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pbakaus_impeccable/tests/live-e2e/agent.mjs
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/**
* Agent module for the live-mode E2E test suite.
*
* Two layers:
*
* 1. `runAgentLoop(opts)` — the deterministic wrapper around the live-mode
* poll/wrap/write/accept protocol. This is identical for fake and real
* agents; only the variant-content production step differs.
*
* 2. `createFakeAgent()` — produces canned variants in the EXACT format
* `skill/reference/live.md` describes: a colocated
* `<style data-impeccable-css="ID">` block with `@scope ([data-impeccable-variant="N"])`
* rules, a `data-impeccable-params` JSON manifest covering range + steps + toggle
* kinds across the variant set, single top-level element per variant matching
* the original tag.
*
* A future LLM-backed agent slots in by implementing the same LiveAgent
* interface: `generateVariants(event, context)` for picks, optional
* `handleSteer(event, context)` for page-level Steer bar messages, and
* optional `applyManualEdits(event, context)` for Manual Apply.
*/
import fs from 'node:fs/promises';
import path from 'node:path';
import { readFileSync, readdirSync } from 'node:fs';
import { join } from 'node:path';
import { execFile } from 'node:child_process';
import { promisify } from 'node:util';
import { completionTypeForAcceptResult } from '../../skill/scripts/live/completion.mjs';
const execFileP = promisify(execFile);
export const STEER_MARKER_ATTR = 'data-impeccable-steer';
export const STEER_MARKER_VALUE = 'e2e';
// ---------------------------------------------------------------------------
// Variant-output schema
// ---------------------------------------------------------------------------
/**
* @typedef {Object} ParamSpec
* @property {string} id
* @property {'range' | 'steps' | 'toggle'} kind
* @property {string} label
* @property {*} default
* @property {number=} min
* @property {number=} max
* @property {number=} step
* @property {Array<{value: string, label: string}>=} options
*
* @typedef {Object} VariantSpec
* @property {string} innerHtml Single top-level element matching the
* original's tag (e.g. '<h1 ...>...</h1>').
* @property {ParamSpec[]=} params Optional 0-4 param manifest.
*
* @typedef {Object} GenerateOutput
* @property {string} scopedCss Contents of the <style data-impeccable-css>
* block — `@scope` rules per variant.
* @property {VariantSpec[]} variants
*
* @typedef {Object} ManualEditApplyOutput
* @property {'done' | 'partial' | 'error'} status
* @property {string[]=} appliedEntryIds
* @property {Array<{entryId: string, reason: string, candidates?: object[]}>=} failed
* @property {string[]=} files
* @property {string[]=} notes
*
* @typedef {Object} SteerOutput
* @property {string=} message Optional short toast forwarded in steer_done.
*
* @typedef {Object} LiveAgent
* @property {(event: object, context: object) => Promise<GenerateOutput>} generateVariants
* @property {(event: object, context: object) => Promise<SteerOutput>} [handleSteer]
* @property {(event: object, context: object) => Promise<ManualEditApplyOutput>} [applyManualEdits]
*/
// ---------------------------------------------------------------------------
// Fake agent — canned, format-faithful variants
// ---------------------------------------------------------------------------
/**
* Build a fake agent that produces deterministic variants for an `<h1 class="hero-title">`
* target. The exact CSS values are chosen so the test can later assert them
* via `getComputedStyle` — variant 1 → red, variant 2 → bold, variant 3 → uppercase.
*
* The output mirrors a real agent's write-back faithfully:
* - <style data-impeccable-css="ID"> with @scope rules per variant
* - data-impeccable-params manifest with range + steps + toggle kinds
* - first variant visible (no display:none), rest hidden by the agent caller
* - inner content = single <h1> per variant
*/
export function createFakeAgent() {
return {
/** @type {LiveAgent['generateVariants']} */
async generateVariants(event, context = {}) {
if (event.mode === 'insert') {
return generateInsertFakeVariants(context);
}
const text = event.element?.textContent?.trim() || extractText(event.element?.outerHTML) || 'Title';
const tag = (event.element?.tagName || 'h1').toLowerCase();
const cls = (event.element?.classes || ['hero-title'])
.filter((name) => !/^svelte-[\w-]+$/.test(name))
.join(' ')
|| 'hero-title';
const preservedAttrs = buildPreservedVariantAttrs(event.element || {}, cls);
const elementOpen = `<${tag}${preservedAttrs}>`;
const elementClose = `</${tag}>`;
const variantHtml = `${elementOpen}${htmlEscape(text)}${elementClose}`;
const useAstroGlobalCss = context.wrapInfo?.styleMode === 'astro-global-prefixed';
// Variant 1 — red color, with a `range` param tuning hue lightness.
const variant1 = {
innerHtml: variantHtml,
params: [
{
id: 'lightness',
kind: 'range',
min: 0.3,
max: 0.7,
step: 0.05,
default: 0.5,
label: 'Lightness',
},
],
};
// Variant 2 — bold weight, with a `steps` param for serif/sans/mono.
const variant2 = {
innerHtml: variantHtml,
params: [
{
id: 'face',
kind: 'steps',
default: 'sans',
label: 'Face',
options: [
{ value: 'sans', label: 'Sans' },
{ value: 'serif', label: 'Serif' },
{ value: 'mono', label: 'Mono' },
],
},
],
};
// Variant 3 — uppercase, with a `toggle` param for italic.
const variant3 = {
innerHtml: variantHtml,
params: [
{
id: 'italic',
kind: 'toggle',
default: false,
label: 'Italic',
},
],
};
// Scoped CSS for most frameworks. Astro component styles are transformed
// and scoped by the compiler, so live preview CSS must use a global style
// tag plus explicit variant prefixes instead of raw @scope rules.
const scopedCss = useAstroGlobalCss
? [
`[data-impeccable-variant="1"] > ${tag} {`,
' color: oklch(var(--p-lightness, 0.5) 0.25 25);',
'}',
`[data-impeccable-variant="2"] > ${tag} { font-weight: 900; }`,
`[data-impeccable-variant="2"][data-p-face="serif"] > ${tag} { font-family: ui-serif, serif; }`,
`[data-impeccable-variant="2"][data-p-face="mono"] > ${tag} { font-family: ui-monospace, monospace; }`,
`[data-impeccable-variant="3"] > ${tag} { text-transform: uppercase; letter-spacing: 0.04em; }`,
`[data-impeccable-variant="3"][data-p-italic] > ${tag} { font-style: italic; }`,
].join('\n')
: [
'@scope ([data-impeccable-variant="1"]) {',
` :scope > ${tag} {`,
' color: oklch(var(--p-lightness, 0.5) 0.25 25);',
' }',
'}',
'@scope ([data-impeccable-variant="2"]) {',
` :scope > ${tag} { font-weight: 900; }`,
` :scope[data-p-face="serif"] > ${tag} { font-family: ui-serif, serif; }`,
` :scope[data-p-face="mono"] > ${tag} { font-family: ui-monospace, monospace; }`,
'}',
'@scope ([data-impeccable-variant="3"]) {',
` :scope > ${tag} { text-transform: uppercase; letter-spacing: 0.04em; }`,
` :scope[data-p-italic] > ${tag} { font-style: italic; }`,
'}',
].join('\n');
return {
scopedCss,
variants: [variant1, variant2, variant3],
};
},
/** @type {LiveAgent['applyManualEdits']} */
async applyManualEdits(event, context = {}) {
const batch = await loadManualEditEventBatch(event, { tmp: context.tmp });
return applyManualEditBatchToSource(batch, { tmp: context.tmp, repair: event.repair || null });
},
/** @type {LiveAgent['handleSteer']} */
async handleSteer(_event, context) {
await handleSteerDeterministic(context);
return { message: 'Hero marked' };
},
};
}
function generateInsertFakeVariants(context = {}) {
const useAstroGlobalCss = context.wrapInfo?.styleMode === 'astro-global-prefixed';
const variant1 = {
innerHtml: '<div class="inserted-strip"><p class="inserted-copy">Insert variant one</p></div>',
params: [
{
id: 'lightness',
kind: 'range',
min: 0.3,
max: 0.7,
step: 0.05,
default: 0.5,
label: 'Lightness',
},
],
};
const variant2 = {
innerHtml: '<div class="inserted-strip"><p class="inserted-copy">Insert variant two</p></div>',
params: [
{
id: 'face',
kind: 'steps',
default: 'sans',
label: 'Face',
options: [
{ value: 'sans', label: 'Sans' },
{ value: 'serif', label: 'Serif' },
{ value: 'mono', label: 'Mono' },
],
},
],
};
const variant3 = {
innerHtml: '<div class="inserted-strip"><p class="inserted-copy">Insert variant three</p></div>',
params: [
{
id: 'italic',
kind: 'toggle',
default: false,
label: 'Italic',
},
],
};
const scopedCss = useAstroGlobalCss
? [
'[data-impeccable-variant="1"] .inserted-copy {',
' color: oklch(var(--p-lightness, 0.5) 0.25 25);',
'}',
'[data-impeccable-variant="2"] .inserted-copy { font-weight: 900; }',
'[data-impeccable-variant="2"][data-p-face="serif"] .inserted-copy { font-family: ui-serif, serif; }',
'[data-impeccable-variant="2"][data-p-face="mono"] .inserted-copy { font-family: ui-monospace, monospace; }',
'[data-impeccable-variant="3"] .inserted-copy { text-transform: uppercase; letter-spacing: 0.04em; }',
'[data-impeccable-variant="3"][data-p-italic] .inserted-copy { font-style: italic; }',
].join('\n')
: [
'@scope ([data-impeccable-variant="1"]) {',
' :scope .inserted-copy {',
' color: oklch(var(--p-lightness, 0.5) 0.25 25);',
' }',
'}',
'@scope ([data-impeccable-variant="2"]) {',
' :scope .inserted-copy { font-weight: 900; }',
' :scope[data-p-face="serif"] .inserted-copy { font-family: ui-serif, serif; }',
' :scope[data-p-face="mono"] .inserted-copy { font-family: ui-monospace, monospace; }',
'}',
'@scope ([data-impeccable-variant="3"]) {',
' :scope .inserted-copy { text-transform: uppercase; letter-spacing: 0.04em; }',
' :scope[data-p-italic] .inserted-copy { font-style: italic; }',
'}',
].join('\n');
return {
scopedCss,
variants: [variant1, variant2, variant3],
};
}
export function insertTargetFromEvent(event) {
const anchor = event?.insert?.anchor || {};
const classes = Array.isArray(anchor.classes)
? anchor.classes.join(' ')
: (anchor.classes || '');
const text = typeof anchor.textContent === 'string'
? anchor.textContent.trim().slice(0, 80)
: '';
return {
position: event?.insert?.position === 'before' ? 'before' : 'after',
classes: classes || undefined,
tag: anchor.tagName || anchor.tag || undefined,
elementId: anchor.id || anchor.elementId || undefined,
text: text || undefined,
};
}
// ---------------------------------------------------------------------------
// Helpers
// ---------------------------------------------------------------------------
function extractText(outerHTML) {
if (!outerHTML) return null;
const m = outerHTML.match(/>([^<]+)</);
return m ? m[1].trim() : null;
}
function htmlEscape(str) {
return String(str)
.replace(/&/g, '&amp;')
.replace(/</g, '&lt;')
.replace(/>/g, '&gt;');
}
function htmlAttrEscape(str) {
return htmlEscape(str).replace(/"/g, '&quot;');
}
function buildPreservedVariantAttrs(element, className) {
const attrs = [];
if (className) attrs.push(['class', className]);
if (element.id) attrs.push(['id', element.id]);
const testId = readAttrFromOuterHtml(element.outerHTML, 'data-testid');
if (testId) attrs.push(['data-testid', testId]);
return attrs.map(([name, value]) => ` ${name}="${htmlAttrEscape(value)}"`).join('');
}
function readAttrFromOuterHtml(outerHTML, attr) {
if (!outerHTML) return null;
const match = String(outerHTML).match(new RegExp("\\s" + attr.replace(/[.*+?^${}()|[\]\\]/g, '\\$&') + "\\s*=\\s*([\"'])(.*?)\\1"));
return match ? match[2] : null;
}
function attrEscape(str, { svelte = false } = {}) {
let s = String(str).replace(/&/g, '&amp;').replace(/'/g, '&apos;');
if (svelte) {
// Svelte parses `{` in attribute values as expression starters even
// inside quoted strings — see https://svelte.dev/e/expected_token .
