mirror of
https://github.com/vishalxl/nostr_console.git
synced 2025-04-26 08:20:49 +02:00
713 lines
22 KiB
Dart
713 lines
22 KiB
Dart
import 'dart:io';
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import 'dart:convert';
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import 'package:intl/intl.dart';
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import 'package:translator/translator.dart';
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import 'package:crypto/crypto.dart';
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import 'package:nostr_console/settings.dart';
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int gDebug = 1;
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// translate
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final translator = GoogleTranslator();
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const int gNumTranslateDays = 1;// translate for this number of days
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bool gTranslate = false; // translate flag
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// Structure to store kind 0 event meta data, and kind 3 meta data for each user. Will have info from latest
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// kind 0 event and/or kind 3 event, both with their own time stamps.
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class UserNameInfo {
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int? createdAt;
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String? name, about, picture;
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int? createdAtKind3;
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Event ?latestContactEvent;
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UserNameInfo(this.createdAt, this.name, this.about, this.picture, this.latestContactEvent, [this.createdAtKind3 = null]);
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}
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/*
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* global user names from kind 0 events, mapped from public key to a 3 element array of [name, about, picture]
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* JSON object {name: <username>, about: <string>, picture: <url, string>}
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* only has info from latest kind 0 event
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*/
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Map<String, UserNameInfo> gKindONames = {};
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// global reactions entry. Map of form <if of event reacted to, List of Reactors>
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// reach Reactor is a list of 2-elements ( first is public id of reactor event, second is comment)
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Map< String, List<List<String>> > gReactions = {};
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// global contact list of each user, including of the logged in user.
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// maps from pubkey of a user, to the latest contact list of that user, which is the latest kind 3 message
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// is updated as kind 3 events are received
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Map< String, List<Contact>> gContactLists = {};
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class EventData {
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String id;
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String pubkey;
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int createdAt;
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int kind;
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String content;
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List<String> eTagsRest;// rest of e tags
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List<String> pTags;// list of p tags for kind:1
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List<List<String>> tags;
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bool isNotification; // whether its to be highlighted using highlight color
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String evaluatedContent; // content which has mentions expanded, and which has been translated
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Set<String> newLikes; //
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List<Contact> contactList = []; // used for kind:3 events, which is contact list event
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bool isHidden; // hidden by sending a reaction kind 7 event to this event, by the logged in user
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bool isDeleted; // deleted by kind 5 event
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String getParent() {
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if( eTagsRest.isNotEmpty) {
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return eTagsRest[eTagsRest.length - 1];
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}
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return "";
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}
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EventData(this.id, this.pubkey, this.createdAt, this.kind, this.content, this.eTagsRest, this.pTags,
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this.contactList, this.tags, this.newLikes, {this.isNotification = false, this.evaluatedContent = "", this.isHidden = false, this.isDeleted = false});
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factory EventData.fromJson(dynamic json) {
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List<Contact> contactList = [];
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List<String> eTagsRead = [];
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List<String> pTagsRead = [];
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List<List<String>> tagsRead = [];
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var jsonTags = json['tags'];
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var numTags = jsonTags.length;
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// NIP 02: if the event is a contact list type, then populate contactList
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if(json['kind'] == 3) {
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for( int i = 0; i < numTags; i++) {
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var tag = jsonTags[i];
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if( tag.length < 2) {
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if( gDebug > 0) print("In event fromjson: invalid p tag of size 1");
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continue;
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}
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String server = defaultServerUrl;
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if( tag.length >=3 ) {
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server = tag[2].toString();
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if( server == 'wss://nostr.rocks' || server == "wss://nostr.bitcoiner.social") {
