gotosocial/vendor/github.com/uptrace/bun/schema/append_value.go
2021-10-24 13:14:37 +02:00

283 lines
7 KiB
Go

package schema
import (
"database/sql/driver"
"fmt"
"net"
"reflect"
"strconv"
"strings"
"sync"
"time"
"github.com/uptrace/bun/dialect"
"github.com/uptrace/bun/dialect/sqltype"
"github.com/uptrace/bun/extra/bunjson"
"github.com/uptrace/bun/internal"
"github.com/vmihailenco/msgpack/v5"
)
type (
AppenderFunc func(fmter Formatter, b []byte, v reflect.Value) []byte
CustomAppender func(typ reflect.Type) AppenderFunc
)
var appenders = []AppenderFunc{
reflect.Bool: AppendBoolValue,
reflect.Int: AppendIntValue,
reflect.Int8: AppendIntValue,
reflect.Int16: AppendIntValue,
reflect.Int32: AppendIntValue,
reflect.Int64: AppendIntValue,
reflect.Uint: AppendUintValue,
reflect.Uint8: AppendUintValue,
reflect.Uint16: AppendUintValue,
reflect.Uint32: appendUint32Value,
reflect.Uint64: appendUint64Value,
reflect.Uintptr: nil,
reflect.Float32: AppendFloat32Value,
reflect.Float64: AppendFloat64Value,
reflect.Complex64: nil,
reflect.Complex128: nil,
reflect.Array: AppendJSONValue,
reflect.Chan: nil,
reflect.Func: nil,
reflect.Interface: nil,
reflect.Map: AppendJSONValue,
reflect.Ptr: nil,
reflect.Slice: AppendJSONValue,
reflect.String: AppendStringValue,
reflect.Struct: AppendJSONValue,
reflect.UnsafePointer: nil,
}
var appenderMap sync.Map
func FieldAppender(dialect Dialect, field *Field) AppenderFunc {
if field.Tag.HasOption("msgpack") {
return appendMsgpack
}
switch strings.ToUpper(field.UserSQLType) {
case sqltype.JSON, sqltype.JSONB:
return AppendJSONValue
}
return Appender(dialect, field.StructField.Type)
}
func Appender(dialect Dialect, typ reflect.Type) AppenderFunc {
if v, ok := appenderMap.Load(typ); ok {
return v.(AppenderFunc)
}
fn := appender(dialect, typ)
if v, ok := appenderMap.LoadOrStore(typ, fn); ok {
return v.(AppenderFunc)
}
return fn
}
func appender(dialect Dialect, typ reflect.Type) AppenderFunc {
switch typ {
case bytesType:
return appendBytesValue
case timeType:
return appendTimeValue
case ipType:
return appendIPValue
case ipNetType:
return appendIPNetValue
case jsonRawMessageType:
return appendJSONRawMessageValue
}
if typ.Implements(queryAppenderType) {
return appendQueryAppenderValue
}
if typ.Implements(driverValuerType) {
return appendDriverValue
}
kind := typ.Kind()
if kind != reflect.Ptr {
ptr := reflect.PtrTo(typ)
if ptr.Implements(queryAppenderType) {
return addrAppender(appendQueryAppenderValue)
}
if ptr.Implements(driverValuerType) {
return addrAppender(appendDriverValue)
}
}
switch kind {
case reflect.Interface:
return ifaceAppenderFunc
case reflect.Ptr:
if fn := Appender(dialect, typ.Elem()); fn != nil {
return PtrAppender(fn)
}
case reflect.Slice:
if typ.Elem().Kind() == reflect.Uint8 {
return appendBytesValue
}
case reflect.Array:
if typ.Elem().Kind() == reflect.Uint8 {
return appendArrayBytesValue
}
}
return appenders[typ.Kind()]
}
func ifaceAppenderFunc(fmter Formatter, b []byte, v reflect.Value) []byte {
if v.IsNil() {
return dialect.AppendNull(b)
}
elem := v.Elem()
appender := Appender(fmter.Dialect(), elem.Type())
return appender(fmter, b, elem)
}
func PtrAppender(fn AppenderFunc) AppenderFunc {
return func(fmter Formatter, b []byte, v reflect.Value) []byte {
if v.IsNil() {
return dialect.AppendNull(b)
}
return fn(fmter, b, v.Elem())
}
}
func AppendBoolValue(fmter Formatter, b []byte, v reflect.Value) []byte {
return dialect.AppendBool(b, v.Bool())
