mirror of
https://github.com/dograh-hq/dograh.git
synced 2026-06-10 08:05:22 +02:00
00a1a22b74
* refactor: carve out extraction panel * refactor: create spec versions for node types * refactor: create a GenericNode and remove custom nodes * feat: add python and typescript sdk * add dograh sdk * fix: fetch draft workflow definition over published one * fix: fix routes of SDKs to use code gen * chore: remove doclink dependency to reduce image size * chore: format files * chore: bump pipecat * feat: let mcp fetch archived workflows on demand * chore: fix tests * feat: add sdk documentation * chore: change banner and add badge
612 lines
22 KiB
TypeScript
612 lines
22 KiB
TypeScript
// TypeScript → workflow JSON.
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//
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// Parses LLM-authored SDK code with the TypeScript compiler, walks the
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// AST statement by statement, and builds up a workflow JSON from the
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// recognized SDK patterns:
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//
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// const wf = new Workflow({ name: "..." });
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// const X = wf.addTyped(startCall({ ...fields }));
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// const Y = wf.add({ type: "endCall", ...fields });
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// wf.edge(X, Y, { label: "...", condition: "..." });
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//
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// No code is executed. Any top-level statement that doesn't match one
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// of the recognized shapes is a parse error with a file:line:col pointer
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// so the LLM can iterate. Node data is validated against the spec
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// catalog before returning.
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import ts from "typescript";
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import type {
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NodeSpec,
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ParseErrorItem,
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ParseResult,
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PropertySpec,
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WireEdge,
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WireNode,
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} from "./types.ts";
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export function parseCode(code: string, specs: NodeSpec[]): ParseResult {
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const specByName = new Map(specs.map((s) => [s.name, s]));
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const sourceFile = ts.createSourceFile(
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"workflow.ts",
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code,
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ts.ScriptTarget.ESNext,
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true,
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ts.ScriptKind.TS,
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);
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const errors: ParseErrorItem[] = [];
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const nodes: WireNode[] = [];
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const edges: WireEdge[] = [];
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const nodeRefs = new Map<string, WireNode>();
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let workflowVar: string | null = null;
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let workflowName = "";
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let nextId = 1;
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const addError = (node: ts.Node, message: string): void => {
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const pos = sourceFile.getLineAndCharacterOfPosition(node.getStart());
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errors.push({
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message,
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line: pos.line + 1,
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column: pos.character + 1,
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});
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};
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for (const stmt of sourceFile.statements) {
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if (ts.isImportDeclaration(stmt)) continue; // imports are harmless
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if (
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ts.isExportAssignment(stmt) ||
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stmt.kind === ts.SyntaxKind.EmptyStatement
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) {
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continue;
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}
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// `const X = ...;` or `wf.edge(...);`
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if (ts.isVariableStatement(stmt)) {
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handleVariableStatement(stmt);
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continue;
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}
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if (ts.isExpressionStatement(stmt)) {
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handleExpressionStatement(stmt);
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continue;
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}
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addError(
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stmt,
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`Only imports, \`const X = ...\` bindings, and \`wf.edge(...)\` calls are allowed at the top level. Found: ${ts.SyntaxKind[stmt.kind]}.`,
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);
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}
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function handleVariableStatement(stmt: ts.VariableStatement): void {
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const modifiers = ts.getModifiers(stmt);
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if (modifiers && modifiers.some((m) => m.kind === ts.SyntaxKind.ExportKeyword)) {
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addError(stmt, "`export` is not allowed on workflow bindings.");
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return;
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}
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if ((stmt.declarationList.flags & ts.NodeFlags.Const) === 0) {
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addError(stmt, "Use `const` for all bindings.");
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return;
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}
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for (const decl of stmt.declarationList.declarations) {
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if (!ts.isIdentifier(decl.name)) {
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addError(decl, "Destructuring is not allowed — use a single identifier.");
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continue;
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}
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if (!decl.initializer) {
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addError(decl, "Bindings must have an initializer.");
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continue;
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}
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const varName = decl.name.text;
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handleBinding(varName, decl.initializer, decl);
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}
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}
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function handleBinding(
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varName: string,
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initializer: ts.Expression,
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origin: ts.Node,
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): void {
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const expr = unwrapAwait(initializer);
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// `const wf = new Workflow({ name: "..." })`
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if (ts.isNewExpression(expr)) {
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if (!ts.isIdentifier(expr.expression) || expr.expression.text !== "Workflow") {
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addError(origin, "Only `new Workflow(...)` is supported for object construction.");
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return;
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}
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if (workflowVar) {
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addError(origin, `A Workflow is already bound (as \`${workflowVar}\`). Only one Workflow is allowed.`);
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return;
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}
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const args = expr.arguments ?? ts.factory.createNodeArray();
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if (args.length > 0) {
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const val = literalToJs(args[0]!, addError);
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if (
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val &&
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typeof val === "object" &&
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!Array.isArray(val) &&
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typeof (val as Record<string, unknown>)["name"] === "string"
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) {
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workflowName = (val as Record<string, unknown>)["name"] as string;
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}
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}
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workflowVar = varName;
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return;
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}
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// `const X = wf.addTyped(factory({...}))` or `wf.add({ type: "...", ... })`
