mirror of
https://github.com/42wim/matterbridge.git
synced 2024-11-24 11:42:03 -08:00
404 lines
8.4 KiB
Go
404 lines
8.4 KiB
Go
package logr
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
"reflect"
|
|
"strconv"
|
|
"time"
|
|
)
|
|
|
|
var (
|
|
Comma = []byte{','}
|
|
Equals = []byte{'='}
|
|
Space = []byte{' '}
|
|
Newline = []byte{'\n'}
|
|
Quote = []byte{'"'}
|
|
Colon = []byte{':'}
|
|
)
|
|
|
|
// LogCloner is implemented by `Any` types that require a clone to be provided
|
|
// to the logger because the original may mutate.
|
|
type LogCloner interface {
|
|
LogClone() interface{}
|
|
}
|
|
|
|
// LogWriter is implemented by `Any` types that provide custom formatting for
|
|
// log output. A string representation of the type should be written directly to
|
|
// the `io.Writer`.
|
|
type LogWriter interface {
|
|
LogWrite(w io.Writer) error
|
|
}
|
|
|
|
type FieldType uint8
|
|
|
|
const (
|
|
UnknownType FieldType = iota
|
|
StringType
|
|
StringerType
|
|
StructType
|
|
ErrorType
|
|
BoolType
|
|
TimestampMillisType
|
|
TimeType
|
|
DurationType
|
|
Int64Type
|
|
Int32Type
|
|
IntType
|
|
Uint64Type
|
|
Uint32Type
|
|
UintType
|
|
Float64Type
|
|
Float32Type
|
|
BinaryType
|
|
ArrayType
|
|
MapType
|
|
)
|
|
|
|
type Field struct {
|
|
Key string
|
|
Type FieldType
|
|
Integer int64
|
|
Float float64
|
|
String string
|
|
Interface interface{}
|
|
}
|
|
|
|
func quoteString(w io.Writer, s string, shouldQuote func(s string) bool) error {
|
|
b := shouldQuote(s)
|
|
if b {
|
|
if _, err := w.Write(Quote); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
if _, err := w.Write([]byte(s)); err != nil {
|
|
return err
|
|
}
|
|
|
|
if b {
|
|
if _, err := w.Write(Quote); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// ValueString converts a known type to a string using default formatting.
|
|
// This is called lazily by a formatter.
|
|
// Formatters can provide custom formatting or types passed via `Any` can implement
|
|
// the `LogString` interface to generate output for logging.
|
|
// If the optional shouldQuote callback is provided, then it will be called for any
|
|
// string output that could potentially need to be quoted.
|
|
func (f Field) ValueString(w io.Writer, shouldQuote func(s string) bool) error {
|
|
if shouldQuote == nil {
|
|
shouldQuote = func(s string) bool { return false }
|
|
}
|
|
var err error
|
|
switch f.Type {
|
|
case StringType:
|
|
err = quoteString(w, f.String, shouldQuote)
|
|
|
|
case StringerType:
|
|
s, ok := f.Interface.(fmt.Stringer)
|
|
if ok {
|
|
err = quoteString(w, s.String(), shouldQuote)
|
|
} else if f.Interface == nil {
|
|
err = quoteString(w, "", shouldQuote)
|
|
} else {
|
|
err = fmt.Errorf("invalid fmt.Stringer for key %s", f.Key)
|
|
}
|
|
|
|
case StructType:
|
|
s, ok := f.Interface.(LogWriter)
|
|
if ok {
|
|
err = s.LogWrite(w)
|
|
break
|
|
}
|
|
// structs that do not implement LogWriter fall back to reflection via Printf.
|
|
// TODO: create custom reflection-based encoder.
|
|
_, err = fmt.Fprintf(w, "%v", f.Interface)
|
|
|
|
case ErrorType:
|
|
// TODO: create custom error encoder.
