mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-11-22 03:36:39 +00:00
[bugfix] fix possible infinite loops in media / emoji cleanup (#2590)
* update media / emoji cleaner funcs to use new paging package, check for same returned maxID * fix other calls of getattachments and getmojis not using paging * use alternative order-by function
This commit is contained in:
parent
0f7a2024c3
commit
c9452f32f3
|
@ -31,14 +31,14 @@
|
|||
"github.com/superseriousbusiness/gotosocial/internal/db/bundb"
|
||||
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
|
||||
"github.com/superseriousbusiness/gotosocial/internal/log"
|
||||
"github.com/superseriousbusiness/gotosocial/internal/paging"
|
||||
"github.com/superseriousbusiness/gotosocial/internal/state"
|
||||
)
|
||||
|
||||
type list struct {
|
||||
dbService db.DB
|
||||
state *state.State
|
||||
maxID string
|
||||
limit int
|
||||
page paging.Page
|
||||
localOnly bool
|
||||
remoteOnly bool
|
||||
out *bufio.Writer
|
||||
|
@ -47,31 +47,32 @@ type list struct {
|
|||
// Get a list of attachment using a custom filter
|
||||
func (l *list) GetAllAttachmentPaths(ctx context.Context, filter func(*gtsmodel.MediaAttachment) string) ([]string, error) {
|
||||
res := make([]string, 0, 100)
|
||||
|
||||
for {
|
||||
attachments, err := l.dbService.GetAttachments(ctx, l.maxID, l.limit)
|
||||
if err != nil {
|
||||
// Get the next page of media attachments up to max ID.
|
||||
attachments, err := l.dbService.GetAttachments(ctx, &l.page)
|
||||
if err != nil && !errors.Is(err, db.ErrNoEntries) {
|
||||
return nil, fmt.Errorf("failed to retrieve media metadata from database: %w", err)
|
||||
}
|
||||
|
||||
// Get current max ID.
|
||||
maxID := l.page.Max.Value
|
||||
|
||||
// If no attachments or the same group is returned, we reached the end.
|
||||
if len(attachments) == 0 || maxID == attachments[len(attachments)-1].ID {
|
||||
break
|
||||
}
|
||||
|
||||
// Use last ID as the next 'maxID' value.
|
||||
maxID = attachments[len(attachments)-1].ID
|
||||
l.page.Max = paging.MaxID(maxID)
|
||||
|
||||
for _, a := range attachments {
|
||||
v := filter(a)
|
||||
if v != "" {
|
||||
res = append(res, v)
|
||||
}
|
||||
}
|
||||
|
||||
// If we got less results than our limit, we've reached the
|
||||
// last page to retrieve and we can break the loop. If the
|
||||
// last batch happens to contain exactly the same amount of
|
||||
// items as the limit we'll end up doing one extra query.
|
||||
if len(attachments) < l.limit {
|
||||
break
|
||||
}
|
||||
|
||||
// Grab the last ID from the batch and set it as the maxID
|
||||
// that'll be used in the next iteration so we don't get items
|
||||
// we've already seen.
|
||||
l.maxID = attachments[len(attachments)-1].ID
|
||||
}
|
||||
return res, nil
|
||||
}
|
||||
|
@ -80,30 +81,30 @@ func (l *list) GetAllAttachmentPaths(ctx context.Context, filter func(*gtsmodel.
|
|||
func (l *list) GetAllEmojisPaths(ctx context.Context, filter func(*gtsmodel.Emoji) string) ([]string, error) {
|
||||
res := make([]string, 0, 100)
|
||||
for {
|
||||
attachments, err := l.dbService.GetEmojis(ctx, l.maxID, l.limit)
|
||||
// Get the next page of emoji media up to max ID.
|
||||
attachments, err := l.dbService.GetEmojis(ctx, &l.page)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("failed to retrieve media metadata from database: %w", err)
|
||||
}
|
||||
|
||||
// Get current max ID.
|
||||
maxID := l.page.Max.Value
|
||||
|
||||
// If no attachments or the same group is returned, we reached the end.
|
||||
if len(attachments) == 0 || maxID == attachments[len(attachments)-1].ID {
|
||||
break
|
||||
}
|
||||
|
||||
// Use last ID as the next 'maxID' value.
