mirror of
git://jb55.com/damus
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242 lines
7.3 KiB
Swift
242 lines
7.3 KiB
Swift
//
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// Ndb.swift
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// damus
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//
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// Created by William Casarin on 2023-08-25.
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//
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import Foundation
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class Ndb {
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let ndb: ndb_t
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static var db_path: String {
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let path = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first?.absoluteString
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return remove_file_prefix(path!)
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}
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static var empty: Ndb {
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Ndb(ndb: ndb_t(ndb: nil))
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}
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init?(path: String? = nil) {
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//try? FileManager.default.removeItem(atPath: Ndb.db_path + "/lock.mdb")
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//try? FileManager.default.removeItem(atPath: Ndb.db_path + "/data.mdb")
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var ndb_p: OpaquePointer? = nil
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let ingest_threads: Int32 = 4
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var mapsize: Int = 1024 * 1024 * 1024 * 32
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let path = path.map(remove_file_prefix) ?? Ndb.db_path
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let ok = path.withCString { testdir in
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var ok = false
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while !ok && mapsize > 1024 * 1024 * 700 {
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ok = ndb_init(&ndb_p, testdir, mapsize, ingest_threads, 0) != 0
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if !ok {
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mapsize /= 2
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}
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}
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return ok
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}
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if !ok {
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return nil
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}
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self.ndb = ndb_t(ndb: ndb_p)
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}
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init(ndb: ndb_t) {
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self.ndb = ndb
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}
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func lookup_note_by_key_with_txn<Y>(_ key: NoteKey, txn: NdbTxn<Y>) -> NdbNote? {
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guard let note_p = ndb_get_note_by_key(&txn.txn, key, nil) else {
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return nil
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}
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return NdbNote(note: note_p, owned_size: nil, key: key)
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}
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func lookup_note_by_key(_ key: NoteKey) -> NdbTxn<NdbNote?> {
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return NdbTxn(ndb: self) { txn in
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lookup_note_by_key_with_txn(key, txn: txn)
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}
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}
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private func lookup_profile_by_key_inner<Y>(_ key: ProfileKey, txn: NdbTxn<Y>) -> ProfileRecord? {
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var size: Int = 0
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guard let profile_p = ndb_get_profile_by_key(&txn.txn, key, &size) else {
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return nil
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}
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return profile_flatbuf_to_record(ptr: profile_p, size: size, key: key)
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}
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private func profile_flatbuf_to_record(ptr: UnsafeMutableRawPointer, size: Int, key: UInt64) -> ProfileRecord? {
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do {
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var buf = ByteBuffer(assumingMemoryBound: ptr, capacity: size)
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let rec: NdbProfileRecord = try getDebugCheckedRoot(byteBuffer: &buf)
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return ProfileRecord(data: rec, key: key)
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} catch {
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// Handle error appropriately
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print("UNUSUAL: \(error)")
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return nil
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}
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}
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private func lookup_note_with_txn_inner<Y>(id: NoteId, txn: NdbTxn<Y>) -> NdbNote? {
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return id.id.withUnsafeBytes { (ptr: UnsafeRawBufferPointer) -> NdbNote? in
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var key: UInt64 = 0
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guard let baseAddress = ptr.baseAddress,
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let note_p = ndb_get_note_by_id(&txn.txn, baseAddress, nil, &key) else {
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return nil
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}
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return NdbNote(note: note_p, owned_size: nil, key: key)
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}
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}
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private func lookup_profile_with_txn_inner<Y>(pubkey: Pubkey, txn: NdbTxn<Y>) -> ProfileRecord? {
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return pubkey.id.withUnsafeBytes { (ptr: UnsafeRawBufferPointer) -> ProfileRecord? in
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var size: Int = 0
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var key: UInt64 = 0
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guard let baseAddress = ptr.baseAddress,
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let profile_p = ndb_get_profile_by_pubkey(&txn.txn, baseAddress, &size, &key)
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else {
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return nil
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}
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return profile_flatbuf_to_record(ptr: profile_p, size: size, key: key)
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}
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}
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func lookup_profile_by_key_with_txn<Y>(key: ProfileKey, txn: NdbTxn<Y>) -> ProfileRecord? {
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lookup_profile_by_key_inner(key, txn: txn)
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}
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func lookup_profile_by_key(key: ProfileKey) -> NdbTxn<ProfileRecord?> {
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return NdbTxn(ndb: self) { txn in