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server = defaultServerUrl;
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}
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}
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if( tag[0] == "p" && tag[1].length == 64) {
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Contact c = Contact(tag[1] as String, server);
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contactList.add(c);
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}
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}
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} else {
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int eKind = json['kind'];
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if ( eKind == 1 || eKind == 7 || eKind == 42 || eKind == 5 || eKind == 4) {
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for( int i = 0; i < numTags; i++) {
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var tag = jsonTags[i];
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//stdout.write(tag);
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//print(tag.runtimeType);
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if( tag.isEmpty) {
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continue;
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}
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if( tag[0] == "e") {
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eTagsRead.add(tag[1]);
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} else {
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if( tag[0] == "p") {
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pTagsRead.add(tag[1]);
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}
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}
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List<String> t = [];
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t.add(tag[0]);
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t.add(tag[1]);
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tagsRead.add(t);
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// TODO add other tags
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}
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}
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}
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if(gDebug >= 2 ) {
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print("----------------------------------------Creating EventData with content: ${json['content']}");
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}
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if( json['id'] == gCheckEventId) {
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if(gDebug > 0) print("In Event fromJson: got message: $gCheckEventId");
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}
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return EventData(json['id'] as String, json['pubkey'] as String,
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json['created_at'] as int, json['kind'] as int,
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json['content'].trim() as String,
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eTagsRead, pTagsRead,
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contactList, tagsRead,
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{});
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}
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String expandMentions(String content) {
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if( tags.isEmpty) {
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return content;
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}
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// just check if there is any square bracket in comment, if not we return
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String squareBracketStart = "[", squareBracketEnd = "]";
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if( !content.contains(squareBracketStart) || !content.contains(squareBracketEnd) ) {
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return content;
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}
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// replace the patterns
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List<String> placeHolders = ["#[0]", "#[1]", "#[2]", "#[3]", "#[4]", "#[5]", "#[6]", "#[7]" ];
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for(int i = 0; i < placeHolders.length && i < tags.length; i++) {
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int index = -1;
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Pattern p = placeHolders[i];
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if( (index = content.indexOf(p)) != -1 ) {
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if( tags[i].length >= 2) {
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String author = getAuthorName(tags[i][1]);
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content = "${content.substring(0, index)} @$author${content.substring(index + 4)}";
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}
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}
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}
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return content;
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}
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void translateAndExpandMentions() {
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if (content == "") {
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return;
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}
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if( evaluatedContent == "") {
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evaluatedContent = expandMentions(content);
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if( gTranslate && !evaluatedContent.isEnglish()) {
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if( gDebug > 0) print("found that this comment is non-English: $evaluatedContent");
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//final input = "Здравствуйте. Ты в порядке?";
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// Using the Future API
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if( DateTime.fromMillisecondsSinceEpoch(createdAt *1000).compareTo( DateTime.now().subtract(Duration(days:gNumTranslateDays)) ) > 0 ) {
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if( gDebug > 0) print("Sending google request: translating $content");
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try {
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translator
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.translate(content, to: 'en')
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//.catchError( (error, stackTrace) => null )
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.then( (result) => { evaluatedContent = "$evaluatedContent\n\nTranslation: ${result.toString()}" , if( gDebug > 0) print("Google translate returned successfully for one call.")}
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);
