sourceafBson::Binary.fan

** (BSON Type) - 
** Wraps binary data and its subType.
** Subtypes from zero to 127 are predefined or reserved. Subtypes from 128-255 are user-defined.
** 
** Binary objects with a default subtype of 'BIN_GENERIC' will be read and returned as a [Buf]`sys::Buf`. 
@Serializable { simple=true }
class Binary {

    ** BSON binary subtype.
    ** The default subtype.
    static const Int BIN_GENERIC    := 0x00
    ** BSON binary subtype.
    static const Int BIN_FUNCTION   := 0x01
    ** BSON binary subtype.
    ** Depreated, do not use.
    static const Int BIN_BINARY_OLD := 0x02
    ** BSON binary subtype.
    ** Depreated, do not use.
    static const Int BIN_UUID_OLD   := 0x03
    ** BSON binary subtype.
    static const Int BIN_UUID       := 0x04
    ** BSON binary subtype.
    static const Int BIN_MD5        := 0x05
    ** BSON binary subtype.
    static const Int BIN_USER       := 0x80

    ** The binary subtype
    const Int subtype
    
    ** The binary data 
    @Transient
    Buf data
    
    ** Creates a BSON Binary instance.
    new make(Buf data, Int subtype := BIN_GENERIC) {
        this.subtype = subtype
        this.data = data
    }
    
    ** For Fantom serialisation
    @NoDoc
    override Str toStr() {
        Buf().writeObj(subtype).writeObj(this.data.dup.seek(0).toBase64).flip.readAllStr
    }
    
    ** For Fantom serialisation
    @NoDoc
    static new fromStr(Str str) {
        buf := str.toBuf
        sub := buf.readObj
        // this next line is horrible. Bad Fantom, bad!
        buf.seek(Buf().writeObj(sub).pos)
        dat := (Str) buf.readObj
        return Binary(Buf.fromBase64(dat), sub)
    }
}