refactor: splits runtime up to use context

1 files changed, 7 insertions, 211 deletions

diff --git a/src/index.ts b/src/index.ts
index 34038bf..2fa1f96 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,218 +1,14 @@
-import { Project, ScriptTarget, Type, Node, 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)
-
-if (!filePath) {
-  throw new Error('Must specify runtime file')
-}
-
-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: ${ty} }`,
-      })
-    }
-  }
-  return
-}
-
-const customEffects: Record<string, (...args: Type[]) => any> = {}
-
-const evaluateType = async (effTyp: Type, node: Node): Promise<string[]> => {
-  const name = effTyp.getSymbol()?.getName()
-  // console.log(name)
-
-  return match(name, {
-    DefineEffect: async () => {
-      const [nameTyp, exprTyp] = effTyp.getTypeArguments()
-      const name = nameTyp?.getLiteralValue() as string
-      const exprStr = exprTyp?.getLiteralValue() as string
-      const func = eval(exprStr)
-
-      Object.assign(customEffects, { [name]: func })
-      return []
-    },
-
-    Print: async () => {
-      console.log(...effTyp.getTypeArguments().map(typeToString));
-      return []
-    },
-
-    PutString: async () => {
-      const [strinTyp] = effTyp.getTypeArguments()
-      const typString = typeToString(strinTyp)
-      const string = JSON.parse(!typString.startsWith('"') ? `"${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
-}
+import { createContext } from './context';
+import { evalList } from './eval';
 
 const main = async () => {
-  if (typeRefNode) {
-    const resultType = entryPoint?.getType()
-
-    if (resultType) {
-      const effects = resultType.isTuple() ? resultType.getTupleElements() : [resultType]
-      await evalList(effects, typeRefNode)
-    }
-  }
+  const ctx = createContext()
+  const resultType = ctx.entryPoint.getType()
+  const effects = resultType.isTuple() ? resultType.getTupleElements() : [resultType]
+  await evalList(ctx, effects)
 }
 
 main()
-  .then(() => {
-    // console.log(entryPoint?.print())
-    // console.log(resultTypeNode?.print())
-    rl.close()
-    process.exit(0)
-  })
+  .then(() => process.exit(0))
   .catch(e => (console.error(e), process.exit(1)))