50 lines
1.3 KiB
TypeScript
50 lines
1.3 KiB
TypeScript
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/**
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* Pure utility functions for parsing ```diff blocks from chat/document text.
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* Mirrors the pattern in report-blocks.ts for testability.
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*/
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export type DiffSegment =
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| { type: "text"; text: string }
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| { type: "diff-artifact"; diff: string };
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/**
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* Split text containing ```diff ... ``` fenced blocks into
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* alternating text and diff-artifact segments.
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*/
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export function splitDiffBlocks(text: string): DiffSegment[] {
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const diffFenceRegex = /```diff\s*\n([\s\S]*?)```/g;
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const segments: DiffSegment[] = [];
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let lastIndex = 0;
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for (const match of text.matchAll(diffFenceRegex)) {
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const before = text.slice(lastIndex, match.index);
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if (before.trim()) {
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segments.push({ type: "text", text: before });
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}
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const diffContent = match[1].trimEnd();
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if (diffContent) {
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segments.push({ type: "diff-artifact", diff: diffContent });
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} else {
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// Empty diff block -- render as plain text
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segments.push({ type: "text", text: match[0] });
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}
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lastIndex = (match.index ?? 0) + match[0].length;
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}
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const remaining = text.slice(lastIndex);
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if (remaining.trim()) {
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segments.push({ type: "text", text: remaining });
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}
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return segments;
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}
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/**
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* Check if text contains any diff fenced blocks.
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*/
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export function hasDiffBlocks(text: string): boolean {
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return text.includes("```diff");
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}
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