// Escape with HTML numeric entities so the literal characters land in
// the rendered DOM attribute.
s = s.replace(/\{/g, '&#123;').replace(/\}/g, '&#125;');
}
return s;
}
/**
* Translate an HTML snippet to JSX. The fake and LLM agents write innerHtml
* in HTML form; the orchestrator translates per the target file's syntax.
*/
export function htmlToJsx(html) {
return selfCloseHtmlVoidTagsForJsx(String(html)
.replace(/(^|[\s<])class=/g, '$1className=')
.replace(/\sstyle=(["'])([\s\S]*?)\1/g, (_match, _quote, value) => {
const entries = parseInlineStyle(value);
if (entries.length === 0) return '';
return ' style={{ ' + entries.map(({ prop, value }) => `${formatJsxStyleKey(prop)}: ${JSON.stringify(value)}`).join(', ') + ' }}';
}));
}
const JSX_VOID_TAGS = new Set([
'area', 'base', 'br', 'col', 'embed', 'hr', 'img', 'input', 'link', 'meta',
'param', 'source', 'track', 'wbr',
]);
function selfCloseHtmlVoidTagsForJsx(html) {
let result = '';
let index = 0;
while (index < html.length) {
const lt = html.indexOf('<', index);
if (lt === -1) {
result += html.slice(index);
break;
}
result += html.slice(index, lt);
const tagMatch = html.slice(lt + 1).match(/^([A-Za-z][\w:-]*)/);
if (!tagMatch) {
result += '<';
index = lt + 1;
continue;
}
const tagName = tagMatch[1];
let end = lt + 1 + tagName.length;
let quote = null;
while (end < html.length) {
const ch = html[end];
if (quote) {
if (ch === quote) quote = null;
} else if (ch === '"' || ch === "'") {
quote = ch;
} else if (ch === '>') {
break;
}
end++;
}
if (end >= html.length) {
result += html.slice(lt);
break;
}
const tag = html.slice(lt, end + 1);
if (!JSX_VOID_TAGS.has(tagName.toLowerCase()) || /\/\s*>$/.test(tag)) {
result += tag;
} else {
result += html.slice(lt, end).replace(/\s+$/, '') + ' />';
}
index = end + 1;
}
return result;
}
function parseInlineStyle(style) {
return splitInlineStyleDeclarations(String(style))
.map((decl) => decl.trim())
.filter(Boolean)
.map(parseInlineStyleDeclaration)
.filter(Boolean);
}
function splitInlineStyleDeclarations(style) {
const declarations = [];
let quote = null;
let escaped = false;
let parenDepth = 0;
let start = 0;
for (let i = 0; i < style.length; i++) {
const ch = style[i];
if (escaped) {
escaped = false;
continue;
}
if (ch === '\\') {
escaped = true;
continue;
}
if (quote) {
if (ch === quote) quote = null;
continue;
}
if (ch === '"' || ch === "'") {
quote = ch;
continue;
}
if (ch === '(') {
parenDepth++;
continue;
}
if (ch === ')' && parenDepth > 0) {
parenDepth--;
continue;
}
if (ch === ';' && parenDepth === 0) {
declarations.push(style.slice(start, i));
start = i + 1;
}
}
declarations.push(style.slice(start));
return declarations;
}
function parseInlineStyleDeclaration(decl) {
const colon = decl.indexOf(':');
if (colon <= 0) return null;
const prop = decl.slice(0, colon).trim();
const value = decl.slice(colon + 1).trim();
if (!prop || !value) return null;
return { prop, value };
}
function formatJsxStyleKey(prop) {
if (prop.startsWith('--')) return JSON.stringify(prop);
const reactKey = cssPropertyToReactKey(prop);
return /^[A-Za-z_$][\w$]*$/.test(reactKey) ? reactKey : JSON.stringify(prop);
}
function cssPropertyToReactKey(prop) {
const lower = prop.toLowerCase();
if (lower.startsWith('-webkit-')) return 'Webkit' + capitalize(camelCaseCssProperty(lower.slice(8)));
if (lower.startsWith('-moz-')) return 'Moz' + capitalize(camelCaseCssProperty(lower.slice(5)));
if (lower.startsWith('-o-')) return 'O' + capitalize(camelCaseCssProperty(lower.slice(3)));
if (lower.startsWith('-ms-')) return 'ms' + camelCaseCssProperty(lower.slice(4));
if (lower === 'float') return 'cssFloat';
return camelCaseCssProperty(prop);
}
function camelCaseCssProperty(prop) {
return prop.replace(/-([a-z])/gi, (_match, ch) => ch.toUpperCase());
}
function capitalize(str) {
return str ? str[0].toUpperCase() + str.slice(1) : str;
}
export const HOIST_ATTR = 'data-impeccable-hoist-id';
export function normalizeVariantOutput(output, wrapInfo = {}) {
const scopedCssInput = output.scopedCss || '';
const normalizedInputCss = normalizeVariantSelectorQuotes(scopedCssInput);
const extraCss = [];
const variants = output.variants.map((variant, i) => {
const { innerHtml, groups } = stripInlineStylesPerElement(String(variant.innerHtml));
for (const { hoistId, declarations } of groups) {
extraCss.push(renderHoistedInlineStyleRule({
variantId: i + 1,
hoistId,
declarations,
styleMode: wrapInfo.styleMode,
}));
}
return { ...variant, innerHtml };
});
const baseCss = renderMissingBaseVariantRules({
scopedCss: normalizedInputCss,
count: output.variants.length,
styleMode: wrapInfo.styleMode,
});
if (extraCss.length === 0 && baseCss.length === 0 && normalizedInputCss === scopedCssInput) return output;
const scopedCss = [normalizedInputCss, ...extraCss, ...baseCss]
.map((chunk) => String(chunk).trim())
.filter(Boolean)
.join('\n');
return { ...output, scopedCss, variants };
}
function normalizeVariantSelectorQuotes(css) {
return String(css).replace(
/\[data-impeccable-variant=(['"])(\d+)\1\]/g,
(_match, _quote, id) => `[data-impeccable-variant="${id}"]`,
);
}
export async function applyManualEditBatchToSource(batch, { tmp, sourceEdits, repair = null } = {}) {
if (!tmp) throw new Error('manual edit apply requires tmp project root');
const fileCache = new Map();
const filesTouched = new Set();
const appliedEntryIds = [];
const failed = [];
const sourceEditQueue = Array.isArray(sourceEdits) ? [...sourceEdits] : null;
const allowAlreadyApplied = !!repair;
const readRelativeFile = async (relativeFile) => {
if (fileCache.has(relativeFile)) return fileCache.get(relativeFile);
const full = safeProjectPath(tmp, relativeFile);
const body = await fs.readFile(full, 'utf-8');
fileCache.set(relativeFile, body);
return body;
};
for (const entry of batch?.entries || []) {
const beforeEntry = new Map(fileCache);
const beforeTouched = new Set(filesTouched);
const keyRenames = sourceKeyRenamesForEntry(entry);
const entrySourceEdits = sourceEditQueue
? sourceEditQueue.filter((edit) => edit.entryId === entry.id)
: null;
let entryFailed = null;
if (sourceEditQueue) {
if (entrySourceEdits.length === 0) {
entryFailed = { reason: 'no source edits returned', candidates: candidatesForEntry(batch, entry.id) };
}
for (const edit of entrySourceEdits) {
if (entryFailed) break;
const relativeFile = normalizeRelativeSourceFile(edit.file);
if (!relativeFile) {
entryFailed = { reason: 'invalid source edit file', candidates: candidatesForEntry(batch, entry.id) };
break;
}
try {
const body = await readRelativeFile(relativeFile);
const replaced = replaceTextInSource(body, {
originalText: edit.originalText,
newText: edit.newText,
line: edit.line,
contextHints: contextHintsForEntry(entry),
});
if (!replaced.ok) {
if (allowAlreadyApplied && sourceAlreadyShowsAppliedOp(body, {
file: relativeFile,
line: edit.line,
}, edit)) {
filesTouched.add(relativeFile);
continue;
}
entryFailed = { reason: replaced.reason, candidates: candidatesForEntry(batch, entry.id) };
break;
}
fileCache.set(relativeFile, replaced.body);
filesTouched.add(relativeFile);
} catch (err) {
entryFailed = { reason: err.message, candidates: candidatesForEntry(batch, entry.id) };
break;
}
}
} else {
for (const op of entry.ops || []) {
const attempts = candidateAttemptsForOp(batch, entry, op);
let opApplied = false;
let lastReason = 'originalText not found';
for (const attempt of attempts) {
try {
const body = await readRelativeFile(attempt.file);
const replaced = replaceTextInSource(body, {
originalText: op.originalText,
newText: op.newText,
line: attempt.line,
contextHints: contextHintsForEntry(entry),
keyRenames,
});
if (!replaced.ok) {
if (allowAlreadyApplied && sourceAlreadyShowsAppliedOp(body, attempt, op)) {
filesTouched.add(attempt.file);
opApplied = true;
break;
}
lastReason = replaced.reason;
continue;
}
fileCache.set(attempt.file, replaced.body);
filesTouched.add(attempt.file);
opApplied = true;
break;
} catch (err) {
lastReason = err.message;
}
}
if (!opApplied) {
entryFailed = { reason: lastReason, candidates: candidatesForEntry(batch, entry.id) };
break;
}
}
}
if (entryFailed) {
fileCache.clear();
for (const [file, body] of beforeEntry) fileCache.set(file, body);
filesTouched.clear();
for (const file of beforeTouched) filesTouched.add(file);
failed.push({ entryId: entry.id, ...entryFailed });
} else {
await applyCoupledSourceKeyRenamesForEntry({
batch,
entry,
keyRenames,
readRelativeFile,
fileCache,
filesTouched,
});
appliedEntryIds.push(entry.id);
}
}
for (const file of filesTouched) {
await fs.writeFile(safeProjectPath(tmp, file), fileCache.get(file), 'utf-8');
}
const status = failed.length === 0 ? 'done' : (appliedEntryIds.length > 0 ? 'partial' : 'error');
return {
status,
