219 lignes
7.4 KiB
Go
219 lignes
7.4 KiB
Go
package search
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import (
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"strconv"
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"strings"
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"unicode"
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"unicode/utf8"
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"github.com/NyaaPantsu/nyaa/config"
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"github.com/NyaaPantsu/nyaa/models"
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"github.com/NyaaPantsu/nyaa/models/torrents"
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"github.com/NyaaPantsu/nyaa/utils/log"
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"github.com/NyaaPantsu/nyaa/utils/search/structs"
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"github.com/gin-gonic/gin"
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)
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var searchOperator string
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var useTSQuery bool
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// Configure : initialize search
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func Configure(conf *config.SearchConfig) (err error) {
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useTSQuery = false
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// Postgres needs ILIKE for case-insensitivity
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if models.ORM.Dialect().GetName() == "postgres" {
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searchOperator = "ILIKE ?"
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//useTSQuery = true
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// !!DISABLED!! because this makes search a lot stricter
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// (only matches at word borders)
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} else {
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searchOperator = "LIKE ?"
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}
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return
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}
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func stringIsASCII(input string) bool {
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for _, char := range input {
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if char > 127 {
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return false
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}
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}
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return true
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}
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// SearchByQuery : search torrents according to request without user
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func SearchByQuery(c *gin.Context, pagenum int) (search structs.TorrentParam, tor []models.Torrent, count int, err error) {
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search, tor, count, err = searchByQuery(c, pagenum, true, false, false, false)
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return
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}
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// SearchByQueryWithUser : search torrents according to request with user
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func SearchByQueryWithUser(c *gin.Context, pagenum int) (search structs.TorrentParam, tor []models.Torrent, count int, err error) {
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search, tor, count, err = searchByQuery(c, pagenum, true, true, false, false)
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return
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}
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// SearchByQueryNoCount : search torrents according to request without user and count
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func SearchByQueryNoCount(c *gin.Context, pagenum int) (search structs.TorrentParam, tor []models.Torrent, err error) {
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search, tor, _, err = searchByQuery(c, pagenum, false, false, false, false)
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return
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}
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// SearchByQueryDeleted : search deleted torrents according to request with user and count
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func SearchByQueryDeleted(c *gin.Context, pagenum int) (search structs.TorrentParam, tor []models.Torrent, count int, err error) {
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search, tor, count, err = searchByQuery(c, pagenum, true, true, true, false)
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return
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}
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// SearchByQueryNoHidden : search torrents and filter those hidden
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func SearchByQueryNoHidden(c *gin.Context, pagenum int) (search structs.TorrentParam, tor []models.Torrent, count int, err error) {
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search, tor, count, err = searchByQuery(c, pagenum, true, false, false, true)
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return
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}
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// TODO Clean this up
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// FIXME Some fields are not used by elasticsearch (pagenum, countAll, deleted, withUser)
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// pagenum is extracted from request in .FromRequest()
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// elasticsearch always provide a count to how many hits
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// deleted is unused because es doesn't index deleted torrents
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func searchByQuery(c *gin.Context, pagenum int, countAll bool, withUser bool, deleted bool, hidden bool) (
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search structs.TorrentParam, tor []models.Torrent, count int, err error,
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) {
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if models.ElasticSearchClient != nil {
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var torrentParam structs.TorrentParam
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torrentParam.FromRequest(c)
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torrentParam.Offset = uint32(pagenum)
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torrentParam.Hidden = hidden
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totalHits, torrents, err := torrentParam.Find(models.ElasticSearchClient)
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// Convert back to non-json torrents
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return torrentParam, torrents, int(totalHits), err
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}
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log.Errorf("Unable to create elasticsearch client: %s", err)
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log.Errorf("Falling back to postgresql query")
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return searchByQueryPostgres(c, pagenum, countAll, withUser, deleted, hidden)
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}
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func searchByQueryPostgres(c *gin.Context, pagenum int, countAll bool, withUser bool, deleted bool, hidden bool) (
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search structs.TorrentParam, tor []models.Torrent, count int, err error,
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) {
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search.FromRequest(c)
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search.Offset = uint32(pagenum)
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search.Hidden = hidden
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orderBy := search.Sort.ToDBField()
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if search.Sort == structs.Date {
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search.NotNull = search.Sort.ToDBField() + " IS NOT NULL"
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}
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orderBy += " "
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switch search.Order {
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case true:
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orderBy += "asc"
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if models.ORM.Dialect().GetName() == "postgres" {
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orderBy += " NULLS FIRST"
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}
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case false:
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orderBy += "desc"
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if models.ORM.Dialect().GetName() == "postgres" {
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orderBy += " NULLS LAST"
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}
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}
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parameters := structs.WhereParams{
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Params: make([]interface{}, 0, 64),
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}
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conditions := make([]string, 0, 64)
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if len(search.Category) > 0 {
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conditionsOr := make([]string, len(search.Category))
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for key, val := range search.Category {
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conditionsOr[key] = "(category = ? AND sub_category = ?)"
