/
list_parse_movies.go
346 lines (320 loc) · 9.57 KB
/
list_parse_movies.go
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package main
import (
"bytes"
"io"
"strconv"
"github.com/BurntSushi/csql"
"github.com/BurntSushi/goim/imdb"
)
// The following are used to identify special strings in a movie line from
// the movies list.
var attrTv, attrVid, attrVg = []byte("(TV)"), []byte("(V)"), []byte("(VG)")
var attrUnknownYear, attrSuspended = []byte("????"), []byte("{{SUSPENDED}}")
func listMovies(db *imdb.DB, movies io.ReadCloser) (err error) {
defer csql.Safe(&err)
logf("Reading movies list...")
addedMovies, addedTvshows, addedEpisodes := 0, 0, 0
// PostgreSQL wants different transactions for each inserter.
// SQLite can't handle them. The wrapper type here ensures that
// PostgreSQL gets multiple transactions while SQLite only gets one.
tx, err := db.Begin()
csql.Panic(err)
txmovie := wrapTx(db, tx)
txtv := txmovie.another()
txepisode := txmovie.another()
txname := txmovie.another()
txatom := txmovie.another()
// Drop data from the movie, tvshow and episode tables. They will be
// rebuilt below.
// The key here is to leave the atom and name tables alone. Invariably,
// they will contain stale data. But the only side effect, I think, is
// taking up space.
// (Stale data can be removed with 'goim clean'.)
csql.Truncate(txmovie, db.Driver, "movie")
csql.Truncate(txtv, db.Driver, "tvshow")
csql.Truncate(txepisode, db.Driver, "episode")
mvIns, err := csql.NewInserter(txmovie.Tx, db.Driver, "movie",
"atom_id", "year", "sequence", "tv", "video")
csql.Panic(err)
tvIns, err := csql.NewInserter(txtv.Tx, db.Driver, "tvshow",
"atom_id", "year", "sequence", "year_start", "year_end")
csql.Panic(err)
epIns, err := csql.NewInserter(txepisode.Tx, db.Driver, "episode",
"atom_id", "tvshow_atom_id", "year", "season", "episode_num")
csql.Panic(err)
nameIns, err := csql.NewInserter(txname.Tx, db.Driver, "name",
"atom_id", "name")
csql.Panic(err)
atoms, err := newAtomizer(db, txatom.Tx)
csql.Panic(err)
defer func() {
csql.Panic(mvIns.Exec())
csql.Panic(tvIns.Exec())
csql.Panic(epIns.Exec())
csql.Panic(nameIns.Exec())
csql.Panic(atoms.Close())
csql.Panic(txmovie.Commit())
csql.Panic(txtv.Commit())
csql.Panic(txepisode.Commit())
csql.Panic(txname.Commit())
csql.Panic(txatom.Commit())
logf("Done. Added %d movies, %d tv shows and %d episodes.",
addedMovies, addedTvshows, addedEpisodes)
}()
listLines(movies, func(line []byte) {
line = bytes.TrimSpace(line)
fields := splitListLine(line)
if len(fields) <= 1 {
return
}
item, value := fields[0], fields[1]
switch ent := mediaType(item); ent {
case imdb.EntityMovie:
m := imdb.Movie{}
if !parseMovie(item, &m) {
return
}
if existed, err := parseId(atoms, item, &m.Id); err != nil {
csql.Panic(err)
} else if !existed {
// We only add a name when we add an atom.
if err = nameIns.Exec(m.Id, m.Title); err != nil {
logf("Full movie info (that failed to add): %#v", m)
csql.Panic(ef("Could not add name '%s': %s", m, err))
}
}
err := mvIns.Exec(m.Id, m.Year, m.Sequence, m.Tv, m.Video)
if err != nil {
logf("Full movie info (that failed to add): %#v", m)
csql.Panic(ef("Could not add movie '%s': %s", m, err))
}
addedMovies++
case imdb.EntityTvshow:
tv := imdb.Tvshow{}
if !parseTvshow(item, &tv) {
return
}
if !parseTvshowRange(value, &tv) {
return
}
if existed, err := parseId(atoms, item, &tv.Id); err != nil {
csql.Panic(err)
} else if !existed {
// We only add a name when we add an atom.
if err = nameIns.Exec(tv.Id, tv.Title); err != nil {
logf("Full tvshow info (that failed to add): %#v", tv)
csql.Panic(ef("Could not add name '%s': %s", tv, err))
}
}
err := tvIns.Exec(tv.Id, tv.Year, tv.Sequence,
tv.YearStart, tv.YearEnd)
if err != nil {
logf("Full tvshow info (that failed to add): %#v", tv)
csql.Panic(ef("Could not add tvshow '%s': %s", tv, err))
}
addedTvshows++
case imdb.EntityEpisode:
ep := imdb.Episode{}
if !parseEpisode(atoms, item, &ep) {
return
}
if !parseEpisodeYear(value, &ep) {
return
}
if existed, err := parseId(atoms, item, &ep.Id); err != nil {
csql.Panic(err)
} else if !existed {
// We only add a name when we add an atom.
