added options align and width, which control display. now text can be left or center aligned. default is center. fixed issue with dashes when re-aligning tree

bin/nostr_console.dart

@@ -23,6 +23,8 @@ const String prikeyArg   = "prikey";
 const String lastdaysArg = "days";
 const String relayArg    = "relay";
 const String helpArg     = "help";
+const String alignArg    = "align"; // can be "left"
+const String widthArg     = "width";
 
 // By default the threads that were started in last one day are shown
 // this can be changed with 'days' command line argument
@@ -38,9 +40,13 @@ usage: $exename [OPTIONS]
       --prikey  <private key>   The hex private key of user whose events and feed are shown. Also used to sign events 
                                 sent. Default is a hard-coded well known private key. Same as -p
       --relay   <relay wss url> The relay url that is used as main relay. Default is $defaultServerUrl . Same as -r
-      --days    <N>             The latest number of days for which events are shown. Default is 1. Same as -d
+      --days    <N as num>      The latest number of days for which events are shown. Default is 1. Same as -d
       --request <REQ string>    This request is sent verbatim to the default relay. It can be used to recieve all events
                                 from a relay. If not provided, then events for default or given user are shown. Same as -q
+      --align  <left>           When "left" is given as option to this argument, then the text is aligned to left. By default
+                                the posts or text is aligned to the center of the terminal. Same as -a 
+      --width  <width as num>   This specifies how wide you want the text to be, in number of columns. Default is 80. 
+                                Cant be less than $gMinValidScreenWidth. Same as -c
       --help                    Print this usage message and exit. Same as -h
       
 """;
@@ -116,7 +122,11 @@ Future<void> terminalMenuUi(Tree node, var contactList) async {
       print('You picked: $option');
       switch(option) {
         case 1:
-          //print("in display events option");
+          // align the text again in case the window size has been changed
+          if( gAlignment == "center") {
+            gNumLeftMarginSpaces = (stdout.terminalColumns - 80 )~/2;
+          }
+
           node.printTree(0, true, DateTime.now().subtract(Duration(days:numLastDays)));
           break;
 
@@ -161,7 +171,8 @@ Future<void> main(List<String> arguments) async {
     
     final parser = ArgParser()..addOption(requestArg, abbr: 'q') ..addOption(prikeyArg, abbr:"p")
                               ..addOption(lastdaysArg, abbr:"d") ..addOption(relayArg, abbr:"r")
-                              ..addFlag(helpArg, abbr:"h", defaultsTo: false);
+                              ..addFlag(helpArg, abbr:"h", defaultsTo: false)..addOption(alignArg, abbr:"a")
+                              ..addOption(widthArg, abbr:"c");
 
     try {
       ArgResults argResults = parser.parse(arguments);
@@ -179,12 +190,34 @@ Future<void> main(List<String> arguments) async {
         userPrivateKey = argResults[prikeyArg];
         userPublicKey = getPublicKey(userPrivateKey);
       }
-      if( argResults[lastdaysArg] != null) {
 
+      if( argResults[lastdaysArg] != null) {
         numLastDays =  int.parse(argResults[lastdaysArg]);
         print("Going to show posts for last $numLastDays days");
       }
 
+      if( argResults[widthArg] != null) {
+        int tempScreenWidth = int.parse(argResults[widthArg]);
+        if( tempScreenWidth < gMinValidScreenWidth ) {
+          print("Screen-width cannot be less than $gMinValidScreenWidth. Going to use the defalt value of $screenWidth");
+        } else {
+          print("Going to use $screenWidth columns for text on screen.");
+          screenWidth = tempScreenWidth;
+        }
+      }
+
+      // can be computed only after screenWidth has been found
+      gNumLeftMarginSpaces = (stdout.terminalColumns - 80 )~/2;
+      
+      // undo above if left option is given
+      if( argResults[alignArg] != null) {
+        if( argResults[alignArg] == "left" ) {
+          print("Going to align to left.");
+          gAlignment = "left";
+          gNumLeftMarginSpaces = 0;
+        } 
+      }
+
       if( argResults[requestArg] != null) {
         stdout.write("Got argument request ${argResults[requestArg]}");
         sendRequest("wss://nostr-pub.wellorder.net", argResults[requestArg]);

lib/event_ds.dart

@@ -2,15 +2,21 @@ import 'dart:io';
 import 'dart:convert';
 import 'package:intl/intl.dart';
 
-const int  screenWidth = 120;
+const int  gMinValidScreenWidth = 60;
+const int  defaultScreenWidth = 80;
+int        screenWidth = defaultScreenWidth;
 const int  spacesPerDepth = 8;
+int        gNumLeftMarginSpaces = 0; // this number is modified in main 
+String     gAlignment = "center"; // is modified in main if --align argument is given
 
-const int maxDepthAllowed      = 7;
+const int maxDepthAllowed      = 4;
-const int leftShiftThreadsBy = 3;
+const int leftShiftThreadsBy = 2;
 
