mirror of
git://jb55.com/damus
synced 2024-09-18 19:23:49 +00:00
2053033b25
We need this for the switchover
345 lines
9.4 KiB
Swift
345 lines
9.4 KiB
Swift
//
|
|
// NdbNote.swift
|
|
// damus
|
|
//
|
|
// Created by William Casarin on 2023-07-21.
|
|
//
|
|
|
|
import Foundation
|
|
import NaturalLanguage
|
|
|
|
|
|
struct NdbStr {
|
|
let note: NdbNote
|
|
let str: UnsafePointer<CChar>
|
|
}
|
|
|
|
struct NdbId {
|
|
let note: NdbNote
|
|
let id: Data
|
|
}
|
|
|
|
enum NdbData {
|
|
case id(NdbId)
|
|
case str(NdbStr)
|
|
|
|
init(note: NdbNote, str: ndb_str) {
|
|
guard str.flag == NDB_PACKED_ID else {
|
|
self = .str(NdbStr(note: note, str: str.str))
|
|
return
|
|
}
|
|
|
|
let buffer = UnsafeBufferPointer(start: str.id, count: 32)
|
|
self = .id(NdbId(note: note, id: Data(buffer: buffer)))
|
|
}
|
|
}
|
|
|
|
class NdbNote: Equatable {
|
|
// we can have owned notes, but we can also have lmdb virtual-memory mapped notes so its optional
|
|
private let owned: Bool
|
|
let count: Int
|
|
let note: UnsafeMutablePointer<ndb_note>
|
|
|
|
// cached stuff (TODO: remove these)
|
|
private var _event_refs: [EventRef]? = nil
|
|
var decrypted_content: String? = nil
|
|
private var _blocks: Blocks? = nil
|
|
private lazy var inner_event: NdbNote? = {
|
|
return NdbNote.owned_from_json_cstr(json: content_raw, json_len: content_len)
|
|
}()
|
|
|
|
init(note: UnsafeMutablePointer<ndb_note>, owned_size: Int?) {
|
|
self.note = note
|
|
self.owned = owned_size != nil
|
|
self.count = owned_size ?? 0
|
|
}
|
|
|
|
var content: String {
|
|
String(cString: content_raw, encoding: .utf8) ?? ""
|
|
}
|
|
|
|
var content_raw: UnsafePointer<CChar> {
|
|
ndb_note_content(note)
|
|
}
|
|
|
|
var content_len: UInt32 {
|
|
ndb_note_content_length(note)
|
|
}
|
|
|
|
/// These are unsafe if working on owned data and if this outlives the NdbNote
|
|
var id: Data {
|
|
Data(buffer: UnsafeBufferPointer(start: ndb_note_id(note), count: 32))
|
|
}
|
|
|
|
/// Make a copy if this outlives the note and the note has owned data!
|
|
var pubkey: Data {
|
|
Data(buffer: UnsafeBufferPointer(start: ndb_note_pubkey(note), count: 32))
|
|
}
|
|
|
|
var created_at: UInt32 {
|
|
ndb_note_created_at(note)
|
|
}
|
|
|
|
var kind: UInt32 {
|
|
ndb_note_kind(note)
|
|
}
|
|
|
|
var tags: TagsSequence {
|
|
.init(note: self)
|
|
}
|
|
|
|
deinit {
|
|
if self.owned {
|
|
free(note)
|
|
}
|
|
}
|
|
|
|
static func == (lhs: NdbNote, rhs: NdbNote) -> Bool {
|
|
return lhs.id == rhs.id
|
|
}
|
|
|
|
static func owned_from_json(json: String, bufsize: Int = 2 << 18) -> NdbNote? {
|
|
return json.withCString { cstr in
|
|
return NdbNote.owned_from_json_cstr(
|
|
json: cstr, json_len: UInt32(json.utf8.count), bufsize: bufsize)
|
|
}
|
|
}
|
|
|
|
static func owned_from_json_cstr(json: UnsafePointer<CChar>, json_len: UInt32, bufsize: Int = 2 << 18) -> NdbNote? {
|
|
let data = malloc(bufsize)
|
|
//guard var json_cstr = json.cString(using: .utf8) else { return nil }
|
|
|
|
//json_cs
|
|
var note: UnsafeMutablePointer<ndb_note>?
