omissis/goarkitect

package log

import (
    "errors"
    "fmt"
    "log"
    "time"

    jsonx "github.com/omissis/goarkitect/internal/x/json"
)

var (
    //nolint:gochecknoglobals // it's global to keep logx simple and close to stdlib's
    format = "text"

    ErrUnknownOutputFormat = errors.New("unknown output format, supported ones are: json, text")
)

func SetFormat(f string) {
    if f != "text" && f != "json" {
        log.Fatal(
            fmt.Errorf("'%s' :%w", f, ErrUnknownOutputFormat),
        )
    }

    format = f
}

func Fatal(v error) {
    switch format {
    case "text":
        log.Fatal(v)

    case "json":
        jv, jerr := jsonx.Marshal(
            map[string]any{
                "time":  time.Now().Format(time.RFC3339),
                "level": "ERROR",
                "msg":   v.Error(),
            },
        )
        if jerr != nil {
            log.Fatal(jerr)
        }

        log.Fatal(jv)

    default:
        log.Fatalf("invalid format value: '%s'", format)
    }
}