Method finalizeEditSession

src/durable-objects/user-notes.ts:341–366

(noteId: string, sessionId: string, reason = "finalize")

            let prevContent: string;
            try {
                prevContent = await this.reconstructVersion(head.id, noteId, { strict: true });
            } catch {
                return null;
            }
            if (!isEmptyDoc(prevContent)) return null;
        }

        // Coalesce autosave churn: a session version right after another
        // session version just moves that version forward instead of stacking
        // a new entry per tab-switch/idle. Never amend a version that another
        // branch also points at (branch create copies head_version_id) — that
        // would silently rewrite the other branch's snapshot in place.
        const now = Math.floor(Date.now() / 1000);
        const headSharedWithOtherBranch = head ? this.sql.exec(
            "SELECT 1 FROM note_branches WHERE head_version_id = ? AND id != ? LIMIT 1", head.id, branch.id
        ).toArray().length > 0 : false;
        if (
            kind === "session" && head?.kind === "session" && head.storage === "r2" &&
            !headSharedWithOtherBranch &&
            now - head.created_at < this.SESSION_AMEND_WINDOW_S
        ) {
            await this.bucket.put(head.data, content, { httpMetadata: { contentType: "application/json" } });
            this.sql.exec(
                "UPDATE note_versions SET title = ?, summary = ?, content_hash = ?, created_at = unixepoch() WHERE id = ?",
                title, summary, hash, head.id
            );
            return head.id;
        }