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if (ts.isCallExpression(expr)) {
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const call = expr;
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const callee = call.expression;
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// Must be `wf.XYZ(...)` — property access off the workflow var
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if (
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!ts.isPropertyAccessExpression(callee) ||
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!ts.isIdentifier(callee.expression) ||
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(workflowVar !== null && callee.expression.text !== workflowVar)
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) {
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addError(
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origin,
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`Expected \`${workflowVar ?? "wf"}.addTyped(...)\` or \`${workflowVar ?? "wf"}.add(...)\`.`,
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);
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return;
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}
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if (!workflowVar) {
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addError(origin, "Workflow must be constructed before adding nodes.");
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return;
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}
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const method = callee.name.text;
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if (method === "addTyped") {
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handleAddTyped(varName, call, origin);
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} else if (method === "add") {
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handleAddGeneric(varName, call, origin);
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} else {
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addError(
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origin,
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`Unsupported method \`${method}\`. Use \`addTyped\` or \`add\`.`,
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);
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}
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return;
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}
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addError(
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origin,
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"Only `new Workflow(...)`, `wf.addTyped(...)`, and `wf.add(...)` are allowed as binding initializers.",
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);
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}
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function handleAddTyped(
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varName: string,
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call: ts.CallExpression,
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origin: ts.Node,
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): void {
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if (call.arguments.length < 1 || call.arguments.length > 2) {
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addError(origin, "`addTyped` takes 1 or 2 arguments.");
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return;
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}
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const inner = call.arguments[0]!;
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if (!ts.isCallExpression(inner) || !ts.isIdentifier(inner.expression)) {
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addError(
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origin,
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"`addTyped` must be called with a factory invocation, e.g. `addTyped(startCall({ ... }))`.",
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);
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return;
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}
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const factoryName = inner.expression.text;
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if (!specByName.has(factoryName)) {
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addError(
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origin,
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`Unknown node type: \`${factoryName}\`. Check the list of registered node types.`,
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);
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return;
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}
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const factoryArgs = inner.arguments;
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let data: Record<string, unknown> = {};
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if (factoryArgs.length > 0) {
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const parsed = literalToJs(factoryArgs[0]!, addError);
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if (parsed !== undefined) {
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if (typeof parsed !== "object" || parsed === null || Array.isArray(parsed)) {
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addError(inner, "Factory argument must be an object literal.");
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return;
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}
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data = parsed as Record<string, unknown>;
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}
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}
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// Optional position arg
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const position = extractPositionArg(call.arguments[1], addError);
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bindNode(varName, factoryName, data, position, origin);
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}
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function handleAddGeneric(
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varName: string,
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call: ts.CallExpression,
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origin: ts.Node,
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): void {
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if (call.arguments.length !== 1) {
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addError(origin, "`add` takes exactly 1 object argument.");
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return;
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}
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const parsed = literalToJs(call.arguments[0]!, addError);
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if (parsed === undefined) return;
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if (typeof parsed !== "object" || parsed === null || Array.isArray(parsed)) {
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addError(origin, "`add` argument must be an object literal.");
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return;
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}
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const obj = parsed as Record<string, unknown>;
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const typeValue = obj["type"];
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if (typeof typeValue !== "string") {
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addError(origin, "`add({ type, ... })` requires a string `type` field.");
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return;
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}
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if (!specByName.has(typeValue)) {
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addError(origin, `Unknown node type: \`${typeValue}\`.`);
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return;
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}
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let position: { x: number; y: number } | undefined;
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if (obj["position"] !== undefined) {
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const p = obj["position"];
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if (
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Array.isArray(p) &&
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p.length === 2 &&
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typeof p[0] === "number" &&
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typeof p[1] === "number"
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) {
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position = { x: p[0], y: p[1] };
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} else {
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addError(
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origin,
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"`position` must be a [x, y] tuple of numbers.",
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);
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return;
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}
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}
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const { type: _ignored, position: _ignored2, ...rest } = obj;
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bindNode(varName, typeValue, rest, position, origin);
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}
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function bindNode(
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varName: string,
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type: string,
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data: Record<string, unknown>,
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position: { x: number; y: number } | undefined,
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origin: ts.Node,
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): void {
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if (nodeRefs.has(varName)) {
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addError(origin, `Variable \`${varName}\` is already bound.`);
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return;
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}
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const node: WireNode = {
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id: String(nextId++),
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type,
