimmedID == "" || normalizedProvider == "" {
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return trimmedID
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}
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prefix := normalizedProvider + ":"
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if strings.HasPrefix(strings.ToLower(trimmedID), prefix) {
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return trimmedID[len(prefix):]
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}
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return trimmedID
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}
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func resolvePreferredTrackIDForExtension(ext *loadedExtension, req DownloadRequest, explicitTrackID string) string {
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candidates := make([]string, 0, 8)
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appendCandidate := func(value string) {
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trimmed := strings.TrimSpace(value)
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if trimmed == "" {
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return
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}
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for _, existing := range candidates {
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if existing == trimmed {
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return
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}
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}
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candidates = append(candidates, trimmed)
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}
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appendCandidate(explicitTrackID)
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if extensionReplacesBuiltInProvider(ext, "tidal") {
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appendCandidate(req.TidalID)
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appendCandidate(trimKnownProviderPrefix(req.SpotifyID, "tidal"))
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}
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if extensionReplacesBuiltInProvider(ext, "qobuz") {
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appendCandidate(req.QobuzID)
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appendCandidate(trimKnownProviderPrefix(req.SpotifyID, "qobuz"))
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}
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if extensionReplacesBuiltInProvider(ext, "deezer") {
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appendCandidate(req.DeezerID)
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appendCandidate(trimKnownProviderPrefix(req.SpotifyID, "deezer"))
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}
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if extensionReplacesBuiltInProvider(ext, "spotify") {
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appendCandidate(trimKnownProviderPrefix(req.SpotifyID, "spotify"))
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appendCandidate(req.SpotifyID)
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}
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appendCandidate(req.SpotifyID)
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appendCandidate(req.TidalID)
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appendCandidate(req.QobuzID)
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appendCandidate(req.DeezerID)
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if len(candidates) == 0 {
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return ""
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}
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return candidates[0]
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}
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func normalizeDownloadResultExtension(candidates ...string) string {
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for _, candidate := range candidates {
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ext := strings.TrimSpace(strings.ToLower(candidate))
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if ext == "" {
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continue
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}
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if !strings.HasPrefix(ext, ".") {
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ext = "." + ext
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}
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if ext == ".mp4" {
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return ".m4a"
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}
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return ext
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}
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return ""
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}
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func normalizeExtensionDownloadResult(result *ExtDownloadResult) (DownloadResult, bool) {
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if result == nil {
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return DownloadResult{}, false
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}
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downloadResult := DownloadResult{
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FilePath: strings.TrimSpace(result.FilePath),
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BitDepth: result.BitDepth,
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SampleRate: result.SampleRate,
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AudioCodec: strings.TrimSpace(result.AudioCodec),
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Title: result.Title,
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Artist: result.Artist,
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Album: result.Album,
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ReleaseDate: result.ReleaseDate,
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TrackNumber: result.TrackNumber,
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TotalTracks: result.TotalTracks,
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DiscNumber: result.DiscNumber,
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TotalDiscs: result.TotalDiscs,
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ISRC: result.ISRC,
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CoverURL: result.CoverURL,
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Genre: result.Genre,
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Label: result.Label,
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Copyright: result.Copyright,
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Composer: result.Composer,
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LyricsLRC: result.LyricsLRC,
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DecryptionKey: result.DecryptionKey,
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Decryption: normalizeDownloadDecryptionInfo(result.Decryption, result.DecryptionKey),
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ActualExtension: normalizeDownloadResultExtension(result.ActualExtension, result.OutputExtension),
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ActualContainer: strings.TrimSpace(result.ActualContainer),
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RequiresContainerConversion: result.RequiresContainerConversion,
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}
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alreadyExists := result.AlreadyExists
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if strings.HasPrefix(downloadResult.FilePath, "EXISTS:") {
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alreadyExists = true
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downloadResult.FilePath = strings.TrimPrefix(downloadResult.FilePath, "EXISTS:")
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}
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enrichResultQualityFromFile(&downloadResult)
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return downloadResult, alreadyExists
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}
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// overlayStr sets *dst = src when dst is empty and src is not. If field is
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// non-empty it logs "<field> from enrichment: <src>" on overlay.
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func overlayStr(dst *string, src, field string) {
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if src == "" || *dst != "" {
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return
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}
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*dst = src
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if field != "" {
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GoLog("[DownloadWithExtensionFallback] %s from enrichment: %s\n", field, src)
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}
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}
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// overlayStrTrim is overlayStr but treats a whitespace-only dst as empty too.
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func overlayStrTrim(dst *string, src string) {
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if src == "" || strings.TrimSpace(*dst) != "" {
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return
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}
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*dst = src
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}
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// overlayInt sets *dst = src when dst is zero and src is positive. If field is
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// non-empty it logs "<field> from enrichment: <src>" on overlay.
