Initial commit

internal/moon/chatlog.go

@@ -0,0 +1,56 @@
+package moon
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"path/filepath"
+	"strconv"
+)
+
+// ChatLog logs message to separate file, placed in basedir(Cfg.LogFile).
+func ChatLog(chatid int64, text string) {
+	file := os.DevNull
+
+	if Cfg.LogFile != "" {
+		file = fmt.Sprintf("%s/%s", filepath.Dir(Cfg.LogFile), strconv.FormatInt(chatid, 10))
+	}
+
+	var (
+		isOpened = false
+	)
+
+	for _, l := range chatlogs {
+		if l.LogFilePath == file {
+			isOpened = true
+
+			break
+		}
+	}
+
+	if !isOpened {
+		// open log file
+		logFile, err := os.OpenFile(file, os.O_APPEND|os.O_RDWR|os.O_CREATE, 0644)
+
+		if err != nil {
+			fmt.Printf("Unable to open log file %s: %s", file, err)
+		}
+
+		l := Chatlog{LogFilePath: file, File: logFile}
+
+		chatlogs = append(chatlogs, l)
+	}
+
+	for _, l := range chatlogs {
+		if l.LogFilePath == file {
+			log.SetOutput(l.File)
+			// optional: log date-time, filename, and line number
+			log.SetFlags(log.Lshortfile | log.LstdFlags)
+			log.Println(text)
+
+			break
+		}
+	}
+}
+
+/* vim: set ft=go noet ai ts=4 sw=4 sts=4: */