 // 33 yellow, 31 red, 34 blue, 35 magenta. Add 60 for bright versions. 
 const String commentColor = "\x1B[32m"; // green
 const String notificationColor = "\x1b[36m"; // cyan
+const String warningColor = "\x1B[31m"; // red
+const String colorEndMarker = "\x1B[0m";
 
 //String defaultServerUrl = 'wss://relay.damus.io';
 String defaultServerUrl = 'wss://nostr-relay.untethr.me';
@@ -26,19 +32,32 @@ List<String> gBots = [  "3b57518d02e6acfd5eb7198530b2e351e5a52278fb2499d14b66db2
 int gDebug = 0;
 
 void printDepth(int d) {
-  for( int i = 0; i < spacesPerDepth * d ; i++) {
+  for( int i = 0; i < spacesPerDepth * 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 = "";
+  String spacesString = getNumSpaces(numSpaces + gNumLeftMarginSpaces);
-
-  for( int i = 0; i < numSpaces ; i++) {
-    spacesString += " ";
-  }
 
   for(int i = 0; i < s.length; i++) {
     if( s[i] == '\n') {
@@ -182,7 +201,7 @@ class EventData {
   void printEventData(int depth) {
     int n = 3;
     String maxN(String v)       => v.length > n? v.substring(0,n) : v.substring(0, v.length);
-    void   printGreen(String s, String commentColor) => stdout.supportsAnsiEscapes ?stdout.write("$commentColor$s\x1B[0m"):stdout.write(s);
+    void   printGreen(String s, String commentColor) => stdout.supportsAnsiEscapes ?stdout.write("$commentColor$s$colorEndMarker"):stdout.write(s);
 
     DateTime dTime = DateTime.fromMillisecondsSinceEpoch(createdAt *1000);
     

lib/relays.dart

@@ -56,7 +56,7 @@ class Relays {
       }
     }
 
-    // following is too restrictive. TODO improve it
+    // following is too restrictive casuse changed sinceWhen is not considered. TODO improve it
     for(int i = 0; i < users.length; i++) {
       if( users[i] == publicKey) {
         return;
@@ -118,8 +118,8 @@ class Relays {
                   print( 'exception in fromJson for event');
                 }
               },
-              onError: (e) { print("in onError"); print(e);  },
+              onError: (e) { print("\n${warningColor}Warning: In SendRequest creating connection onError. Kindly check your internet connection or change the relay by command line --relay=<relay wss url>"); print(colorEndMarker); },
-              onDone:  () { print('in onDone'); }
+              onDone:  () { print('Info: In onDone'); }
         );
       } on WebSocketException {
         print('WebSocketException exception');
@@ -172,8 +172,6 @@ class Relays {
     relays.forEach((key, value) {
       print("for relay: $key");
       print("$value\n");
-
-
       String? reason = value.closeReason;
       print( reason??"reason not found");
     });
@@ -214,7 +212,6 @@ void getMultiUserEvents(serverUrl, publicKeys, numUserEvents) {
   relays.getMultiUserEvents(serverUrl, publicKeys, numUserEvents);
 }
 
-
 void sendRequest(serverUrl, request) {
   relays.sendRequest(serverUrl, request);
 }

lib/tree_ds.dart

@@ -34,8 +34,8 @@ class Tree {
            mAllEvents[parentId]?.addChildNode(value); // in this if condition this will get called
         } else {
            // in case where the parent of the new event is not in the pool of all events, 
-           // then we create a dummy event and put it at top ( or make this a top event?)
+           // then we create a dummy event and put it at top ( or make this a top event?) TODO handle so that this can be replied to, and is fetched
-           Tree dummyTopNode = Tree(Event("","",EventData("Unk","Non", value.e.eventData.createdAt , 0, "Unknown/Dummy Event", [], [], [], [[]]), [""], "[json]"), [], {}, []);
+           Tree dummyTopNode = Tree(Event("","",EventData("Unk" ,"Non", value.e.eventData.createdAt , 0, "Unknown parent event", [], [], [], [[]]), [""], "[json]"), [], {}, []);
            dummyTopNode.addChildNode(value);
            tempWithoutParent.add(value.e.eventData.id); 
           
@@ -142,8 +142,7 @@ class Tree {
       if( depth > maxDepthAllowed) {
         depth = maxDepthAllowed - leftShiftThreadsBy;
         printDepth(depth+1);
-        stdout.write("+-------------------------------+\n");
+        stdout.write("+${getNumDashes((leftShiftThreadsBy + 1) * 8 - 1)}+\n");        
-        
       }
       children[i].printTree(depth+1, false, newerThan);
     }
@@ -225,6 +224,11 @@ class Tree {
       }
     }
     
+    if( latestEventId.isEmpty) {
+      // search for it in the dummy event id's
+
+    }
+
     //print("latestEventId = $latestEventId");
     if( latestEventId.isNotEmpty) {
       strTags =  '["e","$latestEventId"]';