|
||||
maxID = attachments[len(attachments)-1].ID
|
||||
l.page.Max = paging.MaxID(maxID)
|
||||
|
||||
for _, a := range attachments {
|
||||
v := filter(a)
|
||||
if v != "" {
|
||||
res = append(res, v)
|
||||
}
|
||||
}
|
||||
|
||||
// If we got less results than our limit, we've reached the
|
||||
// last page to retrieve and we can break the loop. If the
|
||||
// last batch happens to contain exactly the same amount of
|
||||
// items as the limit we'll end up doing one extra query.
|
||||
if len(attachments) < l.limit {
|
||||
break
|
||||
}
|
||||
|
||||
// Grab the last ID from the batch and set it as the maxID
|
||||
// that'll be used in the next iteration so we don't get items
|
||||
// we've already seen.
|
||||
l.maxID = attachments[len(attachments)-1].ID
|
||||
}
|
||||
return res, nil
|
||||
}
|
||||
|
@ -137,8 +138,7 @@ func setupList(ctx context.Context) (*list, error) {
|
|||
return &list{
|
||||
dbService: dbService,
|
||||
state: &state,
|
||||
limit: 200,
|
||||
maxID: "",
|
||||
page: paging.Page{Limit: 200},
|
||||
localOnly: localOnly,
|
||||
remoteOnly: remoteOnly,
|
||||
out: bufio.NewWriter(os.Stdout),
|
||||
|
|
|
@ -27,6 +27,7 @@
|
|||
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
|
||||
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
|
||||
"github.com/superseriousbusiness/gotosocial/internal/log"
|
||||
"github.com/superseriousbusiness/gotosocial/internal/paging"
|
||||
)
|
||||
|
||||
// Emoji encompasses a set of
|
||||
|
@ -105,8 +106,9 @@ func (e *Emoji) UncacheRemote(ctx context.Context, olderThan time.Time) (int, er
|
|||
return total, gtserror.Newf("error getting remote emoji: %w", err)
|
||||
}
|
||||
|
||||
if len(emojis) == 0 {
|
||||
// reached end.
|
||||
// If no emojis / same group is returned, we reached the end.
|
||||
if len(emojis) == 0 ||
|
||||
olderThan.Equal(emojis[len(emojis)-1].CreatedAt) {
|
||||
break
|
||||
}
|
||||
|
||||
|
@ -140,23 +142,30 @@ func (e *Emoji) UncacheRemote(ctx context.Context, olderThan time.Time) (int, er
|
|||
func (e *Emoji) FixBroken(ctx context.Context) (int, error) {
|
||||
var (
|
||||
total int
|
||||
maxID string
|
||||
page paging.Page
|
||||
)
|
||||
|
||||
// Set page select limit.
|
||||
page.Limit = selectLimit
|
||||
|
||||
for {
|
||||
// Fetch the next batch of emoji media up to next ID.
|
||||
emojis, err := e.state.DB.GetEmojis(ctx, maxID, selectLimit)
|
||||
// Fetch the next batch of emoji to next max ID.
|
||||
emojis, err := e.state.DB.GetEmojis(ctx, &page)
|
||||
if err != nil && !errors.Is(err, db.ErrNoEntries) {
|
||||
return total, gtserror.Newf("error getting emojis: %w", err)
|
||||
}
|
||||
|
||||
if len(emojis) == 0 {
|
||||
// reached end.
|
||||
// Get current max ID.
|
||||
maxID := page.Max.Value
|
||||
|
||||
// If no emoji or the same group is returned, we reached end.
|
||||
if len(emojis) == 0 || maxID == emojis[len(emojis)-1].ID {
|
||||
break
|
||||
}
|
||||
|
||||
// Use last as the next 'maxID' value.
|
||||
// Use last ID as the next 'maxID'.
|
||||
maxID = emojis[len(emojis)-1].ID
|
||||
page.Max = paging.MaxID(maxID)
|
||||
|
||||
for _, emoji := range emojis {
|
||||
// Check / fix missing broken emoji.
|
||||
|
@ -182,23 +191,30 @@ func (e *Emoji) FixBroken(ctx context.Context) (int, error) {
|
|||
func (e *Emoji) PruneUnused(ctx context.Context) (int, error) {
|
||||
var (
|
||||
total int
|
||||
maxID string
|
||||
page paging.Page
|
||||
)
|
||||
|
||||
// Set page select limit.
|
||||
page.Limit = selectLimit
|
||||
|
||||
for {
|
||||
// Fetch the next batch of emoji media up to next ID.