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lookup_profile_by_key_inner(key, txn: txn)
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}
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}
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func lookup_note_with_txn<Y>(id: NoteId, txn: NdbTxn<Y>) -> NdbNote? {
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lookup_note_with_txn_inner(id: id, txn: txn)
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}
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func lookup_profile_key(_ pubkey: Pubkey) -> ProfileKey? {
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return NdbTxn(ndb: self) { txn in
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lookup_profile_key_with_txn(pubkey, txn: txn)
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}.value
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}
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func lookup_profile_key_with_txn<Y>(_ pubkey: Pubkey, txn: NdbTxn<Y>) -> ProfileKey? {
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return pubkey.id.withUnsafeBytes { (ptr: UnsafeRawBufferPointer) -> NoteKey? in
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guard let p = ptr.baseAddress else { return nil }
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let r = ndb_get_profilekey_by_pubkey(&txn.txn, p)
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if r == 0 {
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return nil
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}
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return r
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}
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}
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func lookup_note_key_with_txn<Y>(_ id: NoteId, txn: NdbTxn<Y>) -> NoteKey? {
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return id.id.withUnsafeBytes { (ptr: UnsafeRawBufferPointer) -> NoteKey? in
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guard let p = ptr.baseAddress else {
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return nil
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}
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let r = ndb_get_notekey_by_id(&txn.txn, p)
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if r == 0 {
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return nil
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}
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return r
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}
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}
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func lookup_note_key(_ id: NoteId) -> NoteKey? {
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NdbTxn(ndb: self, with: { txn in lookup_note_key_with_txn(id, txn: txn) }).value
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}
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func lookup_note(_ id: NoteId) -> NdbTxn<NdbNote?> {
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return NdbTxn(ndb: self) { txn in
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lookup_note_with_txn_inner(id: id, txn: txn)
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}
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}
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func lookup_profile(_ pubkey: Pubkey) -> NdbTxn<ProfileRecord?> {
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return NdbTxn(ndb: self) { txn in
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lookup_profile_with_txn_inner(pubkey: pubkey, txn: txn)
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}
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}
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func lookup_profile_with_txn<Y>(_ pubkey: Pubkey, txn: NdbTxn<Y>) -> ProfileRecord? {
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lookup_profile_with_txn_inner(pubkey: pubkey, txn: txn)
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}
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func process_client_event(_ str: String) -> Bool {
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return str.withCString { cstr in
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return ndb_process_client_event(ndb.ndb, cstr, Int32(str.utf8.count)) != 0
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}
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}
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func process_event(_ str: String) -> Bool {
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return str.withCString { cstr in
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return ndb_process_event(ndb.ndb, cstr, Int32(str.utf8.count)) != 0
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}
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}
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func process_events(_ str: String) -> Bool {
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return str.withCString { cstr in
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return ndb_process_events(ndb.ndb, cstr, str.utf8.count) != 0
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}
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}
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func search_profile<Y>(_ search: String, limit: Int, txn: NdbTxn<Y>) -> [Pubkey] {
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var pks = Array<Pubkey>()
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return search.withCString { q in
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var s = ndb_search()
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guard ndb_search_profile(&txn.txn, &s, q) != 0 else {
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return pks
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}
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defer { ndb_search_profile_end(&s) }
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pks.append(Pubkey(Data(bytes: &s.key.pointee.id.0, count: 32)))
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var n = limit
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while n > 0 {
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guard ndb_search_profile_next(&s) != 0 else {
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return pks
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}
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pks.append(Pubkey(Data(bytes: &s.key.pointee.id.0, count: 32)))
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n -= 1
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}
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return pks
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}
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}
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deinit {
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ndb_destroy(ndb.ndb)
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}
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}
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#if DEBUG
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func getDebugCheckedRoot<T: FlatBufferObject>(byteBuffer: inout ByteBuffer) throws -> T {
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return getRoot(byteBuffer: &byteBuffer)
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}
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#else
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func getDebugCheckedRoot<T: FlatBufferObject>(byteBuffer: inout ByteBuffer) throws -> T {
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return getRoot(byteBuffer: &byteBuffer)
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}
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#endif
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func remove_file_prefix(_ str: String) -> String {
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return str.replacingOccurrences(of: "file://", with: "")
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}
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