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import { type Browser, type BrowserContext, type Page, webkit } from 'playwright';
import type { BrowserCommand, BrowserOptions, CommandResponse, ElementInfo } from './types.js';
export class ClaudeBrowser {
private browser: Browser | null = null;
private context: BrowserContext | null = null;
private page: Page | null = null;
private options: Required<BrowserOptions>;
constructor(options: BrowserOptions = {}) {
this.options = {
headless: options.headless ?? true,
width: options.width ?? 1280,
height: options.height ?? 800,
};
}
async launch(): Promise<void> {
this.browser = await webkit.launch({ headless: this.options.headless });
this.context = await this.browser.newContext({
viewport: {
width: this.options.width,
height: this.options.height,
},
});
this.page = await this.context.newPage();
}
async close(): Promise<void> {
if (this.browser) {
await this.browser.close();
this.browser = null;
this.context = null;
this.page = null;
}
}
private ensurePage(): Page {
if (!this.page) {
throw new Error('Browser not launched. Call launch() first.');
}
return this.page;
}
async goto(url: string): Promise<{ url: string; title: string }> {
const page = this.ensurePage();
await page.goto(url, { waitUntil: 'networkidle' });
return { url: page.url(), title: await page.title() };
}
async click(selector: string): Promise<{ url: string }> {
const page = this.ensurePage();
await page.click(selector);
await page.waitForLoadState('networkidle').catch(() => {});
return { url: page.url() };
}
async type(selector: string, text: string): Promise<void> {
const page = this.ensurePage();
await page.fill(selector, text);
}
async query(selector: string): Promise<ElementInfo[]> {
const page = this.ensurePage();
return page.$$eval(selector, (nodes) =>
nodes.map((el) => {
const attrs: Record<string, string> = {};
for (const attr of el.attributes) {
attrs[attr.name] = attr.value;
}
return {
tag: el.tagName.toLowerCase(),
text: el.textContent?.trim().slice(0, 200) || '',
attributes: attrs,
};
})
);
}
async screenshot(path?: string, fullPage = false): Promise<{ path: string; buffer?: Buffer }> {
const page = this.ensurePage();
const resolvedPath = resolve(path || 'screenshot.png');
const buffer = await page.screenshot({ path: resolvedPath, fullPage });
return { path: resolvedPath, buffer };
}
async getUrl(): Promise<{ url: string; title: string }> {
const page = this.ensurePage();
return { url: page.url(), title: await page.title() };
}
async getHtml(full = false): Promise<string> {
const page = this.ensurePage();
const html = await page.content();
return full ? html : html.slice(0, 10000);
}
async back(): Promise<{ url: string }> {
const page = this.ensurePage();
await page.goBack();
return { url: page.url() };
}
async forward(): Promise<{ url: string }> {
const page = this.ensurePage();
await page.goForward();
return { url: page.url() };
}
async reload(): Promise<{ url: string }> {
const page = this.ensurePage();
await page.reload();
return { url: page.url() };
}
async wait(ms = 1000): Promise<void> {
const page = this.ensurePage();
await page.waitForTimeout(ms);
}
async newPage(): Promise<void> {
if (!this.context) {
throw new Error('Browser not launched. Call launch() first.');
}
this.page = await this.context.newPage();
}
async eval(script: string): Promise<unknown> {
const page = this.ensurePage();
return page.evaluate(script);
}
async executeCommand(cmd: BrowserCommand): Promise<CommandResponse> {
try {
switch (cmd.cmd) {
case 'goto': {
const result = await this.goto(cmd.url);
return { ok: true, ...result };
}
case 'click': {
const result = await this.click(cmd.selector);
return { ok: true, ...result };
}
case 'type': {
await this.type(cmd.selector, cmd.text);
return { ok: true };
}
case 'query': {
const elements = await this.query(cmd.selector);
return { ok: true, count: elements.length, elements };
}
case 'screenshot': {
const result = await this.screenshot(cmd.path, cmd.fullPage);
return { ok: true, path: result.path };
}
case 'url': {
const result = await this.getUrl();
return { ok: true, ...result };
}
case 'html': {
const html = await this.getHtml(cmd.full);
return { ok: true, html };
}
case 'back': {
const result = await this.back();
return { ok: true, ...result };
}
case 'forward': {
const result = await this.forward();
return { ok: true, ...result };
}
case 'reload': {
const result = await this.reload();
return { ok: true, ...result };
}
case 'wait': {
await this.wait(cmd.ms);
return { ok: true };
}
case 'newpage': {
await this.newPage();
return { ok: true };
}
case 'close': {
await this.close();
return { ok: true };
}
case 'eval': {
const result = await this.eval(cmd.script);
return { ok: true, result };
}
default: {
const _exhaustive: never = cmd;
return { ok: false, error: `Unknown command: ${(_exhaustive as { cmd: string }).cmd}` };
}
}
} catch (err) {
return { ok: false, error: (err as Error).message };
}
}
}
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