added overwrite flag. improved chat display.

README.md

@@ -47,6 +47,10 @@ usage: dart run bin/nostr_console.dart [OPTIONS]
       -y, --difficulty <number>     The difficulty number in bits, only for kind 1 messages. Tne next larger number divisible by 4 is 
                                     taken as difficulty. Can't be more than 24 bits, because otherwise it typically takes too much 
                                     time. Minimum and default is 0, which means no difficulty.
+      -v, --overwrite               Will over write the file with all the events that were read from file, and all newly received. Is
+                                    useful when the file has to be cleared of old unused events. A backup should be made just in case
+                                    of original file before invoking.
+
 ```                                
 
 To get ALL the latest messages for last 3 days (on linux which allows backtick execution): 

bin/nostr_console.dart

@@ -24,6 +24,7 @@ const String disableFileArg = "disable-file";
 const String difficultyArg  = "difficulty";
 const String translateArg = "translate";
 const String colorArg     = "color";
+const String overWriteFlag = "overwrite";
 
 void printUsage() {
   print(gUsage);
@@ -44,6 +45,7 @@ Future<void> main(List<String> arguments) async {
                               ..addFlag(translateArg, abbr: "t", defaultsTo: false)
                               ..addOption(colorArg, abbr:"c")
                               ..addOption(difficultyArg, abbr:"y")
+                              ..addFlag(overWriteFlag, abbr:"v", defaultsTo: false)
                               ..addFlag("debug");
     try {
       ArgResults argResults = parser.parse(arguments);
@@ -56,6 +58,11 @@ Future<void> main(List<String> arguments) async {
         gDebug = 1;
       }
 
+      if( argResults[overWriteFlag]) {
+        print("Going to overwrite file at the end of program execution.");
+        gOverWriteFile = true;
+      }
+
 
       if( argResults[translateArg]) {
         gTranslate = true;

lib/console_ui.dart

@@ -88,19 +88,16 @@ Future<void> sendChatMessage(Store node, String channelId, String messageToSend)
   sendRequest( gListRelayUrls, toSendMessage);
 }
 
-// is same as above. remove it TODO
+// send DM
 Future<void> sendDirectMessage(Store node, String otherPubkey, String messageToSend) async {
   String otherPubkey02 = "02" + otherPubkey;
   String encryptedMessageToSend =        myEncrypt(userPrivateKey, otherPubkey02, messageToSend);
 
-
+/*  int ivIndex = encryptedMessageToSend.indexOf("?iv=");
-  //print("encrypted = $encryptedMessageToSend");
-  int ivIndex = encryptedMessageToSend.indexOf("?iv=");
   var iv = encryptedMessageToSend.substring( ivIndex + 4, encryptedMessageToSend.length);
   var enc_str = encryptedMessageToSend.substring(0, ivIndex);
-  //print("enc_str = $enc_str len = ${enc_str.length}          iv = $iv len = ${iv.length}");
   String decrypted = myPrivateDecrypt(userPrivateKey, otherPubkey02, enc_str, iv);
-  //print( "decrypted = |$decrypted|");;
+*/
 
   String replyKind = "4";
   String strTags = '["p","$otherPubkey"]';
@@ -109,9 +106,7 @@ Future<void> sendDirectMessage(Store node, String otherPubkey, String messageToS
 
   String id = getShaId(userPublicKey, createdAt, replyKind, strTags, encryptedMessageToSend);
   String sig = sign(userPrivateKey, id, "12345612345612345612345612345612");
-
   String eventStrToSend = '["EVENT",{"id":"$id","pubkey":"$userPublicKey","created_at":$createdAt,"kind":$replyKind,"tags":[$strTags],"content":"$encryptedMessageToSend","sig":"$sig"}]';
-  //print(toSendMessage);
  
   sendRequest( gListRelayUrls, eventStrToSend);
 }

lib/event_ds.dart

@@ -310,19 +310,28 @@ class EventData {
 
   String getAsLine({int len = 20}) {
     String contentToPrint = evaluatedContent.isEmpty? content: evaluatedContent;
+    //print("$contentToPrint|");
+    //print("len = ${contentToPrint.length}");
     if( len == 0 || len > contentToPrint.length) {
       len = contentToPrint.length;
     }
     
+    contentToPrint = contentToPrint.padLeft(len);
     contentToPrint = contentToPrint.replaceAll("\n", " ");
     contentToPrint = contentToPrint.replaceAll("\r", " ");
-    String strToPrint = '"${contentToPrint.substring(0, len)}..." - ${getAuthorName(pubkey)}';
+    String strToPrint = '${contentToPrint.substring(0, len)}... - ${getAuthorName(pubkey)}';
     if( isNotification) {
       strToPrint = "$gNotificationColor$strToPrint$gColorEndMarker";
       isNotification = false;
     }
 
-    return strToPrint;
+    int strWidth = 40;
+    String paddedStrToPrint = strToPrint.padLeft(strWidth);
+    //print("\n$paddedStrToPrint");
+    paddedStrToPrint = paddedStrToPrint.substring(0, strWidth);
+
+    //print("\nstrToPrint = $strToPrint len = ${strToPrint.length}  paddedStrToPrint = $paddedStrToPrint len = ${paddedStrToPrint.length}");
