Add external debug file, refactoring and push rule parser

ui/debug/external.go

@@ -0,0 +1,45 @@
+// gomuks - A terminal Matrix client written in Go.
+// Copyright (C) 2018 Tulir Asokan
+//
+// 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/>.
+
+package debug
+
+import (
+	"fmt"
+	"io"
+	"os"
+)
+
+var writer io.Writer
+
+func EnableExternal() {
+	var err error
+	writer, err = os.OpenFile("/tmp/gomuks-debug.log", os.O_WRONLY|os.O_APPEND, 0644)
+	if err != nil {
+		writer = nil
+	}
+}
+
+func ExtPrintf(text string, args ...interface{}) {
+	if writer != nil {
+		fmt.Fprintf(writer, text + "\n", args...)
+	}
+}
+
+func ExtPrint(text ...interface{}) {
+	if writer != nil {
+		fmt.Fprintln(writer, text...)
+	}
+}