sync: actually sync everything
This commit is contained in:
binekrasik
359
src/shell/wush/Wush.ts
Normal file
359
src/shell/wush/Wush.ts
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@@ -0,0 +1,359 @@
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// Web-Uno Shell
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// the best name I could come up with lol
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import { Clear } from '../../program/Clear'
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import { Eval } from '../../program/Eval'
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import { Loadprg } from '../../program/Loadprg'
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import { Lsprg } from '../../program/Lsprg'
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import { Info } from '../../program/Info'
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import { Program } from '../../program/Program'
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import { Terminal } from '../../terminal/Terminal'
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import { EventBroadcaster } from '../../utils/EventBroadcaster'
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import { SimpleStream } from '../../utils/SimpleStream'
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import { Shell } from '../Shell'
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import { Ls } from '../../program/Ls'
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import { Item } from '../../fs/Item'
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import { Touch } from '../../program/Touch'
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import { Sl } from '../../program/Sl'
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import { Rm } from '../../program/Rm'
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import { Rl } from '../../program/Rl'
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import { ResetIndexedDb } from '../../program/ResetIndexedDb'
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import { Cat } from '../../program/Cat'
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import { Echo } from '../../program/Echo'
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import { Mkdir } from '../../program/Mkdir'
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import { Cd } from '../../program/Cd'
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// import { Pwd } from '../program/Pwd'
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// import { Cd } from '../program/Cd'
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export class Wush extends Shell {
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public readonly Version = "0.1.0"
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public readonly Name = "wush"
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// buffer
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private buffer: string[] = []
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private bufferPos: number = 0
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private history: string[] = []
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private historyPos: number = 0
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// exec stuff
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/**
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* -1 if the exec is currently running and anything else when it's not
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*/
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private execExitCode: number = 0
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// todo: workers
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// private workersAllowed: boolean = false
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// streams
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readonly stdin: SimpleStream<string>
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readonly stdout: SimpleStream<string>
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private programs: { [name: string]: Program } = {}
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private workingDirectory: Item = null as unknown as Item // workdir is initialized in Init so this should be safe
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constructor(broadcaster: EventBroadcaster, terminal: Terminal) {
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super(broadcaster, terminal)
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// create streams
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this.stdin = new SimpleStream<string>()
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this.stdout = new SimpleStream<string>()
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}
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async Init() {
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this.broadcaster.on('keydown', (key: string, isCharacter: boolean) =>
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this.HandleKeyInput(key, isCharacter),
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)
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// load workdir
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this.workingDirectory = await Item.Root()
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// load core programs
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this.programs['clear'] = new Clear()
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this.programs['eval'] = new Eval()
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this.programs['loadprg'] = new Loadprg(this)
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this.programs['lsprg'] = new Lsprg(this)
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this.programs['info'] = new Info()
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this.programs['ls'] = new Ls()
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this.programs['touch'] = new Touch()
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this.programs['sl'] = new Sl()
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this.programs['rm'] = new Rm()
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this.programs['rl'] = new Rl()
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this.programs['rsindb'] = new ResetIndexedDb()
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this.programs['cat'] = new Cat()
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this.programs['echo'] = new Echo()
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this.programs['mkdir'] = new Mkdir()
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// this.programs['pwd'] = new Pwd()
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this.programs['cd'] = new Cd(this)
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this.stdout.on(data => this.WriteEscapedString(data))
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this.Prompt()
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}
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GetPrograms(): { [name: string]: Program } {
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return this.programs
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}
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LoadProgram(program: Program, name: string) {
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this.programs[name] = program
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}
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UnloadProgram(name: string) {
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delete this.programs[name]
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}
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ExecuteProgram(name: string, args: string[]) {
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this.programs[name].Exec(this.stdin, this.stdout, this.workingDirectory, args)
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.then(code => {
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this.execExitCode = code != -1 ? code : -2
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})
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.catch((e) => {
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this.WriteEscapedString(`wush: command ${name} exited with the following exception\n`)
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this.WriteEscapedString(` | ${String(e)}\n`)
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})
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.finally(() => {
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// check if the exec actually exited with an exit code
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// and if not, set it to -2 to indicate that it didn't exit with a valid code
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if (this.execExitCode === -1)
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this.execExitCode = -2
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// this.terminal.Write(`The program exited with exit code ${this.execExitCode}.`)
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this.Prompt()
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})
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}
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Prompt() {
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this.terminal.Write(`boykisser in ${this.workingDirectory.GetPath()} -> `)
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}
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/**
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* Changes the working directory
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* @param directory the directory to enter into
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* @throws an error if the directory cannot be opened
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*/
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async SetWorkingDirectory(directory: Item) {
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if (!(await directory.Exists()) || !directory.IsDirectory())
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throw new Error(`Directory ${directory.GetPath()} doesn't exist`)
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this.workingDirectory = directory
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}
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WriteStdin(data: string) {
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this.stdin.emit(data)
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}
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WriteEscapedString(data: string) {
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let buf = data.split('')
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buf.forEach((char) => {
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if (!this.ProcessSimpleControlCode(char))
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this.terminal.Write(char)
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})
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}
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PushToBuffer(text: string) {
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text.split('').forEach(char => {
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this.buffer.splice(this.bufferPos, 0, char)
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this.bufferPos++
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})
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// console.log(this.buffer)
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}
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RemoveCharFromBuffer(amount: number, index: number) {
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this.buffer.splice(index - amount, amount)
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this.bufferPos -= amount
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// console.log(this.buffer)
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}
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MoveBufferPos(index: number, absolute: boolean = false) {
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this.bufferPos = Math.max(absolute ? index : this.bufferPos + index, 0)
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}
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FlushBuffer() {
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this.buffer = []