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func overlayInt(dst *int, src int, field string) {
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if src <= 0 || *dst != 0 {
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return
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}
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*dst = src
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if field != "" {
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GoLog("[DownloadWithExtensionFallback] %s from enrichment: %d\n", field, src)
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}
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}
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func overlayExtensionDownloadMetadata(resp *DownloadResponse, result *ExtDownloadResult) {
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if resp == nil || result == nil {
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return
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}
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overlayStrTrim(&resp.Title, result.Title)
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overlayStrTrim(&resp.Artist, result.Artist)
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overlayStrTrim(&resp.Album, result.Album)
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overlayStrTrim(&resp.AlbumArtist, result.AlbumArtist)
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overlayInt(&resp.TrackNumber, result.TrackNumber, "")
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overlayInt(&resp.DiscNumber, result.DiscNumber, "")
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overlayInt(&resp.TotalTracks, result.TotalTracks, "")
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overlayInt(&resp.TotalDiscs, result.TotalDiscs, "")
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overlayStrTrim(&resp.ReleaseDate, result.ReleaseDate)
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overlayStrTrim(&resp.CoverURL, result.CoverURL)
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overlayStrTrim(&resp.ISRC, result.ISRC)
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overlayStrTrim(&resp.Genre, result.Genre)
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overlayStrTrim(&resp.Label, result.Label)
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overlayStrTrim(&resp.Copyright, result.Copyright)
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overlayStrTrim(&resp.Composer, result.Composer)
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if result.LyricsLRC != "" {
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resp.LyricsLRC = result.LyricsLRC
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}
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if result.DecryptionKey != "" {
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resp.DecryptionKey = result.DecryptionKey
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}
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if normalized := normalizeDownloadDecryptionInfo(result.Decryption, result.DecryptionKey); normalized != nil {
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resp.Decryption = normalized
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}
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if ext := normalizeDownloadResultExtension(result.ActualExtension, result.OutputExtension); ext != "" {
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resp.ActualExtension = ext
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}
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if container := strings.TrimSpace(result.ActualContainer); container != "" {
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resp.ActualContainer = container
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}
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if result.RequiresContainerConversion {
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resp.RequiresContainerConversion = true
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}
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}
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func applyExtensionRequestFallbacks(resp *DownloadResponse, req DownloadRequest) {
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if resp == nil {
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return
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}
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overlayStr(&resp.Album, req.AlbumName, "")
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overlayStr(&resp.AlbumArtist, req.AlbumArtist, "")
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overlayStr(&resp.ReleaseDate, req.ReleaseDate, "")
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overlayStr(&resp.ISRC, req.ISRC, "")
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overlayInt(&resp.TrackNumber, req.TrackNumber, "")
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overlayInt(&resp.TotalTracks, req.TotalTracks, "")
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overlayInt(&resp.DiscNumber, req.DiscNumber, "")
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overlayInt(&resp.TotalDiscs, req.TotalDiscs, "")
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overlayStr(&resp.CoverURL, req.CoverURL, "")
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}
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func shouldStopProviderFallback(availability *ExtAvailabilityResult) bool {
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return availability != nil && availability.SkipFallback
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}
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func fallbackRuntimeHealthStatus(ext *loadedExtension) string {
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if ext == nil || ext.Manifest == nil || len(ext.Manifest.ServiceHealth) == 0 {
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return "unknown"
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}
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status := strings.ToLower(strings.TrimSpace(CheckExtensionHealthCached(ext).Status))
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switch status {
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case "online", "degraded", "offline":
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return status
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default:
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return "unknown"
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}
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}
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func prioritizeFallbackProvidersByHealth(priority []string, extManager *extensionManager, sourceProvider string) []string {
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if len(priority) == 0 || extManager == nil {
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return priority
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}
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online := make([]string, 0, len(priority))
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degraded := make([]string, 0, len(priority))
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unknown := make([]string, 0, len(priority))
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for _, rawProviderID := range priority {
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providerID := strings.TrimSpace(rawProviderID)
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if providerID == "" {
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continue
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}
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if strings.EqualFold(providerID, sourceProvider) || !isExtensionFallbackAllowed(providerID) {
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unknown = append(unknown, providerID)
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continue
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}
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ext, err := extManager.GetExtension(providerID)
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if err != nil || ext == nil || !ext.Enabled || ext.Error != "" || ext.Manifest == nil || !ext.Manifest.IsDownloadProvider() {
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unknown = append(unknown, providerID)
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continue
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}
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switch fallbackRuntimeHealthStatus(ext) {
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case "online":
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online = append(online, providerID)
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case "degraded":
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degraded = append(degraded, providerID)
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case "offline":
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GoLog("[DownloadWithExtensionFallback] Skipping extension provider %s (service health offline)\n", providerID)
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default:
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unknown = append(unknown, providerID)
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}
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}
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result := make([]string, 0, len(online)+len(degraded)+len(unknown))
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result = append(result, online...)
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result = append(result, degraded...)
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result = append(result, unknown...)
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return result
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}
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func resolveExtensionAvailabilityReason(availability *ExtAvailabilityResult, err error) string {
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if availability != nil {
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if reason := strings.TrimSpace(availability.Reason); reason != "" {
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return reason
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}
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}
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if err != nil {
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return err.Error()
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}
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return "extension requested no further fallback"
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}
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func buildExtensionFallbackStoppedResponse(providerID string, availability *ExtAvailabilityResult, err error) *DownloadResponse {
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reason := resolveExtensionAvailabilityReason(availability, err)
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errorType := classifyDownloadErrorType(reason)
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if errorType == "unknown" {
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errorType = "extension_error"
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}
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return &DownloadResponse{
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Success: false,
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Error: fmt.Sprintf("Fallback stopped by %s: %s", providerID, reason),
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ErrorType: errorType,
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Service: providerID,
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}
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}
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func shouldAbortCancelledFallback(itemID string, err error) bool {
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if errors.Is(err, ErrDownloadCancelled) {
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return true
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}
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return itemID != "" && isDownloadCancelled(itemID)
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}
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func normalizeExtensionDownloadErrorType(errorType, message string) string {
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normalized := strings.TrimSpace(errorType)
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classified := classifyDownloadErrorType(message)
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if classified != "" && classified != "unknown" {
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switch strings.ToLower(normalized) {
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case "", "unknown", "runtime_error", "api_error", "download_error", "extension_error":
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return classified
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}
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}
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return normalized
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}
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// attemptExtensionDownload runs a single provider.Download attempt: builds the
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// output path, reports progress, and on success assembles the full
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// DownloadResponse (overlay, request fallbacks, optional title/artist/composer
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// fallback, metadata embed, ISRC index). On failure it writes into
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// lastErr/lastErrType/lastRetryAfterSeconds exactly as the inline code did
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// (leaving them untouched when neither branch applies) so callers can keep
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// their own verification_required/stop-fallback handling and error messages.
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// cancelledOuter true means the caller must return (nil, ErrDownloadCancelled).