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} on Exception catch(err) {
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if( gDebug >= 0) print("Info: Error in trying to use google translate: $err");
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}
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}
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}
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}
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}
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// only applicable for kind 42 event
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String getChatRoomId() {
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if( kind != 42) {
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return "";
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}
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return getParent();
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}
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// prints event data in the format that allows it to be shown in tree form by the Tree class
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void printEventData(int depth) {
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if( id == gCheckEventId) {
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if(gDebug > 0) {
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print("In Event printEventData: got message: $gCheckEventId");
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isNotification = true;
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}
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}
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int n = 4;
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String maxN(String v) => v.length > n? v.substring(0,n) : v.substring(0, v.length);
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void printInColor(String s, String commentColor) => stdout.supportsAnsiEscapes ?stdout.write("$commentColor$s$gColorEndMarker"):stdout.write(s);
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String strDate = getPrintableDate(createdAt);
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if( createdAt == 0) {
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print("debug: createdAt == 0 for event $content");
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}
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String contentShifted = rightShiftContent(evaluatedContent==""?content: evaluatedContent, gSpacesPerDepth * depth + 10);
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printDepth(depth);
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stdout.write("+-------+\n");
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printDepth(depth);
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String name = getAuthorName(pubkey);
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stdout.write("|Author : $name id: ${maxN(id)} Time: $strDate\n");
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printReaction(depth); // only prints if there are any likes/reactions
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printDepth(depth);
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stdout.write("|Message: ");
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if( isNotification) {
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printInColor(contentShifted, gNotificationColor);
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isNotification = false;
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} else {
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printInColor(contentShifted, gCommentColor);
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}
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}
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String getAsLine({int len = 20}) {
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if( len == 0 || len > content.length) {
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len = content.length;
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}
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return '"${content.substring(0, len)}..." - ${getAuthorName(pubkey)}';
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}
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// looks up global map of reactions, if this event has any reactions, and then prints the reactions
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// in appropriate color( in case one is a notification, which is stored in member variable)
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void printReaction(int depth) {
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if( gReactions.containsKey(id)) {
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String reactorNames = "|Likes : ";
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printDepth(depth);
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//print("All Likes:");
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int numReactions = gReactions[id]?.length??0;
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List<List<String>> reactors = gReactions[id]??[];
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for( int i = 0; i <numReactions; i++) {
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String reactorId = reactors[i][0];
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if( newLikes.contains(reactorId)) {
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// colorify
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reactorNames += gNotificationColor + getAuthorName(reactorId) + gColorEndMarker;
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} else {
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reactorNames += getAuthorName(reactorId);
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}
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if( i < numReactions -1) {
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reactorNames += ", ";
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}
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}
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print(reactorNames);
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newLikes.clear();
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}
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}
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@override
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String toString() {
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if( id == "non") {
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return '';
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}
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String max3(String v) => v.length > 3? v.substring(0,3) : v.substring(0, v.length);
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DateTime dTime = DateTime.fromMillisecondsSinceEpoch(createdAt *1000);
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if( createdAt == 0) {
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print("createdAt == 0 for event $content");
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}
