mirror of https://github.com/vbatts/imgsrv.git
71 lines
1.9 KiB
Go
71 lines
1.9 KiB
Go
package dbutil
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import (
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"io"
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"github.com/vbatts/imgsrv/types"
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)
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// Handles are all the register backing Handlers
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var Handles = map[string]Handler{}
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// Handler is the means of getting "files" from the backing database
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type Handler interface {
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Init(config []byte, err error) error
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Close() error
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Open(filename string) (File, error)
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Create(filename string) (File, error)
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Remove(filename string) error
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//HasFileByMd5(md5 string) (exists bool, err error)
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//HasFileByKeyword(keyword string) (exists bool, err error)
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HasFileByFilename(filename string) (exists bool, err error)
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FindFilesByKeyword(keyword string) (files []types.File, err error)
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FindFilesByMd5(md5 string) (files []types.File, err error)
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FindFilesByPatt(filenamePat string) (files []types.File, err error)
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CountFiles(filename string) (int, error)
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GetFiles(limit int) (files []types.File, err error)
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GetFileByFilename(filename string) (types.File, error)
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GetExtensions() (kp []types.IdCount, err error)
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GetKeywords() (kp []types.IdCount, err error)
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}
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// File is what is stored and fetched from the backing database
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type File interface {
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io.Reader
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io.Writer
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io.Closer
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MetaDataer
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}
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// MetaDataer allows set/get for optional metadata
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type MetaDataer interface {
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/*
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GetMeta unmarshals the optional "metadata" field associated with the file into
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the result parameter. The meaning of keys under that field is user-defined. For
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example:
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result := struct{ INode int }{}
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err = file.GetMeta(&result)
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if err != nil {
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panic(err.String())
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}
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fmt.Printf("inode: %d\n", result.INode)
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*/
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GetMeta(result interface{}) (err error)
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/*
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SetMeta changes the optional "metadata" field associated with the file. The
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meaning of keys under that field is user-defined. For example:
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file.SetMeta(bson.M{"inode": inode})
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It is a runtime error to call this function when the file is not open for
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writing.
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*/
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SetMeta(metadata interface{})
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}
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