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func attemptExtensionDownload(
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req DownloadRequest,
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ext *loadedExtension,
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provider *extensionProviderWrapper,
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trackID, quality, providerLabel string,
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applyTitleFallback bool,
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lastErr *error,
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lastErrType *string,
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lastRetryAfterSeconds *int,
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) (resp *DownloadResponse, cancelledOuter bool) {
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outputPath := buildOutputPathForExtension(req, ext)
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if req.ItemID != "" {
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SetItemPreparingStage(req.ItemID, "resolving_stream")
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}
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result, err := provider.Download(trackID, quality, outputPath, req.ItemID, func(percent int) {
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if req.ItemID != "" {
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normalized := float64(percent) / 100.0
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if normalized < 0 {
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normalized = 0
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}
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if normalized > 1 {
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normalized = 1
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}
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SetItemProgress(req.ItemID, normalized, 0, 0)
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}
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})
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downloadSucceeded := err == nil && result != nil && result.Success
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if req.ItemID != "" && downloadSucceeded {
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SetItemFinalizing(req.ItemID)
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}
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if shouldAbortCancelledFallback(req.ItemID, err) {
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return nil, true
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}
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if downloadSucceeded {
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metadataStartedAt := time.Now()
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enrichRequestExtendedMetadata(&req)
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LogDebug(
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"DownloadPipeline",
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"item=%s provider=%s post-transfer metadataMs=%.1f",
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req.ItemID,
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providerLabel,
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extensionDurationMs(time.Since(metadataStartedAt)),
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)
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normalizedResult, alreadyExists := normalizeExtensionDownloadResult(result)
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message := "Downloaded from " + providerLabel
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if alreadyExists {
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message = "File already exists"
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}
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built := buildDownloadSuccessResponse(
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req,
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normalizedResult,
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providerLabel,
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message,
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normalizedResult.FilePath,
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alreadyExists,
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)
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overlayExtensionDownloadMetadata(&built, result)
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if ext.Manifest.SkipMetadataEnrichment {
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built.SkipMetadataEnrichment = true
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}
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applyExtensionRequestFallbacks(&built, req)
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|
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if applyTitleFallback {
|
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if req.TrackName != "" && built.Title == "" {
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built.Title = req.TrackName
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}
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if req.ArtistName != "" && built.Artist == "" {
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built.Artist = req.ArtistName
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}
|
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if req.Composer != "" && built.Composer == "" {
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built.Composer = req.Composer
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}
|
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}
|
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|
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embedExtensionDownloadMetadata(built, req, alreadyExists)
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|
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if !alreadyExists && !isFDOutput(req.OutputFD) && strings.TrimSpace(req.OutputDir) != "" {
|
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indexISRC := strings.TrimSpace(built.ISRC)
|
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if indexISRC == "" {
|
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indexISRC = strings.TrimSpace(req.ISRC)
|
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}
|
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if indexISRC != "" && strings.TrimSpace(built.FilePath) != "" {
|
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AddToISRCIndex(req.OutputDir, indexISRC, built.FilePath)
|
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}
|
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}
|
|
|
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if req.ItemID != "" {
|
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CompleteItemProgress(req.ItemID)
|
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}
|
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return &built, false
|
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}
|
|
|
|
if err != nil {
|
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if errors.Is(err, ErrDownloadCancelled) {
|
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return &DownloadResponse{
|
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Success: false,
|
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Error: "Download cancelled",
|
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ErrorType: "cancelled",
|
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Service: providerLabel,
|
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}, false
|
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}
|
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*lastErr = err
|
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*lastErrType = ""
|
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} else if result != nil && result.ErrorMessage != "" {
|
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*lastErr = fmt.Errorf("%s", result.ErrorMessage)
|
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*lastErrType = normalizeExtensionDownloadErrorType(result.ErrorType, result.ErrorMessage)
|
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*lastRetryAfterSeconds = result.RetryAfterSeconds
|
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} else if result == nil {
|
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*lastErr = fmt.Errorf("extension returned no download result")
|
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*lastErrType = "extension_error"
|
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}
|
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return nil, false
|
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}
|
|
|
|
// attemptVerifiedResumeBeforeMetadata gives a just-verified request one direct
|
|
// chance against its selected provider before optional metadata providers run.
|
|
// Download-provider sources keep their normal precedence because they may
|
|
// dynamically lock fallback from checkAvailability.
|
|
func attemptVerifiedResumeBeforeMetadata(
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req DownloadRequest,
|
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selectedProvider string,
|
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extManager *extensionManager,
|
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) (*DownloadResponse, bool) {
|
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selectedProvider = strings.TrimSpace(selectedProvider)
|
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if selectedProvider == "" || extManager == nil {
|
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return nil, false
|
|
}
|
|
|
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sourceProvider := strings.TrimSpace(req.Source)
|
|
if sourceProvider != "" && !strings.EqualFold(sourceProvider, selectedProvider) {
|
|
if sourceExt, err := extManager.GetExtension(sourceProvider); err == nil &&
|
|
sourceExt != nil && sourceExt.Enabled && sourceExt.Error == "" &&
|
|
sourceExt.Manifest != nil && sourceExt.Manifest.IsDownloadProvider() {
|
|
return nil, false
|
|
}
|
|
}
|
|
|
|
ext, err := extManager.GetExtension(selectedProvider)
|
|
if err != nil || ext == nil || !ext.Enabled || ext.Error != "" ||
|
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ext.Manifest == nil || !ext.Manifest.IsDownloadProvider() {
|
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return nil, false
|
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}
|
|
|
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provider := newExtensionProviderWrapper(ext)
|
|
var availability *ExtAvailabilityResult
|
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trackID := ""
|
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if strings.EqualFold(sourceProvider, selectedProvider) {
|
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trackID = resolvePreferredTrackIDForExtension(ext, req, "")
|
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} else {
|
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availability, err = provider.CheckAvailabilityForItemID(
|
|
req.ISRC,
|
|
req.TrackName,
|
|
req.ArtistName,
|
|
req.SpotifyID,
|
|
req.DeezerID,
|
|
req.TidalID,
|
|
req.QobuzID,
|
|
req.DurationMS,
|
|
req.ItemID,
|
|
)
|
|
if shouldAbortCancelledFallback(req.ItemID, err) {
|
|
return nil, true
|
|
}
|
|
if err != nil {
|
|
if strings.EqualFold(classifyDownloadErrorType(err.Error()), "verification_required") {
|
|
return &DownloadResponse{
|
|
Success: false,
|
|
Error: "Download failed: " + err.Error(),
|
|
ErrorType: "verification_required",
|
|
Service: selectedProvider,
|
|
}, false
|
|
}
|
|
return nil, false
|
|
}
|
|
if availability == nil || !availability.Available {
|
|
if shouldStopProviderFallback(availability) {
|
|
return buildExtensionFallbackStoppedResponse(selectedProvider, availability, nil), false
|
|
}
|
|
return nil, false
|
|
}
|
|
trackID = resolvePreferredTrackIDForExtension(ext, req, availability.TrackID)
|
|
}
|
|
|
|
var lastErr error
|
|
var lastErrType string
|
|
var lastRetryAfterSeconds int
|
|
resp, cancelled := attemptExtensionDownload(
|
|
req,
|
|
ext,
|
|
provider,
|
|
trackID,
|
|
req.Quality,
|
|
selectedProvider,
|
|
strings.EqualFold(sourceProvider, selectedProvider),
|
|
&lastErr,
|
|
&lastErrType,
|
|
&lastRetryAfterSeconds,
|
|
)
|
|
if cancelled || resp != nil {
|
|
return resp, cancelled
|
|
}
|
|
|
|
errorType := lastErrType
|
|
if errorType == "" && lastErr != nil {
|
|
errorType = classifyDownloadErrorType(lastErr.Error())
|
|
}
|
|
if strings.EqualFold(errorType, "verification_required") {
|
|
errorMessage := "Verification required"
|
|
if lastErr != nil {
|
|
errorMessage = "Download failed: " + lastErr.Error()
|
|
}
|
|
return &DownloadResponse{
|
|
Success: false,
|
|
Error: errorMessage,
|
|
ErrorType: "verification_required",
|
|
RetryAfterSeconds: lastRetryAfterSeconds,
|
|
Service: selectedProvider,
|
|
}, false
|
|
}
|
|
// A failed fast attempt may still succeed after source enrichment resolves a
|
|
// better provider-native ID. The normal path below retains strict/stop-
|
|
// fallback semantics for that prepared retry.