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return '\n-------+-------------\nAuthor : ${max3(pubkey)}\nMessage: $content\n\nid : ${max3(id)} Time: $dTime Kind: $kind';
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}
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}
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// This is mostly a placeholder for EventData. TODO combine both?
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class Event {
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String event;
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String id;
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EventData eventData;
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String originalJson;
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List<String> seenOnRelays;
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Event(this.event, this.id, this.eventData, this.seenOnRelays, this.originalJson);
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@override
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bool operator ==( other) {
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return (other is Event) && eventData.id == other.eventData.id;
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}
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factory Event.fromJson(String d, String relay) {
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try {
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dynamic json = jsonDecode(d);
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if( json.length < 3) {
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String e = "";
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e = json.length > 1? json[0]: "";
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return Event(e,"",EventData("non","", 0, 0, "", [], [], [], [[]], {}), [relay], "[json]");
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}
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return Event(json[0] as String, json[1] as String, EventData.fromJson(json[2]), [relay], d );
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} on Exception catch(e) {
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if( gDebug> 0) {
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print("Could not create event. returning dummy event. $e");
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}
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return Event("","",EventData("non","", 0, 0, "", [], [], [], [[]], {}), [relay], "[json]");
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}
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}
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void printEvent(int depth) {
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eventData.printEventData(depth);
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//stdout.write("\n$originalJson \n");
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}
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@override
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String toString() {
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return '$eventData Seen on: ${seenOnRelays[0]}\n';
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}
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}
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void addToHistogram(Map<String, int> histogram, List<String> pTags) {
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Set tempPtags = {};
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pTags.retainWhere((x) => tempPtags.add(x));
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for(int i = 0; i < pTags.length; i++ ) {
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String pTag = pTags[i];
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if( histogram.containsKey(pTag)) {
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int? val = histogram[pTag];
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if( val != null) {
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histogram[pTag] = ++val;
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} else {
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}
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} else {
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histogram[pTag] = 1;
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}
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}
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//return histogram;
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}
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class HistogramEntry {
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String str;
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int count;
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HistogramEntry(this.str, this.count);
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static int histogramSorter(HistogramEntry a, HistogramEntry b) {
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if( a.count < b.count ) {
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return 1;
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} if( a.count == b.count ) {
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return 0;
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} else {
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return -1;
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}
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}
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}
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// return the numMostFrequent number of most frequent p tags ( user pubkeys) in the given events
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List<String> getpTags(Set<Event> events, int numMostFrequent) {
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List<HistogramEntry> listHistogram = [];
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Map<String, int> histogramMap = {};
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for(var event in events) {
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addToHistogram(histogramMap, event.eventData.pTags);
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}
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histogramMap.forEach((key, value) {listHistogram.add(HistogramEntry(key, value));/* print("added to list of histogramEntry $key $value"); */});
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listHistogram.sort(HistogramEntry.histogramSorter);
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List<String> ptags = [];
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for( int i = 0; i < listHistogram.length && i < numMostFrequent; i++ ) {
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//print ( "${listHistogram[i].str} ${listHistogram[i].count} ");
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ptags.add(listHistogram[i].str);
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}
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return ptags;
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}
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Set<Event> readEventsFromFile(String filename) {
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Set<Event> events = {};
