enso/app/gui2/mock/MockFSWrapper.vue
Adam Obuchowicz de406c69fa
Automatic reconnect with Language Server. (#9691)
Fixes #8520

If the websocket is closed not by us, we automatically try to reconnect with it, and initialize the protocol again. **Restoring state (execution contexts, attached visualizations) is not part of this PR**.

It's a part of making IDE work after hibernation (or LS crash).

# Important Notes
It required somewhat heavy refactoring:
1. I decided to use an existing implementation of reconnecting websocket. Replaced (later discovered by me) our implementation.
2. The LanguageServer class now handles both reconnecting and re-initializing - that make usage of it simpler (no more `Promise<LanguageServer>` - each method will just wait for (re)connection and initialization.
3. The stuff in `net` src's module was partially moved to shared's counterpart (with tests). Merged `exponentialBackoff` implementations, which also brought me to
4. Rewriting LS client, so it returns Result instead of throwing, what is closer our desired state, and allows us using exponentialBackoff method without any wrappers.
2024-04-19 13:39:45 +00:00

98 lines
2.8 KiB
Vue

<script setup lang="ts">
import { useProjectStore } from '@/stores/project'
import { mockFsDirectoryHandle } from '@/util/convert/fsAccess'
import { MockWebSocket, type WebSocketHandler } from '@/util/net'
import { type Path as LSPath } from 'shared/languageServerTypes'
import { watchEffect } from 'vue'
import { mockDataWSHandler } from './dataServer'
const projectStore = useProjectStore()
interface FileTree {
[name: string]: FileTree | string | ArrayBuffer
}
const props = defineProps<{
files: FileTree | undefined
directory: FileSystemDirectoryHandle | undefined
/** The path of the root directory. */
prefix?: string[] | undefined
}>()
let resolveDataWsHandler: ((handler: WebSocketHandler) => void) | undefined
let dataWsHandler: Promise<WebSocketHandler> = new Promise((resolve) => {
resolveDataWsHandler = resolve
})
function setDataWsHandler(handler: WebSocketHandler) {
if (resolveDataWsHandler) {
resolveDataWsHandler(handler)
resolveDataWsHandler = undefined
} else {
dataWsHandler = Promise.resolve(handler)
}
}
MockWebSocket.addMock('data', async (data, send) => {
;(await dataWsHandler)(data, send)
})
watchEffect(async (onCleanup) => {
let maybeDirectory = props.files ? mockFsDirectoryHandle(props.files, '(root)') : props.directory
if (!maybeDirectory) return
const prefixLength = props.prefix?.length ?? 0
const directory = maybeDirectory
const ls = await projectStore.lsRpcConnection
const maybeProjectRoot = (await projectStore.contentRoots).find(
(root) => root.type === 'Project',
)?.id
if (!maybeProjectRoot) return
const projectRoot = maybeProjectRoot
async function walkFiles(
dir: FileSystemDirectoryHandle,
segments: string[],
cb: (path: LSPath) => void,
) {
for await (const [name, dirOrFile] of dir.entries()) {
const newSegments = [...segments, name]
if (dirOrFile.kind === 'directory') walkFiles(dirOrFile, newSegments, cb)
else {
cb({
rootId: projectRoot,
segments: newSegments.slice(prefixLength),
})
}
}
}
walkFiles(directory, props.prefix ?? [], (path) =>
ls.emit('file/event', [{ kind: 'Added', path }]),
)
onCleanup(() => {
walkFiles(directory, props.prefix ?? [], (path) =>
ls.emit('file/event', [{ kind: 'Removed', path }]),
)
})
setDataWsHandler(
mockDataWSHandler(async (segments) => {
segments = segments.slice(prefixLength)
if (!segments.length) return
let file
try {
let dir = directory
for (const segment of segments.slice(0, -1)) {
dir = await dir.getDirectoryHandle(segment)
}
const fileHandle = await dir.getFileHandle(segments.at(-1)!)
file = await fileHandle.getFile()
} catch {
return
}
return await file?.arrayBuffer()
}),
)
})
</script>
<template>
<slot></slot>
</template>