appliedEntryIds,
failed,
files: [...filesTouched],
notes: [],
};
}
export async function loadManualEditEventBatch(event, { tmp } = {}) {
if (!event?.evidencePath) return event?.batch;
const evidencePath = await resolveManualEditEvidencePath(event.evidencePath, tmp);
const body = await fs.readFile(evidencePath, 'utf-8');
const batch = JSON.parse(body);
return batch && typeof batch === 'object' && Array.isArray(batch.entries) ? batch : event.batch;
}
async function resolveManualEditEvidencePath(evidencePath, root) {
if (!evidencePath || typeof evidencePath !== 'string') throw new Error('invalid manual edit evidence path');
const base = root ? path.resolve(root) : process.cwd();
const full = path.isAbsolute(evidencePath) ? evidencePath : path.resolve(base, evidencePath);
const [realBase, realFull] = await Promise.all([
fs.realpath(base).catch(() => base),
fs.realpath(full).catch(() => full),
]);
const rel = path.relative(realBase, realFull);
if (!rel || rel.startsWith('..') || path.isAbsolute(rel)) {
throw new Error('manual edit evidence path outside fixture project');
}
return full;
}
function safeProjectPath(root, relativeFile) {
const normalized = normalizeRelativeSourceFile(relativeFile);
if (!normalized) throw new Error('invalid source file path');
const full = path.resolve(root, normalized);
const rel = path.relative(path.resolve(root), full);
if (!rel || rel.startsWith('..') || path.isAbsolute(rel)) {
throw new Error('source file outside fixture project');
}
return full;
}
function normalizeRelativeSourceFile(file) {
if (!file || typeof file !== 'string') return null;
if (path.isAbsolute(file)) return null;
const normalized = path.normalize(file).replace(/\\/g, '/');
if (!normalized || normalized === '.' || normalized.startsWith('../')) return null;
return normalized;
}
function candidateAttemptsForOp(batch, entry, op) {
const attempts = [];
const seen = new Set();
const numericDisplayEdit = /^-?\d+(?:\.\d+)?$/.test(String(op?.originalText || '').trim())
&& !/^-?\d+(?:\.\d+)?$/.test(String(op?.newText || '').trim());
const add = (file, line, kind) => {
const relativeFile = normalizeRelativeSourceFile(file);
if (!relativeFile) return;
const key = `${relativeFile}:${line || ''}:${kind}`;
if (seen.has(key)) return;
seen.add(key);
attempts.push({ file: relativeFile, line, kind });
};
const opCandidates = (batch?.candidates || [])
.filter((candidate) => candidate.entryId === entry.id && (!candidate.ref || candidate.ref === op.ref));
const relatedSiblingRefs = relatedSiblingRefsForOp(entry, op);
const siblingCandidates = (batch?.candidates || [])
.filter((candidate) => candidate.entryId === entry.id && candidate.ref && relatedSiblingRefs.has(candidate.ref));
if (numericDisplayEdit) {
for (const candidate of [...opCandidates, ...siblingCandidates]) {
for (const match of candidate.objectKeyMatches || []) add(match.file, match.line, 'object_key_match');
}
}
add(op?.sourceHint?.file, op?.sourceHint?.line, 'source_hint');
for (const candidate of opCandidates) {
const sourceHint = candidate.sourceHint;
if (sourceHint?.status === 'ok') add(sourceHint.relativeFile || sourceHint.file, sourceHint.line, 'candidate_source_hint');
for (const match of candidate.locatorMatches || []) add(match.file, match.line, 'locator_match');
for (const match of candidate.textMatches || []) add(match.file, match.line, 'text_match');
for (const match of candidate.objectKeyMatches || []) add(match.file, match.line, 'object_key_match');
for (const match of candidate.contextTextMatches || []) add(match.file, match.line, 'context_text_match');
}
return attempts;
}
function replaceTextInSource(body, { originalText, newText, line, contextHints = [], keyRenames = [] }) {
const original = String(originalText || '');
if (!original) return { ok: false, reason: 'missing originalText' };
const contextKeyValueMatch = replaceNumericValueForContextKey(body, {
originalText: original,
newText,
contextHints,
});
if (contextKeyValueMatch.ok) return contextKeyValueMatch;
if (Number.isFinite(Number(line)) && Number(line) > 0) {
const typedDisplayMatch = replaceTypedNumericDisplayExpression(body, {
originalText: original,
newText,
line: Number(line),
});
if (typedDisplayMatch.ok) return typedDisplayMatch;
const lineMatch = replaceNearLine(body, original, String(newText), Number(line), keyRenames);
if (lineMatch.ok) return lineMatch;
}
const numericDisplayEdit = isNumericDisplayEdit(original, newText);
const matches = allIndexesOf(body, original)
.filter((index) => !numericDisplayEdit || numericReplacementAllowedAt(body, index, original));
if (matches.length === 0) return { ok: false, reason: 'originalText not found' };
if (matches.length === 1) {
return replaceAtIndexWithSourceRules(body, matches[0], original, String(newText));
}
const scored = matches.map((index) => ({
index,
score: scoreManualEditMatch(body, index, contextHints),
})).sort((a, b) => b.score - a.score);
if (scored[0].score > 0 && scored[0].score > scored[1].score) {
return replaceAtIndexWithSourceRules(body, scored[0].index, original, String(newText));
}
return { ok: false, reason: 'originalText ambiguous' };
}
function replaceNumericValueForContextKey(body, { originalText, newText, contextHints = [] }) {
const original = String(originalText || '').trim();
const next = String(newText || '').trim();
if (!/^-?\d+(?:\.\d+)?$/.test(original) || !next || /^-?\d+(?:\.\d+)?$/.test(next)) {
return { ok: false, reason: 'not a context-key numeric display edit' };
}
const context = contextHints.join(' ');
if (!context) return { ok: false, reason: 'missing context for keyed numeric edit' };
const lines = String(body || '').split('\n');
const valuePattern = new RegExp(`(['"])([^'"]{2,160})\\1\\s*:\\s*${escapeRegExp(original)}(?=\\s*[,}])`);
for (let index = 0; index < lines.length; index += 1) {
const match = lines[index].match(valuePattern);
if (!match || !context.includes(match[2])) continue;
lines[index] = lines[index].slice(0, match.index)
+ match[0].replace(new RegExp(`${escapeRegExp(original)}$`), JSON.stringify(next))
+ lines[index].slice(match.index + match[0].length);
return { ok: true, body: lines.join('\n') };
}
return { ok: false, reason: 'no related keyed numeric value found' };
}
function replaceTypedNumericDisplayExpression(body, { originalText, newText, line }) {
const original = String(originalText || '').trim();
const displayText = String(newText || '');
const displayTrimmed = displayText.trim();
if (!/^-?\d+(?:\.\d+)?$/.test(original)) return { ok: false, reason: 'not a numeric display edit' };
if (!displayTrimmed || /^-?\d+(?:\.\d+)?$/.test(displayTrimmed)) {
return { ok: false, reason: 'not a typed display expansion' };
}
const lines = body.split('\n');
const lineIndex = Math.max(0, Math.min(lines.length - 1, Number(line) - 1));
const candidateIndexes = [lineIndex];
for (let i = 0; i < lines.length; i++) {
if (i !== lineIndex && /String\([^)]+\)/.test(lines[i])) candidateIndexes.push(i);
}
for (const index of candidateIndexes) {
const lineText = lines[index] || '';
const stringCall = lineText.match(/String\(([^)\n]+)\)/);
if (stringCall) {
const replacement = JSON.stringify(displayTrimmed);
lines[index] = lineText.slice(0, stringCall.index) + replacement + lineText.slice(stringCall.index + stringCall[0].length);
return { ok: true, body: lines.join('\n') };
}
const bareExpression = lineText.match(/\{[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\[['"][^'"]+['"]\])*\}/);
if (bareExpression) {
const replacement = `{${JSON.stringify(displayTrimmed)}}`;
lines[index] = lineText.slice(0, bareExpression.index) + replacement + lineText.slice(bareExpression.index + bareExpression[0].length);
return { ok: true, body: lines.join('\n') };
}
}
return { ok: false, reason: 'no typed display expression near sourceHint' };
}
function replaceNearLine(body, originalText, newText, line, keyRenames = []) {
const lines = body.split('\n');
const lineIndex = Math.max(0, Math.min(lines.length - 1, Number(line) - 1));
const indexes = [];
for (let distance = 0; distance <= 3; distance += 1) {
for (const i of distance === 0 ? [lineIndex] : [lineIndex - distance, lineIndex + distance]) {
if (i >= 0 && i < lines.length && !indexes.includes(i)) indexes.push(i);
}
}
for (const i of indexes) {
const idx = lines[i].indexOf(originalText);
if (idx === -1) continue;
if (isNumericDisplayEdit(originalText, newText) && !numericReplacementAllowedOnLine(lines[i], idx, originalText)) continue;
const replacement = sourceReplacementForLine(lines[i], originalText, newText);
lines[i] = lines[i].slice(0, idx) + replacement + lines[i].slice(idx + originalText.length);
lines[i] = applyCoupledSourceKeyRenames(lines[i], keyRenames);
return { ok: true, body: lines.join('\n') };
