From 9b4826f9cbfbc56d8cbf1a7c3650d0541d1130a2 Mon Sep 17 00:00:00 2001
From: Florian Stinglmayr <florian@n0la.org>
Date: Fri, 28 Jun 2019 16:25:52 +0200
Subject: [PATCH] begin framework for command handling

---
 ncdc/CMakeLists.txt      |  2 ++
 ncdc/include/ncdc/cmds.h | 19 +++++++++++++++++++
 ncdc/include/ncdc/ncdc.h |  2 ++
 ncdc/src/cmds.c          | 11 +++++++++++
 ncdc/src/mainwindow.c    | 25 +++++++++++++++++++++++++
 ncdc/src/util.c          | 14 ++++++++++++++
 6 files changed, 73 insertions(+)
 create mode 100644 ncdc/include/ncdc/cmds.h
 create mode 100644 ncdc/src/cmds.c

diff --git a/ncdc/CMakeLists.txt b/ncdc/CMakeLists.txt
index 2f7e921..f9c22b1 100644
--- a/ncdc/CMakeLists.txt
+++ b/ncdc/CMakeLists.txt
@@ -7,9 +7,11 @@ PKG_CHECK_MODULES(EDIT REQUIRED libedit)
 SET(TARGET "ncdc")
 
 SET(SOURCES
+  "include/ncdc/cmds.h"
   "include/ncdc/input.h"
   "include/ncdc/mainwindow.h"
   "include/ncdc/ncdc.h"
+  "src/cmds.c"
   "src/emacs.c"
   "src/input.c"
   "src/mainwindow.c"
diff --git a/ncdc/include/ncdc/cmds.h b/ncdc/include/ncdc/cmds.h
new file mode 100644
index 0000000..5c5f6de
--- /dev/null
+++ b/ncdc/include/ncdc/cmds.h
@@ -0,0 +1,19 @@
+#ifndef NCDC_CMDS_H
+#define NCDC_CMDS_H
+
+#include <ncdc/ncdc.h>
+#include <ncdc/mainwindow.h>
+
+typedef bool (*ncdc_command_t)(ncdc_mainwindow_t n,
+                               wchar_t const *s, size_t len);
+
+typedef struct {
+    wchar_t const *name;
+    ncdc_command_t handler;
+} ncdc_commands_t;
+
+extern ncdc_commands_t cmds[];
+
+bool ncdc_cmd_quit(ncdc_mainwindow_t n, wchar_t const *s, size_t len);
+
+#endif
diff --git a/ncdc/include/ncdc/ncdc.h b/ncdc/include/ncdc/ncdc.h
index eb656ae..f52777d 100644
--- a/ncdc/include/ncdc/ncdc.h
+++ b/ncdc/include/ncdc/ncdc.h
@@ -39,4 +39,6 @@ extern char *ncdc_private_dir;
 int strwidth(char const *string);
 char *read_char(FILE *stream);
 
+wchar_t const *w_next_word(wchar_t const *w, ssize_t len);
+
 #endif
diff --git a/ncdc/src/cmds.c b/ncdc/src/cmds.c
new file mode 100644
index 0000000..7402a58
--- /dev/null
+++ b/ncdc/src/cmds.c
@@ -0,0 +1,11 @@
+#include <ncdc/cmds.h>
+
+ncdc_commands_t cmds[] = {
+    { L"quit", ncdc_cmd_quit },
+    { NULL, NULL }
+};
+
+bool ncdc_cmd_quit(ncdc_mainwindow_t n, wchar_t const *s, size_t len)
+{
+    exit(0);
+}
diff --git a/ncdc/src/mainwindow.c b/ncdc/src/mainwindow.c
index 8a6edb3..58c302e 100644
--- a/ncdc/src/mainwindow.c
+++ b/ncdc/src/mainwindow.c
@@ -1,5 +1,6 @@
 #include <ncdc/mainwindow.h>
 #include <ncdc/input.h>
+#include <ncdc/cmds.h>
 #include <ncdc/ncdc.h>
 
 typedef enum {
@@ -41,6 +42,8 @@ struct ncdc_mainwindow_
 
 static void ncdc_mainwindow_resize(ncdc_mainwindow_t n);
 static void ncdc_mainwindow_update_focus(ncdc_mainwindow_t n);
+static bool ncdc_mainwindow_callback(ncdc_input_t i, wchar_t const *s,
+                                     size_t len, void *arg);
 
 static void ncdc_mainwindow_free(ncdc_mainwindow_t n)
 {
@@ -66,6 +69,7 @@ ncdc_mainwindow_t ncdc_mainwindow_new(void)
     ptr->ref.cleanup = (dc_cleanup_t)ncdc_mainwindow_free;
 
     ptr->in = ncdc_input_new();
+    ncdc_input_set_callback(ptr->in, ncdc_mainwindow_callback, ptr);
 
     ptr->guilds = newwin(5, 5, 1, 1);
     ptr->chat = newwin(5, 5, 4, 4);
@@ -84,6 +88,27 @@ ncdc_mainwindow_t ncdc_mainwindow_new(void)
     return ptr;
 }
 
+static bool
+ncdc_mainwindow_callback(ncdc_input_t i, wchar_t const *s,
+                         size_t len, void *arg)
+{
+    ncdc_mainwindow_t mainwin = (ncdc_mainwindow_t)arg;
+
+    if (s[0] == '/') {
+        size_t i = 0;
+        wchar_t const *n = w_next_word(s, len);
+
+        for (; cmds[i].name != NULL; i++) {
+            if (wcsncmp(s+1, cmds[i].name, (n-s-1)) == 0) {
+                cmds[i].handler(mainwin, s, len);
+                return true;
+            }
+        }
+    }
+
+    return false;
+}
+
 static void ncdc_mainwindow_resize(ncdc_mainwindow_t n)
 {
     n->guilds_h = LINES - 2;
diff --git a/ncdc/src/util.c b/ncdc/src/util.c
index 0b836b7..836cf37 100644
--- a/ncdc/src/util.c
+++ b/ncdc/src/util.c
@@ -1,5 +1,19 @@
 #include <ncdc/ncdc.h>
 
+wchar_t const *w_next_word(wchar_t const *w, ssize_t len)
+{
+    size_t i = 0;
+
+    if (len < 0) {
+        len = wcslen(w);
+    }
+
+    for (; !iswspace(w[i]) && i < len; i++)
+        ;
+
+    return w+i;
+}
+
 char *read_char(FILE *stream)
 {
     uint8_t str[7] = {0};