Files
tolaria/mcp-server/vault.js
2026-06-05 16:27:18 +02:00

461 lines
13 KiB
JavaScript

/**
* Vault operations — read-only helpers for Tolaria markdown vault.
* Most write operations are handled by the app-managed agent's active
* permission profile and native file-edit tools; createNote is intentionally
* narrow so read-only agents can create a new Markdown file without overwrite.
*/
import { mkdir, open, opendir, realpath } from 'node:fs/promises'
import path from 'node:path'
import matter from 'gray-matter'
const ACTIVE_VAULT_ERROR = 'Note path must stay inside the active vault'
/**
* Recursively find all .md files under a directory.
* @param {string} dir
* @returns {Promise<string[]>}
*/
export async function findMarkdownFiles(dir) {
const results = []
const items = await opendir(dir)
for await (const item of items) {
await collectMarkdownFile(results, dir, item)
}
return results
}
async function resolveVaultNotePath(vaultPath, notePath) {
const vaultRoot = await realpath(vaultPath)
const requestedPath = resolveRequestedNotePath(vaultRoot, notePath)
const noteRealPath = await realpath(requestedPath)
const relativePath = path.relative(vaultRoot, noteRealPath)
if (!isVaultRelativePath(relativePath)) {
throw new Error(ACTIVE_VAULT_ERROR)
}
return {
vaultRoot,
noteRealPath,
relativePath,
}
}
/**
* Read a note with parsed frontmatter and content.
* @param {string} vaultPath
* @param {string} notePath
* @returns {Promise<{path: string, frontmatter: Record<string, unknown>, content: string}>}
*/
export async function getNote(vaultPath, notePath) {
const {
noteRealPath,
relativePath,
} = await resolveVaultNotePath(vaultPath, notePath)
const raw = await readUtf8File(noteRealPath)
const parsed = parseMarkdownNote(raw)
return {
path: relativePath,
frontmatter: parsed.data,
content: parsed.content.trim(),
}
}
/**
* Create a new markdown note inside the vault without overwriting an existing file.
* @param {string} vaultPath
* @param {string} notePath
* @param {string} content
* @returns {Promise<{path: string, absolutePath: string}>}
*/
export async function createNote(vaultPath, notePath, content) {
const { requestedPath, relativePath } = await resolveNewVaultNotePath(vaultPath, notePath)
await writeNewUtf8File(requestedPath, content)
return {
path: relativePath,
absolutePath: requestedPath,
}
}
/**
* Search notes by title or content substring.
* @param {string} vaultPath
* @param {string} query
* @param {number} [limit=10]
* @returns {Promise<Array<{path: string, title: string, snippet: string}>>}
*/
export async function searchNotes(vaultPath, query, limit = 10) {
const files = await findMarkdownFiles(vaultPath)
const q = query.toLowerCase()
const results = []
for (const filePath of files) {
if (results.length >= limit) break
const content = await readUtf8File(filePath)
const filename = path.basename(filePath, '.md')
const titleMatch = extractTitle(content, filename)
if (!matchesSearchQuery(titleMatch, content, q)) continue
const snippet = extractSnippet(content, q)
results.push({
path: path.relative(vaultPath, filePath),
title: titleMatch,
snippet,
})
}
return results
}
/**
* Get vault context: unique types, note count, top-level folders, and 20 most recent notes.