}
return { ok: false, reason: 'originalText not found near sourceHint' };
}
function sourceAlreadyShowsAppliedOp(body, attempt, op) {
const newText = typeof op?.newText === 'string' ? op.newText : '';
const originalText = typeof op?.originalText === 'string' ? op.originalText : '';
const lines = String(body || '').split('\n');
const lineNumber = Number(attempt?.line);
if (Number.isFinite(lineNumber) && lineNumber > 0) {
const lineIndex = Math.max(0, Math.min(lines.length - 1, lineNumber - 1));
const start = Math.max(0, lineIndex - 3);
const end = Math.min(lines.length, lineIndex + 4);
const windowLines = lines.slice(start, end);
if (newText) return windowLines.some((line) => line.includes(newText));
if (originalText) return windowLines.every((line) => !line.includes(originalText));
}
if (newText) return String(body || '').includes(newText);
if (originalText) return !String(body || '').includes(originalText);
return false;
}
function sourceKeyRenamesForEntry(entry) {
return (entry?.ops || [])
.filter((op) =>
typeof op.originalText === 'string'
&& typeof op.newText === 'string'
&& op.originalText.trim()
&& op.newText.trim()
&& op.originalText !== op.newText
&& op.originalText.length <= 120
&& op.newText.length <= 120
&& !/^-?\d+(?:\.\d+)?$/.test(op.originalText.trim())
)
.map((op) => ({ from: op.originalText, to: op.newText }));
}
function isNumericDisplayEdit(originalText, newText) {
const original = String(originalText || '').trim();
const next = String(newText || '').trim();
return /^-?\d+(?:\.\d+)?$/.test(original) && !!next && !/^-?\d+(?:\.\d+)?$/.test(next);
}
function numericReplacementAllowedAt(body, index, originalText) {
const source = String(body || '');
const lineStart = source.lastIndexOf('\n', index) + 1;
const lineEndIndex = source.indexOf('\n', index);
const lineEnd = lineEndIndex === -1 ? source.length : lineEndIndex;
return numericReplacementAllowedOnLine(
source.slice(lineStart, lineEnd),
index - lineStart,
originalText,
);
}
function numericReplacementAllowedOnLine(line, index, originalText) {
if (isInsideQuotedString(line, index)) return false;
const before = index > 0 ? line[index - 1] : '';
const after = line[index + String(originalText || '').length] || '';
if (/[A-Za-z0-9_$.-]/.test(before) || /[A-Za-z0-9_$.-]/.test(after)) return false;
return true;
}
function isInsideQuotedString(line, index) {
let quote = null;
let escaped = false;
for (let i = 0; i < index; i += 1) {
const ch = line[i];
if (escaped) {
escaped = false;
continue;
}
if (ch === '\\') {
escaped = true;
continue;
}
if (quote) {
if (ch === quote) quote = null;
continue;
}
if (ch === '"' || ch === "'" || ch === '`') quote = ch;
}
return !!quote;
}
function sourceReplacementForLine(line, originalText, newText) {
const original = escapeRegExp(String(originalText || ''));
const isPlainNumber = /^-?\d+(?:\.\d+)?$/.test(String(originalText || '').trim());
const next = String(newText || '');
const nextIsPlainNumber = /^-?\d+(?:\.\d+)?$/.test(next.trim());
if (isPlainNumber && !nextIsPlainNumber) {
const valuePattern = new RegExp(`(['\"][^'\"]+['\"]\\s*:\\s*)${original}(\\s*[,}])`);
if (valuePattern.test(line)) return JSON.stringify(next);
}
return next;
}
function applyCoupledSourceKeyRenames(line, keyRenames) {
let out = line;
for (const { from, to } of keyRenames || []) {
const escaped = escapeRegExp(from);
out = out.replace(new RegExp(`'${escaped}'(?=\\s*:)`), `'${to.replace(/'/g, "\\'")}'`);
out = out.replace(new RegExp(`"${escaped}"(?=\\s*:)`), `"${to.replace(/"/g, '\\"')}"`);
}
return out;
}
async function applyCoupledSourceKeyRenamesForEntry({
batch,
entry,
keyRenames,
readRelativeFile,
fileCache,
filesTouched,
}) {
if (!Array.isArray(keyRenames) || keyRenames.length === 0) return;
const files = new Set(filesTouched);
for (const candidate of batch?.candidates || []) {
if (candidate.entryId !== entry.id) continue;
for (const match of candidate.objectKeyMatches || []) {
const relativeFile = normalizeRelativeSourceFile(match.file);
if (relativeFile) files.add(relativeFile);
}
}
for (const file of files) {
let body;
try {
body = await readRelativeFile(file);
} catch {
continue;
}
const lines = body.split('\n');
let changed = false;
for (let index = 0; index < lines.length; index += 1) {
const next = applyCoupledSourceKeyRenames(lines[index], keyRenames);
if (next === lines[index]) continue;
lines[index] = next;
changed = true;
}
if (!changed) continue;
fileCache.set(file, lines.join('\n'));
filesTouched.add(file);
}
}
function replaceAtIndex(body, index, originalText, newText) {
return {
ok: true,
body: body.slice(0, index) + newText + body.slice(index + originalText.length),
};
}
function replaceAtIndexWithSourceRules(body, index, originalText, newText) {
const source = String(body || '');
const lineStart = source.lastIndexOf('\n', index) + 1;
const lineEndIndex = source.indexOf('\n', index);
const lineEnd = lineEndIndex === -1 ? source.length : lineEndIndex;
const line = source.slice(lineStart, lineEnd);
const replacement = sourceReplacementForLine(line, originalText, newText);
return replaceAtIndex(source, index, originalText, replacement);
}
function allIndexesOf(body, needle) {
const out = [];
let index = 0;
while (true) {
index = body.indexOf(needle, index);
if (index === -1) return out;
out.push(index);
index += Math.max(1, needle.length);
}
}
function scoreManualEditMatch(body, index, contextHints) {
const windowText = body.slice(Math.max(0, index - 600), index + 600);
let score = 0;
for (const hint of contextHints) {
if (hint && windowText.includes(hint)) score++;
}
return score;
}
function contextHintsForEntry(entry) {
const hints = [];
const add = (value) => {
const text = String(value || '').replace(/\s+/g, ' ').trim();
if (text.length >= 2 && text.length <= 180) hints.push(text);
};
for (const op of entry?.ops || []) {
for (const nearby of op.nearbyEditableTexts || []) add(typeof nearby === 'string' ? nearby : nearby?.text);
add(op.container?.textContent);
add(op.leaf?.textContent);
}
add(entry?.element?.textContent);
return [...new Set(hints)];
}
function relatedSiblingRefsForOp(entry, op) {
const context = contextHintsForSingleOp(op).join(' ');
if (!context) return new Set();
return new Set((entry?.ops || [])
.filter((sibling) => sibling.ref !== op.ref)
.filter((sibling) => {
const original = String(sibling.originalText || '').trim();
const next = String(sibling.newText || '').trim();
return (original && context.includes(original)) || (next && context.includes(next));
})
.map((sibling) => sibling.ref)
.filter(Boolean));
}
function contextHintsForSingleOp(op) {
const hints = [];
const add = (value) => {
const text = String(value || '').replace(/\s+/g, ' ').trim();
if (text.length >= 2 && text.length <= 240) hints.push(text);
};
for (const nearby of op?.nearbyEditableTexts || []) add(typeof nearby === 'string' ? nearby : nearby?.text);
add(op?.container?.textContent);
add(op?.leaf?.textContent);
return [...new Set(hints)];
}
function candidatesForEntry(batch, entryId) {
const out = [];
for (const candidate of batch?.candidates || []) {
if (candidate.entryId !== entryId) continue;
if (candidate.sourceHint?.relativeFile) {
out.push({ file: candidate.sourceHint.relativeFile, line: candidate.sourceHint.line, kind: 'candidate_source_hint' });
}
for (const key of ['textMatches', 'objectKeyMatches', 'locatorMatches', 'contextTextMatches']) {
for (const match of candidate[key] || []) {
out.push({ file: match.file, line: match.line, kind: match.kind || key });
}
}
}
return out.slice(0, 20);
}
function renderMissingBaseVariantRules({ scopedCss, count, styleMode }) {
const rules = [];
for (let i = 1; i <= count; i++) {
if (!hasBaseVariantRule(scopedCss, i, styleMode)) {
rules.push(renderBaseVariantRule(i, styleMode));
}
}
return rules;
}
function hasBaseVariantRule(scopedCss, variantId, styleMode) {
const q = String.raw`["']${variantId}["']`;
if (styleMode === 'astro-global-prefixed') {
return new RegExp(String.raw`\[data-impeccable-variant=${q}\](?:\s|>|\.|#|\[${HOIST_ATTR}=)`).test(scopedCss);
}
return new RegExp(String.raw`@scope\s*\(\s*\[data-impeccable-variant=${q}\]\s*\)`).test(scopedCss);
}
function renderBaseVariantRule(variantId, styleMode) {
if (styleMode === 'astro-global-prefixed') {
return [
`[data-impeccable-variant="${variantId}"] > * {`,
' --impeccable-variant-ready: 1;',
'}',
].join('\n');
}
return [
`@scope ([data-impeccable-variant="${variantId}"]) {`,
' :scope > * { --impeccable-variant-ready: 1; }',
'}',
].join('\n');
}
// Walk each opening tag char-by-char (respecting quotes so a literal `>`
// inside an attribute value doesn't terminate the tag early), strip any
// `style="..."`, and tag the element with `data-impeccable-hoist-id="N"`.
