import { createHash } from 'crypto';
import { GIT_COMMIT_PATTERNS } from '../constants/git-patterns.js';
import type { Memory } from '../types/index.js';
const MIN_COMMIT_MESSAGE_LENGTH = 10;
/**
* Parse one git log line in format:
* <iso-date>\t<short-hash> <subject>
* Returns a normalized Memory when the subject matches supported commit patterns.
*/
export function parseGitLogLineToMemory(line: string): Memory | null {
const tabIdx = line.indexOf('\t');
if (tabIdx === -1) return null;
const commitDateRaw = line.substring(0, tabIdx).trim();
const hashAndSubject = line.substring(tabIdx + 1).trim();
if (!commitDateRaw || !hashAndSubject) return null;
const commitMs = Date.parse(commitDateRaw);
if (!Number.isFinite(commitMs)) return null;
for (const pattern of GIT_COMMIT_PATTERNS) {
if (!pattern.prefix.test(hashAndSubject)) continue;
const message = hashAndSubject.replace(/^[a-f0-9]+ /i, '').trim();
if (message.length < MIN_COMMIT_MESSAGE_LENGTH) return null;
const hashContent = `git:${pattern.type}:${pattern.category}:${message}`;
const id = createHash('sha256').update(hashContent).digest('hex').substring(0, 12);
return {
id,
type: pattern.type,
category: pattern.category,
memory: message,
reason: 'Auto-extracted from git commit history',
date: new Date(commitMs).toISOString(),
source: 'git'
};
}
return null;
}
export function parseGitLogToMemories(log: string): Memory[] {
if (!log.trim()) return [];
const memories: Memory[] = [];
for (const line of log.split('\n')) {
const parsed = parseGitLogLineToMemory(line);
if (parsed) memories.push(parsed);
}
return memories;
}