* @param {string} vaultPath
* @returns {Promise<{types: string[], noteCount: number, folders: string[], recentNotes: Array<{path: string, title: string, type: string|null}>, vaultPath: string}>}
*/
export async function vaultContext(vaultPath) {
const files = await findMarkdownFiles(vaultPath)
const typesSet = new Set()
const foldersSet = new Set()
const notesWithMtime = []
for (const filePath of files) {
const { topFolder, note, type } = await readVaultContextNote(vaultPath, filePath)
if (type) typesSet.add(type)
if (topFolder) foldersSet.add(topFolder)
notesWithMtime.push(note)
}
notesWithMtime.sort((a, b) => b.mtime - a.mtime)
const recentNotes = notesWithMtime.slice(0, 20).map(contextNoteWithoutMtime)
return {
types: [...typesSet].sort(),
noteCount: files.length,
folders: [...foldersSet].sort(),
recentNotes,
configFiles: await readConfigFiles(vaultPath),
vaultPath,
}
}
// --- Helpers ---
async function collectMarkdownFile(results, dir, item) {
if (item.name.startsWith('.')) return
const full = resolveInside(dir, item.name)
if (!full) return
if (item.isDirectory()) {
results.push(...await findMarkdownFiles(full))
return
}
if (item.name.endsWith('.md')) {
results.push(full)
}
}
function resolveRequestedNotePath(vaultRoot, notePath) {
if (path.isAbsolute(notePath)) return notePath
const resolved = resolveInside(vaultRoot, notePath)
if (!resolved) throw new Error(ACTIVE_VAULT_ERROR)
return resolved
}
async function resolveNewVaultNotePath(vaultPath, notePath) {
const requestedNotePath = validateNewNotePath(notePath)
const vaultRoot = await realpath(vaultPath)
const requestedPath = resolveRequestedNotePath(vaultRoot, requestedNotePath)
const relativePath = relativeNotePathInsideVault(vaultRoot, requestedPath)
await ensureWritableParentInsideVault(vaultRoot, requestedPath)
return { requestedPath, relativePath }
}
function validateNewNotePath(notePath) {
const trimmedPath = typeof notePath === 'string' ? notePath.trim() : ''
if (!trimmedPath) {
throw new Error('Note path is required')
}
if (!trimmedPath.endsWith('.md')) {
throw new Error('New notes must be markdown files ending in .md')
}
return trimmedPath
}
async function ensureWritableParentInsideVault(vaultRoot, requestedPath) {
const parentPath = path.dirname(requestedPath)
const existingAncestor = await nearestExistingAncestor(parentPath)
assertInsideVault(vaultRoot, existingAncestor)
await mkdir(parentPath, { recursive: true })
assertInsideVault(vaultRoot, await realpath(parentPath))
}
async function nearestExistingAncestor(targetPath) {
let currentPath = targetPath
while (currentPath && currentPath !== path.dirname(currentPath)) {
try {
return await realpath(currentPath)
} catch (error) {
if (error?.code !== 'ENOENT') throw error
currentPath = path.dirname(currentPath)
}
}
return realpath(currentPath)
}
function assertInsideVault(vaultRoot, targetPath) {
if (!isVaultRelativePath(path.relative(vaultRoot, targetPath))) {
throw new Error(ACTIVE_VAULT_ERROR)
}
}
function relativeNotePathInsideVault(vaultRoot, requestedPath) {
const relativePath = path.relative(vaultRoot, requestedPath)
if (!isVaultRelativePath(relativePath) || !relativePath) {
throw new Error(ACTIVE_VAULT_ERROR)
}
return relativePath
}
function resolveInside(root, target) {
const resolved = path.resolve(root, target)
const relative = path.relative(root, resolved)
if (isVaultRelativePath(relative)) return resolved
return null
}
function isVaultRelativePath(relativePath) {
return !relativePath.startsWith('..') && !path.isAbsolute(relativePath)
}
function matchesSearchQuery(title, content, query) {
return title.toLowerCase().includes(query) || content.toLowerCase().includes(query)
}
function contextNoteWithoutMtime(note) {
return {
path: note.path,
title: note.title,
type: note.type,
}
}
async function readVaultContextNote(vaultPath, filePath) {
const raw = await readUtf8File(filePath)
const parsed = parseMarkdownNote(raw)
const rel = path.relative(vaultPath, filePath)
const topFolder = extractTopFolder(rel)
const stat = await statFile(filePath)
const type = parsed.data.type || parsed.data.is_a || null
return {
topFolder,
type,
note: {
path: rel,
title: parsed.data.title || extractTitle(raw, path.basename(filePath, '.md')),
type,
mtime: stat.mtimeMs,
},
}
}
function parseMarkdownNote(raw) {
try {
const parsed = matter(raw)
const fallback = parseFrontmatterFallback(raw)
return shouldUseFallbackFrontmatter(parsed, fallback) ? fallback : parsed
} catch {