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parameters.Params = append(parameters.Params, val.Main)
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parameters.Params = append(parameters.Params, val.Sub)
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}
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conditions = append(conditions, strings.Join(conditionsOr, " OR "))
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}
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if search.UserID != 0 {
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conditions = append(conditions, "uploader = ?")
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parameters.Params = append(parameters.Params, search.UserID)
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}
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if search.Hidden {
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conditions = append(conditions, "hidden = ?")
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parameters.Params = append(parameters.Params, false)
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}
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if search.FromID != 0 {
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conditions = append(conditions, "torrent_id > ?")
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parameters.Params = append(parameters.Params, search.FromID)
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}
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if search.FromDate != "" {
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conditions = append(conditions, "date >= ?")
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parameters.Params = append(parameters.Params, search.FromDate)
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}
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if search.ToDate != "" {
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conditions = append(conditions, "date <= ?")
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parameters.Params = append(parameters.Params, search.ToDate)
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}
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if search.Status != 0 {
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if search.Status == structs.FilterRemakes {
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conditions = append(conditions, "status <> ?")
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} else {
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conditions = append(conditions, "status >= ?")
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}
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parameters.Params = append(parameters.Params, strconv.Itoa(int(search.Status)+1))
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}
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if len(search.NotNull) > 0 {
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conditions = append(conditions, search.NotNull)
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}
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if search.Language != "" {
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conditions = append(conditions, "language "+searchOperator)
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parameters.Params = append(parameters.Params, "%"+search.Language+"%")
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}
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if search.MinSize > 0 {
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conditions = append(conditions, "filesize >= ?")
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parameters.Params = append(parameters.Params, uint64(search.MinSize))
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}
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if search.MaxSize > 0 {
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conditions = append(conditions, "filesize <= ?")
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parameters.Params = append(parameters.Params, uint64(search.MaxSize))
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}
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querySplit := strings.Fields(search.NameLike)
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for _, word := range querySplit {
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firstRune, _ := utf8.DecodeRuneInString(word)
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if len(word) == 1 && unicode.IsPunct(firstRune) {
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// some queries have a single punctuation character
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// which causes a full scan instead of using the index
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// and yields no meaningful results.
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// due to len() == 1 we're just looking at 1-byte/ascii
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// punctuation characters.
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continue
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}
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if useTSQuery && stringIsASCII(word) {
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conditions = append(conditions, "torrent_name @@ plainto_tsquery(?)")
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parameters.Params = append(parameters.Params, word)
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} else {
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// TODO: possible to make this faster?
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conditions = append(conditions, "torrent_name "+searchOperator)
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parameters.Params = append(parameters.Params, "%"+word+"%")
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}
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}
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parameters.Conditions = strings.Join(conditions[:], " AND ")
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log.Infof("SQL query is :: %s\n", parameters.Conditions)
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if deleted {
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tor, count, err = torrents.FindDeleted(¶meters, orderBy, int(search.Max), int(search.Max*(search.Offset-1)))
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} else if countAll && !withUser {
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tor, count, err = torrents.FindOrderBy(¶meters, orderBy, int(search.Max), int(search.Max*(search.Offset-1)))
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} else if withUser {
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tor, count, err = torrents.FindWithUserOrderBy(¶meters, orderBy, int(search.Max), int(search.Max*(search.Offset-1)))
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} else {
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tor, err = torrents.FindOrderByNoCount(¶meters, orderBy, int(search.Max), int(search.Max*(search.Offset-1)))
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}
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return
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}
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