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feat: Add list limit support

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This commit is contained in:
Felicitas Pojtinger
2021-12-18 23:12:52 +01:00
parent 4efc0ae249
commit d38b97f1ff
4 changed files with 67 additions and 36 deletions
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internal/fs/file.go
+1 -1
View File
@@ -80,6 +80,7 @@ func (f *File) Readdir(count int) ([]os.FileInfo, error) {
f.metadata,
f.path,
count,
f.onHeader,
)
@@ -89,7 +90,6 @@ func (f *File) Readdir(count int) ([]os.FileInfo, error) {
fileInfos := []os.FileInfo{}
for _, hdr := range hdrs {
// TODO: Handle count; only return all if count = -1
fileInfos = append(fileInfos, NewFileInfo(hdr))
}
internal/persisters/metadata.go
+58 -34
View File
@@ -187,7 +187,7 @@ func (p *MetadataPersister) GetHeaderChildren(ctx context.Context, name string)
return outhdrs, nil
}
func (p *MetadataPersister) GetHeaderDirectChildren(ctx context.Context, name string) (models.HeaderSlice, error) {
func (p *MetadataPersister) GetHeaderDirectChildren(ctx context.Context, name string, limit int) (models.HeaderSlice, error) {
prefix := strings.TrimSuffix(name, "/") + "/"
rootDepth := 0
headers := models.HeaderSlice{}
@@ -217,9 +217,8 @@ func (p *MetadataPersister) GetHeaderDirectChildren(ctx context.Context, name st
}
getHeaders := func(prefix string) (models.HeaderSlice, error) {
if err := queries.Raw(
fmt.Sprintf(
`select %v, %v, %v, %v, %v, %v, %v, %v, %v, %v, %v, %v, %v, %v, %v, %v, %v, %v, %v, %v, %v,
query := fmt.Sprintf(
`select %v, %v, %v, %v, %v, %v, %v, %v, %v, %v, %v, %v, %v, %v, %v, %v, %v, %v, %v, %v, %v,
length(replace(%v, ?, '')) - length(replace(replace(%v, ?, ''), '/', '')) as depth
from %v
where %v like ?
@@ -232,35 +231,56 @@ where %v like ?
)
and %v != 1
and not %v in ('', '.', '/', './')`,
models.HeaderColumns.Record,
models.HeaderColumns.Lastknownrecord,
models.HeaderColumns.Block,
models.HeaderColumns.Lastknownblock,
models.HeaderColumns.Deleted,
models.HeaderColumns.Typeflag,
models.HeaderColumns.Name,
models.HeaderColumns.Linkname,
models.HeaderColumns.Size,
models.HeaderColumns.Mode,
models.HeaderColumns.UID,
models.HeaderColumns.Gid,
models.HeaderColumns.Uname,
models.HeaderColumns.Gname,
models.HeaderColumns.Modtime,
models.HeaderColumns.Accesstime,
models.HeaderColumns.Changetime,
models.HeaderColumns.Devmajor,
models.HeaderColumns.Devminor,
models.HeaderColumns.Paxrecords,
models.HeaderColumns.Format,
models.HeaderColumns.Name,
models.HeaderColumns.Name,
models.TableNames.Headers,
models.HeaderColumns.Name,
models.HeaderColumns.Name,
models.HeaderColumns.Deleted,
models.HeaderColumns.Name,
),
models.HeaderColumns.Record,
models.HeaderColumns.Lastknownrecord,
models.HeaderColumns.Block,
models.HeaderColumns.Lastknownblock,
models.HeaderColumns.Deleted,
models.HeaderColumns.Typeflag,
models.HeaderColumns.Name,
models.HeaderColumns.Linkname,
models.HeaderColumns.Size,
models.HeaderColumns.Mode,
models.HeaderColumns.UID,
models.HeaderColumns.Gid,
models.HeaderColumns.Uname,
models.HeaderColumns.Gname,
models.HeaderColumns.Modtime,
models.HeaderColumns.Accesstime,
models.HeaderColumns.Changetime,
models.HeaderColumns.Devmajor,
models.HeaderColumns.Devminor,
models.HeaderColumns.Paxrecords,
models.HeaderColumns.Format,
models.HeaderColumns.Name,
models.HeaderColumns.Name,
models.TableNames.Headers,
models.HeaderColumns.Name,
models.HeaderColumns.Name,
models.HeaderColumns.Deleted,
models.HeaderColumns.Name,
)
if limit < 0 {
if err := queries.Raw(
query+`limit ?`,
prefix,
prefix,
prefix+"%",
rootDepth,
rootDepth+1,
limit+1, // +1 to accomodate the parent directory if it exists
).Bind(ctx, p.db, &headers); err != nil {
if err == sql.ErrNoRows {
return headers, nil
}
return nil, err
}
}
if err := queries.Raw(
query,
prefix,
prefix,
prefix+"%",
@@ -297,7 +317,11 @@ where %v like ?
}
}
return outhdrs, nil
if limit < 0 || len(outhdrs) < limit {
return outhdrs, nil
}
return outhdrs[:limit-1], nil
}
func (p *MetadataPersister) DeleteHeader(ctx context.Context, name string, lastknownrecord, lastknownblock int64) (*models.Header, error) {