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final File file = File(filename);
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// sync read
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try {
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List<String> lines = file.readAsLinesSync();
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for( int i = 0; i < lines.length; i++ ) {
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Event e = Event.fromJson(lines[i], "");
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events.add(e);
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}
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} on Exception catch(e) {
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//print("cannot open file $gEventsFilename");
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if( gDebug > 0) print("Could not open file. error = $e");
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}
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return events;
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}
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// From the list of events provided, lookup the lastst contact information for the given user/pubkey
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Event? getContactEvent(String pubkey) {
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// get the latest kind 3 event for the user, which lists his 'follows' list
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if( gKindONames.containsKey(pubkey)) {
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Event? e = (gKindONames[pubkey]?.latestContactEvent)??null;
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return e;
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}
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return null;
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}
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// for the user userPubkey, returns the relay of its contact contactPubkey
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String getRelayOfUser(String userPubkey, String contactPubkey) {
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if(gDebug > 0) print("In getRelayOfUser: Searching relay for contact $contactPubkey" );
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String relay = "";
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if( userPubkey == "" || contactPubkey == "") {
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return "";
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}
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if( gContactLists.containsKey(userPubkey)) {
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List<Contact>? contacts = gContactLists[userPubkey];
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if( contacts != null) {
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for( int i = 0; i < contacts.length; i++) {
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//if( gDebug > 0) print( contacts[i].toString() );
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if( contacts[i].id == contactPubkey) {
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relay = contacts[i].relay;
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//if(gDebug > 0) print("In getRelayOfUser: found relay $relay for contact $contactPubkey" );
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return relay;
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}
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}
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}
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}
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// if not found return empty string
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return relay;
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}
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// If given event is kind 0 event, then populates gKindONames with that info
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// returns true if entry was created or modified, false otherwise
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bool processKind0Event(Event e) {
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if( e.eventData.kind != 0) {
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return false;
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}
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String content = e.eventData.content;
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if( content.isEmpty) {
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return false;
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}
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String name = "";
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String about = "";
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String picture = "";
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try {
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dynamic json = jsonDecode(content);
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name = json["name"];
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about = json["about"];
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picture = json["picture"];
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} catch(ex) {
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//if( gDebug != 0) print("Warning: In processKind0Event: caught exception for content: ${e.eventData.content}");
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if( name.isEmpty) {
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//return false;
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}
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}
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bool newEntry = false, entryModified = false;
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if( !gKindONames.containsKey(e.eventData.pubkey)) {
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gKindONames[e.eventData.pubkey] = UserNameInfo(e.eventData.createdAt, name, about, picture, null);
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newEntry = true;;
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} else {
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int oldTime = gKindONames[e.eventData.pubkey]?.createdAt??0;
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if( oldTime < e.eventData.createdAt) {
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Event? oldContactEvent = gKindONames[e.eventData.pubkey]?.latestContactEvent;
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gKindONames[e.eventData.pubkey] = UserNameInfo(e.eventData.createdAt, name, about, picture, oldContactEvent);
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entryModified = true;;
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}
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}
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if(gDebug > 0) {
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print("At end of processKind0Events: for name = $name ${newEntry? "added entry": ( entryModified?"modified entry": "No change done")} ");