|
||||
emojis, err := e.state.DB.GetRemoteEmojis(ctx, maxID, selectLimit)
|
||||
// Fetch the next batch of emoji to next max ID.
|
||||
emojis, err := e.state.DB.GetRemoteEmojis(ctx, &page)
|
||||
if err != nil && !errors.Is(err, db.ErrNoEntries) {
|
||||
return total, gtserror.Newf("error getting remote emojis: %w", err)
|
||||
}
|
||||
|
||||
if len(emojis) == 0 {
|
||||
// reached end.
|
||||
// Get current max ID.
|
||||
maxID := page.Max.Value
|
||||
|
||||
// If no emoji or the same group is returned, we reached end.
|
||||
if len(emojis) == 0 || maxID == emojis[len(emojis)-1].ID {
|
||||
break
|
||||
}
|
||||
|
||||
// Use last as the next 'maxID' value.
|
||||
// Use last ID as the next 'maxID'.
|
||||
maxID = emojis[len(emojis)-1].ID
|
||||
page.Max = paging.MaxID(maxID)
|
||||
|
||||
for _, emoji := range emojis {
|
||||
// Check / prune unused emoji media.
|
||||
|
@ -224,23 +240,30 @@ func (e *Emoji) PruneUnused(ctx context.Context) (int, error) {
|
|||
func (e *Emoji) FixCacheStates(ctx context.Context) (int, error) {
|
||||
var (
|
||||
total int
|
||||
maxID string
|
||||
page paging.Page
|
||||
)
|
||||
|
||||
// Set page select limit.
|
||||
page.Limit = selectLimit
|
||||
|
||||
for {
|
||||
// Fetch the next batch of emoji media up to next ID.
|
||||
emojis, err := e.state.DB.GetRemoteEmojis(ctx, maxID, selectLimit)
|
||||
// Fetch the next batch of emoji to next max ID.
|
||||
emojis, err := e.state.DB.GetRemoteEmojis(ctx, &page)
|
||||
if err != nil && !errors.Is(err, db.ErrNoEntries) {
|
||||
return total, gtserror.Newf("error getting remote emojis: %w", err)
|
||||
}
|
||||
|
||||
if len(emojis) == 0 {
|
||||
// reached end.
|
||||
// Get current max ID.
|
||||
maxID := page.Max.Value
|
||||
|
||||
// If no emoji or the same group is returned, we reached end.
|
||||
if len(emojis) == 0 || maxID == emojis[len(emojis)-1].ID {
|
||||
break
|
||||
}
|
||||
|
||||
// Use last as the next 'maxID' value.
|
||||
// Use last ID as the next 'maxID'.
|
||||
maxID = emojis[len(emojis)-1].ID
|
||||
page.Max = paging.MaxID(maxID)
|
||||
|
||||
for _, emoji := range emojis {
|
||||
// Check / fix required emoji cache states.
|
||||
|
|
|
@ -28,6 +28,7 @@
|
|||
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
|
||||
"github.com/superseriousbusiness/gotosocial/internal/log"
|
||||
"github.com/superseriousbusiness/gotosocial/internal/media"
|
||||
"github.com/superseriousbusiness/gotosocial/internal/paging"
|
||||
"github.com/superseriousbusiness/gotosocial/internal/regexes"
|
||||
"github.com/superseriousbusiness/gotosocial/internal/uris"
|
||||
)
|
||||
|
@ -128,23 +129,30 @@ func (m *Media) PruneOrphaned(ctx context.Context) (int, error) {
|
|||
func (m *Media) PruneUnused(ctx context.Context) (int, error) {
|
||||
var (
|
||||
total int
|
||||
maxID string
|
||||
page paging.Page
|
||||
)
|
||||
|
||||
// Set page select limit.
|
||||
page.Limit = selectLimit
|
||||
|
||||
for {
|
||||
// Fetch the next batch of media attachments up to next max ID.
|
||||
attachments, err := m.state.DB.GetAttachments(ctx, maxID, selectLimit)
|
||||
// Fetch the next batch of media attachments to next maxID.
|
||||
attachments, err := m.state.DB.GetAttachments(ctx, &page)
|
||||
if err != nil && !errors.Is(err, db.ErrNoEntries) {
|
||||
return total, gtserror.Newf("error getting attachments: %w", err)
|
||||
}
|
||||
|
||||
if len(attachments) == 0 {
|
||||
// reached end.
|
||||
// Get current max ID.
|
||||
maxID := page.Max.Value
|
||||
|
||||
// If no attachments or the same group is returned, we reached the end.
