package pgdialect import ( "database/sql/driver" "encoding/hex" "fmt" "reflect" "strconv" "time" "unicode/utf8" "github.com/uptrace/bun/dialect" "github.com/uptrace/bun/schema" ) var ( driverValuerType = reflect.TypeOf((*driver.Valuer)(nil)).Elem() stringType = reflect.TypeOf((*string)(nil)).Elem() sliceStringType = reflect.TypeOf([]string(nil)) intType = reflect.TypeOf((*int)(nil)).Elem() sliceIntType = reflect.TypeOf([]int(nil)) int64Type = reflect.TypeOf((*int64)(nil)).Elem() sliceInt64Type = reflect.TypeOf([]int64(nil)) float64Type = reflect.TypeOf((*float64)(nil)).Elem() sliceFloat64Type = reflect.TypeOf([]float64(nil)) ) func arrayAppend(fmter schema.Formatter, b []byte, v interface{}) []byte { switch v := v.(type) { case int64: return strconv.AppendInt(b, v, 10) case float64: return dialect.AppendFloat64(b, v) case bool: return dialect.AppendBool(b, v) case []byte: return arrayAppendBytes(b, v) case string: return arrayAppendString(b, v) case time.Time: return fmter.Dialect().AppendTime(b, v) default: err := fmt.Errorf("pgdialect: can't append %T", v) return dialect.AppendError(b, err) } } func arrayAppendStringValue(fmter schema.Formatter, b []byte, v reflect.Value) []byte { return arrayAppendString(b, v.String()) } func arrayAppendBytesValue(fmter schema.Formatter, b []byte, v reflect.Value) []byte { return arrayAppendBytes(b, v.Bytes()) } func arrayAppendDriverValue(fmter schema.Formatter, b []byte, v reflect.Value) []byte { iface, err := v.Interface().(driver.Valuer).Value() if err != nil { return dialect.AppendError(b, err) } return arrayAppend(fmter, b, iface) } //------------------------------------------------------------------------------ func (d *Dialect) arrayAppender(typ reflect.Type) schema.AppenderFunc { kind := typ.Kind() switch kind { case reflect.Ptr: if fn := d.arrayAppender(typ.Elem()); fn != nil { return schema.PtrAppender(fn) } case reflect.Slice, reflect.Array: // ok: default: return nil } elemType := typ.Elem() if kind == reflect.Slice { switch elemType { case stringType: return appendStringSliceValue case intType: return appendIntSliceValue case int64Type: return appendInt64SliceValue case float64Type: return appendFloat64SliceValue } } appendElem := d.arrayElemAppender(elemType) if appendElem == nil { panic(fmt.Errorf("pgdialect: %s is not supported", typ)) } return func(fmter schema.Formatter, b []byte, v reflect.Value) []byte { kind := v.Kind() switch kind { case reflect.Ptr, reflect.Slice: if v.IsNil() { return dialect.AppendNull(b) } } if kind == reflect.Ptr { v = v.Elem() } b = append(b, '\'') b = append(b, '{') for i := 0; i < v.Len(); i++ { elem := v.Index(i) b = appendElem(fmter, b, elem) b = append(b, ',') } if v.Len() > 0 { b[len(b)-1] = '}' // Replace trailing comma. } else { b = append(b, '}') } b = append(b, '\'') return b } } func (d *Dialect) arrayElemAppender(typ reflect.Type) schema.AppenderFunc { if typ.Implements(driverValuerType) { return arrayAppendDriverValue } switch typ.Kind() { case reflect.String: return arrayAppendStringValue case reflect.Slice: if typ.Elem().Kind() == reflect.Uint8 { return arrayAppendBytesValue } } return schema.Appender(d, typ) } func appendStringSliceValue(fmter schema.Formatter, b []byte, v reflect.Value) []byte { ss := v.Convert(sliceStringType).Interface().([]string) return appendStringSlice(b, ss) } func appendStringSlice(b []byte, ss []string) []byte { if ss == nil { return dialect.AppendNull(b) } b = append(b, '\'') b = append(b, '{') for _, s := range ss { b = arrayAppendString(b, s) b = append(b, ',') } if len(ss) > 0 { b[len(b)-1] = '}' // Replace trailing comma. } else { b = append(b, '}') } b = append(b, '\'') return b } func appendIntSliceValue(fmter schema.Formatter, b []byte, v reflect.Value) []byte { ints := v.Convert(sliceIntType).Interface().([]int) return appendIntSlice(b, ints) } func appendIntSlice(b []byte, ints []int) []byte { if ints == nil { return dialect.AppendNull(b) } b = append(b, '\'') b = append(b, '{') for _, n := range ints { b = strconv.AppendInt(b, int64(n), 10) b = append(b, ',') } if len(ints) > 0 { b[len(b)-1] = '}' // Replace trailing comma. } else { b = append(b, '}') } b = append(b, '\'') return b } func appendInt64SliceValue(fmter schema.Formatter, b []byte, v reflect.Value) []byte { ints := v.Convert(sliceInt64Type).Interface().([]int64) return appendInt64Slice(b, ints) } func appendInt64Slice(b []byte, ints []int64) []byte { if ints == nil { return dialect.AppendNull(b) } b = append(b, '\'') b = append(b, '{') for _, n := range ints { b = strconv.AppendInt(b, n, 10) b = append(b, ',') } if len(ints) > 0 { b[len(b)-1] = '}' // Replace trailing comma. } else { b = append(b, '}') } b = append(b, '\'') return b } func appendFloat64SliceValue(fmter schema.Formatter, b []byte, v reflect.Value) []byte { floats := v.Convert(sliceFloat64Type).Interface().([]float64) return appendFloat64Slice(b, floats) } func appendFloat64Slice(b []byte, floats []float64) []byte { if floats == nil { return dialect.AppendNull(b) } b = append(b, '\'') b = append(b, '{') for _, n := range floats { b = dialect.AppendFloat64(b, n) b = append(b, ',') } if len(floats) > 0 { b[len(b)-1] = '}' // Replace trailing comma. } else { b = append(b, '}') } b = append(b, '\'') return b } //------------------------------------------------------------------------------ func arrayAppendBytes(b []byte, bs []byte) []byte { if bs == nil { return dialect.AppendNull(b) } b = append(b, `"\\x`...) s := len(b) b = append(b, make([]byte, hex.EncodedLen(len(bs)))...) hex.Encode(b[s:], bs) b = append(b, '"') return b } func arrayAppendString(b []byte, s string) []byte { b = append(b, '"') for _, r := range s { switch r { case 0: // ignore case '\'': b = append(b, "''"...) case '"': b = append(b, '\\', '"') case '\\': b = append(b, '\\', '\\') default: if r < utf8.RuneSelf { b = append(b, byte(r)) break } l := len(b) if cap(b)-l < utf8.UTFMax { b = append(b, make([]byte, utf8.UTFMax)...) } n := utf8.EncodeRune(b[l:l+utf8.UTFMax], r) b = b[:l+n] } } b = append(b, '"') return b }