// The downstream rule selects on that attribute so it targets the exact
// element that was styled — never sibling tags of the same name.
function stripInlineStylesPerElement(innerHtml) {
const groups = [];
const styleRe = /\sstyle=(["'])([\s\S]*?)\1/;
let counter = 0;
let result = '';
let i = 0;
while (i < innerHtml.length) {
const lt = innerHtml.indexOf('<', i);
if (lt === -1) {
result += innerHtml.slice(i);
break;
}
result += innerHtml.slice(i, lt);
const tagMatch = innerHtml.slice(lt + 1).match(/^([A-Za-z][\w:-]*)/);
if (!tagMatch) {
// </tag>, comments, text content — copy `<` and continue.
result += '<';
i = lt + 1;
continue;
}
const tagName = tagMatch[1];
let j = lt + 1 + tagName.length;
let quote = null;
while (j < innerHtml.length) {
const ch = innerHtml[j];
if (quote) {
if (ch === quote) quote = null;
} else if (ch === '"' || ch === "'") {
quote = ch;
} else if (ch === '>') {
break;
}
j++;
}
if (j >= innerHtml.length) {
// Unterminated tag (malformed input): copy verbatim and stop.
result += innerHtml.slice(lt);
break;
}
const attrs = innerHtml.slice(lt + 1 + tagName.length, j);
const styleMatch = attrs.match(styleRe);
if (!styleMatch) {
result += innerHtml.slice(lt, j + 1);
i = j + 1;
continue;
}
const entries = parseInlineStyle(styleMatch[2]);
const strippedAttrs = attrs.replace(styleRe, '');
if (entries.length === 0) {
result += `<${tagName}${strippedAttrs}>`;
i = j + 1;
continue;
}
counter++;
const hoistId = String(counter);
groups.push({ hoistId, declarations: entries });
result += `<${tagName} ${HOIST_ATTR}="${hoistId}"${strippedAttrs}>`;
i = j + 1;
}
return { innerHtml: result, groups };
}
function renderHoistedInlineStyleRule({ variantId, hoistId, declarations, styleMode }) {
// Select on the per-element hoist attribute, not the tag name, so two
// <span>s in the same variant where only one had an inline style cannot
// both pick up the hoisted declarations.
const lines = declarations.map(({ prop, value }) => ` ${prop}: ${value};`);
const target = `[${HOIST_ATTR}="${hoistId}"]`;
if (styleMode === 'astro-global-prefixed') {
return [
`[data-impeccable-variant="${variantId}"] ${target} {`,
...lines.map((line) => line.slice(2)),
'}',
].join('\n');
}
return [
`@scope ([data-impeccable-variant="${variantId}"]) {`,
` :scope ${target} {`,
...lines,
' }',
'}',
].join('\n');
}
/**
* Render the variants block in either HTML or JSX, depending on commentSyntax.
* In JSX:
* - comments use {/* ... */} (already what commentSyntax.open is)
* - <style>{`@scope ... { ... }`}</style> wraps CSS in a template literal so JSX
* doesn't choke on the {} in CSS
* - non-default visible variants use style={{display: 'none'}}
* - inner element class= becomes className=, style="..." becomes JSX style={{ ... }}
* - data-impeccable-params stays a single-quoted JSON string (JSX-legal)
*/
function renderVariantsBlock({ sessionId, indent, output, commentSyntax, file, styleMode }) {
const isJsx = commentSyntax.open === '{/*';
const isSvelte = !!file && file.endsWith('.svelte');
const isAstroGlobalCss = styleMode === 'astro-global-prefixed';
const styleLines = isJsx
? [
indent + ' <style data-impeccable-css="' + sessionId + '">{`',
...output.scopedCss.split('\n').map((l) => indent + ' ' + l),
indent + ' `}</style>',
]
: [
indent + ' <style' + (isAstroGlobalCss ? ' is:inline' : '') + ' data-impeccable-css="' + sessionId + '">',
...output.scopedCss.split('\n').map((l) => indent + ' ' + l),
indent + ' </style>',
];
const variantBlocks = output.variants.map((v, i) => {
const idx = i + 1;
const paramsAttr = v.params && v.params.length
? " data-impeccable-params='" + attrEscape(JSON.stringify(v.params), { svelte: isSvelte }) + "'"
: '';
let styleAttr = '';
if (i !== 0) styleAttr = isJsx ? " style={{display: 'none'}}" : ' style="display: none"';
const inner = isJsx ? htmlToJsx(v.innerHtml) : v.innerHtml;
return [
indent + ' ' + commentSyntax.open + ' Variant ' + idx + ' ' + commentSyntax.close,
indent + ' <div data-impeccable-variant="' + idx + '"' + styleAttr + paramsAttr + '>',
indent + ' ' + inner,
indent + ' </div>',
].join('\n');
});
return [...styleLines, ...variantBlocks].join('\n');
}
/**
* Read the wrapped file, find the "insert below this line" marker, splice in
* the rendered variants block, write back.
*/
async function spliceVariantsIntoWrapper({ tmp, wrapInfo, sessionId, output }) {
const filePath = path.join(tmp, wrapInfo.file);
const src = await fs.readFile(filePath, 'utf-8');
const lines = src.split('\n');
// Find the "Variants: insert below this line" comment line — definitive
// marker, robust to any indentation off-by-one. Matches in any comment
// style (HTML / JSX / Astro).
const markerIdx = lines.findIndex((l) =>
l.includes('Variants: insert below this line'),
);
if (markerIdx === -1) {
throw new Error('insert marker not found in ' + wrapInfo.file);
}
const indent = (lines[markerIdx].match(/^\s*/) || [''])[0];
// Indent INSIDE the wrapper is one level shallower (the marker is indented
// 2 spaces relative to the wrapper opening). Remove the 2-space comment
// indent to get the wrapper indent.
