From f4df6d0d3b4f9142fd91fc04b6553de417724df5 Mon Sep 17 00:00:00 2001
From: Jaidyn Ann <jadedctrl@teknik.io>
Date: Fri, 9 Jul 2021 10:39:48 -0500
Subject: [PATCH] Typing auto-complete for usernames

---
 application/views/SendTextView.cpp | 51 +++++++++++++++++++++++++++++-
 application/views/SendTextView.h   |  5 +++
 protocols/Makefile                 |  2 +-
 3 files changed, 56 insertions(+), 2 deletions(-)

diff --git a/application/views/SendTextView.cpp b/application/views/SendTextView.cpp
index c2c1654..439a4c7 100644
--- a/application/views/SendTextView.cpp
+++ b/application/views/SendTextView.cpp
@@ -5,6 +5,7 @@
 
 #include "SendTextView.h"
 
+#include <StringList.h>
 #include <Window.h>
 
 #include "AppMessages.h"
@@ -13,7 +14,8 @@
 SendTextView::SendTextView(const char* name, ConversationView* convView)
 	:
 	BTextView(name),
-	fConversationView(convView)
+	fConversationView(convView),
+	fCurrentIndex(0)
 {
 }
 
@@ -23,6 +25,14 @@ SendTextView::KeyDown(const char* bytes, int32 numBytes)
 {
 	int32 modifiers = Window()->CurrentMessage()->GetInt32("modifiers", 0);
 
+	if (bytes[0] == B_TAB) {
+		_AutoComplete();
+		return;
+	}
+	// Reset auto-complete state if user typed/sent something
+	fCurrentIndex = 0;
+	fCurrentWord.SetTo("");
+
 	if ((bytes[0] == B_ENTER) && (modifiers & B_COMMAND_KEY))
 		Insert("\n");
 	else if (bytes[0] == B_ENTER)
@@ -30,3 +40,42 @@ SendTextView::KeyDown(const char* bytes, int32 numBytes)
 	else
 		BTextView::KeyDown(bytes, numBytes);
 }
+
+
+void
+SendTextView::_AutoComplete()
+{
+	BStringList words;
+	BString text = Text();
+	text.Split(" ", true, words);
+	if (words.CountStrings() <= 0)
+		return;
+	BString lastWord = words.StringAt(words.CountStrings() - 1);
+
+	if (fCurrentWord.IsEmpty() == true)
+		fCurrentWord = lastWord;
+
+	// No command auto-completion (yet)
+	if (fCurrentWord.StartsWith("/") == true)
+		return;
+
+	BString user;
+	UserMap users = fConversationView->GetConversation()->Users();
+	for (int i, j = 0; i < users.CountItems(); i++)
+		if (users.KeyAt(i).StartsWith(fCurrentWord)) {
+			if (j == fCurrentIndex) {
+				user = users.KeyAt(i);
+				fCurrentIndex++;
+				break;
+			}
+			j++;
+		}
+
+	if (user.IsEmpty() == true)
+		fCurrentIndex = 0;
+	else {
+		text.ReplaceLast(lastWord.String(), user.String());
+		SetText(text.String());
+		Select(TextLength(), TextLength());
+	}
+}
diff --git a/application/views/SendTextView.h b/application/views/SendTextView.h
index 452d73e..6e12864 100644
--- a/application/views/SendTextView.h
+++ b/application/views/SendTextView.h
@@ -17,7 +17,12 @@ public:
 	void KeyDown(const char* bytes, int32 numBytes);
 
 private:
+	void _AutoComplete();
+
 	ConversationView* fConversationView;
+
+	int32 fCurrentIndex;
+	BString fCurrentWord;
 };
 
 
diff --git a/protocols/Makefile b/protocols/Makefile
index d2aee7d..1d912af 100644
--- a/protocols/Makefile
+++ b/protocols/Makefile
@@ -9,6 +9,6 @@ purple:
 xmpp:
 	$(MAKE) -f protocols/xmpp/Makefile
 
-all: irc xmpp purple
+all: xmpp purple
 
 default: all