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import { Project, ScriptTarget, Type, Node, StringLiteral, TypeFormatFlags, SyntaxKind } from 'ts-morph'
import path from 'path'
import { promises as fs } from 'fs'
import readline from 'readline';
import { v4 as uuid } from 'uuid';
import { match } from './util';
const rl = readline.createInterface({
input: process.stdin,
output: process.stdout,
terminal: false
});
const readLineFromStdin = (): Promise<string> => new Promise((res) => {
rl.on('line', res)
})
const project = new Project({
compilerOptions: {
target: ScriptTarget.ES3,
},
})
const typeChecker = project.getTypeChecker()
const [filePath] = process.argv.slice(2)
const sourceFile = project.addSourceFileAtPath(path.resolve(filePath))
const entryPoint = sourceFile.getExportedDeclarations().get('main')?.[0]
const typeToString = (ty: Type | undefined): string =>
ty ? typeChecker.compilerObject.typeToString(ty.compilerType) : ''
const typeRefNode = entryPoint?.getLastChild()
const RESULT_TYPE_NAME = '__$result'
const [resultTypeNode] = sourceFile.addStatements(`type ${RESULT_TYPE_NAME} = {}`)
const addResult = (name: string, ty: string): Node | undefined => {
if (resultTypeNode.isKind(SyntaxKind.TypeAliasDeclaration)) {
const value = resultTypeNode.getChildAtIndex(3)
if (value.isKind(SyntaxKind.TypeLiteral)) {
return value.addProperty({
name: JSON.stringify(name),
type: `{ output: ${ty} }`,
})
}
}
}
const customEffects: Record<string, (...args: Type[]) => any> = {}
const evaluateType = async (effTyp: Type, node: Node): Promise<string[]> => {
const name = effTyp.getSymbol()?.getName()
// console.log(name)
return match(name, {
DefineEffect: async () => {
const [nameTyp, exprTyp] = effTyp.getTypeArguments()
const name = nameTyp.getLiteralValue() as string
const exprStr = exprTyp.getLiteralValue() as string
const func = eval(exprStr)
Object.assign(customEffects, { [name]: func })
return []
},
Print: async () => {
console.log(...effTyp.getTypeArguments().map(typeToString));
return []
},
PutString: async () => {
const [strinTyp] = effTyp.getTypeArguments()
const typString = typeToString(strinTyp)
const string = JSON.parse(!typString.startsWith('"') ? `"${typString}"` : typString)
process.stdout.write(string);
return []
},
Debug: async () => {
const [labelTyp, valueTyp] = effTyp.getTypeArguments()
const label = JSON.parse(typeToString(labelTyp))
const value = typeToString(valueTyp)
console.log(label, value)
// TODO: Return value
return []
},
ReadFile: async () => {
const [pathTyp] = effTyp.getTypeArguments()
const filePath = JSON.parse(typeToString(pathTyp))
const contents = await fs.readFile(filePath, 'utf-8')
const hash = uuid()
addResult(hash, JSON.stringify(contents))
return [hash]
},
WriteFile: async () => {
const [pathTyp, contentsTyp] = effTyp.getTypeArguments()
const filePath = JSON.parse(typeToString(pathTyp))
const contents = JSON.parse(typeToString(contentsTyp))
await fs.writeFile(filePath, contents)
return []
},
Bind: async () => {
const [inputTyp, chainToKind] = effTyp.getTypeArguments()
const [resultKey] = inputTyp ? await evaluateType(inputTyp, node) : []
const hash = uuid()
const compNode = addResult(hash,
`(${typeToString(chainToKind)} & { input: ${RESULT_TYPE_NAME}[${JSON.stringify(resultKey)}]['output'] })['return']`)
const compTyp = compNode?.getType().getProperty('output')?.getTypeAtLocation(node)
return compTyp ? await evaluateType(compTyp, node) : []
},
GetEnv: async () => {
const [envTyp] = effTyp.getTypeArguments()
const envName = JSON.parse(typeToString(envTyp))
const hash = uuid()
addResult(hash, `${JSON.stringify(process.env[envName] ?? '')}`)
return [hash]
},
GetArgs: async () => {
const hash = uuid()
addResult(hash, `${JSON.stringify(process.argv.slice(2))}`)
return [hash]
},
ReadLine: async () => {
const line = await readLineFromStdin()
const hash = uuid()
addResult(hash, `${JSON.stringify(line)}`)
return [hash]
},
JsExpr: async () => {
const [exprTyp] = effTyp.getTypeArguments()
const exprStr = JSON.parse(typeToString(exprTyp))
const result = eval(`JSON.stringify(${exprStr})`)
const hash = uuid()
addResult(hash, `${result}`)
return [hash]
},
Seq: async () => {
const [effectTyps] = effTyp.getTypeArguments()
const effectResults = await evalList(effectTyps?.getTupleElements() ?? [], node)
const hash = uuid()
addResult(hash, `[
${effectResults.map(r => `${RESULT_TYPE_NAME}[${JSON.stringify(r)}]`).join(', ')}
]`)
return [hash]
},
Do: async () => {
const [effectTyps] = effTyp.getTypeArguments()
const effectResults = await evalList(effectTyps?.getTupleElements() ?? [], node)
const resultKey = effectResults[effectResults.length - 1]
const hash = uuid()
addResult(hash, `${RESULT_TYPE_NAME}[${JSON.stringify(resultKey)}]['output']`)
return [hash]
},
_: async () => {
if (name && customEffects[name]) {
const out = await customEffects[name](...effTyp.getTypeArguments())
if (out) {
const hash = uuid()
addResult(hash, `${JSON.stringify(out)}`)
return [hash]
}
} else {
console.log(`${name} result effect is unhandled`)
}
return []
},
})
}
const evalList = async (effectTyps: Type[], node: Node) => {
const effectResults: string[] = []
for (const item of effectTyps ?? []) {
effectResults.push(...(await evaluateType(item, node)))
}
return effectResults
}
const main = async () => {
if (typeRefNode) {
const resultType = entryPoint?.getType()
if (resultType) {
const effects = resultType.isTuple() ? resultType.getTupleElements() : [resultType]
await evalList(effects, typeRefNode)
}
}
}
main()
.then(() => {
// console.log(entryPoint?.print())
// console.log(resultTypeNode?.print())
rl.close()
process.exit(0)
})
.catch(e => (console.error(e), process.exit(1)))
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