Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 | import { CID, FileContent } from '../../ipfs'
import { Links, UpdateCallback } from '../types'
import { Maybe } from '../../common'
import { TreeInfo, TreeHeader, PutDetails } from '../protocol/public/types'
import BaseTree from '../base/tree'
import BareTree from '../bare/tree'
import PublicFile from './PublicFile'
import PublicHistory from './PublicHistory'
import * as check from '../types/check'
import * as history from './PublicHistory'
import * as link from '../link'
import * as metadata from '../metadata'
import * as pathUtil from '../path'
import * as protocol from '../protocol'
import * as skeleton from '../protocol/public/skeleton'
type ConstructorParams = {
cid: Maybe<CID>
links: Links
header: TreeHeader
}
type Child =
PublicFile | PublicTree | BareTree
export class PublicTree extends BaseTree {
children: { [name: string]: Child }
cid: Maybe<CID>
links: Links
header: TreeHeader
history: PublicHistory
constructor({ links, header, cid }: ConstructorParams) {
super(header.metadata.version)
this.children = {}
this.cid = cid
this.links = links
this.header = header
this.history = new PublicHistory(this as unknown as history.Node)
}
static async empty (): Promise<PublicTree> {
return new PublicTree({
links: {},
header: {
metadata: metadata.empty(false),
skeleton: {},
},
cid: null
})
}
static async fromCID (cid: CID): Promise<PublicTree> {
const info = await protocol.pub.get(cid)
if(!check.isTreeInfo(info)) {
throw new Error(`Could not parse a valid public tree at: ${cid}`)
}
return PublicTree.fromInfo(info, cid)
}
static async fromInfo(info: TreeInfo, cid: CID): Promise<PublicTree> {
const { userland, metadata, previous, skeleton } = info
const links = await protocol.basic.getLinks(userland)
return new PublicTree({
links,
header: { metadata, previous, skeleton },
cid
})
}
static instanceOf(obj: any): obj is PublicTree {
return check.isLinks(obj.links) && check.isTreeHeader(obj.header)
}
async createChildTree(name: string, onUpdate: Maybe<UpdateCallback>): Promise<PublicTree> {
const child = await PublicTree.empty()
const existing = this.children[name]
if (existing) {
if (PublicFile.instanceOf(existing)) {
throw new Error(`There is a file at the given path: ${name}`)
} else if (!PublicTree.instanceOf(existing)) {
throw new Error(`Not a public tree at the given path: ${name}`)
} else {
return existing
}
}
await this.updateDirectChild(child, name, onUpdate)
return child
}
async createOrUpdateChildFile(content: FileContent, name: string, onUpdate: Maybe<UpdateCallback>): Promise<PublicFile> {
const existing = await this.getDirectChild(name)
let file: PublicFile
if(existing === null){
file = await PublicFile.create(content)
} else if (PublicFile.instanceOf(existing)) {
file = await existing.updateContent(content)
}else {
throw new Error(`There is already a directory with that name: ${name}`)
}
await this.updateDirectChild(file, name, onUpdate)
return file
}
async putDetailed(): Promise<PutDetails> {
const details = await protocol.pub.putTree(
this.links,
this.header.skeleton,
this.header.metadata,
this.cid
)
this.header.previous = this.cid || undefined
this.cid = details.cid
return details
}
async updateDirectChild(child: PublicTree | PublicFile, name: string, onUpdate: Maybe<UpdateCallback>): Promise<this> {
this.children[name] = child
const details = await child.putDetailed()
this.updateLink(name, details)
onUpdate && await onUpdate()
return this
}
removeDirectChild(name: string): this {
delete this.links[name]
delete this.header.skeleton[name]
if(this.children[name]) {
delete this.children[name]
}
return this
}
async getDirectChild(name: string): Promise<Child | null> {
if(this.children[name]) {
return this.children[name]
}
const childInfo = this.header.skeleton[name] || null
if(childInfo === null) return null
const child = childInfo.isFile
? await PublicFile.fromCID(childInfo.cid)
: await PublicTree.fromCID(childInfo.cid)
// check that the child wasn't added while retrieving the content from the network
if(this.children[name]) {
return this.children[name]
}
this.children[name] = child
return child
}
async get(path: string): Promise<Child | null> {
const parts = pathUtil.splitNonEmpty(path)
if(parts === null) return this
const skeletonInfo = skeleton.getPath(this.header.skeleton, parts)
if(skeletonInfo === null) return null
const info = await protocol.pub.get(skeletonInfo.cid)
return check.isFileInfo(info)
? PublicFile.fromInfo(info, skeletonInfo.cid)
: PublicTree.fromInfo(info, skeletonInfo.cid)
}
getLinks(): Links {
// add missing metadata into links
return Object.values(this.links).reduce((acc, cur) => {
return {
...acc,
[cur.name]: {
...cur,
isFile: this.header.skeleton[cur.name]?.isFile,
}
}
}, {} as Links)
}
updateLink(name: string, result: PutDetails): this {
const { cid, metadata, userland, size, isFile, skeleton } = result
this.links[name] = link.make(name, cid, false, size)
this.header.skeleton[name] = {
cid,
metadata,
userland,
subSkeleton: skeleton,
isFile
}
this.header.metadata.unixMeta.mtime = Date.now()
return this
}
}
export default PublicTree
|