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position: position ?? { x: 0, y: 0 },
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data,
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};
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nodes.push(node);
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nodeRefs.set(varName, node);
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}
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function handleExpressionStatement(stmt: ts.ExpressionStatement): void {
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const expr = unwrapAwait(stmt.expression);
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if (!ts.isCallExpression(expr)) {
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addError(stmt, "Only `wf.edge(...)` calls are allowed as bare statements.");
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return;
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}
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const callee = expr.expression;
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if (
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!ts.isPropertyAccessExpression(callee) ||
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!ts.isIdentifier(callee.expression) ||
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(workflowVar !== null && callee.expression.text !== workflowVar) ||
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callee.name.text !== "edge"
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) {
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addError(stmt, "Only `wf.edge(source, target, opts)` is allowed as a bare statement.");
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return;
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}
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if (expr.arguments.length !== 3) {
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addError(stmt, "`edge` takes exactly 3 arguments: (source, target, opts).");
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return;
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}
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const [srcArg, tgtArg, optsArg] = expr.arguments;
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if (!ts.isIdentifier(srcArg!) || !ts.isIdentifier(tgtArg!)) {
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addError(stmt, "`edge` source and target must be variable identifiers bound by `addTyped`/`add`.");
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return;
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}
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const src = nodeRefs.get(srcArg.text);
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const tgt = nodeRefs.get(tgtArg.text);
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if (!src) {
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addError(srcArg, `Unknown node variable: \`${srcArg.text}\`.`);
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return;
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}
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if (!tgt) {
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addError(tgtArg, `Unknown node variable: \`${tgtArg.text}\`.`);
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return;
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}
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const opts = literalToJs(optsArg!, addError);
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if (opts === undefined) return;
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if (typeof opts !== "object" || opts === null || Array.isArray(opts)) {
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addError(stmt, "`edge` options must be an object literal.");
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return;
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}
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const optsObj = opts as Record<string, unknown>;
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if (typeof optsObj["label"] !== "string" || (optsObj["label"] as string).trim() === "") {
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addError(stmt, "`edge` requires a non-empty `label` string.");
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return;
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}
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if (typeof optsObj["condition"] !== "string" || (optsObj["condition"] as string).trim() === "") {
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addError(stmt, "`edge` requires a non-empty `condition` string.");
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return;
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}
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edges.push({
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id: `${src.id}-${tgt.id}`,
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source: src.id,
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target: tgt.id,
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data: optsObj,
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});
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}
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// ── terminate early on parse errors ──────────────────────────────
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if (errors.length > 0) {
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return { ok: false, stage: "parse", errors };
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}
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if (!workflowVar) {
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return {
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ok: false,
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stage: "parse",
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errors: [
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{
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message:
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"No Workflow construction found. Expected `const wf = new Workflow({ name: \"...\" });`.",
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},
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],
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};
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}
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// ── spec-driven node validation ─────────────────────────────────
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const validationErrors: ParseErrorItem[] = [];
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for (const node of nodes) {
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const spec = specByName.get(node.type)!;
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const validated = validateNodeData(
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spec,
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node.data,
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(msg) => validationErrors.push({ message: `[${node.type}] ${msg}` }),
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);
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if (validated !== null) node.data = validated;
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}
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if (validationErrors.length > 0) {
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return { ok: false, stage: "validate", errors: validationErrors };
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}
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return {
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ok: true,
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workflow: {
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nodes,
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edges,
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viewport: { x: 0, y: 0, zoom: 1 },
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},
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workflowName,
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};
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}
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// ─── helpers ──────────────────────────────────────────────────────────
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function unwrapAwait(expr: ts.Expression): ts.Expression {
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return ts.isAwaitExpression(expr) ? expr.expression : expr;
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}
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function extractPositionArg(
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arg: ts.Expression | undefined,
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addError: (n: ts.Node, m: string) => void,
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): { x: number; y: number } | undefined {
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if (!arg) return undefined;
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const parsed = literalToJs(arg, addError);
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if (parsed === undefined || parsed === null) return undefined;
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if (
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typeof parsed === "object" &&
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!Array.isArray(parsed) &&
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Array.isArray((parsed as Record<string, unknown>)["position"])
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) {
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const p = (parsed as Record<string, unknown>)["position"] as unknown[];
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if (p.length === 2 && typeof p[0] === "number" && typeof p[1] === "number") {
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return { x: p[0], y: p[1] };
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}
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}
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addError(arg, "Optional second arg must be `{ position: [x, y] }`.");
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return undefined;
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}
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// Convert an expression to a plain JS value. Accepts: string, number,
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// boolean, null, undefined (→ undefined), array/object literals of the
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// same. Rejects any expression with runtime semantics (identifiers other
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// than `true/false/null/undefined`, function calls, arrow fns, etc.).