|
|
return nil, false
|
|
}
|
|
|
|
func DownloadWithExtensionFallback(req DownloadRequest) (*DownloadResponse, error) {
|
|
pipelineStartedAt := time.Now()
|
|
defer func() {
|
|
LogDebug(
|
|
"DownloadPipeline",
|
|
"item=%s service=%s totalMs=%.1f",
|
|
req.ItemID,
|
|
req.Service,
|
|
extensionDurationMs(time.Since(pipelineStartedAt)),
|
|
)
|
|
}()
|
|
preparationKey := downloadPreparationKey(req)
|
|
metadataPrepared := false
|
|
resumedAfterVerification := false
|
|
if prepared, preparedMetadata, ok := takePreparedDownloadRequest(preparationKey, req); ok {
|
|
req = prepared
|
|
metadataPrepared = preparedMetadata
|
|
resumedAfterVerification = true
|
|
GoLog("[DownloadWithExtensionFallback] Resuming item %s after verification (metadata prepared: %v)\n", req.ItemID, metadataPrepared)
|
|
}
|
|
if req.ItemID != "" {
|
|
StartItemProgress(req.ItemID)
|
|
SetItemPreparingStage(req.ItemID, "resolving_metadata")
|
|
}
|
|
|
|
priority := GetProviderPriority()
|
|
extManager := getExtensionManager()
|
|
strictMode := !req.UseFallback
|
|
selectedProvider := strings.TrimSpace(req.Service)
|
|
|
|
if isDownloadCancelled(req.ItemID) {
|
|
return nil, ErrDownloadCancelled
|
|
}
|
|
|
|
if strictMode {
|
|
if selectedProvider == "" {
|
|
selectedProvider = strings.TrimSpace(req.Source)
|
|
}
|
|
if selectedProvider != "" {
|
|
priority = []string{selectedProvider}
|
|
GoLog("[DownloadWithExtensionFallback] Strict mode enabled, provider locked to: %s\n", selectedProvider)
|
|
}
|
|
}
|
|
|
|
if !strictMode && req.Service != "" {
|
|
found := false
|
|
for _, p := range priority {
|
|
if strings.EqualFold(p, req.Service) {
|
|
found = true
|
|
break
|
|
}
|
|
}
|
|
newPriority := []string{req.Service}
|
|
for _, p := range priority {
|
|
if !strings.EqualFold(p, req.Service) {
|
|
newPriority = append(newPriority, p)
|
|
}
|
|
}
|
|
priority = newPriority
|
|
if !found {
|
|
GoLog("[DownloadWithExtensionFallback] Extension service '%s' added to priority front\n", req.Service)
|
|
} else {
|
|
GoLog("[DownloadWithExtensionFallback] Extension service '%s' moved to priority front\n", req.Service)
|
|
}
|
|
GoLog("[DownloadWithExtensionFallback] New priority order: %v\n", priority)
|
|
}
|
|
|
|
var lastErr error
|
|
var lastErrType string
|
|
var lastRetryAfterSeconds int
|
|
var stopProviderFallback bool
|
|
var sourceExtensionLocked bool
|
|
var sourceExtensionAvailability *ExtAvailabilityResult
|
|
var sourceExtensionTrackID string
|
|
|
|
if resumedAfterVerification && !metadataPrepared {
|
|
GoLog("[DownloadWithExtensionFallback] Trying verified provider %s before optional metadata enrichment\n", selectedProvider)
|
|
resp, cancelled := attemptVerifiedResumeBeforeMetadata(req, selectedProvider, extManager)
|
|
if cancelled {
|
|
return nil, ErrDownloadCancelled
|
|
}
|
|
if resp != nil {
|
|
return resp, nil
|
|
}
|
|
if req.ItemID != "" {
|
|
SetItemPreparingStage(req.ItemID, "resolving_metadata")
|
|
}
|
|
}
|
|
|
|
if req.Source != "" && selectedProvider != req.Source {
|
|
ext, err := extManager.GetExtension(req.Source)
|
|
if err == nil && ext.Enabled && ext.Error == "" && ext.Manifest.IsDownloadProvider() {
|
|
provider := newExtensionProviderWrapper(ext)
|
|
availability, availErr := provider.CheckAvailabilityForItemID(req.ISRC, req.TrackName, req.ArtistName, req.SpotifyID, req.DeezerID, req.TidalID, req.QobuzID, req.DurationMS, req.ItemID)
|
|
if shouldAbortCancelledFallback(req.ItemID, availErr) {
|
|
return nil, ErrDownloadCancelled
|
|
}
|
|
if availErr != nil {
|
|
GoLog("[DownloadWithExtensionFallback] Source extension %s preflight failed (non-fatal): %v\n", req.Source, availErr)
|
|
} else if shouldStopProviderFallback(availability) {
|
|
sourceExtensionLocked = true
|
|