const wrapperIndent = indent.replace(/ $/, '');
const block = renderVariantsBlock({
sessionId,
indent: wrapperIndent,
output,
commentSyntax: wrapInfo.commentSyntax,
file: wrapInfo.file,
styleMode: wrapInfo.styleMode,
});
const next = [
...lines.slice(0, markerIdx + 1),
block,
...lines.slice(markerIdx + 1),
];
await fs.writeFile(filePath, next.join('\n'), 'utf-8');
}
async function writeSvelteComponentVariants({ tmp, wrapInfo, event, output }) {
const manifestPath = path.join(tmp, wrapInfo.file);
const manifest = JSON.parse(await fs.readFile(manifestPath, 'utf-8'));
const componentDir = path.join(tmp, manifest.componentDir);
const isInsert = manifest.mode === 'insert';
const contract = Array.isArray(manifest.propContract) ? manifest.propContract : [];
const propNames = contract.map((entry) => entry.prop);
const baseMarkup = isInsert ? '' : substituteSvelteExprsWithProps(manifest.originalMarkup || '', contract).trim();
const textValues = isInsert ? [] : extractTextPieces(event.element?.outerHTML || event.element?.textContent || '');
const paramsByVariant = {};
for (let i = 0; i < output.variants.length; i++) {
const variantId = i + 1;
const variant = output.variants[i];
const tag = firstTagName(variant.innerHtml) || firstTagName(baseMarkup) || 'div';
let markup = substituteLiveTextWithProps(variant.innerHtml || '', contract, textValues).trim();
if (!isInsert && contract.length > 0 && !propNames.some((name) => markup.includes(`{${name}}`))) {
markup = mergeTopLevelAttrs(baseMarkup, variant.innerHtml || '') || baseMarkup;
}
if (isInsert && !variantMarkupHasVisibleContent(markup)) {
throw new Error(`Svelte insert variant ${variantId} has no visible content`);
}
if (isInsert && /\bdata-impeccable-[\w-]*\s*=/.test(markup)) {
throw new Error(`Svelte insert variant ${variantId} contains preview-only data-impeccable attributes`);
}
const css = svelteCssForVariant(output.scopedCss || '', variantId, tag);
const component = [
buildSveltePropsScript(contract),
'',
markup || baseMarkup || '<div></div>',
'',
'<style>',
css || ' :global(*) {}',
'</style>',
'',
].join('\n');
await fs.writeFile(path.join(componentDir, `v${variantId}.svelte`), component, 'utf-8');
paramsByVariant[String(variantId)] = Array.isArray(variant.params) ? variant.params : [];
}
await fs.writeFile(path.join(componentDir, 'params.json'), JSON.stringify(paramsByVariant, null, 2) + '\n', 'utf-8');
}
function variantMarkupHasVisibleContent(markup) {
const text = String(markup || '')
.replace(/<script[\s\S]*?<\/script>/gi, '')
.replace(/<style[\s\S]*?<\/style>/gi, '')
.replace(/<!--[\s\S]*?-->/g, '')
.replace(/<[^>]+>/g, ' ')
.replace(/\s+/g, ' ')
.trim();
if (text.length > 0) return true;
return /<(img|svg|canvas|video|audio|picture|input|button|select|textarea)\b/i.test(markup || '');
}
function buildSveltePropsScript(contract) {
if (!contract.length) return '<script>\n let {} = $props();\n</script>';
return `<script>\n let { ${contract.map((entry) => entry.prop).join(', ')} } = $props();\n</script>`;
}
function substituteSvelteExprsWithProps(markup, contract) {
let out = String(markup || '');
for (const entry of contract) {
out = out.split(`{${entry.expr}}`).join(`{${entry.prop}}`);
}
return out;
}
function substituteLiveTextWithProps(markup, contract, textValues) {
let out = String(markup || '');
for (let i = 0; i < contract.length; i++) {
const value = textValues[i];
if (!value) continue;
out = out.split(htmlEscape(value)).join(`{${contract[i].prop}}`);
out = out.split(value).join(`{${contract[i].prop}}`);
}
return out;
}
function extractTextPieces(html) {
return String(html || '')
.replace(/<script[\s\S]*?<\/script>/gi, '')
.replace(/<style[\s\S]*?<\/style>/gi, '')
.split(/<[^>]+>/)
.map((text) => text.replace(/\s+/g, ' ').trim())
.filter(Boolean);
}
function firstTagName(markup) {
const match = String(markup || '').match(/<([A-Za-z][\w:-]*)\b/);
return match ? match[1].toLowerCase() : null;
}
function mergeTopLevelAttrs(baseMarkup, variantMarkup) {
const base = String(baseMarkup || '');
const variant = String(variantMarkup || '');
const baseOpen = base.match(/^(\s*<)([A-Za-z][\w:-]*)([^>]*)(>)/);
const variantOpen = variant.match(/^\s*<([A-Za-z][\w:-]*)([^>]*)(>)/);
if (!baseOpen || !variantOpen || baseOpen[2].toLowerCase() !== variantOpen[1].toLowerCase()) return base;
return base.replace(baseOpen[0], `${baseOpen[1]}${baseOpen[2]}${variantOpen[2]}${baseOpen[4]}`);
}
function svelteCssForVariant(scopedCss, variantId, tag) {
const css = String(scopedCss || '');
const chunks = extractVariantCssChunks(css, variantId);
const rewritten = chunks
.join('\n')
.replace(new RegExp(String.raw`\\[data-impeccable-variant=["']${variantId}["']\\]\\s*>\\s*`, 'g'), '')
.replace(new RegExp(String.raw`\\[data-impeccable-variant=["']${variantId}["']\\][^{]*>\\s*`, 'g'), '')
.replace(/:scope(?:\[[^\]]+\])?\s*>\s*/g, '')
.replace(/:scope(?:\[[^\]]+\])?/g, tag)
.split('\n')
.map((line) => line.trimEnd())
.filter((line) => line.trim())
.join('\n')
.trim();
return rewritten || `${tag} {}`;
}
function extractVariantCssChunks(css, variantId) {
const lines = String(css || '').split('\n');
const chunks = [];
let collecting = false;
let depth = 0;
for (const line of lines) {
if (line.includes(`[data-impeccable-variant="${variantId}"]`) || line.includes(`[data-impeccable-variant='${variantId}']`)) {
collecting = true;
depth = 0;
if (!line.trim().startsWith('@scope')) chunks.push(line);
depth += braceDelta(line);
if (depth <= 0) collecting = false;
continue;
}
if (!collecting) continue;
const before = depth;
depth += braceDelta(line);
if (before === 1 && depth === 0 && line.trim() === '}') {
collecting = false;
continue;
}
chunks.push(line);
if (depth <= 0) collecting = false;
}
return chunks;
}
function braceDelta(line) {
return (line.match(/\{/g) || []).length - (line.match(/\}/g) || []).length;
}
// ---------------------------------------------------------------------------
// Poll loop — the "agent" runs this until aborted
// ---------------------------------------------------------------------------
/**
* @param {object} opts
* @param {string} opts.tmp Project tmp dir (cwd for live-* scripts).
* @param {string} opts.scriptsDir Path to the impeccable scripts dir.
* @param {number} opts.port live-server port.
* @param {string} opts.token live-server token.
* @param {LiveAgent} opts.agent
* @param {AbortSignal} opts.signal
* @param {(msg: string) => void} [opts.log]
* @param {object} [opts.steerSourceFile] Optional relative source path for steer edits.
* @param {object} [opts.steerTarget] Optional { classes, tag } for steer target discovery.
*/
export async function runAgentLoop({
tmp,
scriptsDir,
port,
token,
agent,
signal,
log = () => {},
wrapTarget = { classes: 'hero-title', tag: 'h1' },
steerSourceFile,
steerTarget,
}) {
const base = `http://127.0.0.1:${port}`;
while (!signal.aborted) {
let event;
try {
const res = await fetch(`${base}/poll?token=${token}&timeout=5000`, { signal });
event = await res.json();
} catch (err) {
if (signal.aborted) return;
log('poll error: ' + err.message);
await new Promise((r) => setTimeout(r, 200));
continue;
}
if (event.type === 'timeout') continue;
if (event.type === 'exit') return;
if (event.type === 'prefetch') continue;
if (event.type === 'connected') continue;
if (event.type === 'steer') {
log(`steer id=${event.id} message=${JSON.stringify(event.message)}`);
try {
const target = typeof wrapTarget === 'function' ? wrapTarget(event) : wrapTarget;
const steerCtxTarget = steerTarget || target;
const steerContext = buildSteerContext({
tmp,
event,
wrapTarget: steerCtxTarget,
sourceFile: steerSourceFile,
});
let toast = 'Hero marked';
if (typeof agent.handleSteer === 'function') {
const result = await agent.handleSteer(event, steerContext);
toast = result?.message || toast;
} else {
await handleSteerDeterministic(steerContext);
}
await fetch(`${base}/poll`, {
method: 'POST',
headers: { 'Content-Type': 'application/json' },
body: JSON.stringify({
token,
type: 'steer_done',
id: event.id,
message: toast,
file: steerContext.targetFile,
}),
signal,
});
} catch (err) {
if (signal.aborted) return;
log('steer failed: ' + err.message);
await fetch(`${base}/poll`, {
method: 'POST',
headers: { 'Content-Type': 'application/json' },
body: JSON.stringify({ token, type: 'error', id: event.id, message: err.message }),
signal,
}).catch(() => {});
}
continue;
}
if (event.type === 'generate') {
const isInsert = event.mode === 'insert';
log(`generate id=${event.id} mode=${isInsert ? 'insert' : 'replace'}${isInsert ? '' : ` action=${event.action}`} count=${event.count}`);
try {
let wrapInfo;
if (isInsert) {
const insertTarget = insertTargetFromEvent(event);
wrapInfo = await runInsert({
tmp,
scriptsDir,
id: event.id,
count: event.count,
...insertTarget,
});
} else {
// 1. Wrap the original element in the variant scaffold (deterministic CLI)
// wrapTarget can be a static {classes, tag, elementId} (test fixtures
// know what they pick) or a function (event) => target (real-use
// sessions: the agent must derive the selector from the picked
// element on the fly).
const target = typeof wrapTarget === 'function' ? wrapTarget(event) : wrapTarget;
// Pull textContent from the picker event so wrap can disambiguate
// when sibling elements share classes/tag (issue #114). Fixtures can
// still override by including `text` in their wrapTarget.
const text = target.text ?? (event.element?.textContent || '').trim();
wrapInfo = await runWrap({
tmp,
scriptsDir,
id: event.id,
count: event.count,
...target,
text,
});
}
log(`scaffolded: ${wrapInfo.file} insertLine=${wrapInfo.insertLine}`);
// 2. Agent generates variant content (LLM-pluggable seam)
let output = await agent.generateVariants(event, { wrapTarget, wrapInfo });
output = normalizeVariantOutput(output, wrapInfo);
if (output.variants.length !== event.count) {
log(`warning: agent returned ${output.variants.length} variants, expected ${event.count}`);
}
// 3. Write variants into the deterministic preview target.