|
||||
if len(attachments) == 0 || maxID == attachments[len(attachments)-1].ID {
|
||||
break
|
||||
}
|
||||
|
||||
// Use last ID as the next 'maxID' value.
|
||||
maxID = attachments[len(attachments)-1].ID
|
||||
page.Max = paging.MaxID(maxID)
|
||||
|
||||
for _, media := range attachments {
|
||||
// Check / prune unused media attachment.
|
||||
|
@ -183,8 +191,9 @@ func (m *Media) UncacheRemote(ctx context.Context, olderThan time.Time) (int, er
|
|||
return total, gtserror.Newf("error getting remote attachments: %w", err)
|
||||
}
|
||||
|
||||
if len(attachments) == 0 {
|
||||
// reached end.
|
||||
// If no attachments / same group is returned, we reached the end.
|
||||
if len(attachments) == 0 ||
|
||||
olderThan.Equal(attachments[len(attachments)-1].CreatedAt) {
|
||||
break
|
||||
}
|
||||
|
||||
|
@ -215,23 +224,29 @@ func (m *Media) UncacheRemote(ctx context.Context, olderThan time.Time) (int, er
|
|||
func (m *Media) FixCacheStates(ctx context.Context) (int, error) {
|
||||
var (
|
||||
total int
|
||||
maxID string
|
||||
page paging.Page
|
||||
)
|
||||
|
||||
// Set page select limit.
|
||||
page.Limit = selectLimit
|
||||
|
||||
for {
|
||||
// Fetch the next batch of media attachments up to next max ID.
|
||||
attachments, err := m.state.DB.GetRemoteAttachments(ctx, maxID, selectLimit)
|
||||
attachments, err := m.state.DB.GetRemoteAttachments(ctx, &page)
|
||||
if err != nil && !errors.Is(err, db.ErrNoEntries) {
|
||||
return total, gtserror.Newf("error getting remote attachments: %w", err)
|
||||
}
|
||||
// Get current max ID.
|
||||
maxID := page.Max.Value
|
||||
|
||||
if len(attachments) == 0 {
|
||||
// reached end.
|
||||
// If no attachments or the same group is returned, we reached the end.
|
||||
if len(attachments) == 0 || maxID == attachments[len(attachments)-1].ID {
|
||||
break
|
||||
}
|
||||
|
||||
// Use last ID as the next 'maxID' value.
|
||||
maxID = attachments[len(attachments)-1].ID
|
||||
page.Max = paging.MaxID(maxID)
|
||||
|
||||
for _, media := range attachments {
|
||||
// Check / fix required media cache states.
|
||||
|
|
|
@ -30,6 +30,7 @@
|
|||
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
|
||||
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
|
||||
"github.com/superseriousbusiness/gotosocial/internal/log"
|
||||
"github.com/superseriousbusiness/gotosocial/internal/paging"
|
||||
"github.com/superseriousbusiness/gotosocial/internal/state"
|
||||
"github.com/superseriousbusiness/gotosocial/internal/util"
|
||||
"github.com/uptrace/bun"
|
||||
|
@ -326,8 +327,11 @@ func (e *emojiDB) GetEmojisBy(ctx context.Context, domain string, includeDisable
|
|||
return e.GetEmojisByIDs(ctx, emojiIDs)
|
||||
}
|
||||
|
||||
func (e *emojiDB) GetEmojis(ctx context.Context, maxID string, limit int) ([]*gtsmodel.Emoji, error) {
|
||||
var emojiIDs []string
|
||||
func (e *emojiDB) GetEmojis(ctx context.Context, page *paging.Page) ([]*gtsmodel.Emoji, error) {
|
||||
maxID := page.GetMax()
|
||||
limit := page.GetLimit()
|
||||
|
||||
emojiIDs := make([]string, 0, limit)
|
||||
|
||||
q := e.db.NewSelect().
|
||||
Table("emojis").
|
||||
|
@ -349,8 +353,11 @@ func (e *emojiDB) GetEmojis(ctx context.Context, maxID string, limit int) ([]*gt
|
|||
return e.GetEmojisByIDs(ctx, emojiIDs)
|
||||
}
|
||||
|
||||
func (e *emojiDB) GetRemoteEmojis(ctx context.Context, maxID string, limit int) ([]*gtsmodel.Emoji, error) {
|
||||
var emojiIDs []string
|
||||
func (e *emojiDB) GetRemoteEmojis(ctx context.Context, page *paging.Page) ([]*gtsmodel.Emoji, error) {
|
||||
maxID := page.GetMax()
|
||||
limit := page.GetLimit()
|
||||
|
||||
emojiIDs := make([]string, 0, limit)
|
||||
|
||||
q := e.db.NewSelect().