+    return paddedStrToPrint;
   }
 
   String getStrForChannel(int depth) {
@@ -343,7 +352,7 @@ class EventData {
       tempEvaluatedContent = tempContent = content; // content would be changed so show that 
     }
 
-    const int nameWidthDepth = 3; // how wide name will be in depth spaces
+    const int nameWidthDepth = 2; // how wide name will be in depth spaces
     const int timeWidthDepth = 2;
     int nameWidth = gSpacesPerDepth * nameWidthDepth;
     String nameToPrint = name.padLeft(nameWidth).substring(0, nameWidth);
@@ -949,7 +958,7 @@ try {
   offset += cipherImpl.doFinal(cipherText, offset, finalPlainText, offset);
   assert(offset == cipherText.length);
 
-  return  finalPlainText.sublist(0, finalPlainText.length);
+  return  finalPlainText.sublist(0, offset);
 } catch(e) {
     //print("cannot open file $gEventsFilename");
     if( gDebug >= 0) print("Decryption error =  $e");

lib/settings.dart

@@ -7,10 +7,12 @@ String gCheckEventId = ""; //"1763016774ceaa8c135dce01e77923994c5afad4cd3e126704
 
 const int gDefaultNumWaitSeconds = 3000; // is used in main()
 
+//////////////////////////////////////////////////////////////////////////////////////////////////////////////// file related settings 
 const String gDefaultEventsFilename = "all_nostr_events.txt";
 String       gEventsFilename        = ""; // is set in arguments, and if set, then file is read from and written to
 bool         gDontWriteOldEvents    = true;
 const int gDontSaveBeforeDays       = 100; // dont save events older than this many days if gDontWriteOldEvents flag is true
+bool         gOverWriteFile         = false; // overwrite the file, and don't just append. Will write all events in memory. 
 
 
 const int gDaysToGetEventsFor       = 100; // when getting events, this is the since field (unless a fully formed request is given in command line)
@@ -156,6 +158,9 @@ usage: $exename [OPTIONS]
       -y, --difficulty <number>     The difficulty number in bits, only for kind 1 messages. Tne next larger number divisible by 4 is 
                                     taken as difficulty. Can't be more than 24 bits, because otherwise it typically takes too much 
                                     time. Minimum and default is 0, which means no difficulty.
+      -v, --overwrite               Will over write the file with all the events that were read from file, and all newly received. Is
+                                    useful when the file has to be cleared of old unused events. A backup should be made just in case
+                                    of original file before invoking.
 """;
 
 const String helpAndAbout = 

lib/tree_ds.dart

@@ -839,13 +839,14 @@ class Store {
       int numMessages = value.messageIds.length;
       stdout.write("${name} ${getNumSpaces(32-name.length)}          $numMessages${getNumSpaces(12- numMessages.toString().length)}"); 
 
-      // print latest event in one lin
+      // print latest event in one line
       List<String> messageIds = value.messageIds;
       for( int i = messageIds.length - 1; i >= 0; i++) {
         if( allChildEventsMap.containsKey(messageIds[i])) {
           Event? e = allChildEventsMap[messageIds[i]]?.event;
           if( e!= null) {
-            stdout.write("${e.eventData.getAsLine()}");
+            String line = e.eventData.getAsLine();
+            stdout.write(line);
             break; // print only one event, the latest one
           }
         }
@@ -984,6 +985,10 @@ class Store {
     try {
       final File file         = File(filename);
       
+      if( gOverWriteFile) {
+        await  file.writeAsString("", mode: FileMode.write).then( (file) => file);
+      }
+
       //await  file.writeAsString("", mode: FileMode.append).then( (file) => file);
       int        eventCounter = 0;
       String     nLinesStr    = "";
@@ -993,10 +998,16 @@ class Store {
       int        linesWritten = 0;
       for( var tree in allChildEventsMap.values) {
 
-        if( tree.event.readFromFile || tree.event.eventData.isDeleted) { // ignore those already in file; only the new ones are writen/appended to file, or those deleted
+        if( tree.event.eventData.isDeleted) { // dont write those deleted
           continue; 
         }
 
+        if( gOverWriteFile == false) {
+          if( tree.event.readFromFile) { // ignore those already in file; only the new ones are writen/appended to file
+            continue;
+          }
+        }
+
         // only write if its not too old
         if( gDontWriteOldEvents) {
           if( tree.event.eventData.createdAt <  getSecondsDaysAgo(gDontSaveBeforeDays)) {

pubspec.yaml

@@ -4,7 +4,7 @@ version: 0.0.7-beta
 homepage: https://github.com/vishalxl/nostr_console 
 
 
-# colored new chat msgs
+# improved display
 
 environment:
   sdk: '>=2.17.3 <3.0.0'