|
|
err = quoteString(w, fmt.Sprintf("%v", f.Interface), shouldQuote)
|
|
|
|
case BoolType:
|
|
var b bool
|
|
if f.Integer != 0 {
|
|
b = true
|
|
}
|
|
_, err = io.WriteString(w, strconv.FormatBool(b))
|
|
|
|
case TimestampMillisType:
|
|
ts := time.Unix(f.Integer/1000, (f.Integer%1000)*int64(time.Millisecond))
|
|
err = quoteString(w, ts.UTC().Format(TimestampMillisFormat), shouldQuote)
|
|
|
|
case TimeType:
|
|
t, ok := f.Interface.(time.Time)
|
|
if !ok {
|
|
err = errors.New("invalid time")
|
|
break
|
|
}
|
|
err = quoteString(w, t.Format(DefTimestampFormat), shouldQuote)
|
|
|
|
case DurationType:
|
|
_, err = fmt.Fprintf(w, "%s", time.Duration(f.Integer))
|
|
|
|
case Int64Type, Int32Type, IntType:
|
|
_, err = io.WriteString(w, strconv.FormatInt(f.Integer, 10))
|
|
|
|
case Uint64Type, Uint32Type, UintType:
|
|
_, err = io.WriteString(w, strconv.FormatUint(uint64(f.Integer), 10))
|
|
|
|
case Float64Type, Float32Type:
|
|
size := 64
|
|
if f.Type == Float32Type {
|
|
size = 32
|
|
}
|
|
err = quoteString(w, strconv.FormatFloat(f.Float, 'f', -1, size), shouldQuote)
|
|
|
|
case BinaryType:
|
|
b, ok := f.Interface.([]byte)
|
|
if ok {
|
|
_, err = fmt.Fprintf(w, "[%X]", b)
|
|
break
|
|
}
|
|
_, err = fmt.Fprintf(w, "[%v]", f.Interface)
|
|
|
|
case ArrayType:
|
|
a := reflect.ValueOf(f.Interface)
|
|
arr:
|
|
for i := 0; i < a.Len(); i++ {
|
|
item := a.Index(i)
|
|
switch v := item.Interface().(type) {
|
|
case LogWriter:
|
|
if err = v.LogWrite(w); err != nil {
|
|
break arr
|
|
}
|
|
case fmt.Stringer:
|
|
if err = quoteString(w, v.String(), shouldQuote); err != nil {
|
|
break arr
|
|
}
|
|
default:
|
|
s := fmt.Sprintf("%v", v)
|
|
if err = quoteString(w, s, shouldQuote); err != nil {
|
|
break arr
|
|
}
|
|
}
|
|
if _, err = w.Write(Comma); err != nil {
|
|
break arr
|
|
}
|
|
}
|
|
|
|
case MapType:
|
|
a := reflect.ValueOf(f.Interface)
|
|
iter := a.MapRange()
|
|
it:
|
|
for iter.Next() {
|
|
if _, err = io.WriteString(w, iter.Key().String()); err != nil {
|
|
break it
|
|
}
|
|
if _, err = w.Write(Equals); err != nil {
|
|
break it
|
|
}
|
|
val := iter.Value().Interface()
|
|
switch v := val.(type) {
|
|
case LogWriter:
|
|
if err = v.LogWrite(w); err != nil {
|
|
break it
|
|
}
|
|
case fmt.Stringer:
|
|
if err = quoteString(w, v.String(), shouldQuote); err != nil {
|
|
break it
|
|
}
|
|
default:
|
|
s := fmt.Sprintf("%v", v)
|
|
if err = quoteString(w, s, shouldQuote); err != nil {
|
|
break it
|
|
}
|
|
}
|
|
if _, err = w.Write(Comma); err != nil {
|
|
break it
|
|
}
|
|
}
|
|
|
|
case UnknownType:
|
|
_, err = fmt.Fprintf(w, "%v", f.Interface)
|
|
|
|
default:
|
|
err = fmt.Errorf("invalid type %d", f.Type)
|
|
}
|
|
return err
|
|
}
|
|
|
|
func nilField(key string) Field {
|
|
return String(key, "")
|
|
}
|
|
|
|
func fieldForAny(key string, val interface{}) Field {
|
|
switch v := val.(type) {
|
|
case LogCloner:
|
|
if v == nil {
|
|
return nilField(key)
|
|
}
|
|
c := v.LogClone()
|
|
return Field{Key: key, Type: StructType, Interface: c}
|
|
case *LogCloner:
|
|
if v == nil {
|
|
return nilField(key)
|
|
}
|
|
c := (*v).LogClone()
|
|
return Field{Key: key, Type: StructType, Interface: c}
|
|
case LogWriter:
|
|
if v == nil {
|
|
return nilField(key)
|
|
}
|