sourceExtensionAvailability = availability
|
|
sourceExtensionTrackID = strings.TrimSpace(availability.TrackID)
|
|
selectedProvider = req.Source
|
|
GoLog("[DownloadWithExtensionFallback] Source extension %s requested skip_fallback (available=%v), locking download to source extension\n", req.Source, availability.Available)
|
|
}
|
|
}
|
|
}
|
|
|
|
if !metadataPrepared {
|
|
if req.Source != "" {
|
|
ext, err := extManager.GetExtension(req.Source)
|
|
if err == nil && ext.Enabled && ext.Error == "" && ext.Manifest.IsMetadataProvider() {
|
|
GoLog("[DownloadWithExtensionFallback] Enriching track from extension '%s'...\n", req.Source)
|
|
|
|
provider := newExtensionProviderWrapper(ext)
|
|
trackMeta := &ExtTrackMetadata{
|
|
ID: req.SpotifyID,
|
|
Name: req.TrackName,
|
|
Artists: req.ArtistName,
|
|
AlbumName: req.AlbumName,
|
|
DurationMS: req.DurationMS,
|
|
ISRC: req.ISRC,
|
|
ReleaseDate: req.ReleaseDate,
|
|
TrackNumber: req.TrackNumber,
|
|
TotalTracks: req.TotalTracks,
|
|
DiscNumber: req.DiscNumber,
|
|
TotalDiscs: req.TotalDiscs,
|
|
ProviderID: req.Source,
|
|
Composer: req.Composer,
|
|
}
|
|
|
|
enrichedTrack, err := provider.EnrichTrackForItemID(trackMeta, req.ItemID)
|
|
if shouldAbortCancelledFallback(req.ItemID, err) {
|
|
return nil, ErrDownloadCancelled
|
|
}
|
|
if err == nil && enrichedTrack != nil {
|
|
if enrichedTrack.ISRC != "" && enrichedTrack.ISRC != req.ISRC {
|
|
GoLog("[DownloadWithExtensionFallback] ISRC enriched: %s -> %s\n", req.ISRC, enrichedTrack.ISRC)
|
|
req.ISRC = enrichedTrack.ISRC
|
|
}
|
|
if enrichedTrack.TidalID != "" {
|
|
GoLog("[DownloadWithExtensionFallback] Tidal ID from Odesli: %s\n", enrichedTrack.TidalID)
|
|
req.TidalID = enrichedTrack.TidalID
|
|
}
|
|
if enrichedTrack.QobuzID != "" {
|
|
GoLog("[DownloadWithExtensionFallback] Qobuz ID from Odesli: %s\n", enrichedTrack.QobuzID)
|
|
req.QobuzID = enrichedTrack.QobuzID
|
|
}
|
|
if enrichedTrack.DeezerID != "" {
|
|
GoLog("[DownloadWithExtensionFallback] Deezer ID from Odesli: %s\n", enrichedTrack.DeezerID)
|
|
req.DeezerID = enrichedTrack.DeezerID
|
|
}
|
|
if enrichedTrack.Name != "" {
|
|
req.TrackName = enrichedTrack.Name
|
|
}
|
|
if enrichedTrack.Artists != "" {
|
|
req.ArtistName = enrichedTrack.Artists
|
|
}
|
|
overlayStr(&req.AlbumName, enrichedTrack.AlbumName, "AlbumName")
|
|
overlayStr(&req.AlbumArtist, enrichedTrack.AlbumArtist, "")
|
|
overlayInt(&req.DurationMS, enrichedTrack.DurationMS, "DurationMS")
|
|
overlayStr(&req.CoverURL, enrichedTrack.CoverURL, "")
|
|
overlayStr(&req.SpotifyID, enrichedTrack.ID, "Track ID")
|
|
overlayStr(&req.Label, enrichedTrack.Label, "Label")
|
|
overlayStr(&req.Copyright, enrichedTrack.Copyright, "Copyright")
|
|
overlayStr(&req.Genre, enrichedTrack.Genre, "Genre")
|
|
overlayStr(&req.ReleaseDate, enrichedTrack.ReleaseDate, "ReleaseDate")
|
|
overlayInt(&req.TrackNumber, enrichedTrack.TrackNumber, "TrackNumber")
|
|
overlayInt(&req.TotalTracks, enrichedTrack.TotalTracks, "TotalTracks")
|
|
overlayInt(&req.DiscNumber, enrichedTrack.DiscNumber, "DiscNumber")
|
|
overlayInt(&req.TotalDiscs, enrichedTrack.TotalDiscs, "TotalDiscs")
|
|
overlayStr(&req.Composer, enrichedTrack.Composer, "Composer")
|
|
}
|
|
}
|
|
}
|
|
|
|
if req.Source != "" &&
|
|
req.TrackName != "" && req.ArtistName != "" &&
|
|
(req.AlbumName == "" || req.ReleaseDate == "" || req.ISRC == "") {
|
|
|
|
searchQuery := req.TrackName + " " + req.ArtistName
|
|
GoLog("[DownloadWithExtensionFallback] Metadata incomplete, searching providers for: %s\n", searchQuery)
|
|
|
|
// Only the first match is consumed below. Asking for five made the manager
|
|
// continue through additional providers even after it already had a usable
|
|
// match, multiplying the per-provider timeout on slow networks.
