Add an example exec bot that handles basic commands

hooks/echobot.sh

@@ -5,7 +5,7 @@
 # Setup:
 #
 # $ salty-chat -i ~/.config/salty/echobot.key -u echo@yourdomain.tld make-user
-# $ salty-chat -i ~/.config/salty/echobot.key -u echo@mills.io read --post-hook ./echobot.sh
+# $ salty-chat -i ~/.config/salty/echobot.key -u echo@yourdomain.tld read --post-hook ./echobot.sh
 
 set -e
 

hooks/execbot.sh

@@ -0,0 +1,47 @@
+#!/bin/sh
+# A Salty IM Command Execution Bot written as a POSIX Shell script
+# using salty-chat read' --post-hook mechanism.
+#
+# Supported commands: date time uptime whoami
+#
+# Setup:
+#
+# $ salty-chat -i ~/.config/salty/execbot.key -u exec@yourdomain.tld make-user
+# $ salty-chat -i ~/.config/salty/execbot.key -u exec@yourdomain.tld read --post-hook ./execbot.sh
+
+set -e
+
+# XXX: Set this to the execbot's key
+identity=
+
+# XXX: Set this to the execbot's addr
+user=
+
+tmpfile="$(mktemp -t "echobot-XXXXXX")"
+trap 'rm $tmpfile' EXIT
+
+cat > "$tmpfile"
+
+sender="$(head -n 1 < "$tmpfile" | awk '{ print $2 }')"
+sender="$(echo "$sender" | sed 's/[)(]//g')"
+message="$(head -n 1 < "$tmpfile" | awk '{ $1 = ""; $2 = ""; print $0; }')"
+
+cmd="$(echo "$message" | awk '{$1=$1};1')"
+
+cmds="time date uptime whoami"
+case $cmd in
+  "time" | "date")
+    result="$(date)"
+    ;;
+  "uptime")
+    result="$(uptime)"
+    ;;
+  "whoami")
+    result="$(whoami)"
+    ;;
+  *)
+    result="$(printf "Invalid command '%s' Available commands are: $cmds" "$cmd")"
+    ;;
+esac
+
+echo "$result" | salty-chat -d -i "$identity" -u "$user" send "$sender"