From 5331b639b98e57771c3c303493c232376eb9999f Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pj@pehjota.net>
Date: Tue, 27 Oct 2015 12:30:34 -0400
Subject: Add UI support

Also remove src/foo.sh.
---
diff --git a/src/foo.sh b/src/foo.sh
deleted file mode 100644
index 39ec45d..0000000
--- a/src/foo.sh
+++ /dev/null
@@ -1,4 +0,0 @@
-hello()
-{
-	echo hello world
-}
diff --git a/src/local.mk b/src/local.mk
index 3f18420..4d0e58d 100644
--- a/src/local.mk
+++ b/src/local.mk
@@ -1,3 +1,5 @@
 firman_SOURCES += \
 	src/main.sh \
-	src/foo.sh
+	src/ui.sh
+
+include $(top_srcdir)/src/ui/local.mk
diff --git a/src/main.sh b/src/main.sh
index 62878e3..35156b3 100644
--- a/src/main.sh
+++ b/src/main.sh
@@ -1,4 +1,22 @@
+# Program entry point
+#
+# Copyright (C) 2015  Patrick "P. J." McDermott
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
 main()
 {
-	hello
+	init_ui 'cli'
+	info 'Hello, world!'
 }
diff --git a/src/ui.sh b/src/ui.sh
new file mode 100644
index 0000000..f6e225c
--- /dev/null
+++ b/src/ui.sh
@@ -0,0 +1,28 @@
+# User interface bindings
+#
+# Copyright (C) 2015  Patrick "P. J." McDermott
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+ui_functions='info warn err dbg show_menu'
+
+init_ui()
+{
+	local ui="${1}"
+	local fn=
+
+	for fn in ${ui_functions}; do
+		eval "${fn}() { ${ui}_${fn} \"\${@}\"; }"
+	done
+}
diff --git a/src/ui/cli.sh b/src/ui/cli.sh
new file mode 100644
index 0000000..16321b8
--- /dev/null
+++ b/src/ui/cli.sh
@@ -0,0 +1,48 @@
+# CLI user interface
+#
+# Copyright (C) 2015  Patrick "P. J." McDermott
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+cli_info()
+{
+	local fmt="${1}"
+	shift 1
+
+	printf "${fmt}\n" "${@}"
+}
+
+cli_warn()
+{
+	local fmt="${1}"
+	shift 1
+
+	printf "Warning: ${fmt}\n" "${@}"
+}
+
+cli_err()
+{
+	local fmt="${1}"
+	shift 1
+
+	printf "Error: ${fmt}\n" "${@}"
+}
+
+cli_dbg()
+{
+	local fmt="${1}"
+	shift 1
+
+	printf "Debug: ${fmt}\n" "${@}"
+}
diff --git a/src/ui/local.mk b/src/ui/local.mk
new file mode 100644
index 0000000..636d0a5
--- /dev/null
+++ b/src/ui/local.mk
@@ -0,0 +1,2 @@
+firman_SOURCES += \
+	src/ui/cli.sh
--
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