if (wrapInfo.previewMode === 'svelte-component') {
await writeSvelteComponentVariants({ tmp, wrapInfo, event, output });
} else {
await spliceVariantsIntoWrapper({ tmp, wrapInfo, sessionId: event.id, output });
}
if (process.env.IMPECCABLE_E2E_DEBUG) {
const post = await fs.readFile(path.join(tmp, wrapInfo.file), 'utf-8');
log(`--- post-splice (variants written) ---\n${post}`);
}
// 4. Tell the server we're done (broadcasts SSE done → browser settles to CYCLING)
await fetch(`${base}/poll`, {
method: 'POST',
headers: { 'Content-Type': 'application/json' },
body: JSON.stringify({ token, type: 'done', id: event.id, file: wrapInfo.file }),
signal,
});
} catch (err) {
if (signal.aborted) return;
log('generate failed: ' + err.message);
await fetch(`${base}/poll`, {
method: 'POST',
headers: { 'Content-Type': 'application/json' },
body: JSON.stringify({ token, type: 'error', id: event.id, message: err.message }),
signal,
}).catch(() => {});
}
continue;
}
if (event.type === 'manual_edit_apply') {
const entryCount = event.batch?.entries?.length || 0;
const opCount = (event.batch?.entries || []).reduce((sum, entry) => sum + (entry.ops?.length || 0), 0) || entryCount;
const chunkLabel = event.chunk ? ` (chunk ${event.chunk.index}/${event.chunk.total})` : '';
const applyFiles = formatManualApplyFiles(event.batch);
log(`Applying ${opCount} staged copy edit(s)${chunkLabel} across ${applyFiles}.`);
try {
if (typeof agent.applyManualEdits !== 'function') {
throw new Error('agent does not implement applyManualEdits');
}
log("Using source hints first; I'll only touch the hinted copy.");
const result = await agent.applyManualEdits(event, { tmp, scriptsDir });
if (process.env.IMPECCABLE_E2E_DEBUG) {
log(`manual_edit_apply result: ${JSON.stringify(result)}`);
}
await runPollReply({
tmp,
scriptsDir,
id: event.id,
status: 'done',
data: result,
});
const appliedCount = result.appliedEntryIds?.length || 0;
const failedCount = result.failed?.length || Math.max(0, entryCount - appliedCount);
if (failedCount > 0) {
log(`Applied ${appliedCount}/${entryCount} edit(s); ${failedCount} stayed staged because ${result.failed?.[0]?.reason || 'one or more entries failed'}.`);
} else if (event.chunk) {
const finalChunk = event.chunk.index === event.chunk.total;
log(`Applied ${appliedCount}/${entryCount} entry(s) for chunk ${event.chunk.index}/${event.chunk.total}; ${finalChunk ? 'waiting for server verification.' : 'polling for the next Apply chunk.'}`);
} else {
log(`Applied ${appliedCount}/${entryCount} edit(s) and cleared the Apply stash.`);
}
} catch (err) {
if (signal.aborted) return;
log('manual_edit_apply failed: ' + err.message);
const failedEntries = (event.batch?.entries || []).map((entry) => ({
entryId: entry.id,
reason: err.message || 'manual_edit_apply_failed',
candidates: [],
})).filter((item) => item.entryId);
await runPollReply({
tmp,
scriptsDir,
id: event.id,
status: 'done',
data: {
status: 'error',
appliedEntryIds: [],
failed: failedEntries,
files: [],
notes: [],
message: err.message,
},
}).catch(() => {});
}
continue;
}
if (event.type === 'accept') {
log(`accept id=${event.id} variantId=${event.variantId}`);
try {
const acceptResult = await runAccept({
tmp,
scriptsDir,
id: event.id,
variant: event.variantId,
paramValues: event.paramValues,
pageUrl: event.pageUrl,
});
// Carbonize cleanup — required after accept per the live skill spec.
// For the fake agent, we perform a faithful but minimal cleanup:
// delete the carbonize block (markers + dead variants + inline <style>
// + param-values comment) and unwrap the temporary variant div around
// the accepted content. A real LLM agent would additionally migrate
// the @scope rules into the project's stylesheet — out of scope for
// a deterministic test.
if (acceptResult.handled === true && acceptResult.carbonize === true && acceptResult.file) {
if (process.env.IMPECCABLE_E2E_DEBUG) {
const post = await fs.readFile(path.join(tmp, acceptResult.file), 'utf-8');
log(`--- post-accept (pre-carbonize) ---\n${post}`);
}
await runCarbonizeCleanup({ tmp, file: acceptResult.file, sessionId: event.id, variant: event.variantId });
log(`carbonize cleanup done on ${acceptResult.file}`);
}
const completionType = completionTypeForAcceptResult('accept', acceptResult);
await fetch(`${base}/poll`, {
method: 'POST',
headers: { 'Content-Type': 'application/json' },
body: JSON.stringify({
token,
type: completionType,
id: event.id,
file: acceptResult.file,
message: acceptResult.error,
data: acceptResult.carbonize === true ? { carbonize: true, _acceptResult: acceptResult } : { _acceptResult: acceptResult },
}),
signal,
});
if (completionType === 'agent_done' && acceptResult.handled === true && acceptResult.carbonize === true) {
await runLiveComplete({ tmp, scriptsDir, id: event.id });
log(`completed carbonize session ${event.id}`);
}
} catch (err) {
if (signal.aborted) return;
log('accept failed: ' + err.message);
}
continue;
}
if (event.type === 'discard') {
log(`discard id=${event.id}`);
try {
const discardResult = await runAccept({ tmp, scriptsDir, id: event.id, discard: true, pageUrl: event.pageUrl });
const completionType = completionTypeForAcceptResult('discard', discardResult);
await fetch(`${base}/poll`, {
method: 'POST',
headers: { 'Content-Type': 'application/json' },
body: JSON.stringify({
token,
type: completionType,
id: event.id,
file: discardResult.file,
message: discardResult.error,
data: { _acceptResult: discardResult },
}),
signal,
});
} catch (err) {
if (signal.aborted) return;
log('discard failed: ' + err.message);
}
continue;
}
log(`unhandled event: ${event.type}`);
}
}
async function runPollReply({ tmp, scriptsDir, id, status, message, data }) {
const args = [path.join(scriptsDir, 'live-poll.mjs'), '--reply', id, status];
if (data !== undefined) args.push('--data', JSON.stringify(data));
if (message) args.push(message);
await execFileP(process.execPath, args, { cwd: tmp });
}
function formatManualApplyFiles(batch) {
const files = new Set();
for (const entry of batch?.entries || []) {
for (const op of entry.ops || []) {
if (op.sourceHint?.file) files.add(op.sourceHint.file);
}
}
for (const candidate of batch?.candidates || []) {
if (candidate.file) files.add(candidate.file);
}
return files.size > 0 ? [...files].slice(0, 3).join(', ') : 'source files';
}
const SOURCE_EXTS = new Set(['.html', '.jsx', '.tsx', '.svelte', '.astro', '.vue']);
const SOURCE_SKIP = new Set(['node_modules', '.git', '.svelte-kit', 'dist', '.vite', 'build', '.next']);
/**
* Locate the source file the fake steer handler would edit (for assertions).
* @param {string} tmp
* @param {{ classes?: string, tag?: string }=} target
*/
export function findSteerTargetFile(tmp, target = { classes: 'hero-title', tag: 'h1' }) {
const file = findSteerTargetFileSync(tmp, target);
if (!file) {
throw new Error('Could not locate steer target file under ' + tmp);
}
return file;
}
/**
* Context passed to agent.handleSteer (fake + LLM).
* @param {{ tmp: string, event: object, wrapTarget: object, sourceFile?: string }} opts
*/
export function buildSteerContext({ tmp, event, wrapTarget, sourceFile }) {
const target = wrapTarget || { classes: 'hero-title', tag: 'h1' };
const targetFileAbs = sourceFile
? path.join(tmp, sourceFile)
: findSteerTargetFile(tmp, target);
const targetFile = path.relative(tmp, targetFileAbs);
const source = readFileSync(targetFileAbs, 'utf-8');
const tag = target.tag || 'h1';
const classToken = (target.classes || 'hero-title').split(/\s+/)[0];
const tagLine = source.split('\n').find((line) =>
new RegExp(`<${tag}\\b`, 'i').test(line) && line.includes(classToken),
);
return {
tmp,
target,
targetFile,
targetFileAbs,
pageUrl: event.pageUrl,
tagLine: tagLine || null,
sourceExcerpt: source.split('\n').slice(0, 60).join('\n'),
requiredMarker: `${STEER_MARKER_ATTR}="${STEER_MARKER_VALUE}"`,
};
}
/**
* Apply one or more exact find/replace edits inside the staged fixture tree.