|
|
|
|
let len = ndb_note_from_json(json, Int32(json_len), ¬e, data, Int32(bufsize))
|
|
|
|
if len == 0 {
|
|
free(data)
|
|
return nil
|
|
}
|
|
|
|
// Create new Data with just the valid bytes
|
|
guard let note_data = realloc(data, Int(len)) else { return nil }
|
|
let new_note = note_data.assumingMemoryBound(to: ndb_note.self)
|
|
|
|
return NdbNote(note: new_note, owned_size: Int(len))
|
|
}
|
|
}
|
|
|
|
|
|
// NostrEvent compat
|
|
extension NdbNote {
|
|
var is_textlike: Bool {
|
|
return kind == 1 || kind == 42 || kind == 30023
|
|
}
|
|
|
|
var known_kind: NostrKind? {
|
|
return NostrKind.init(rawValue: Int(kind))
|
|
}
|
|
|
|
var too_big: Bool {
|
|
return known_kind != .longform && self.content_len > 16000
|
|
}
|
|
|
|
var should_show_event: Bool {
|
|
return !too_big
|
|
}
|
|
|
|
|
|
//var is_valid_id: Bool {
|
|
// return calculate_event_id(ev: self) == self.id
|
|
//}
|
|
|
|
func get_blocks(content: String) -> Blocks {
|
|
return parse_note_content_ndb(note: self)
|
|
}
|
|
|
|
func get_inner_event(cache: EventCache) -> NostrEvent? {
|
|
guard self.known_kind == .boost else {
|
|
return nil
|
|
}
|
|
|
|
if self.content == "", let ref = self.referenced_ids.first {
|
|
// TODO: raw id cache lookups
|
|
let id = ref.id.string()
|
|
return cache.lookup(id)
|
|
}
|
|
|
|
// TODO: how to handle inner events?
|
|
return nil
|
|
//return self.inner_event
|
|
}
|
|
|
|
// TODO: References iterator
|
|
public var referenced_ids: LazyFilterSequence<References> {
|
|
References.ids(tags: self.tags)
|
|
}
|
|
|
|
public var referenced_pubkeys: LazyFilterSequence<References> {
|
|
References.pubkeys(tags: self.tags)
|
|
}
|
|
|
|
func event_refs(_ privkey: String?) -> [EventRef] {
|
|
if let rs = _event_refs {
|
|
return rs
|
|
}
|
|
let refs = interpret_event_refs_ndb(blocks: self.blocks(privkey).blocks, tags: self.tags)
|
|
self._event_refs = refs
|
|
return refs
|
|
}
|
|
|
|
func get_content(_ privkey: String?) -> String {
|
|
if known_kind == .dm {
|
|
return decrypted(privkey: privkey) ?? "*failed to decrypt content*"
|
|
}
|
|
|
|
return content
|
|
}
|
|
|
|
func blocks(_ privkey: String?) -> Blocks {
|
|
if let bs = _blocks { return bs }
|
|
|
|
let blocks = get_blocks(content: self.get_content(privkey))
|
|
self._blocks = blocks
|
|
return blocks
|
|
}
|
|
|
|
// NDBTODO: switch this to operating on bytes not strings
|
|
func decrypted(privkey: String?) -> String? {
|
|
if let decrypted_content = decrypted_content {
|
|
return decrypted_content
|
|
}
|
|
|
|
guard let key = privkey else {
|
|
return nil
|
|
}
|
|
|
|
guard let our_pubkey = privkey_to_pubkey(privkey: key) else {
|
|
return nil
|
|
}
|
|
|
|
// NDBTODO: don't hex encode
|
|
var pubkey = hex_encode(self.pubkey)
|
|
// This is our DM, we need to use the pubkey of the person we're talking to instead
|
|
|
|
if our_pubkey == pubkey {
|
|
guard let refkey = self.referenced_pubkeys.first else {
|
|
return nil
|
|
}
|
|
|
|
pubkey = refkey.ref_id.string()
|
|
}
|
|
|
|
// NDBTODO: pass data to pubkey
|
|
let dec = decrypt_dm(key, pubkey: pubkey, content: self.content, encoding: .base64)
