From 439a0b0bb2c20f70fb407382ccff4b2355235990 Mon Sep 17 00:00:00 2001
From: Adrien Bourmault <neox@os-k.eu>
Date: Thu, 8 Jul 2021 20:30:09 +0200
Subject: [PATCH] WIP: [BUGGY] cli history

---
 src/cli.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 47 insertions(+), 9 deletions(-)

diff --git a/src/cli.c b/src/cli.c
index f489a5b..957ff51 100644
--- a/src/cli.c
+++ b/src/cli.c
@@ -30,6 +30,7 @@
 
 #define SEND_BUFFER_SIZE 80
 #define RECEIVE_BUFFER_SIZE 80 * 24
+#define NHISTORY 25
 
 #define SERVER_IP_ADDR "127.0.0.1"
 #define SERVER_PORT 9000
@@ -73,24 +74,56 @@ static char getch(void)
     return buf;
  }
 
+
+char sendBuff[SEND_BUFFER_SIZE] = {0};
+char receiveBuff[RECEIVE_BUFFER_SIZE] = {0};
+char historyBuff[SEND_BUFFER_SIZE * NHISTORY] = {0};
+char curChar;
+char *exitCommand = "exit";
+volatile int curLineLength, readLine, historyIndex, historyModifier = 0;
 void connectedCommunication(int sockfd)
 {
-    char sendBuff[SEND_BUFFER_SIZE], receiveBuff[RECEIVE_BUFFER_SIZE], curChar;
-    char *exitCommand = "exit";
-    int i;
 
     for (;;) {
         // Zeroing buffer
         bzero(sendBuff, sizeof(sendBuff));
         printf("gem-graph console> ");
 
-        i = 0;
-
         // Read command from terminal
-        while (( curChar= getch()) != '\n') {
-            // XXX ARROWS
-            sendBuff[i++] = curChar;
-            printf("%c", curChar);
+        curLineLength = 0;
+        readLine = 1;
+        historyModifier = 1;
+        while (readLine && (curChar = getch())) {
+
+            switch (curChar) {
+            case '\n':
+                printf("%c", curChar);
+                readLine = 0;
+                break;
+            case 27:
+                if (getch() == 91)
+                    if (getch() == 65) {
+                        historyModifier--;
+
+                        printf("%s", &historyBuff[
+                               (historyIndex - historyModifier - 1)
+                               * SEND_BUFFER_SIZE
+                               ]);
+
+                        memcpy(sendBuff, &historyBuff[
+                               (historyIndex - historyModifier - 1)
+                               * SEND_BUFFER_SIZE
+                               ], SEND_BUFFER_SIZE);
+
+                        curLineLength = curLineLength + strlen(sendBuff);
+                    }
+
+                break;
+            default:
+                sendBuff[curLineLength++] = curChar;
+                printf("%c", curChar);
+                break;
+            }
             fflush(stdout);
         }
 
@@ -98,6 +131,11 @@ void connectedCommunication(int sockfd)
         if (sendBuff[0] == 0)
             continue;
 
+        // Update history
+        memcpy(&historyBuff[historyIndex * SEND_BUFFER_SIZE], sendBuff,
+               SEND_BUFFER_SIZE);
+        historyIndex = (historyIndex + 1) % NHISTORY;
+
         // Quit if asked
         if (strcmp(exitCommand, sendBuff) == 0) {
             return;