|
||||
Table("emojis").
|
||||
|
|
|
@ -27,6 +27,7 @@
|
|||
"github.com/superseriousbusiness/gotosocial/internal/gtscontext"
|
||||
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
|
||||
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
|
||||
"github.com/superseriousbusiness/gotosocial/internal/paging"
|
||||
"github.com/superseriousbusiness/gotosocial/internal/state"
|
||||
"github.com/superseriousbusiness/gotosocial/internal/util"
|
||||
"github.com/uptrace/bun"
|
||||
|
@ -232,7 +233,10 @@ func (m *mediaDB) DeleteAttachment(ctx context.Context, id string) error {
|
|||
return err
|
||||
}
|
||||
|
||||
func (m *mediaDB) GetAttachments(ctx context.Context, maxID string, limit int) ([]*gtsmodel.MediaAttachment, error) {
|
||||
func (m *mediaDB) GetAttachments(ctx context.Context, page *paging.Page) ([]*gtsmodel.MediaAttachment, error) {
|
||||
maxID := page.GetMax()
|
||||
limit := page.GetLimit()
|
||||
|
||||
attachmentIDs := make([]string, 0, limit)
|
||||
|
||||
q := m.db.NewSelect().
|
||||
|
@ -255,7 +259,10 @@ func (m *mediaDB) GetAttachments(ctx context.Context, maxID string, limit int) (
|
|||
return m.GetAttachmentsByIDs(ctx, attachmentIDs)
|
||||
}
|
||||
|
||||
func (m *mediaDB) GetRemoteAttachments(ctx context.Context, maxID string, limit int) ([]*gtsmodel.MediaAttachment, error) {
|
||||
func (m *mediaDB) GetRemoteAttachments(ctx context.Context, page *paging.Page) ([]*gtsmodel.MediaAttachment, error) {
|
||||
maxID := page.GetMax()
|
||||
limit := page.GetLimit()
|
||||
|
||||
attachmentIDs := make([]string, 0, limit)
|
||||
|
||||
q := m.db.NewSelect().
|
||||
|
|
|
@ -22,6 +22,7 @@
|
|||
"time"
|
||||
|
||||
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
|
||||
"github.com/superseriousbusiness/gotosocial/internal/paging"
|
||||
)
|
||||
|
||||
// EmojiAllDomains can be used as the `domain` value in a GetEmojis
|
||||
|
@ -47,10 +48,10 @@ type Emoji interface {
|
|||
GetUseableEmojis(ctx context.Context) ([]*gtsmodel.Emoji, error)
|
||||
|
||||
// GetEmojis fetches all emojis with IDs less than 'maxID', up to a maximum of 'limit' emojis.
|
||||
GetEmojis(ctx context.Context, maxID string, limit int) ([]*gtsmodel.Emoji, error)
|
||||
GetEmojis(ctx context.Context, page *paging.Page) ([]*gtsmodel.Emoji, error)
|
||||
|
||||
// GetRemoteEmojis fetches all remote emojis with IDs less than 'maxID', up to a maximum of 'limit' emojis.
|
||||
GetRemoteEmojis(ctx context.Context, maxID string, limit int) ([]*gtsmodel.Emoji, error)
|
||||
GetRemoteEmojis(ctx context.Context, page *paging.Page) ([]*gtsmodel.Emoji, error)
|
||||
|
||||
// GetCachedEmojisOlderThan fetches all cached remote emojis with 'updated_at' greater than 'olderThan', up to a maximum of 'limit' emojis.
|
||||
GetCachedEmojisOlderThan(ctx context.Context, olderThan time.Time, limit int) ([]*gtsmodel.Emoji, error)
|
||||
|
|
|
@ -22,6 +22,7 @@
|
|||
"time"
|
||||
|
||||
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
|
||||
"github.com/superseriousbusiness/gotosocial/internal/paging"
|
||||
)
|
||||
|
||||
// Media contains functions related to creating/getting/removing media attachments.
|
||||
|
@ -42,10 +43,10 @@ type Media interface {
|
|||
DeleteAttachment(ctx context.Context, id string) error
|
||||
|
||||
// GetAttachments fetches media attachments up to a given max ID, and at most limit.
