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|
package saggytrousers
import (
"fmt"
"os"
"time"
)
type LogInfo struct {
Fp *os.File
Prog string
Valid bool /* Did the log file open successfully. If not, simply don't log */
}
var logInfo LogInfo
func LogFree() {
err := logInfo.Fp.Close()
if err != nil {
fmt.Printf("That's not great. We can't close the log file!\n")
}
}
func LogInit(file, prog string) {
logging := true /* are we logging? Set to false on error. */
fp, err := os.OpenFile(file, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0755)
if err != nil {
fmt.Printf("The log file at [%v] cannot be opened.\n", file)
choices := make([]string, 3)
choices[0] = "Exit Application"
choices[1] = "Continue without Logging"
choices[2] = "View error message"
for true {
v := SelectIndexFromArray(choices, "What would you like to do? ", /* each on new line: */ true)
switch v {
case 0: /* Exit Application */
os.Exit(-1)
case 1: /* Continue without Logging */
logging = false /* execution just continues from here */
break
case 2: /* View error message */
fmt.Printf("The error message is:\n%v\n", err)
}
}
}
logInfo = LogInfo {
fp,
prog,
logging,
}
}
func WriteLogFile(s string) {
/* TODO: implement. This should just write to the log file in logInfo.Fp */
_, err := logInfo.Fp.WriteString(fmt.Sprintf("[%v] %v -- %v",
time.Now().Format("2006-01-02 15:04:05"),
logInfo.Prog,
s))
if err != nil {
fmt.Printf("WriteLogFile log failed with %v\n", err)
}
}
func Log(stdout bool, format string, a ...any) {
s := fmt.Sprintf(format, a...)
if stdout {
fmt.Printf(s)
}
// Regardless, we write to the log file.
WriteLogFile(s)
}
func ErrLog(stderr bool, format string, a ...any) {
s := fmt.Sprintf(format, a...)
if stderr {
fmt.Printf("[ERROR] %v", s)
}
WriteLogFile(s)
}
|
