81 lines
No EOL
2.5 KiB
TypeScript
81 lines
No EOL
2.5 KiB
TypeScript
// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
|
|
// See LICENSE.txt for license information.
|
|
import {Block} from '../../webapp/src/blocks/block'
|
|
|
|
interface ArchiveHeader {
|
|
version: number
|
|
date: number
|
|
}
|
|
|
|
interface ArchiveLine {
|
|
type: string,
|
|
data: unknown,
|
|
}
|
|
|
|
// This schema allows the expansion of additional line types in the future
|
|
interface BlockArchiveLine extends ArchiveLine {
|
|
type: 'block',
|
|
data: Block
|
|
}
|
|
|
|
class ArchiveUtils {
|
|
static buildBlockArchive(blocks: readonly Block[]): string {
|
|
const header: ArchiveHeader = {
|
|
version: 1,
|
|
date: Date.now(),
|
|
}
|
|
|
|
const headerString = JSON.stringify(header)
|
|
let content = headerString + '\n'
|
|
for (const block of blocks) {
|
|
const line: BlockArchiveLine = {
|
|
type: 'block',
|
|
data: block,
|
|
}
|
|
const lineString = JSON.stringify(line)
|
|
content += lineString
|
|
content += '\n'
|
|
}
|
|
|
|
return content
|
|
}
|
|
|
|
static parseBlockArchive(contents: string): Block[] {
|
|
const blocks: Block[] = []
|
|
const allLineStrings = contents.split('\n')
|
|
if (allLineStrings.length >= 2) {
|
|
const headerString = allLineStrings[0]
|
|
const header = JSON.parse(headerString) as ArchiveHeader
|
|
if (header.date && header.version >= 1) {
|
|
const lineStrings = allLineStrings.slice(1)
|
|
let lineNum = 2
|
|
for (const lineString of lineStrings) {
|
|
if (!lineString) {
|
|
// Ignore empty lines, e.g. last line
|
|
continue
|
|
}
|
|
const line = JSON.parse(lineString) as ArchiveLine
|
|
if (!line || !line.type || !line.data) {
|
|
throw new Error(`ERROR parsing line ${lineNum}`)
|
|
}
|
|
switch (line.type) {
|
|
case 'block': {
|
|
const blockLine = line as BlockArchiveLine
|
|
const block = blockLine.data
|
|
blocks.push(block)
|
|
break
|
|
}
|
|
}
|
|
|
|
lineNum += 1
|
|
}
|
|
} else {
|
|
throw new Error('ERROR parsing header')
|
|
}
|
|
}
|
|
|
|
return blocks
|
|
}
|
|
}
|
|
|
|
export {ArchiveHeader, ArchiveLine, BlockArchiveLine, ArchiveUtils} |