|
||||
GetAttachments(ctx context.Context, maxID string, limit int) ([]*gtsmodel.MediaAttachment, error)
|
||||
GetAttachments(ctx context.Context, page *paging.Page) ([]*gtsmodel.MediaAttachment, error)
|
||||
|
||||
// GetRemoteAttachments fetches media attachments with a non-empty domain, up to a given max ID, and at most limit.
|
||||
GetRemoteAttachments(ctx context.Context, maxID string, limit int) ([]*gtsmodel.MediaAttachment, error)
|
||||
GetRemoteAttachments(ctx context.Context, page *paging.Page) ([]*gtsmodel.MediaAttachment, error)
|
||||
|
||||
// GetCachedAttachmentsOlderThan gets limit n remote attachments (including avatars and headers) older than
|
||||
// the given time. These will be returned in order of attachment.created_at descending (i.e. newest to oldest).
|
||||
|
|
|
@ -17,6 +17,8 @@
|
|||
|
||||
package util
|
||||
|
||||
import "slices"
|
||||
|
||||
// Deduplicate deduplicates entries in the given slice.
|
||||
func Deduplicate[T comparable](in []T) []T {
|
||||
var (
|
||||
|
@ -47,6 +49,10 @@ func DeduplicateFunc[T any, C comparable](in []T, key func(v T) C) []T {
|
|||
deduped = make([]T, 0, inL)
|
||||
)
|
||||
|
||||
if key == nil {
|
||||
panic("nil func")
|
||||
}
|
||||
|
||||
for _, v := range in {
|
||||
k := key(v)
|
||||
|
||||
|
@ -66,6 +72,10 @@ func DeduplicateFunc[T any, C comparable](in []T, key func(v T) C) []T {
|
|||
// passing each item to 'get' and deduplicating the end result.
|
||||
// Compared to Deduplicate() this returns []K, NOT input type []T.
|
||||
func Collate[T any, K comparable](in []T, get func(T) K) []K {
|
||||
if get == nil {
|
||||
panic("nil func")
|
||||
}
|
||||
|
||||
ks := make([]K, 0, len(in))
|
||||
km := make(map[K]struct{}, len(in))
|
||||
|
||||
|
@ -86,50 +96,25 @@ func Collate[T any, K comparable](in []T, get func(T) K) []K {
|
|||
|
||||
// OrderBy orders a slice of given type by the provided alternative slice of comparable type.
|
||||
func OrderBy[T any, K comparable](in []T, keys []K, key func(T) K) {
|
||||
var (
|
||||
start int
|
||||
offset int
|
||||
)
|
||||
|
||||
for i := 0; i < len(keys); i++ {
|
||||
var (
|
||||
// key at index.
|
||||
k = keys[i]
|
||||
|
||||
// sentinel
|
||||
// idx value.
|
||||
idx = -1
|
||||
)
|
||||
|
||||
// Look for model with key in slice.
|
||||
for j := start; j < len(in); j++ {
|
||||
if key(in[j]) == k {
|
||||
idx = j
|
||||
break
|
||||
}
|
||||
if key == nil {
|
||||
panic("nil func")
|
||||
}
|
||||
|
||||
if idx == -1 {
|
||||
// model with key
|
||||
// was not found.
|
||||
offset++
|
||||
continue
|
||||
// Create lookup of keys->idx.
|
||||
m := make(map[K]int, len(in))
|
||||
for i, k := range keys {
|
||||
m[k] = i
|
||||
}
|
||||
|
||||
// Update
|
||||
// start
|
||||
start++
|
||||
|
||||
// Expected ID index.
|
||||
exp := i - offset
|
||||
|
||||
if idx == exp {
|
||||
// Model is in expected
|
||||
// location, keep going.
|
||||
continue
|
||||
}
|
||||
|
||||
// Swap models at current and expected.
|
||||
in[idx], in[exp] = in[exp], in[idx]
|
||||
// Sort according to the reverse lookup.
|
||||
slices.SortFunc(in, func(a, b T) int {
|
||||
ai := m[key(a)]
|
||||
bi := m[key(b)]
|
||||
if ai < bi {
|
||||
return -1
|
||||
} else if bi < ai {
|
||||
return +1
|
||||
}
|
||||
return 0
|
||||
})
|
||||
}
|
||||
|
|
Loading…
Reference in a new issue