From 53fedffe871fb97a555c350241a533bffc4c296f Mon Sep 17 00:00:00 2001
From: Lisa Milne <lisamilne618@gmail.com>
Date: Wed, 8 Nov 2023 17:21:02 +1000
Subject: [PATCH] fix shell prompt bug, add file type detector, start to work
 on more commands

---
 clite/commands.js |  8 ++++++++
 clite/core.js     | 50 ++++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 57 insertions(+), 1 deletion(-)

diff --git a/clite/commands.js b/clite/commands.js
index 56c5afa..1c74318 100644
--- a/clite/commands.js
+++ b/clite/commands.js
@@ -237,5 +237,13 @@ clite.commands.load('less',function(args,env,io) {
 	return 0;
 });
 
+clite.commands.load('view',function(args,env,io) {
+	return 0;
+});
+
+clite.commands.load('edit',function(args,env,io) {
+	return 0;
+});
+
 // insert commands above this line
 }
diff --git a/clite/core.js b/clite/core.js
index 1bbcbfd..38eb0a2 100644
--- a/clite/core.js
+++ b/clite/core.js
@@ -912,7 +912,8 @@ clite.shell = {
 			clite.shell.prompt.data = txt;
 		},
 		pop:function() {
-			clite.shell.prompt.data = clite.shell.prompt.list.pop();
+			if (clite.shell.prompt.list.length > 0)
+				clite.shell.prompt.data = clite.shell.prompt.list.pop();
 		},
 		generate:function() {
 			var p = clite.shell.env.USER+':'+clite.shell.env.PWD;
@@ -1045,5 +1046,52 @@ clite.lib = {
 		if (s.length > 0)
 			parts.push(s);
 		return parts;//txt.split(' ');
+	},
+	getFileType:function(fd) {
+	// returns an int identifier for the file type:
+	// 0: unknown
+	// 1: text file
+	// 2: executable/binary (function)
+	// 3: directory
+	// 4: link
+	// 5: device
+	// 6: unloaded remote file
+	// 7: shell script
+	// 8: image
+		if (fd.node.data.content == null) {
+			if (fd.node.data.remote != null)
+				return 6;
+			return 0;
+		}
+		if (fd.node.data.islink)
+			return 4;
+		if (fd.node.data.isdir)
+			return 3;
+		if (fd.node.data.isdev)
+			return 5;
+		const type = typeof fd.node.data.content;
+		switch (type) {
+		case 'string': // text file
+			if (fd.node.data.content.substring(0,2) == '#!')
+				return 7;
+			return 1;
+			break;
+		case 'function': // executable
+			return 2;
+			break;
+		case 'object':
+			if (Array.isArray(fd.node.data.content)) // directory
+				return 3;
+			if (fd.node.data.content instanceof HTMLImageElement)
+				return 8;
+		case 'symbol':
+		case 'boolean':
+		case 'number':
+		case 'bigint':
+		case 'undefined':
+		default:
+			return 0;
+		}
+		return 0;
 	}
 }