mirror of
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synced 2024-11-23 08:54:10 +01:00
e43b5ce5e5
This is possible now that we no longer support go1.12 and brings rclone into line with standard practices in the Go world. This also removes errors.New and errors.Errorf from lib/errors and prefers the stdlib errors package over lib/errors.
377 lines
10 KiB
Go
377 lines
10 KiB
Go
// Store the parsing of file patterns
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package googlephotos
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import (
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"context"
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"fmt"
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"path"
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"regexp"
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"strconv"
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"strings"
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"time"
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"github.com/rclone/rclone/backend/googlephotos/api"
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"github.com/rclone/rclone/fs"
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)
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// lister describes the subset of the interfaces on Fs needed for the
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// file pattern parsing
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type lister interface {
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listDir(ctx context.Context, prefix string, filter api.SearchFilter) (entries fs.DirEntries, err error)
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listAlbums(ctx context.Context, shared bool) (all *albums, err error)
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listUploads(ctx context.Context, dir string) (entries fs.DirEntries, err error)
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dirTime() time.Time
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startYear() int
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includeArchived() bool
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}
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// dirPattern describes a single directory pattern
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type dirPattern struct {
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re string // match for the path
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match *regexp.Regexp // compiled match
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canUpload bool // true if can upload here
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canMkdir bool // true if can make a directory here
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isFile bool // true if this is a file
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isUpload bool // true if this is the upload directory
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// function to turn a match into DirEntries
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toEntries func(ctx context.Context, f lister, prefix string, match []string) (fs.DirEntries, error)
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}
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// dirPatters is a slice of all the directory patterns
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type dirPatterns []dirPattern
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// patterns describes the layout of the google photos backend file system.
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//
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// NB no trailing / on paths
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var patterns = dirPatterns{
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{
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re: `^$`,
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toEntries: func(ctx context.Context, f lister, prefix string, match []string) (fs.DirEntries, error) {
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return fs.DirEntries{
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fs.NewDir(prefix+"media", f.dirTime()),
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fs.NewDir(prefix+"album", f.dirTime()),
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fs.NewDir(prefix+"shared-album", f.dirTime()),
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fs.NewDir(prefix+"upload", f.dirTime()),
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fs.NewDir(prefix+"feature", f.dirTime()),
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}, nil
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},
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},
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{
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re: `^upload(?:/(.*))?$`,
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toEntries: func(ctx context.Context, f lister, prefix string, match []string) (fs.DirEntries, error) {
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return f.listUploads(ctx, match[0])
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},
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canUpload: true,
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canMkdir: true,
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isUpload: true,
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},
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{
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re: `^upload/(.*)$`,
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isFile: true,
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canUpload: true,
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isUpload: true,
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},
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{
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re: `^media$`,
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toEntries: func(ctx context.Context, f lister, prefix string, match []string) (fs.DirEntries, error) {
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return fs.DirEntries{
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fs.NewDir(prefix+"all", f.dirTime()),
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fs.NewDir(prefix+"by-year", f.dirTime()),
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fs.NewDir(prefix+"by-month", f.dirTime()),
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fs.NewDir(prefix+"by-day", f.dirTime()),
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}, nil
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},
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},
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{
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re: `^media/all$`,
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toEntries: func(ctx context.Context, f lister, prefix string, match []string) (fs.DirEntries, error) {
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return f.listDir(ctx, prefix, api.SearchFilter{})
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},
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},
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{
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re: `^media/all/([^/]+)$`,
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isFile: true,
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},
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{
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re: `^media/by-year$`,
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toEntries: years,
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},
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{
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re: `^media/by-year/(\d{4})$`,
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toEntries: func(ctx context.Context, f lister, prefix string, match []string) (fs.DirEntries, error) {
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filter, err := yearMonthDayFilter(ctx, f, match)
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if err != nil {
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return nil, err
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}
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return f.listDir(ctx, prefix, filter)
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},
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},
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{
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re: `^media/by-year/(\d{4})/([^/]+)$`,
