feat: Add git log parsing and rebase endpoint with input validation

apps/server/src/lib/git-log-parser.ts

@@ -0,0 +1,55 @@
+export interface CommitFields {
+  hash: string;
+  shortHash: string;
+  author: string;
+  authorEmail: string;
+  date: string;
+  subject: string;
+  body: string;
+}
+
+export function parseGitLogOutput(output: string): CommitFields[] {
+  const commits: CommitFields[] = [];
+
+  // Split by NUL character to separate commits
+  const commitBlocks = output.split('\0').filter((block) => block.trim());
+
+  for (const block of commitBlocks) {
+    const fields = block.split('\n');
+
+    // Validate we have all expected fields (at least hash, shortHash, author, authorEmail, date, subject)
+    if (fields.length < 6) {
+      continue; // Skip malformed blocks
+    }
+
+    const commit: CommitFields = {
+      hash: fields[0].trim(),
+      shortHash: fields[1].trim(),
+      author: fields[2].trim(),
+      authorEmail: fields[3].trim(),
+      date: fields[4].trim(),
+      subject: fields[5].trim(),
+      body: fields.slice(6).join('\n').trim(),
+    };
+
+    commits.push(commit);
+  }
+
+  return commits;
+}
+
+/**
+ * Creates a commit object from parsed fields, matching the expected API response format
+ */
+export function createCommitFromFields(fields: CommitFields, files?: string[]) {
+  return {
+    hash: fields.hash,
+    shortHash: fields.shortHash,
+    author: fields.author,
+    authorEmail: fields.authorEmail,
+    date: fields.date,
+    subject: fields.subject,
+    body: fields.body,
+    files: files || [],
+  };
+}