feat: add TUI client with FIFO communication and status display

client/makefile

@@ -1,15 +1,18 @@
 CC = gcc
 CFLAGS = -Wall -Wextra -Wpedantic -std=c11
 
-all: test_status_parse
+all: looper-client test_status_parse
+
+looper-client: src/main.c src/tui.c
+	$(CC) $(CFLAGS) -Isrc -o $@ $^ -lncurses
 
 test_status_parse: tests/test_status_parse.c
 	$(CC) $(CFLAGS) -Isrc -o test_status_parse tests/test_status_parse.c src/tui.c -lncurses
 
-test: test_status_parse
+test: looper-client test_status_parse
 	./test_status_parse
 
 .PHONY: all test clean
 
 clean:
-	rm -f test_status_parse
+	rm -f looper-client test_status_parse

client/src/main.c

@@ -0,0 +1,8 @@
+#include "tui.h"
+
+int main(void) {
+    tui_init();
+    tui_run();
+    tui_cleanup();
+    return 0;
+}

client/src/tui.c

@@ -36,6 +36,14 @@ static const char *clip_state_string(ClipState s) { (void)s; return "?"; }
 #define CELL_WIDTH 6
 #define CELL_HEIGHT 3
 
+/* status FIFO path */
+#define STATUS_FIFO "/tmp/looper_status"
+#define CMD_FIFO    "/tmp/looper_cmd"
+
+/* Per‑cell state array (indexed by row*GRID_COLS+col) */
+typedef enum { STATE_IDLE, STATE_RECORD, STATE_LOOPING, STATE_PAUSED } ChannelState;
+static ChannelState cell_state[GRID_ROWS * GRID_COLS];
+
 /* Color pairs */
 enum {
     COLOR_EMPTY=1, COLOR_RECORDING, COLOR_LOOPING, COLOR_STOPPED,
@@ -64,8 +72,6 @@ typedef struct {
 static FuzzySearch fuzzy_search = {0};
 
 /* ---------- Parse status line from engine status FIFO ---------- */
-typedef enum { STATE_IDLE, STATE_RECORD, STATE_LOOPING, STATE_PAUSED } ChannelState;
-
 bool parse_status_line(const char *line, int *ch, int *scene, ChannelState *state) {
     int sta;
     if (sscanf(line, "CH=%d SC=%d STATE=%d", ch, scene, &sta) == 3) {
@@ -85,14 +91,24 @@ bool parse_status_line(const char *line, int *ch, int *scene, ChannelState *stat
     return false;
 }
 
-/* ---------- State to color (dummy: all white) ---------- */
-static int state_to_color(ClipState s) { (void)s; return COLOR_EMPTY; }
+/* ---------- State to color (uses cell_state array) ---------- */
+static int state_to_color(ChannelState s) {
+    switch (s) {
+    case STATE_IDLE:    return COLOR_EMPTY;
+    case STATE_RECORD:  return COLOR_RECORDING;
+    case STATE_LOOPING: return COLOR_LOOPING;
+    case STATE_PAUSED:  return COLOR_STOPPED;
+    default:            return COLOR_EMPTY;
+    }
+}
 
 /* ---------- Draw cell (no AppState) ---------- */
 static void draw_cell(int grid, int row, int col, bool selected) {
     int y = row * CELL_HEIGHT + 3;
     int x = col * CELL_WIDTH + 1;
-    int color = selected ? COLOR_SELECTED : COLOR_EMPTY;
+    int idx = row * GRID_COLS + col;
+    ChannelState s = cell_state[idx];
+    int color = selected ? COLOR_SELECTED : state_to_color(s);
     attron(COLOR_PAIR(color));
     for (int dy=0; dy<CELL_HEIGHT; dy++)
         for (int dx=0; dx<CELL_WIDTH; dx++)
@@ -113,7 +129,7 @@ static void draw_grid(void) {
              selected_grid, selected_row, selected_col);
     if (show_help) {
         attron(COLOR_PAIR(COLOR_HELP));
-        mvprintw(GRID_ROWS*CELL_HEIGHT+4, 0, "Help: h/j/k/l navigate, t record, d stop, s scene, ? help, q/Esc quit");
+        mvprintw(GRID_ROWS*CELL_HEIGHT+4, 0, "Help: h/j/k/l navigate, t record, d/D stop, s/S scene, a add, A add_midi, r remove, b bind, u unbind, ? help, Esc/Q quit");
         attroff(COLOR_PAIR(COLOR_HELP));
     }
     refresh();
@@ -132,14 +148,42 @@ void tui_init(void) {
     init_pair(COLOR_SELECTED, COLOR_BLACK, COLOR_CYAN);
     init_pair(COLOR_HELP, COLOR_CYAN, COLOR_BLACK);
     for (int i=0;i<26;i++) marks[i] = -1;
+    /* initialise cell states to idle */
+    for (int i = 0; i < GRID_ROWS * GRID_COLS; i++)
+        cell_state[i] = STATE_IDLE;
 }
 
 /* ---------- TUI run ---------- */
 void tui_run(void) {
     draw_grid();
     while (1) {
-        int ch = getch();
-        switch (ch) {
+        /* read any available status lines */
+        int fd = open(STATUS_FIFO, O_RDONLY | O_NONBLOCK);
+        if (fd >= 0) {
+            char buf[256];
+            int n = read(fd, buf, sizeof(buf)-1);
+            if (n > 0) {
+                buf[n] = '\0';
+                char *line = buf;
+                while (*line) {
+                    char *nl = strchr(line, '\n');
+                    if (nl) *nl = '\0';
+                    int ch, sc;
+                    ChannelState st;
+                    if (parse_status_line(line, &ch, &sc, &st)) {
+                        if (ch >= 0 && ch < GRID_ROWS * GRID_COLS)
+                            cell_state[ch] = st;
+                    }
+                    if (nl) {
+                        *nl = '\n';
+                        line = nl + 1;
+                    } else break;
+                }
+            }
+            close(fd);
+        }
+        int chc = getch();
+        switch (chc) {
         case 'h': case KEY_LEFT:   selected_col = (selected_col-1+GRID_COLS)%GRID_COLS; break;
         case 'j': case KEY_DOWN:   selected_row = (selected_row+1)%GRID_ROWS; break;
         case 'k': case KEY_UP:     selected_row = (selected_row-1+GRID_ROWS)%GRID_ROWS; break;
@@ -150,13 +194,33 @@ void tui_run(void) {
             send_command(cmd);
             break;
         }
-        case 's': {
+        case 's':
             send_command("scene_next\n");
             break;
-        }
-        case 'd': case 'S':
+        case 'S':
+            send_command("scene_prev\n");
+            break;
+        case 'd': case 'D':
             send_command("stop\n");
             break;
+        case 'a':
+            send_command("add\n");
+            break;
+        case 'A':
+            send_command("add_midi\n");
+            break;
+        case 'r':
+            send_command("remove\n");
+            break;
+        case 'b': {
+            char cmd[16];
+            snprintf(cmd, sizeof(cmd), "bind %d\n", selected_col);
+            send_command(cmd);
+            break;
+        }
+        case 'u':
+            send_command("unbind\n");
+            break;
         case '?': show_help = !show_help; break;
         case 27: case 'Q': return;
         default: break;
@@ -167,5 +231,8 @@ void tui_run(void) {
 
 void tui_cleanup(void) {
     if (yank_buffer.clip_indices) free(yank_buffer.clip_indices);
+    /* delete FIFOs */
+    unlink(STATUS_FIFO);
+    unlink(CMD_FIFO);
     curs_set(1); endwin();
 }