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isFile: true,
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},
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{
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re: `^media/by-month$`,
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toEntries: years,
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},
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{
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re: `^media/by-month/(\d{4})$`,
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toEntries: months,
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},
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{
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re: `^media/by-month/\d{4}/(\d{4})-(\d{2})$`,
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toEntries: func(ctx context.Context, f lister, prefix string, match []string) (fs.DirEntries, error) {
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filter, err := yearMonthDayFilter(ctx, f, match)
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if err != nil {
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return nil, err
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}
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return f.listDir(ctx, prefix, filter)
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},
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},
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{
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re: `^media/by-month/\d{4}/(\d{4})-(\d{2})/([^/]+)$`,
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isFile: true,
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},
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{
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re: `^media/by-day$`,
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toEntries: years,
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},
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{
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re: `^media/by-day/(\d{4})$`,
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toEntries: days,
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},
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{
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re: `^media/by-day/\d{4}/(\d{4})-(\d{2})-(\d{2})$`,
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toEntries: func(ctx context.Context, f lister, prefix string, match []string) (fs.DirEntries, error) {
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filter, err := yearMonthDayFilter(ctx, f, match)
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if err != nil {
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return nil, err
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}
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return f.listDir(ctx, prefix, filter)
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},
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},
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{
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re: `^media/by-day/\d{4}/(\d{4})-(\d{2})-(\d{2})/([^/]+)$`,
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isFile: true,
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},
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{
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re: `^album$`,
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toEntries: func(ctx context.Context, f lister, prefix string, match []string) (entries fs.DirEntries, err error) {
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return albumsToEntries(ctx, f, false, prefix, "")
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},
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},
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{
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re: `^album/(.+)$`,
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canMkdir: true,
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toEntries: func(ctx context.Context, f lister, prefix string, match []string) (entries fs.DirEntries, err error) {
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return albumsToEntries(ctx, f, false, prefix, match[1])
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},
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},
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{
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re: `^album/(.+?)/([^/]+)$`,
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canUpload: true,
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isFile: true,
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},
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{
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re: `^shared-album$`,
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toEntries: func(ctx context.Context, f lister, prefix string, match []string) (entries fs.DirEntries, err error) {
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return albumsToEntries(ctx, f, true, prefix, "")
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},
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},
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{
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re: `^shared-album/(.+)$`,
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toEntries: func(ctx context.Context, f lister, prefix string, match []string) (entries fs.DirEntries, err error) {
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return albumsToEntries(ctx, f, true, prefix, match[1])
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},
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},
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{
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re: `^shared-album/(.+?)/([^/]+)$`,
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isFile: true,
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},
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{
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re: `^feature$`,
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toEntries: func(ctx context.Context, f lister, prefix string, match []string) (entries fs.DirEntries, err error) {
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return fs.DirEntries{
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fs.NewDir(prefix+"favorites", f.dirTime()),
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}, nil
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},
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},
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{
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re: `^feature/favorites$`,
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toEntries: func(ctx context.Context, f lister, prefix string, match []string) (entries fs.DirEntries, err error) {
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filter := featureFilter(ctx, f, match)
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if err != nil {
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return nil, err
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}
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return f.listDir(ctx, prefix, filter)
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},
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},
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{
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re: `^feature/favorites/([^/]+)$`,
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isFile: true,
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},
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}.mustCompile()
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// mustCompile compiles the regexps in the dirPatterns
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func (ds dirPatterns) mustCompile() dirPatterns {
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for i := range ds {
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pattern := &ds[i]
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pattern.match = regexp.MustCompile(pattern.re)
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}
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return ds
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}
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// match finds the path passed in the matching structure and
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// returns the parameters and a pointer to the match, or nil.