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}
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return newEntry || entryModified;
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}
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// If given event is kind 3 event, then populates gKindONames with contact info
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// returns true if entry was created or modified, false otherwise
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bool processKind3Event(Event newContactEvent) {
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if( newContactEvent.eventData.kind != 3) {
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return false;
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}
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bool newEntry = false, entryModified = false;
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if( !gKindONames.containsKey(newContactEvent.eventData.pubkey)) {
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gKindONames[newContactEvent.eventData.pubkey] = UserNameInfo(null, null, null, null, newContactEvent, newContactEvent.eventData.createdAt);
|
|
newEntry = true;;
|
|
} else {
|
|
// if entry already exists, then check its old time and update only if we have a newer entry now
|
|
int oldTime = gKindONames[newContactEvent.eventData.pubkey]?.createdAtKind3??0;
|
|
if( oldTime < newContactEvent.eventData.createdAt) {
|
|
int? createdAt = gKindONames[newContactEvent.eventData.pubkey]?.createdAt??null;
|
|
String? name = gKindONames[newContactEvent.eventData.pubkey]?.name, about = gKindONames[newContactEvent.eventData.pubkey]?.about, picture = gKindONames[newContactEvent.eventData.pubkey]?.picture;
|
|
|
|
gKindONames[newContactEvent.eventData.pubkey] = UserNameInfo(createdAt, name, about, picture, newContactEvent, newContactEvent.eventData.createdAt );
|
|
entryModified = true;;
|
|
}
|
|
}
|
|
|
|
if(gDebug > 0) {
|
|
print("At end of processKind3Events: ${newEntry? "added entry": ( entryModified?"modified entry": "No change done")} ");
|
|
}
|
|
return newEntry || entryModified;
|
|
}
|
|
|
|
|
|
// returns name by looking up global list gKindONames, which is populated by kind 0 events
|
|
String getAuthorName(String pubkey) {
|
|
String max3(String v) => v.length > 3? v.substring(0,3) : v.substring(0, v.length);
|
|
String name = gKindONames[pubkey]?.name??max3(pubkey);
|
|
return name;
|
|
}
|
|
|
|
// returns full public key(s) for the given username( which can be first few letters of pubkey, or the user name)
|
|
Set<String> getPublicKeyFromName(String userName) {
|
|
Set<String> pubkeys = {};
|
|
|
|
if(gDebug > 0) print("In getPublicKeyFromName: doing lookup for $userName len of gKindONames= ${gKindONames.length}");
|
|
|
|
gKindONames.forEach((pk, value) {
|
|
// check both the user name, and the pubkey to search for the user
|
|
if( userName == value.name) {
|
|
pubkeys.add(pk);
|
|
}
|
|
|
|
if( userName.length <= pk.length) {
|
|
if( pk.substring(0, userName.length) == userName) {
|
|
pubkeys.add(pk);
|
|
}
|
|
}
|
|
});
|
|
|
|
return pubkeys;
|
|
}
|
|
|
|
// returns the seconds since eponch N days ago
|
|
int getSecondsDaysAgo( int N) {
|
|
return DateTime.now().subtract(Duration(days: N)).millisecondsSinceEpoch ~/ 1000;
|
|
}
|
|
|
|
|
|
|
|
|
|
void printUnderlined(String x) => { print("$x\n${getNumDashes(x.length)}")};
|
|
|
|
void printDepth(int d) {
|
|
for( int i = 0; i < gSpacesPerDepth * d + gNumLeftMarginSpaces; i++) {
|
|
stdout.write(" ");
|
|
}
|
|
}
|
|
|
|
String getNumSpaces(int num) {
|
|
String s = "";
|
|
for( int i = 0; i < num; i++) {
|
|
s += " ";
|
|
}
|
|
return s;
|
|
}
|
|
|
|
String getNumDashes(int num) {
|
|
String s = "";
|
|
for( int i = 0; i < num; i++) {
|
|
s += "-";
|
|
}
|
|
return s;
|
|
}
|
|
|
|
String rightShiftContent(String s, int numSpaces) {
|
|
String newString = "";
|
|
int newlineCounter = 0;
|
|
String spacesString = getNumSpaces(numSpaces + gNumLeftMarginSpaces);
|
|
|
|
for(int i = 0; i < s.length; i++) {
|
|
if( s[i] == '\n') {
|
|
newString += "\n";
|
|
newString += spacesString;
|
|
newlineCounter = 0;
|
|
} else {
|
|
if( newlineCounter >= (gTextWidth - numSpaces)) {
|
|
newString += "\n";
|
|
newString += spacesString;
|
|
newlineCounter = 0;
|
|
}
|
|
newString += s[i];
|
|
}
|
|
newlineCounter++;
|
|
}
|
|
return newString;
|
|
}
|
|
|
|
bool nonEnglish(String str) {
|
|
bool result = false;
|
|
return result;
|
|
}
|
|
|
|
bool isNumeric(String s) {
|
|
return double.tryParse(s) != null;
|
|
}
|
|
|
|
bool isWhitespace(String s) {
|
|
if( s.length != 1) {
|
|
return false;
|
|
}
|
|
return s[0] == ' ' || s[0] == '\n' || s[0] == '\r' || s[0] == '\t';
|
|
}
|
|
|
|
|
|
extension StringX on String {
|
|
isChannelPageNumber(int max) {
|
|
|
|
int? n = int.tryParse(this);
|
|
if( n != null) {
|
|
if( n < max)
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
isEnglish( ) {
|
|
// since smaller words can be smileys they should not be translated
|
|
if( length < 10)
|
|
return true;
|
|
|
|
if( !isLatinAlphabet())
|
|
return false;
|
|
|
|
if (isFrench())
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
bool isFrench() {
|
|
|
|
// https://www.thoughtco.com/most-common-french-words-1372759
|
|
List<String> frenchWords = ["oui", "je", "le", "un", "de", "et", "merci", "une", "ce", "pas"];
|
|
for( int i = 0; i < frenchWords.length; i++) {
|
|
if( this.toLowerCase().contains(" ${frenchWords[i]} ")) {
|
|
if( gDebug > 0) print("isFrench: Found ${this.toString()} is french");
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
isLatinAlphabet({caseSensitive = false}) {
|
|
int countLatinletters = 0;
|
|
for (int i = 0; i < length; i++) {
|
|
final target = caseSensitive ? this[i] : this[i].toLowerCase();
|
|
if ( (target.codeUnitAt(0) > 96 && target.codeUnitAt(0) < 123) || ( isNumeric(target) ) || isWhitespace(target)) {
|
|
countLatinletters++;
|
|
}
|
|
}
|
|
|
|
if( countLatinletters < ( 40.0/100 ) * length ) {
|
|
if( gDebug > 0) print("in isLatinAlphabet: latin letters: $countLatinletters and total = $length ");
|
|
return false;
|
|
} else {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
// The contact only stores id and relay of contact. The actual name is stored in a global variable/map
|
|
class Contact {
|
|
String id, relay;
|
|
Contact(this.id, this.relay);
|
|
|
|
@override
|
|
String toString() {
|
|
return 'id: $id ( ${getAuthorName(id)}) relay: $relay';
|
|
}
|
|
}
|
|
|
|
String addEscapeChars(String str) {
|
|
return str.replaceAll("\"", "\\\"");
|
|
}
|
|
|
|
String getShaId(String pubkey, int createdAt, String kind, String strTags, String content) {
|
|
String buf = '[0,"$pubkey",$createdAt,$kind,[$strTags],"$content"]';
|
|
var bufInBytes = utf8.encode(buf);
|
|
var value = sha256.convert(bufInBytes);
|
|
return value.toString();
|
|
}
|
|
|
|
// get printable date from seconds since epoch
|
|
String getPrintableDate(int createdAt) {
|
|
final df1 = DateFormat('hh:mm a');
|
|
final df2 = DateFormat(DateFormat.ABBR_MONTH_DAY);
|
|
String strDate = df1.format(DateTime.fromMillisecondsSinceEpoch(createdAt*1000));
|
|
strDate += " ${df2.format(DateTime.fromMillisecondsSinceEpoch(createdAt*1000))}";
|
|
return strDate;
|
|
}
|