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this.bufferPos = 0
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}
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ExecuteBuffer() {
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// parse the buffer
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const state: {
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inString: boolean
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inHardString: boolean
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inAndOperator: boolean
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} = {
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inString: false,
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inHardString: false,
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inAndOperator: false,
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}
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const commands: {
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args: string[]
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stdin: null | SimpleStream<string>
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stdout: null | SimpleStream<string>
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}[] = []
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const textBuf =
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this.buffer
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.join('')
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.split('')
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textBuf.forEach((char, i) => {
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// spacing
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if (char === ' ' && !(state.inString || state.inHardString )) {
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if (state.args[state.args.length - 1] !== '')
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state.args.push("")
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// string ("") handling
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} else if (char === '"' && !state.inHardString) {
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state.inString = !state.inString
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// hard string ('') handling
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} else if (char === "'" && !state.inString) {
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state.inHardString = !state.inHardString
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// && operator
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} else if (char === '&' || char === '|' && !(state.inString || state.inHardString )) {
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if (state.inAndOperator) {
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if (state.args[state.args.length - 1] === '')
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state.args[state.args.length - 1] = `${char}${char}`
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else state.args.push(`${char}${char}`)
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state.args.push("")
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state.inAndOperator = false
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} else if (this.buffer[i + 1] !== char) {
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state.args[state.args.length - 1] += char
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} else state.inAndOperator = true
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// adding the char to the current argument
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} else {
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state.args[state.args.length - 1] += char
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}
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})
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this.FlushBuffer()
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console.log(`Executing ${state.args[0]} with args '${state.args}'`)
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this.execExitCode = -1
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if (this.programs[state.args[0]] instanceof Program) {
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this.ExecuteProgram(state.args[0], state.args)
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} else {
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this.execExitCode = 0
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// don't print anything if there are no arguments
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if (state.args[0].length !== 0) {
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this.terminal.Write(`wush: unknown command: ${state.args[0]}.`)
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this.terminal.MoveCursor(0, 1, { x: true, y: false })
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this.execExitCode = 127
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}
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this.Prompt()
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}
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}
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ProcessSimpleControlCode(code: string): boolean {
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switch (code) {
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case '\f':
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this.terminal.NewPage()
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return true
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case '\n':
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this.terminal.MoveCursor(0, 1, { x: true, y: false })
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return true
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default:
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return false
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}
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}
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// todo: actual processing
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ProcessAdvancedControlCode(complex: string): boolean {
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if (!complex.match(/\\(.*;)/gm))
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return false
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return true
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// const code = matches[]
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}
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HandleKeyInput(key: string, isCharacter: boolean) {
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if (this.execExitCode === -1) console.log('program running')
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if (!isCharacter) {
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switch (key) {
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case 'ArrowLeft':
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if (this.bufferPos > 0) {
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this.terminal.MoveCursor(-1, 0)
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this.MoveBufferPos(-1)
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}
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break
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case 'ArrowRight':
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if (this.bufferPos < this.buffer.length) {
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this.terminal.MoveCursor(1, 0)
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this.MoveBufferPos(1)
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}
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break
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case 'ArrowUp':
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if (this.historyPos < this.history.length) {
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if (this.historyPos === 0)
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this.history.splice(0, 0, this.buffer.join(''))
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this.historyPos++
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console.log(this.historyPos)
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console.log(this.history[this.historyPos])
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}
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break
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case 'ArrowDown':
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if (this.historyPos > 0) {
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this.historyPos--
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if (this.historyPos === 0)
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this.history.splice(0, 1)
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console.log(this.historyPos)
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console.log(this.history[this.historyPos])
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}
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break
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case 'Backspace':
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// don't erase anything if there's nothing left in the buffer
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if (this.bufferPos === 0)
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break
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this.terminal.RemoveCell()
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this.RemoveCharFromBuffer(1, this.bufferPos)
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// this.buffer.splice(this.bufferPos, 1)
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this.terminal.MoveCursor(-1, 0)
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break
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case 'Delete':
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if (this.bufferPos >= this.buffer.length || this.buffer.length <= 0)
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break
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this.bufferPos++
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this.terminal.MoveCursor(1, 0)
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this.terminal.RemoveCell()
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this.RemoveCharFromBuffer(1, this.bufferPos)
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this.terminal.MoveCursor(-1, 0)
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break
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case 'Enter':
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// send the buffer to stdin if an exec is running
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if (this.execExitCode === -1) {
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this.WriteStdin(`${this.buffer.join('')}\n`)
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this.FlushBuffer()
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} else {
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// "execute" the buffer
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this.terminal.MoveCursor(0, 1, { x: true, y: false })
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this.history.splice(0, 0, this.buffer.join(''))
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this.ExecuteBuffer()
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}
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break
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case 'F5':
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location.reload()
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break
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}
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} else {
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this.historyPos = 0
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// push the character into the buffer
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this.terminal.InsertCell(key)
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this.PushToBuffer(key)
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this.terminal.MoveCursor(1, 0)
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}
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}
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}
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