|
return Field{Key: key, Type: StructType, Interface: v}
|
|
case *LogWriter:
|
|
if v == nil {
|
|
return nilField(key)
|
|
}
|
|
return Field{Key: key, Type: StructType, Interface: *v}
|
|
case bool:
|
|
return Bool(key, v)
|
|
case *bool:
|
|
if v == nil {
|
|
return nilField(key)
|
|
}
|
|
return Bool(key, *v)
|
|
case float64:
|
|
return Float64(key, v)
|
|
case *float64:
|
|
if v == nil {
|
|
return nilField(key)
|
|
}
|
|
return Float64(key, *v)
|
|
case float32:
|
|
return Float32(key, v)
|
|
case *float32:
|
|
if v == nil {
|
|
return nilField(key)
|
|
}
|
|
return Float32(key, *v)
|
|
case int:
|
|
return Int(key, v)
|
|
case *int:
|
|
if v == nil {
|
|
return nilField(key)
|
|
}
|
|
return Int(key, *v)
|
|
case int64:
|
|
return Int64(key, v)
|
|
case *int64:
|
|
if v == nil {
|
|
return nilField(key)
|
|
}
|
|
return Int64(key, *v)
|
|
case int32:
|
|
return Int32(key, v)
|
|
case *int32:
|
|
if v == nil {
|
|
return nilField(key)
|
|
}
|
|
return Int32(key, *v)
|
|
case int16:
|
|
return Int32(key, int32(v))
|
|
case *int16:
|
|
if v == nil {
|
|
return nilField(key)
|
|
}
|
|
return Int32(key, int32(*v))
|
|
case int8:
|
|
return Int32(key, int32(v))
|
|
case *int8:
|
|
if v == nil {
|
|
return nilField(key)
|
|
}
|
|
return Int32(key, int32(*v))
|
|
case string:
|
|
return String(key, v)
|
|
case *string:
|
|
if v == nil {
|
|
return nilField(key)
|
|
}
|
|
return String(key, *v)
|
|
case uint:
|
|
return Uint(key, v)
|
|
case *uint:
|
|
if v == nil {
|
|
return nilField(key)
|
|
}
|
|
return Uint(key, *v)
|
|
case uint64:
|
|
return Uint64(key, v)
|
|
case *uint64:
|
|
if v == nil {
|
|
return nilField(key)
|
|
}
|
|
return Uint64(key, *v)
|
|
case uint32:
|
|
return Uint32(key, v)
|
|
case *uint32:
|
|
if v == nil {
|
|
return nilField(key)
|
|
}
|
|
return Uint32(key, *v)
|
|
case uint16:
|
|
return Uint32(key, uint32(v))
|
|
case *uint16:
|
|
if v == nil {
|
|
return nilField(key)
|
|
}
|
|
return Uint32(key, uint32(*v))
|
|
case uint8:
|
|
return Uint32(key, uint32(v))
|
|
case *uint8:
|
|
if v == nil {
|
|
return nilField(key)
|
|
}
|
|
return Uint32(key, uint32(*v))
|
|
case []byte:
|
|
if v == nil {
|
|
return nilField(key)
|
|
}
|
|
return Field{Key: key, Type: BinaryType, Interface: v}
|
|
case time.Time:
|
|
return Time(key, v)
|
|
case *time.Time:
|
|
if v == nil {
|
|
return nilField(key)
|
|
}
|
|
return Time(key, *v)
|
|
case time.Duration:
|
|
return Duration(key, v)
|
|
case *time.Duration:
|
|
if v == nil {
|
|
return nilField(key)
|
|
}
|
|
return Duration(key, *v)
|
|
case error:
|
|
return NamedErr(key, v)
|
|
case fmt.Stringer:
|
|
if v == nil {
|
|
return nilField(key)
|
|
}
|
|
return Field{Key: key, Type: StringerType, Interface: v}
|
|
case *fmt.Stringer:
|
|
if v == nil {
|
|
return nilField(key)
|
|
}
|
|
return Field{Key: key, Type: StringerType, Interface: *v}
|
|
default:
|
|
return Field{Key: key, Type: UnknownType, Interface: val}
|
|
}
|
|
}
|
|
|
|
// FieldSorter provides sorting of an array of fields by key.
|
|
type FieldSorter []Field
|
|
|
|
func (fs FieldSorter) Len() int { return len(fs) }
|
|
func (fs FieldSorter) Less(i, j int) bool { return fs[i].Key < fs[j].Key }
|
|
func (fs FieldSorter) Swap(i, j int) { fs[i], fs[j] = fs[j], fs[i] }
|