-
Notifications
You must be signed in to change notification settings - Fork 337
/
manifest.go
138 lines (119 loc) · 3.92 KB
/
manifest.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
// Copyright 2020 The Swarm Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package manifest contains the abstractions needed for
// collection representation in Swarm.
package manifest
import (
"context"
"errors"
"github.com/ethersphere/bee/pkg/file"
"github.com/ethersphere/bee/pkg/swarm"
)
const DefaultManifestType = ManifestMantarayContentType
const (
RootPath = "/"
WebsiteIndexDocumentSuffixKey = "website-index-document"
WebsiteErrorDocumentPathKey = "website-error-document"
EntryMetadataContentTypeKey = "Content-Type"
EntryMetadataFilenameKey = "Filename"
)
var (
// ErrNotFound is returned when an Entry is not found in the manifest.
ErrNotFound = errors.New("manifest: not found")
// ErrInvalidManifestType is returned when an unknown manifest type
// is provided to the function.
ErrInvalidManifestType = errors.New("manifest: invalid type")
// ErrMissingReference is returned when the reference for the manifest file
// is missing.
ErrMissingReference = errors.New("manifest: missing reference")
)
// StoreSizeFunc is a callback on every content size that will be stored by
// the Store function.
type StoreSizeFunc func(int64) error
// Interface for operations with manifest.
type Interface interface {
// Type returns manifest implementation type information
Type() string
// Add a manifest entry to the specified path.
Add(context.Context, string, Entry) error
// Remove a manifest entry on the specified path.
Remove(context.Context, string) error
// Lookup returns a manifest entry if one is found in the specified path.
Lookup(context.Context, string) (Entry, error)
// HasPrefix tests whether the specified prefix path exists.
HasPrefix(context.Context, string) (bool, error)
// Store stores the manifest, returning the resulting address.
Store(context.Context, ...StoreSizeFunc) (swarm.Address, error)
// IterateAddresses is used to iterate over chunks addresses for
// the manifest.
IterateAddresses(context.Context, swarm.AddressIterFunc) error
}
// Entry represents a single manifest entry.
type Entry interface {
// Reference returns the address of the file.
Reference() swarm.Address
// Metadata returns the metadata of the file.
Metadata() map[string]string
}
// NewDefaultManifest creates a new manifest with default type.
func NewDefaultManifest(
ls file.LoadSaver,
encrypted bool,
) (Interface, error) {
return NewManifest(DefaultManifestType, ls, encrypted)
}
// NewDefaultManifestReference creates a new manifest with default type.
func NewDefaultManifestReference(
reference swarm.Address,
ls file.LoadSaver,
) (Interface, error) {
return NewManifestReference(DefaultManifestType, reference, ls)
}
// NewManifest creates a new manifest.
func NewManifest(
manifestType string,
ls file.LoadSaver,
encrypted bool,
) (Interface, error) {
switch manifestType {
case ManifestSimpleContentType:
return NewSimpleManifest(ls)
case ManifestMantarayContentType:
return NewMantarayManifest(ls, encrypted)
default:
return nil, ErrInvalidManifestType
}
}
// NewManifestReference loads existing manifest.
func NewManifestReference(
manifestType string,
reference swarm.Address,
ls file.LoadSaver,
) (Interface, error) {
switch manifestType {
case ManifestSimpleContentType:
return NewSimpleManifestReference(reference, ls)
case ManifestMantarayContentType:
return NewMantarayManifestReference(reference, ls)
default:
return nil, ErrInvalidManifestType
}
}
type manifestEntry struct {
reference swarm.Address
metadata map[string]string
}
// NewEntry creates a new manifest entry.
func NewEntry(reference swarm.Address, metadata map[string]string) Entry {
return &manifestEntry{
reference: reference,
metadata: metadata,
}
}
func (e *manifestEntry) Reference() swarm.Address {
return e.reference
}
func (e *manifestEntry) Metadata() map[string]string {
return e.metadata
}