return parseFrontmatterFallback(raw)
}
}
function shouldUseFallbackFrontmatter(parsed, fallback) {
return Object.keys(parsed.data).length === 0 && Object.keys(fallback.data).length > 0
}
function parseFrontmatterFallback(raw) {
const split = splitFrontmatter(raw)
if (!split) return { data: {}, content: raw }
return {
data: parseFrontmatterBlock(split.frontmatter),
content: split.content,
}
}
function splitFrontmatter(raw) {
const match = raw.match(/^---\r?\n([\s\S]*?)\r?\n---[ \t]*(?:\r?\n|$)([\s\S]*)$/)
if (!match) return null
return { frontmatter: match[1], content: match[2] }
}
function parseFrontmatterBlock(frontmatter) {
const data = {}
let listKey = null
for (const line of frontmatter.split(/\r?\n/)) {
const item = parseYamlListItem(line)
if (listKey && item !== null) {
data[listKey].push(parseYamlScalar(item))
continue
}
listKey = null
const field = parseTopLevelYamlField(line)
if (!field) continue
data[field.key] = field.value ? parseYamlValue(field.value) : []
listKey = field.value ? null : field.key
}
return data
}
function parseTopLevelYamlField(line) {
if (!line || line.trimStart() !== line || line.trimStart().startsWith('#')) return null
const separatorIndex = line.indexOf(':')
if (separatorIndex <= 0) return null
return {
key: stripMatchingQuotes(line.slice(0, separatorIndex).trim()),
value: line.slice(separatorIndex + 1).trim(),
}
}
function parseYamlValue(value) {
if (value.startsWith('[') && value.endsWith(']')) {
return splitInlineYamlArray(value).map(parseYamlScalar)
}
return parseYamlScalar(value)
}
function splitInlineYamlArray(value) {
const inner = value.slice(1, -1)
const items = []
let current = ''
let quote = null
for (const char of inner) {
if (quote) {
current += char
if (char === quote) quote = null
continue
}
if (char === '"' || char === "'") {
quote = char
current += char
continue
}
if (char === ',') {
items.push(current.trim())
current = ''
continue
}
current += char
}
if (current.trim()) items.push(current.trim())
return items
}
function parseYamlListItem(line) {
const match = line.match(/^\s+-\s*(.*)$/)
return match ? match[1].trim() : null
}
function parseYamlScalar(value) {
const unquoted = stripMatchingQuotes(value.trim())
if (unquoted !== value.trim()) return unquoted
if (/^(true|yes)$/i.test(unquoted)) return true
if (/^(false|no)$/i.test(unquoted)) return false
if (/^(null|~)$/i.test(unquoted)) return null
if (/^-?\d+(\.\d+)?$/.test(unquoted)) return Number(unquoted)
return unquoted
}
function stripMatchingQuotes(value) {
const first = value[0]
const last = value[value.length - 1]
return (first === '"' || first === "'") && first === last ? value.slice(1, -1) : value
}
function extractTopFolder(relativePath) {
const topFolder = relativePath.split(path.sep)[0]
return topFolder === relativePath ? null : `${topFolder}/`
}
async function readConfigFiles(vaultPath) {
const configFiles = {}
try {
const agentsPath = resolveInside(vaultPath, 'config/agents.md')
if (agentsPath) configFiles.agents = await readUtf8File(agentsPath)
} catch {
// config/agents.md may not exist yet
}
return configFiles
}
async function readUtf8File(filePath) {
const handle = await open(filePath, 'r')
try {
return await handle.readFile('utf-8')
} finally {
await handle.close()
}
}
async function writeNewUtf8File(filePath, content) {
const handle = await open(filePath, 'wx')
try {
await handle.writeFile(content, 'utf-8')
} finally {
await handle.close()
}
}
async function statFile(filePath) {
const handle = await open(filePath, 'r')
try {
return await handle.stat()
} finally {
await handle.close()
}
}
/**
* Extract title from markdown content (first H1 or frontmatter title).
* @param {string} content
* @param {string} fallback
* @returns {string}
*/
function extractTitle(content, fallback) {
const h1Match = content.match(/^#\s+(.+)$/m)
if (h1Match) return h1Match[1].trim()
const titleMatch = content.match(/^title:\s*(.+)$/m)
if (titleMatch) return titleMatch[1].trim()
return fallback
}
/**
* Extract a snippet around the query match.
* @param {string} content
* @param {string} query
* @returns {string}
*/
function extractSnippet(content, query) {
const body = content.replace(/^---[\s\S]*?---\n?/, '').trim()
const idx = body.toLowerCase().indexOf(query)
if (idx === -1) return body.slice(0, 120)
const start = Math.max(0, idx - 40)
const end = Math.min(body.length, idx + query.length + 80)
return (start > 0 ? '...' : '') + body.slice(start, end) + (end < body.length ? '...' : '')
}