}
func AppendIntValue(fmter Formatter, b []byte, v reflect.Value) []byte {
return strconv.AppendInt(b, v.Int(), 10)
}
func AppendUintValue(fmter Formatter, b []byte, v reflect.Value) []byte {
return strconv.AppendUint(b, v.Uint(), 10)
}
func appendUint32Value(fmter Formatter, b []byte, v reflect.Value) []byte {
return fmter.Dialect().AppendUint32(b, uint32(v.Uint()))
}
func appendUint64Value(fmter Formatter, b []byte, v reflect.Value) []byte {
return fmter.Dialect().AppendUint64(b, v.Uint())
}
func AppendFloat32Value(fmter Formatter, b []byte, v reflect.Value) []byte {
return dialect.AppendFloat32(b, float32(v.Float()))
}
func AppendFloat64Value(fmter Formatter, b []byte, v reflect.Value) []byte {
return dialect.AppendFloat64(b, float64(v.Float()))
}
func appendBytesValue(fmter Formatter, b []byte, v reflect.Value) []byte {
return fmter.Dialect().AppendBytes(b, v.Bytes())
}
func appendArrayBytesValue(fmter Formatter, b []byte, v reflect.Value) []byte {
if v.CanAddr() {
return fmter.Dialect().AppendBytes(b, v.Slice(0, v.Len()).Bytes())
}
tmp := make([]byte, v.Len())
reflect.Copy(reflect.ValueOf(tmp), v)
b = fmter.Dialect().AppendBytes(b, tmp)
return b
}
func AppendStringValue(fmter Formatter, b []byte, v reflect.Value) []byte {
return dialect.AppendString(b, v.String())
}
func AppendJSONValue(fmter Formatter, b []byte, v reflect.Value) []byte {
bb, err := bunjson.Marshal(v.Interface())
if err != nil {
return dialect.AppendError(b, err)
}
if len(bb) > 0 && bb[len(bb)-1] == '\n' {
bb = bb[:len(bb)-1]
}
return fmter.Dialect().AppendJSON(b, bb)
}
func appendTimeValue(fmter Formatter, b []byte, v reflect.Value) []byte {
tm := v.Interface().(time.Time)
return fmter.Dialect().AppendTime(b, tm)
}
func appendIPValue(fmter Formatter, b []byte, v reflect.Value) []byte {
ip := v.Interface().(net.IP)
return dialect.AppendString(b, ip.String())
}
func appendIPNetValue(fmter Formatter, b []byte, v reflect.Value) []byte {
ipnet := v.Interface().(net.IPNet)
return dialect.AppendString(b, ipnet.String())
}
func appendJSONRawMessageValue(fmter Formatter, b []byte, v reflect.Value) []byte {
bytes := v.Bytes()
if bytes == nil {
return dialect.AppendNull(b)
}
return dialect.AppendString(b, internal.String(bytes))
}
func appendQueryAppenderValue(fmter Formatter, b []byte, v reflect.Value) []byte {
return AppendQueryAppender(fmter, b, v.Interface().(QueryAppender))
}
func appendDriverValue(fmter Formatter, b []byte, v reflect.Value) []byte {
value, err := v.Interface().(driver.Valuer).Value()
if err != nil {
return dialect.AppendError(b, err)
}
return Append(fmter, b, value)
}
func addrAppender(fn AppenderFunc) AppenderFunc {
return func(fmter Formatter, b []byte, v reflect.Value) []byte {
if !v.CanAddr() {
err := fmt.Errorf("bun: Append(nonaddressable %T)", v.Interface())
return dialect.AppendError(b, err)
}
return fn(fmter, b, v.Addr())
}
}
func appendMsgpack(fmter Formatter, b []byte, v reflect.Value) []byte {
hexEnc := internal.NewHexEncoder(b)
enc := msgpack.GetEncoder()
defer msgpack.PutEncoder(enc)
enc.Reset(hexEnc)
if err := enc.EncodeValue(v); err != nil {
return dialect.AppendError(b, err)
}
if err := hexEnc.Close(); err != nil {
return dialect.AppendError(b, err)
}
return hexEnc.Bytes()
}
func AppendQueryAppender(fmter Formatter, b []byte, app QueryAppender) []byte {
bb, err := app.AppendQuery(fmter, b)
if err != nil {
return dialect.AppendError(b, err)
}
return bb
}