|
|
tracks, searchErr := extManager.SearchTracksWithMetadataProvidersForItemID(searchQuery, 1, true, req.ItemID)
|
|
if shouldAbortCancelledFallback(req.ItemID, searchErr) {
|
|
return nil, ErrDownloadCancelled
|
|
}
|
|
if searchErr == nil && len(tracks) > 0 {
|
|
track := tracks[0]
|
|
GoLog("[DownloadWithExtensionFallback] Metadata match (%s): %s - %s (album: %s, date: %s, isrc: %s)\n",
|
|
track.ProviderID, track.Name, track.Artists, track.AlbumName, track.ReleaseDate, track.ISRC)
|
|
|
|
overlayStr(&req.AlbumName, track.AlbumName, "")
|
|
overlayStr(&req.AlbumArtist, track.AlbumArtist, "")
|
|
overlayStr(&req.ReleaseDate, track.ReleaseDate, "")
|
|
overlayStr(&req.ISRC, track.ISRC, "")
|
|
overlayInt(&req.TrackNumber, track.TrackNumber, "")
|
|
overlayInt(&req.TotalTracks, track.TotalTracks, "")
|
|
overlayInt(&req.DiscNumber, track.DiscNumber, "")
|
|
overlayInt(&req.TotalDiscs, track.TotalDiscs, "")
|
|
overlayStr(&req.Composer, track.Composer, "")
|
|
overlayStr(&req.CoverURL, track.CoverURL, "")
|
|
overlayStr(&req.Genre, track.Genre, "")
|
|
overlayStr(&req.Label, track.Label, "")
|
|
overlayStr(&req.Copyright, track.Copyright, "")
|
|
} else if searchErr != nil {
|
|
GoLog("[DownloadWithExtensionFallback] Metadata provider search failed (non-fatal): %v\n", searchErr)
|
|
}
|
|
|
|
}
|
|
}
|
|
if req.Source != "" && selectedProvider == req.Source {
|
|
if isDownloadCancelled(req.ItemID) {
|
|
return nil, ErrDownloadCancelled
|
|
}
|
|
|
|
if sourceExtensionLocked && (sourceExtensionAvailability == nil || !sourceExtensionAvailability.Available) {
|
|
GoLog("[DownloadWithExtensionFallback] Source extension %s stopped fallback before download (reason: %s)\n", req.Source, resolveExtensionAvailabilityReason(sourceExtensionAvailability, nil))
|
|
return buildExtensionFallbackStoppedResponse(req.Source, sourceExtensionAvailability, nil), nil
|
|
}
|
|
|
|
GoLog("[DownloadWithExtensionFallback] Track source is extension '%s' matching selected provider, trying it first\n", req.Source)
|
|
|
|
ext, err := extManager.GetExtension(req.Source)
|
|
if err == nil && ext.Enabled && ext.Error == "" && ext.Manifest.IsDownloadProvider() {
|
|
stopProviderFallback = ext.Manifest.StopsProviderFallback()
|
|
|
|
provider := newExtensionProviderWrapper(ext)
|
|
|
|
trackID := resolvePreferredTrackIDForExtension(ext, req, sourceExtensionTrackID)
|
|
|
|
GoLog("[DownloadWithExtensionFallback] Downloading from source extension with trackID: %s (stopProviderFallback: %v)\n", trackID, stopProviderFallback)
|
|
|
|
resp, cancelledOuter := attemptExtensionDownload(req, ext, provider, trackID, req.Quality, req.Source, true, &lastErr, &lastErrType, &lastRetryAfterSeconds)
|
|
if cancelledOuter {
|
|
return nil, ErrDownloadCancelled
|
|
}
|
|
if resp != nil {
|
|
return resp, nil
|
|
}
|
|
GoLog("[DownloadWithExtensionFallback] Source extension %s failed: %v\n", req.Source, lastErr)
|
|
|
|
sourceErrType := lastErrType
|
|
if sourceErrType == "" && lastErr != nil {
|
|
sourceErrType = classifyDownloadErrorType(lastErr.Error())
|
|
}
|
|
if strings.EqualFold(sourceErrType, "verification_required") {
|
|
GoLog("[DownloadWithExtensionFallback] Source extension %s requires verification, not trying other providers\n", req.Source)
|
|
cachePreparedDownloadRequest(preparationKey, req)
|
|
return &DownloadResponse{
|
|
Success: false,
|
|
Error: "Download failed: " + lastErr.Error(),
|
|
ErrorType: "verification_required",
|
|
Service: req.Source,
|
|
}, nil
|
|
}
|
|
|
|
if stopProviderFallback || sourceExtensionLocked {
|
|
if sourceExtensionLocked {
|
|
GoLog("[DownloadWithExtensionFallback] Source extension %s requested skip_fallback, not trying other providers\n", req.Source)
|
|
return buildExtensionFallbackStoppedResponse(req.Source, sourceExtensionAvailability, lastErr), nil
|
|
}
|
|
GoLog("[DownloadWithExtensionFallback] stopProviderFallback is true, not trying other providers\n")
|
|
return &DownloadResponse{
|
|
Success: false,
|
|
Error: "Download failed: " + lastErr.Error(),
|
|
ErrorType: firstNonEmptyString(lastErrType, "extension_error"),
|
|
RetryAfterSeconds: lastRetryAfterSeconds,
|
|
Service: req.Source,
|
|
}, nil
|
|
}
|
|
} else {
|
|
GoLog("[DownloadWithExtensionFallback] Source extension %s not available or not a download provider\n", req.Source)
|
|
}
|
|
}
|
|
|
|
priority = prioritizeFallbackProvidersByHealth(priority, extManager, req.Source)
|
|
|
|
for _, providerID := range priority {
|
|
if isDownloadCancelled(req.ItemID) {
|
|
return nil, ErrDownloadCancelled
|
|
}
|
|
|
|
providerID = strings.TrimSpace(providerID)
|
|
if providerID == "" {
|
|
continue
|
|
}
|
|
// Skip the origin extension only when it differs from the explicitly
|
|
// selected provider; otherwise it must still be attempted here.
