89 lines
2.7 KiB
Go
89 lines
2.7 KiB
Go
// Copyright (c) 2026 Probo Inc <hello@getprobo.com>.
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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// PERFORMANCE OF THIS SOFTWARE.
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package browser
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import (
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"context"
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"github.com/chromedp/chromedp"
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"go.probo.inc/probo/pkg/agent"
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)
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type (
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clickParams struct {
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URL string `json:"url" jsonschema:"The URL to navigate to before clicking"`
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Selector string `json:"selector" jsonschema:"CSS selector of the element to click (e.g. button.next, a[href*=page])"`
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}
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)
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func ClickElementTool(b *Browser) agent.Tool {
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return agent.FunctionTool(
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"click_element",
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"Navigate to a URL, click an element matching a CSS selector, and return the page text after the click. Useful for pagination buttons, 'show all' links, tabs, and other interactive elements.",
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func(ctx context.Context, p clickParams) (agent.ToolResult, error) {
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if r := b.checkAlive(); r != nil {
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return *r, nil
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}
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if r := b.checkURL(p.URL); r != nil {
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return *r, nil
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}
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ctx, timeoutCancel := withToolTimeout(ctx)
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defer timeoutCancel()
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tabCtx, cancel := b.NewTab(ctx)
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defer cancel()
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var (
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text string
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postClickURL string
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)
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err := chromedp.Run(
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tabCtx,
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chromedp.Navigate(p.URL),
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waitForPage(),
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chromedp.WaitVisible(p.Selector),
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chromedp.Click(p.Selector),
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waitForPage(),
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chromedp.Location(&postClickURL),
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chromedp.Evaluate(`document.body.innerText`, &text),
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)
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if err != nil {
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return agent.ResultError(b.classifyError(ctx, p.URL, err)), nil
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}
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// Revalidate the post-click URL: a click may navigate
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// the page to a different host (redirect, JS navigation,
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// <a href>), bypassing the initial checkURL. Reject the
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// result if the new URL is outside the allowed scope or
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// resolves to a non-public IP.
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if postClickURL != "" && postClickURL != p.URL {
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if r := b.checkURL(postClickURL); r != nil {
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return *r, nil
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}
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}
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runes := []rune(text)
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if len(runes) > maxTextLength {
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text = string(runes[:maxTextLength])
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}
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return agent.ToolResult{Content: text}, nil
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},
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)
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}
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