if err = nameIns.Exec(ep.Id, ep.Title); err != nil {
logf("Full episode info (that failed to add): %#v", ep)
csql.Panic(ef("Could not add name '%s': %s", ep, err))
}
}
err := epIns.Exec(ep.Id, ep.TvshowId, ep.Year,
ep.Season, ep.EpisodeNum)
if err != nil {
logf("Full episode info (that failed to add): %#v", ep)
csql.Panic(ef("Could not add episode '%s': %s", ep, err))
}
addedEpisodes++
default:
csql.Panic(ef("Unrecognized entity %s", ent))
}
})
return
}
func parseTvshow(tvshow []byte, tv *imdb.Tvshow) bool {
var field []byte
fields := bytes.Fields(tvshow)
for i := len(fields) - 1; i >= 0; i-- {
field = fields[i]
if hasEntryYear(field) {
err := parseEntryYear(field, &tv.Year, &tv.Sequence)
if err != nil {
pef("Could not convert '%s' to year: %s", field, err)
return false
}
tv.Title = parseTvshowTitle(bytes.Join(fields[0:i], space))
return true
}
}
pef("Could not find title in '%s'.", tvshow)
return false
}
func parseTvshowRange(years []byte, tv *imdb.Tvshow) bool {
rangeSplit := bytes.Split(years, hypen)
if err := parseEntryYear(rangeSplit[0], &tv.YearStart, nil); err != nil {
pef("Could not parse '%s' as year in: %s", rangeSplit[0], years)
return false
}
if len(rangeSplit) > 1 {
if err := parseEntryYear(rangeSplit[1], &tv.YearEnd, nil); err != nil {
pef("Could not parse '%s' as year in: %s", rangeSplit[1], years)
return false
}
}
return true
}
func parseEpisode(az *atomizer, episode []byte, ep *imdb.Episode) bool {
if episode[len(episode)-1] != '}' {
pef("Episodes must end with '}' but '%s' does not.", episode)
return false
}
openBrace := bytes.IndexByte(episode, '{')
if openBrace == -1 {
pef("Episodes must have a '{..}' but '%s' does not.", episode)
return false
}
if az != nil {
var err error
ep.TvshowId, _, err = az.atom(episode[0:openBrace])
if err != nil {
pef("Could not atomize TV show '%s' from episode '%s': %s",
episode[0:openBrace], episode, err)
return false
}
}
// The season/episode numbers are optional.
inBraces := episode[openBrace+1 : len(episode)-1]
start := parseEpisodeNumbers(inBraces, &ep.Season, &ep.EpisodeNum)
ep.Title = unicode(bytes.TrimSpace(inBraces[0:start]))
return true
}
func parseEpisodeNumbers(inBraces []byte, season *int, episode *int) int {
if inBraces[len(inBraces)-1] != ')' {
return len(inBraces)
}
start := bytes.LastIndex(inBraces, openHash)
if start == -1 {
return len(inBraces)
}
numbers := inBraces[start+2 : len(inBraces)-1]
sepi := bytes.IndexByte(numbers, '.')
if sepi == -1 {
// assume season 1
*season = 1
if err := parseInt(numbers, episode); err != nil {
pef("Could not parse '%s' as episode number in: %s",
numbers, inBraces)
}
return start // can't read'em, so ignore'em
}
sn, en := numbers[:sepi], numbers[sepi+1:]
if err := parseInt(sn, season); err != nil {
pef("Could not parse '%s' as season in: %s", sn, inBraces)
}
if err := parseInt(en, episode); err != nil {
pef("Could not parse '%s' as episode number in: %s", en, inBraces)
}
return start
}
func parseEpisodeYear(year []byte, ep *imdb.Episode) bool {
if err := parseEntryYear(year, &ep.Year, nil); err != nil {
pef("Could not parse '%s' as year.", year)
return false
}
return true
}
func parseMovie(movie []byte, m *imdb.Movie) bool {
// We start backwards and greedily consume the following attributes:
// (YYYY) - The year the movie was released.
// Everything after (errm, before) this is the title.
// (TV) - Made for TV
// (V) - Made for video
// (VG) - A video game! Skip it.
var field []byte
fields := bytes.Fields(movie)
for i := len(fields) - 1; i >= 0; i-- {
field = fields[i]
switch {
// Try the common case first.
case hasEntryYear(field):
err := parseEntryYear(field[1:len(field)-1], &m.Year, &m.Sequence)
if err != nil {
pef("Could not convert '%s' to year: %s", field, err)
return false
}
m.Title = unicode(bytes.Join(fields[0:i], []byte{' '}))
return true
case bytes.Equal(field, attrVg):
return false
case bytes.Equal(field, attrTv):
m.Tv = true
case bytes.Equal(field, attrVid):
m.Video = true
}
}
pef("Could not find title in '%s'.", movie)
return false
}
func parseTvshowTitle(quoted []byte) string {
return unicode(bytes.Trim(bytes.TrimSpace(quoted), "\""))
}
func parseEntryYear(inParens []byte, store *int, sequence *string) error {
if inParens[0] == '(' && inParens[len(inParens)-1] == ')' {
inParens = inParens[1 : len(inParens)-1]
}
if !bytes.Equal(inParens[0:4], attrUnknownYear) {
n, err := strconv.Atoi(string(inParens[0:4]))
if err != nil {
return err
}
*store = int(n)
}
if sequence != nil && len(inParens) > 4 && inParens[4] == '/' {
*sequence = unicode(inParens[5:])
}
return nil
}
// hasEntryYear returns true if and only if
// 'f' is of the form '(YYYY[/RomanNumeral])'.
func hasEntryYear(f []byte) bool {
if f[0] != '(' || f[len(f)-1] != ')' {
return false
}
if len(f) < 6 {
return false
}
for _, b := range f[1 : len(f)-1] {
if b >= '0' && b <= '9' {
continue
}
if b == '?' || b == '/' || b == 'I' || b == 'V' || b == 'X' {
continue
}
return false
}
return true
}
func mediaType(item []byte) imdb.EntityKind {
switch {
case item[0] == '"':
if item[len(item)-1] == '}' {
return imdb.EntityEpisode
} else {
return imdb.EntityTvshow
}
default:
return imdb.EntityMovie
}
}