|
|
if providerID == req.Source && req.Source != selectedProvider {
|
|
continue
|
|
}
|
|
|
|
if providerID != selectedProvider && !isExtensionFallbackAllowed(providerID) {
|
|
GoLog("[DownloadWithExtensionFallback] Skipping extension provider %s (not enabled for fallback)\n", providerID)
|
|
continue
|
|
}
|
|
|
|
GoLog("[DownloadWithExtensionFallback] Trying provider: %s\n", providerID)
|
|
|
|
{
|
|
ext, err := extManager.GetExtension(providerID)
|
|
if err != nil || !ext.Enabled || ext.Error != "" {
|
|
GoLog("[DownloadWithExtensionFallback] Extension %s not available\n", providerID)
|
|
continue
|
|
}
|
|
|
|
if !ext.Manifest.IsDownloadProvider() {
|
|
continue
|
|
}
|
|
|
|
provider := newExtensionProviderWrapper(ext)
|
|
|
|
availability, err := provider.CheckAvailabilityForItemID(req.ISRC, req.TrackName, req.ArtistName, req.SpotifyID, req.DeezerID, req.TidalID, req.QobuzID, req.DurationMS, req.ItemID)
|
|
if shouldAbortCancelledFallback(req.ItemID, err) {
|
|
return nil, ErrDownloadCancelled
|
|
}
|
|
terminalAvailability := shouldStopProviderFallback(availability)
|
|
if err != nil || !availability.Available {
|
|
GoLog("[DownloadWithExtensionFallback] %s: not available\n", providerID)
|
|
if err != nil {
|
|
lastErr = err
|
|
if strings.EqualFold(classifyDownloadErrorType(err.Error()), "verification_required") {
|
|
GoLog("[DownloadWithExtensionFallback] %s requires verification (availability); pausing fallback to open the challenge\n", providerID)
|
|
cachePreparedDownloadRequest(preparationKey, req)
|
|
return &DownloadResponse{
|
|
Success: false,
|
|
Error: "Download failed: " + err.Error(),
|
|
ErrorType: "verification_required",
|
|
Service: providerID,
|
|
}, nil
|
|
}
|
|
}
|
|
if terminalAvailability {
|
|
GoLog("[DownloadWithExtensionFallback] %s requested skip_fallback after availability check\n", providerID)
|
|
return buildExtensionFallbackStoppedResponse(providerID, availability, err), nil
|
|
}
|
|
continue
|
|
}
|
|
|
|
req.OutputExt = ""
|
|
|
|
// Honor the requested quality when this provider recognizes it
|
|
// (e.g. an explicit user selection). Only when the token is not
|
|
// one of this provider's own options do we fall back to its
|
|
// highest quality, since a source provider's token may not map.
|
|
fallbackQuality := req.Quality
|
|
if len(ext.Manifest.QualityOptions) > 0 {
|
|
requested := strings.TrimSpace(req.Quality)
|
|
recognized := false
|
|
if requested != "" {
|
|
for _, opt := range ext.Manifest.QualityOptions {
|
|
if strings.EqualFold(strings.TrimSpace(opt.ID), requested) {
|
|
recognized = true
|
|
break
|
|
}
|
|
}
|
|
}
|
|
if !recognized {
|
|
if best := strings.TrimSpace(ext.Manifest.QualityOptions[0].ID); best != "" {
|
|
fallbackQuality = best
|
|
}
|
|
}
|
|
}
|
|
|
|
resp, cancelledOuter := attemptExtensionDownload(req, ext, provider, availability.TrackID, fallbackQuality, providerID, false, &lastErr, &lastErrType, &lastRetryAfterSeconds)
|
|
if cancelledOuter {
|
|
return nil, ErrDownloadCancelled
|
|
}
|
|
if resp != nil {
|
|
return resp, nil
|
|
}
|
|
GoLog("[DownloadWithExtensionFallback] %s failed: %v\n", providerID, lastErr)
|
|
|
|
if lastErr != nil {
|
|
effType := lastErrType
|
|
if effType == "" {
|
|
effType = classifyDownloadErrorType(lastErr.Error())
|
|
}
|
|
if strings.EqualFold(effType, "verification_required") {
|
|
GoLog("[DownloadWithExtensionFallback] %s requires verification; pausing fallback to open the challenge\n", providerID)
|
|
cachePreparedDownloadRequest(preparationKey, req)
|
|
return &DownloadResponse{
|
|
Success: false,
|
|
Error: "Download failed: " + lastErr.Error(),
|
|
ErrorType: "verification_required",
|
|
RetryAfterSeconds: lastRetryAfterSeconds,
|
|
Service: providerID,
|
|
}, nil
|
|
}
|
|
}
|
|
|
|
if terminalAvailability {
|
|
GoLog("[DownloadWithExtensionFallback] %s requested skip_fallback after download failure\n", providerID)
|
|
return buildExtensionFallbackStoppedResponse(providerID, availability, lastErr), nil
|
|
}
|
|
}
|
|
}
|
|
|
|
if lastErr != nil {
|
|
errorType := firstNonEmptyString(lastErrType, classifyDownloadErrorType(lastErr.Error()))
|
|
if errorType == "unknown" {
|
|
errorType = "not_found"
|
|
}
|
|
return &DownloadResponse{
|
|
Success: false,
|
|
Error: "All providers failed. Last error: " + lastErr.Error(),
|
|
ErrorType: errorType,
|
|
RetryAfterSeconds: lastRetryAfterSeconds,
|
|
}, nil
|
|
}
|
|
|
|
return &DownloadResponse{
|
|
Success: false,
|
|
Error: "No extension download providers available",
|
|
ErrorType: "not_found",
|
|
}, nil
|
|
}
|
|
|
|
// buildDownloadFilename renders the sanitized "<name><ext>" filename for req
|
|
// from its template/metadata, defaulting to "<artist> - <title>.flac".
|
|
func buildDownloadFilename(req DownloadRequest) string {
|
|
metadata := map[string]any{
|
|
"title": req.TrackName,
|
|
"artist": req.ArtistName,
|
|
"album": req.AlbumName,
|
|
"album_artist": req.AlbumArtist,
|
|
"track": req.TrackNumber,
|
|
"track_number": req.TrackNumber,
|
|
"total_tracks": req.TotalTracks,
|
|
"playlist_position": req.PlaylistPosition,
|
|
"disc": req.DiscNumber,
|
|
"disc_number": req.DiscNumber,
|
|
"total_discs": req.TotalDiscs,
|
|
"year": extractYear(req.ReleaseDate),
|
|
"date": req.ReleaseDate,
|
|
"release_date": req.ReleaseDate,
|
|
"isrc": req.ISRC,
|
|
"composer": req.Composer,
|
|
"quality": req.Quality,
|
|
"quality_variant": req.QualityVariant,
|
|
}
|
|
|
|
filename := buildFilenameFromTemplate(req.FilenameFormat, metadata)
|
|
if strings.TrimSpace(filename) == "" {
|
|
filename = fmt.Sprintf("%s - %s", req.ArtistName, req.TrackName)
|
|
}
|
|
filename = sanitizeFilenamePreservingToken(filename, req.QualityVariant)
|
|
|
|
ext := strings.TrimSpace(req.OutputExt)
|
|
if ext == "" {
|
|
ext = ".flac"
|
|
} else if !strings.HasPrefix(ext, ".") {
|
|
ext = "." + ext
|
|
}
|
|
|
|
return filename + ext
|
|
}
|
|
|
|
func buildOutputPath(req DownloadRequest) string {
|
|
if strings.TrimSpace(req.OutputPath) != "" {
|
|
return strings.TrimSpace(req.OutputPath)
|
|
}
|
|
|
|
outputDir := req.OutputDir
|
|
if strings.TrimSpace(outputDir) == "" {
|
|
outputDir = filepath.Join(os.TempDir(), "spotiflac-downloads")
|
|
}
|
|
os.MkdirAll(outputDir, 0755)
|
|
AddAllowedDownloadDir(outputDir)
|
|
|
|
return filepath.Join(outputDir, buildDownloadFilename(req))
|
|
}
|
|
|
|
func buildOutputPathForExtension(req DownloadRequest, ext *loadedExtension) string {
|
|
if strings.TrimSpace(req.OutputPath) != "" {
|
|
outputPath := strings.TrimSpace(req.OutputPath)
|
|
AddAllowedDownloadDir(filepath.Dir(outputPath))
|
|
return outputPath
|
|
}
|
|
|
|
// SAF downloads hand extensions a detached output FD owned by the host.
