hermes-seaeye[bot]
8295d24736
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
45 lines
1.6 KiB
TypeScript
45 lines
1.6 KiB
TypeScript
import { SLASH_COMMAND_RE } from './chat-runtime'
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/** Matches `agent/title_generator.py`'s MAX_DERIVED_TITLE_CHARS, so a draft
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* doesn't visibly reflow the moment the backend's derived title replaces it. */
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const MAX_DRAFT_TITLE_CHARS = 48
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/**
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* Name a draft after what the user has typed into it.
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*
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* The client-side twin of the backend's `derive_title`: first meaningful line,
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* whitespace collapsed, cut on a word boundary. It runs before any session
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* exists, so it can't reach the real titler — a draft has no persisted row and
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* no opening message yet, which is exactly what `apply_instant_title` needs.
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*
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* Empty when there's nothing worth naming, so the caller keeps "New session"
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* rather than showing a title that says less than the placeholder.
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*/
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export function deriveDraftTitle(text: string): string {
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const line =
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text
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.split('\n')
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.find(candidate => candidate.trim())
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?.trim() ?? ''
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if (!line) {
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return ''
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}
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// A bare `/skin` names the draft after the command rather than the work, the
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// failure the backend titler summarizes away. Title from the argument instead;
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// with no argument there is no intent yet, so the placeholder stands.
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const body = (SLASH_COMMAND_RE.test(line) ? line.replace(/^\/\S+\s*/, '') : line).split(/\s+/).join(' ')
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if (body.length <= MAX_DRAFT_TITLE_CHARS) {
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return body
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}
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// Cut on a word boundary, unless that would throw away more than half of it.
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const cut = body.slice(0, MAX_DRAFT_TITLE_CHARS)
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const space = cut.lastIndexOf(' ')
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const kept = space > MAX_DRAFT_TITLE_CHARS / 2 ? cut.slice(0, space) : cut
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return `${kept.replace(/[\s,.;:—-]+$/, '')}…`
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}
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