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func (ds dirPatterns) match(root string, itemPath string, isFile bool) (match []string, prefix string, pattern *dirPattern) {
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itemPath = strings.Trim(itemPath, "/")
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absPath := path.Join(root, itemPath)
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prefix = strings.Trim(absPath[len(root):], "/")
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if prefix != "" {
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prefix += "/"
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}
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for i := range ds {
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pattern = &ds[i]
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if pattern.isFile != isFile {
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continue
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}
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match = pattern.match.FindStringSubmatch(absPath)
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if match != nil {
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return
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}
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}
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return nil, "", nil
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}
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// Return the years from startYear to today
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func years(ctx context.Context, f lister, prefix string, match []string) (entries fs.DirEntries, err error) {
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currentYear := f.dirTime().Year()
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for year := f.startYear(); year <= currentYear; year++ {
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entries = append(entries, fs.NewDir(prefix+fmt.Sprint(year), f.dirTime()))
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}
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return entries, nil
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}
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// Return the months in a given year
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func months(ctx context.Context, f lister, prefix string, match []string) (entries fs.DirEntries, err error) {
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year := match[1]
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for month := 1; month <= 12; month++ {
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entries = append(entries, fs.NewDir(fmt.Sprintf("%s%s-%02d", prefix, year, month), f.dirTime()))
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}
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return entries, nil
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}
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// Return the days in a given year
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func days(ctx context.Context, f lister, prefix string, match []string) (entries fs.DirEntries, err error) {
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year := match[1]
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current, err := time.Parse("2006", year)
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if err != nil {
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return nil, fmt.Errorf("bad year %q", match[1])
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}
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currentYear := current.Year()
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for current.Year() == currentYear {
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entries = append(entries, fs.NewDir(prefix+current.Format("2006-01-02"), f.dirTime()))
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current = current.AddDate(0, 0, 1)
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}
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return entries, nil
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}
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// This creates a search filter on year/month/day as provided
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func yearMonthDayFilter(ctx context.Context, f lister, match []string) (sf api.SearchFilter, err error) {
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year, err := strconv.Atoi(match[1])
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if err != nil || year < 1000 || year > 3000 {
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return sf, fmt.Errorf("bad year %q", match[1])
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}
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sf = api.SearchFilter{
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Filters: &api.Filters{
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DateFilter: &api.DateFilter{
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Dates: []api.Date{
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{
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Year: year,
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},
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},
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},
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},
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}
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if len(match) >= 3 {
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month, err := strconv.Atoi(match[2])
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if err != nil || month < 1 || month > 12 {
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return sf, fmt.Errorf("bad month %q", match[2])
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}
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sf.Filters.DateFilter.Dates[0].Month = month
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}
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if len(match) >= 4 {
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day, err := strconv.Atoi(match[3])
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if err != nil || day < 1 || day > 31 {
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return sf, fmt.Errorf("bad day %q", match[3])
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}
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sf.Filters.DateFilter.Dates[0].Day = day
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}
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return sf, nil
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}
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// featureFilter creates a filter for the Feature enum
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//
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// The API only supports one feature, FAVORITES, so hardcode that feature
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//
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// https://developers.google.com/photos/library/reference/rest/v1/mediaItems/search#FeatureFilter
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func featureFilter(ctx context.Context, f lister, match []string) (sf api.SearchFilter) {
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sf = api.SearchFilter{
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Filters: &api.Filters{
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FeatureFilter: &api.FeatureFilter{
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IncludedFeatures: []string{
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"FAVORITES",
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},
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},
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},
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}
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return sf
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}
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// Turns an albumPath into entries
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//
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// These can either be synthetic directory entries if the album path
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// is a prefix of another album, or actual files, or a combination of
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// the two.
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func albumsToEntries(ctx context.Context, f lister, shared bool, prefix string, albumPath string) (entries fs.DirEntries, err error) {
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albums, err := f.listAlbums(ctx, shared)
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if err != nil {
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return nil, err
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}
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// Put in the directories
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dirs, foundAlbumPath := albums.getDirs(albumPath)
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if foundAlbumPath {
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for _, dir := range dirs {
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d := fs.NewDir(prefix+dir, f.dirTime())
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dirPath := path.Join(albumPath, dir)
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// if this dir is an album add more special stuff
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album, ok := albums.get(dirPath)
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if ok {
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count, err := strconv.ParseInt(album.MediaItemsCount, 10, 64)
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if err != nil {
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fs.Debugf(f, "Error reading media count: %v", err)
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}
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d.SetID(album.ID).SetItems(count)
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}
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entries = append(entries, d)
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}
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}
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// if this is an album then return a filter to list it
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album, foundAlbum := albums.get(albumPath)
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if foundAlbum {
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filter := api.SearchFilter{AlbumID: album.ID}
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newEntries, err := f.listDir(ctx, prefix, filter)
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if err != nil {
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return nil, err
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}
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entries = append(entries, newEntries...)
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}
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if !foundAlbumPath && !foundAlbum && albumPath != "" {
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return nil, fs.ErrorDirNotFound
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}
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return entries, nil
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}
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