|
|
self.decrypted_content = dec
|
|
|
|
return dec
|
|
}
|
|
|
|
/*
|
|
|
|
var description: String {
|
|
return "NostrEvent { id: \(id) pubkey \(pubkey) kind \(kind) tags \(tags) content '\(content)' }"
|
|
}
|
|
|
|
// Not sure I should implement this
|
|
private func get_referenced_ids(key: String) -> [ReferencedId] {
|
|
return damus.get_referenced_ids(tags: self.tags, key: key)
|
|
}
|
|
*/
|
|
|
|
public func direct_replies(_ privkey: String?) -> [ReferencedId] {
|
|
return event_refs(privkey).reduce(into: []) { acc, evref in
|
|
if let direct_reply = evref.is_direct_reply {
|
|
acc.append(direct_reply)
|
|
}
|
|
}
|
|
}
|
|
|
|
// NDBTODO: just use Id
|
|
public func thread_id(privkey: String?) -> String {
|
|
for ref in event_refs(privkey) {
|
|
if let thread_id = ref.is_thread_id {
|
|
return thread_id.ref_id
|
|
}
|
|
}
|
|
|
|
return hex_encode(self.id)
|
|
}
|
|
|
|
public func last_refid() -> ReferencedId? {
|
|
return self.referenced_ids.last?.to_referenced_id()
|
|
}
|
|
|
|
// NDBTODO: id -> data
|
|
public func references(id: String, key: AsciiCharacter) -> Bool {
|
|
for ref in References(tags: self.tags) {
|
|
if ref.key == key && ref.id.string() == id {
|
|
return true
|
|
}
|
|
}
|
|
|
|
return false
|
|
}
|
|
|
|
func is_reply(_ privkey: String?) -> Bool {
|
|
return event_is_reply(self.event_refs(privkey))
|
|
}
|
|
|
|
func note_language(_ privkey: String?) async -> String? {
|
|
let t = Task.detached {
|
|
// Rely on Apple's NLLanguageRecognizer to tell us which language it thinks the note is in
|
|
// and filter on only the text portions of the content as URLs and hashtags confuse the language recognizer.
|
|
let originalBlocks = self.blocks(privkey).blocks
|
|
let originalOnlyText = originalBlocks.compactMap { $0.is_text }.joined(separator: " ")
|
|
|
|
// Only accept language recognition hypothesis if there's at least a 50% probability that it's accurate.
|
|
let languageRecognizer = NLLanguageRecognizer()
|
|
languageRecognizer.processString(originalOnlyText)
|
|
|
|
guard let locale = languageRecognizer.languageHypotheses(withMaximum: 1).first(where: { $0.value >= 0.5 })?.key.rawValue else {
|
|
let nstr: String? = nil
|
|
return nstr
|
|
}
|
|
|
|
// Remove the variant component and just take the language part as translation services typically only supports the variant-less language.
|
|
// Moreover, speakers of one variant can generally understand other variants.
|
|
return localeToLanguage(locale)
|
|
}
|
|
|
|
return await t.value
|
|
}
|
|
|
|
/*
|
|
|
|
func calculate_id() {
|
|
self.id = calculate_event_id(ev: self)
|
|
}
|
|
|
|
func sign(privkey: String) {
|
|
self.sig = sign_event(privkey: privkey, ev: self)
|
|
}
|
|
|
|
var age: TimeInterval {
|
|
let event_date = Date(timeIntervalSince1970: TimeInterval(created_at))
|
|
return Date.now.timeIntervalSince(event_date)
|
|
}
|
|
*/
|
|
}
|
|
|
|
extension LazyFilterSequence {
|
|
var first: Element? {
|
|
self.first(where: { _ in true })
|
|
}
|
|
|
|
var last: Element? {
|
|
var ev: Element? = nil
|
|
for e in self {
|
|
ev = e
|
|
}
|
|
return ev
|
|
}
|
|
}
|