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function literalToJs(
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expr: ts.Expression,
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addError: (n: ts.Node, m: string) => void,
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): unknown {
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if (ts.isStringLiteral(expr) || ts.isNoSubstitutionTemplateLiteral(expr)) {
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return expr.text;
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}
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if (ts.isNumericLiteral(expr)) return Number(expr.text);
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if (expr.kind === ts.SyntaxKind.TrueKeyword) return true;
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if (expr.kind === ts.SyntaxKind.FalseKeyword) return false;
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if (expr.kind === ts.SyntaxKind.NullKeyword) return null;
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if (ts.isIdentifier(expr) && expr.text === "undefined") return undefined;
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if (ts.isPrefixUnaryExpression(expr)) {
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if (expr.operator === ts.SyntaxKind.MinusToken) {
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const inner = literalToJs(expr.operand, addError);
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if (typeof inner === "number") return -inner;
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}
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if (expr.operator === ts.SyntaxKind.PlusToken) {
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const inner = literalToJs(expr.operand, addError);
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if (typeof inner === "number") return inner;
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}
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addError(expr, "Unsupported unary operator; only numeric negation is allowed.");
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return undefined;
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}
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if (ts.isArrayLiteralExpression(expr)) {
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const out: unknown[] = [];
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for (const el of expr.elements) {
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if (el.kind === ts.SyntaxKind.OmittedExpression) {
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addError(el, "Sparse arrays are not allowed.");
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return undefined;
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}
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if (ts.isSpreadElement(el)) {
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addError(el, "Spread elements are not allowed in array literals.");
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return undefined;
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}
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const v = literalToJs(el, addError);
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if (v === undefined && el.kind !== ts.SyntaxKind.Identifier) {
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return undefined;
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}
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out.push(v);
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}
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return out;
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}
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if (ts.isObjectLiteralExpression(expr)) {
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const out: Record<string, unknown> = {};
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for (const prop of expr.properties) {
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if (!ts.isPropertyAssignment(prop)) {
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addError(prop, "Only plain `key: value` properties are allowed (no methods, shorthand, spread, or computed keys).");
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return undefined;
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}
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let key: string;
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if (ts.isIdentifier(prop.name) || ts.isStringLiteral(prop.name)) {
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key = prop.name.text;
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} else {
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addError(prop.name, "Property keys must be identifiers or string literals.");
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return undefined;
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}
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const val = literalToJs(prop.initializer, addError);
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if (val === undefined && prop.initializer.kind !== ts.SyntaxKind.Identifier) {
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// treat explicit `undefined` as omission
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continue;
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}
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out[key] = val;
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}
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return out;
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}
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if (ts.isTemplateExpression(expr)) {
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addError(expr, "Template literals with interpolation are not allowed — use plain strings.");
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return undefined;
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}
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addError(expr, `Unsupported expression (${ts.SyntaxKind[expr.kind]}). Only literals are allowed in data positions.`);
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return undefined;
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}
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// Spec-driven validation, mirrors the shape of
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// `sdk/python/src/dograh_sdk/_validation.py` but lightweight — applies
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// defaults for missing optionals, catches unknown keys, enforces `options`
|
|
// membership, and type-shapes the scalar and `fixed_collection` cases.