|
|
// Extensions still need a real local temp file so Android can copy it into
|
|
// the target document after provider-specific post-processing completes.
|
|
if !isFDOutput(req.OutputFD) && strings.TrimSpace(req.OutputDir) != "" {
|
|
return buildOutputPath(req)
|
|
}
|
|
|
|
tempDir := filepath.Join(ext.DataDir, "downloads")
|
|
os.MkdirAll(tempDir, 0755)
|
|
AddAllowedDownloadDir(tempDir)
|
|
|
|
return filepath.Join(tempDir, buildDownloadFilename(req))
|
|
}
|
|
|
|
func canEmbedGenreLabel(filePath string) bool {
|
|
path := strings.TrimSpace(filePath)
|
|
if path == "" || strings.HasPrefix(path, "content://") || strings.HasPrefix(path, "/proc/self/fd/") {
|
|
return false
|
|
}
|
|
if strings.ToLower(filepath.Ext(path)) != ".flac" {
|
|
return false
|
|
}
|
|
if !filepath.IsAbs(path) {
|
|
return false
|
|
}
|
|
info, err := os.Stat(path)
|
|
return err == nil && !info.IsDir() && info.Size() > 0
|
|
}
|
|
|
|
func embedExtensionDownloadMetadata(resp DownloadResponse, req DownloadRequest, alreadyExists bool) {
|
|
if alreadyExists || !req.EmbedMetadata {
|
|
return
|
|
}
|
|
|
|
filePath := strings.TrimSpace(resp.FilePath)
|
|
if !canEmbedGenreLabel(filePath) {
|
|
if req.Genre != "" || req.Label != "" || resp.CoverURL != "" || req.CoverURL != "" {
|
|
GoLog("[DownloadWithExtensionFallback] Skipping metadata/cover embed for non-local FLAC output path: %q\n", filePath)
|
|
}
|
|
return
|
|
}
|
|
|
|
coverURL := firstNonEmptyTrimmed(resp.CoverURL, req.CoverURL)
|
|
var coverData []byte
|
|
if coverURL != "" {
|
|
data, err := downloadCoverToMemory(coverURL, req.EmbedMaxQualityCover)
|
|
if err != nil {
|
|
GoLog("[DownloadWithExtensionFallback] Warning: failed to download cover for metadata embed: %v\n", err)
|
|
} else if len(data) > 0 {
|
|
coverData = data
|
|
}
|
|
}
|
|
|
|
metadata := Metadata{
|
|
Title: firstNonEmptyTrimmed(resp.Title, req.TrackName),
|
|
Artist: firstNonEmptyTrimmed(resp.Artist, req.ArtistName),
|
|
Album: firstNonEmptyTrimmed(resp.Album, req.AlbumName),
|
|
AlbumArtist: firstNonEmptyTrimmed(resp.AlbumArtist, req.AlbumArtist),
|
|
ArtistTagMode: req.ArtistTagMode,
|
|
Date: firstNonEmptyTrimmed(resp.ReleaseDate, req.ReleaseDate),
|
|
TrackNumber: firstPositiveInt(resp.TrackNumber, req.TrackNumber),
|
|
TotalTracks: firstPositiveInt(resp.TotalTracks, req.TotalTracks),
|
|
DiscNumber: firstPositiveInt(resp.DiscNumber, req.DiscNumber),
|
|
TotalDiscs: firstPositiveInt(resp.TotalDiscs, req.TotalDiscs),
|
|
ISRC: firstNonEmptyTrimmed(resp.ISRC, req.ISRC),
|
|
Genre: firstNonEmptyTrimmed(resp.Genre, req.Genre),
|
|
Label: firstNonEmptyTrimmed(resp.Label, req.Label),
|
|
Copyright: firstNonEmptyTrimmed(resp.Copyright, req.Copyright),
|
|
Composer: firstNonEmptyTrimmed(resp.Composer, req.Composer),
|
|
}
|
|
if req.EmbedLyrics {
|
|
metadata.Lyrics = resp.LyricsLRC
|
|
}
|
|
|
|
var err error
|
|
if len(coverData) > 0 {
|
|
err = EmbedMetadataWithCoverData(filePath, metadata, coverData)
|
|
} else {
|
|
err = EmbedMetadata(filePath, metadata, "")
|
|
}
|
|
if err != nil {
|
|
GoLog("[DownloadWithExtensionFallback] Warning: failed to embed metadata/cover: %v\n", err)
|
|
return
|
|
}
|
|
|
|
if len(coverData) > 0 {
|
|
GoLog("[DownloadWithExtensionFallback] Embedded metadata and cover from %q\n", coverURL)
|
|
} else {
|
|
GoLog("[DownloadWithExtensionFallback] Embedded metadata without cover\n")
|
|
}
|
|
}
|
|
|
|
func firstPositiveInt(values ...int) int {
|
|
for _, value := range values {
|
|
if value > 0 {
|
|
return value
|
|
}
|
|
}
|
|
return 0
|
|
}
|