* @param {string} tmp
* @param {{ file: string, edits: Array<{ find: string, replace: string }> }} payload
*/
export async function applySteerEdits(tmp, { file, edits }) {
if (!file || typeof file !== 'string') throw new Error('steer edits: file required');
if (!Array.isArray(edits) || edits.length === 0) throw new Error('steer edits: edits array required');
const abs = path.isAbsolute(file) ? file : path.join(tmp, file);
const root = path.resolve(tmp);
if (!path.resolve(abs).startsWith(root + path.sep) && path.resolve(abs) !== root) {
throw new Error('steer edits: path escapes fixture root');
}
let body = await fs.readFile(abs, 'utf-8');
for (const [i, edit] of edits.entries()) {
if (!edit || typeof edit.find !== 'string' || typeof edit.replace !== 'string') {
throw new Error(`steer edits[${i}]: find and replace must be strings`);
}
if (!body.includes(edit.find)) {
throw new Error(`steer edits[${i}]: find string not found in ${file}`);
}
body = body.replace(edit.find, edit.replace);
}
await fs.writeFile(abs, body, 'utf-8');
}
async function handleSteerDeterministic(context) {
const { targetFileAbs, target } = context;
let body = await fs.readFile(targetFileAbs, 'utf-8');
const next = addSteerMarkerToSource(body, target);
if (next === body) return;
if (!next) {
const { classes = 'hero-title', tag = 'h1' } = target;
const classToken = classes.split(/\s+/)[0];
throw new Error(`steer target <${tag}.${classToken}> not found in ${targetFileAbs}`);
}
body = next;
await fs.writeFile(targetFileAbs, body, 'utf-8');
}
export function addSteerMarkerToSource(body, target = { classes: 'hero-title', tag: 'h1' }) {
const attr = `${STEER_MARKER_ATTR}="${STEER_MARKER_VALUE}"`;
if (body.includes(attr)) return body;
const { classes = 'hero-title', tag = 'h1' } = target;
const classToken = classes.split(/\s+/)[0];
const escapedTag = escapeRegExp(tag);
const escapedClass = escapeRegExp(classToken);
const classValue = `(?:["'][^"']*\\b${escapedClass}\\b[^"']*["']|\\{[^}]*\\b${escapedClass}\\b[^}]*\\})`;
const openTagRe = new RegExp(
`(<${escapedTag}\\b(?=[^>]*\\b(?:className|class)\\s*=\\s*${classValue})[^>]*)(>)`,
'i',
);
if (!openTagRe.test(body)) return null;
return body.replace(openTagRe, `$1 ${attr}$2`);
}
function findSteerTargetFileSync(tmp, target) {
const { classes = 'hero-title', tag = 'h1' } = target;
const classNeedle = classes.split(/\s+/)[0];
const stack = [tmp];
while (stack.length) {
const dir = stack.pop();
let entries;
try { entries = readdirSync(dir, { withFileTypes: true }); } catch { continue; }
for (const entry of entries) {
const full = join(dir, entry.name);
if (entry.isDirectory()) {
if (!SOURCE_SKIP.has(entry.name)) stack.push(full);
continue;
}
const ext = path.extname(entry.name);
if (!SOURCE_EXTS.has(ext)) continue;
let body;
try { body = readFileSync(full, 'utf-8'); } catch { continue; }
if (!body.includes(classNeedle)) continue;
if (!new RegExp(`<${tag}\\b`, 'i').test(body)) continue;
return full;
}
}
return null;
}
async function runWrap({ tmp, scriptsDir, id, count, classes, tag, elementId, text, pageUrl }) {
const args = [path.join(scriptsDir, 'live-wrap.mjs'), '--id', id, '--count', String(count)];
if (elementId) args.push('--element-id', elementId);
if (classes) args.push('--classes', classes);
if (tag) args.push('--tag', tag);
if (text) args.push('--text', text);
if (pageUrl) args.push('--page-url', pageUrl);
const { stdout } = await execFileP(process.execPath, args, { cwd: tmp });
const last = stdout.trim().split('\n').filter(Boolean).pop();
return JSON.parse(last);
}
async function runInsert({ tmp, scriptsDir, id, count, position, classes, tag, elementId, text }) {
const args = [
path.join(scriptsDir, 'live-insert.mjs'),
'--id', id,
'--count', String(count),
'--position', position,
];
if (elementId) args.push('--element-id', elementId);
if (classes) args.push('--classes', classes);
if (tag) args.push('--tag', tag);
if (text) args.push('--text', text);
const { stdout } = await execFileP(process.execPath, args, { cwd: tmp });
const last = stdout.trim().split('\n').filter(Boolean).pop();
return JSON.parse(last);
}
/**
* Apply the post-accept carbonize cleanup to the given file. Mirrors the
* five-step rewrite the live skill expects of the agent:
*
* 1. Locate the carbonize block (bracketed by `impeccable-carbonize-start`
* and `impeccable-carbonize-end`).
* 2. Step 2 ("move CSS into the project stylesheet") is skipped — that
* requires per-project judgment about which file owns these styles.
* The fake agent leaves CSS migration to the LLM-backed agent.
* 3-5. Strip the carbonize block entirely AND unwrap the temporary
* `<div data-impeccable-variant="N" style="display: contents"|...>` wrapper
* that holds the accepted content. The accepted inner element survives.
*/
async function runCarbonizeCleanup({ tmp, file, sessionId /* , variant */ }) {
const filePath = path.join(tmp, file);
let body = await fs.readFile(filePath, 'utf-8');
// 1. Strip the carbonize block. We match either comment style so this
// works for both HTML and JSX targets.
const startRe = new RegExp('[ \\t]*(?:<!--|\\{/\\*)\\s*impeccable-carbonize-start\\s+' + sessionId + '\\s*(?:-->|\\*/\\})\\n');
const endRe = new RegExp('[ \\t]*(?:<!--|\\{/\\*)\\s*impeccable-carbonize-end\\s+' + sessionId + '\\s*(?:-->|\\*/\\})\\n?');
const startMatch = body.match(startRe);
const endMatch = body.match(endRe);
if (startMatch && endMatch && startMatch.index < endMatch.index) {
const startIdx = startMatch.index;
const endIdx = endMatch.index + endMatch[0].length;
body = body.slice(0, startIdx) + body.slice(endIdx);
}
// 2. Unwrap the temporary `<div data-impeccable-variant="N" ...>` placed
// around the accepted content. For JSX targets, live-accept also adds an
// outer `<div data-impeccable-carbonize>` so the carbonize block and accepted
// node occupy one child slot; strip that shell after the accepted node is
// clean.
body = unwrapDivAttributeWrapper(body, 'data-impeccable-variant', { expandSingleLineContainer: true });
body = unwrapDivAttributeWrapper(body, 'data-impeccable-carbonize');
// 3. Strip any `data-impeccable-hoist-id` attributes the normalize step
// may have injected when the model emitted inline styles. The hoisted
// CSS already migrated into the project stylesheet (real agent) or was
// dropped with the carbonize block (fake agent); the attribute on the
// element is now dead weight.
body = body.replace(/\s+data-impeccable-hoist-id="[^"]*"/g, '');
await fs.writeFile(filePath, body, 'utf-8');
}
function unwrapDivAttributeWrapper(body, attrName, { expandSingleLineContainer = false } = {}) {
const lines = String(body).split('\n');
const attrRe = new RegExp(`\\b${escapeRegExp(attrName)}=`);
for (let i = 0; i < lines.length; i++) {
if (!/<div\b/.test(lines[i]) || !attrRe.test(lines[i])) continue;
const indent = (lines[i].match(/^(\s*)/) || [''])[1];
let depth = countDivDepthDelta(lines[i]);
for (let j = i + 1; j < lines.length; j++) {
depth += countDivDepthDelta(lines[j]);
if (depth !== 0) continue;
let replacement = reindentWrapperBody(lines.slice(i + 1, j), indent).join('\n');
if (expandSingleLineContainer) {
replacement = expandAcceptedVariantMarkup(replacement, indent);
}
lines.splice(i, j - i + 1, ...replacement.split('\n'));
return lines.join('\n');
}
}
return body;
}
function countDivDepthDelta(line) {
return countMatches(line, /<div\b/g) - countMatches(line, /<\/div>/g);
}
function countMatches(value, re) {
return [...String(value || '').matchAll(re)].length;
}
function reindentWrapperBody(lines, indent) {
const firstContentLine = lines.find((line) => line.trim() !== '');
const innerIndent = (firstContentLine?.match(/^(\s*)/) || [''])[1] || '';
return lines.map((line) => {
if (line.trim() === '') return '';
if (innerIndent && line.startsWith(innerIndent)) return indent + line.slice(innerIndent.length);
return indent + line.trimStart();
});
}
function expandAcceptedVariantMarkup(source, indent) {
const lines = source.split('\n');
if (lines.length !== 1) return source;
const leading = lines[0].match(/^\s*/)?.[0] || indent;
const trimmed = lines[0].trim();
const expanded = expandSingleLineContainer(trimmed, leading);
return expanded || source;
}
function expandSingleLineContainer(html, indent) {
const outer = html.match(/^<([A-Za-z][\w:-]*)([^>]*)>([\s\S]+)<\/\1>$/);
if (!outer) return null;
const [, tagName, attrs, inner] = outer;
const children = splitTopLevelElements(inner.trim());
if (children.length < 2) return null;
return [
`${indent}<${tagName}${attrs}>`,
...children.map((child) => `${indent} ${child}`),
`${indent}</${tagName}>`,
].join('\n');
}
function splitTopLevelElements(html) {
const children = [];
let index = 0;
while (index < html.length) {
while (/\s/.test(html[index] || '')) index++;
if (index >= html.length) break;
if (html[index] !== '<') return [];
const open = html.slice(index).match(/^<([A-Za-z][\w:-]*)(?:\s[^>]*)?>/);
if (!open) return [];
const tagName = open[1];
const tagRe = new RegExp(`</?${escapeRegExp(tagName)}(?=[\\s>/])[^>]*>`, 'g');
tagRe.lastIndex = index;
let depth = 0;
let end = -1;
let match;
while ((match = tagRe.exec(html))) {
const token = match[0];
if (token.startsWith('</')) depth--;
else if (!token.endsWith('/>')) depth++;
if (depth === 0) {
end = tagRe.lastIndex;
break;
}
}
if (end === -1) return [];
children.push(html.slice(index, end).trim());
index = end;
}
return children;
}
function escapeRegExp(value) {
return value.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
}
async function runAccept({ tmp, scriptsDir, id, variant, discard, paramValues, pageUrl }) {
const args = [path.join(scriptsDir, 'live-accept.mjs'), '--id', id];
if (discard) args.push('--discard');
else args.push('--variant', String(variant));
if (paramValues) args.push('--param-values', JSON.stringify(paramValues));
if (pageUrl) args.push('--page-url', pageUrl);
const { stdout } = await execFileP(process.execPath, args, { cwd: tmp });
const last = stdout.trim().split('\n').filter(Boolean).pop();
return JSON.parse(last);
}
async function runLiveComplete({ tmp, scriptsDir, id }) {
await execFileP(process.execPath, [path.join(scriptsDir, 'live-complete.mjs'), '--id', id], { cwd: tmp });
}