|
|
function validateNodeData(
|
|
spec: NodeSpec,
|
|
data: Record<string, unknown>,
|
|
addError: (message: string) => void,
|
|
): Record<string, unknown> | null {
|
|
const out: Record<string, unknown> = {};
|
|
const known = new Map<string, PropertySpec>();
|
|
for (const p of spec.properties ?? []) known.set(p.name, p);
|
|
|
|
for (const key of Object.keys(data)) {
|
|
if (!known.has(key)) {
|
|
addError(`Unknown field: \`${key}\`.`);
|
|
return null;
|
|
}
|
|
}
|
|
|
|
for (const [key, prop] of known) {
|
|
if (key in data) {
|
|
out[key] = data[key];
|
|
} else if (prop.default !== undefined && prop.default !== null) {
|
|
out[key] = prop.default;
|
|
} else if (prop.required) {
|
|
addError(`Missing required field: \`${key}\`.`);
|
|
return null;
|
|
}
|
|
}
|
|
|
|
for (const [key, prop] of known) {
|
|
if (!(key in out)) continue;
|
|
const value = out[key];
|
|
const err = checkPropertyShape(prop, value);
|
|
if (err) {
|
|
addError(`Field \`${key}\`: ${err}`);
|
|
return null;
|
|
}
|
|
}
|
|
|
|
return out;
|
|
}
|
|
|
|
function checkPropertyShape(prop: PropertySpec, value: unknown): string | null {
|
|
switch (prop.type) {
|
|
case "string":
|
|
case "mention_textarea":
|
|
case "url":
|
|
case "recording_ref":
|
|
case "credential_ref":
|
|
if (typeof value !== "string") return `expected string, got ${jsTypeOf(value)}.`;
|
|
return null;
|
|
case "number":
|
|
if (typeof value !== "number") return `expected number, got ${jsTypeOf(value)}.`;
|
|
return null;
|
|
case "boolean":
|
|
if (typeof value !== "boolean") return `expected boolean, got ${jsTypeOf(value)}.`;
|
|
return null;
|
|
case "tool_refs":
|
|
case "document_refs":
|
|
case "multi_options":
|
|
if (!Array.isArray(value)) return `expected array, got ${jsTypeOf(value)}.`;
|
|
for (const el of value) {
|
|
if (prop.type === "multi_options") {
|
|
if (!isInOptions(prop, el)) {
|
|
return `value \`${JSON.stringify(el)}\` is not in the allowed options.`;
|
|
}
|
|
} else if (typeof el !== "string") {
|
|
return `array elements must be strings.`;
|
|
}
|
|
}
|
|
return null;
|
|
case "options":
|
|
if (!isInOptions(prop, value)) {
|
|
return `value \`${JSON.stringify(value)}\` is not in the allowed options.`;
|
|
}
|
|
return null;
|
|
case "json":
|
|
if (typeof value !== "object" || value === null || Array.isArray(value)) {
|
|
return `expected JSON object, got ${jsTypeOf(value)}.`;
|
|
}
|
|
return null;
|
|
case "fixed_collection":
|
|
if (!Array.isArray(value)) return `expected array of rows, got ${jsTypeOf(value)}.`;
|
|
for (let i = 0; i < value.length; i++) {
|
|
const row = value[i];
|
|
if (typeof row !== "object" || row === null || Array.isArray(row)) {
|
|
return `row ${i}: expected object, got ${jsTypeOf(row)}.`;
|
|
}
|
|
for (const sub of prop.properties ?? []) {
|
|
const subVal = (row as Record<string, unknown>)[sub.name];
|
|
if (subVal === undefined) {
|
|
if (sub.required && (sub.default === undefined || sub.default === null)) {
|
|
return `row ${i}: missing required field \`${sub.name}\`.`;
|
|
}
|
|
continue;
|
|
}
|
|
const subErr = checkPropertyShape(sub, subVal);
|
|
if (subErr) return `row ${i}, \`${sub.name}\`: ${subErr}`;
|
|
}
|
|
}
|
|
return null;
|
|
default:
|
|
return null; // Unknown types pass — forward compat.
|
|
}
|
|
}
|
|
|
|
function isInOptions(prop: PropertySpec, value: unknown): boolean {
|
|
if (!prop.options) return true;
|
|
return prop.options.some((o) => o.value === value);
|
|
}
|
|
|
|
function jsTypeOf(v: unknown): string {
|
|
if (v === null) return "null";
|
|
if (Array.isArray(v)) return "array";
|
|
return typeof v;
|
|
}
|