feat: Add UnarchiveReader function to support io.ReadSeeker input in nskeyedarchiver

ios/nskeyedarchiver/archiverutils.go

@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
+	"io"
 
 	plist "howett.net/plist"
 )
@@ -26,16 +27,13 @@ func toUidList(list []interface{}) []plist.UID {
 	return result
 }
 
-// plistFromBytes decodes a binary or XML based PLIST using the amazing github.com/DHowett/go-plist library and returns an interface{} or propagates the error raised by the library.
-func plistFromBytes(plistBytes []byte) (interface{}, error) {
-	var test interface{}
-	decoder := plist.NewDecoder(bytes.NewReader(plistBytes))
+// plistFromReader decodes a binary or XML based PLIST using the amazing github.com/DHowett/go-plist library and returns an interface{} or propagates the error raised by the library.
+func plistFromReader(r io.ReadSeeker) (interface{}, error) {
+	var v interface{}
+	decoder := plist.NewDecoder(r)
 
-	err := decoder.Decode(&test)
-	if err != nil {
-		return test, err
-	}
-	return test, nil
+	err := decoder.Decode(&v)
+	return v, err
 }
 
 // ToPlist converts a given struct to a Plist using the

ios/nskeyedarchiver/unarchiver.go

@@ -1,7 +1,9 @@
 package nskeyedarchiver
 
 import (
+	"bytes"
 	"fmt"
+	"io"
 	"runtime/debug"
 
 	log "github.com/sirupsen/logrus"
@@ -13,6 +15,14 @@ import (
 // NSArray, NSMutableArray, NSSet and NSMutableSet will transformed into []interface{}
 // NSDictionary and NSMutableDictionary will be transformed into map[string] interface{}. I might add non string keys later.
 func Unarchive(xml []byte) (result []interface{}, err error) {
+	return UnarchiveReader(bytes.NewReader(xml))
+}
+
+// UnarchiveReader extracts NSKeyedArchiver Plists from an io.ReadSeeker, either in XML or Binary format, and returns an array of the archived objects converted to usable Go Types.
+// Primitives will be extracted just like regular Plist primitives (string, float64, int64, []uint8 etc.).
+// NSArray, NSMutableArray, NSSet and NSMutableSet will be transformed into []interface{}.
+// NSDictionary and NSMutableDictionary will be transformed into map[string]interface{}. Non-string keys might be added later.
+func UnarchiveReader(r io.ReadSeeker) (result []interface{}, err error) {
 	defer func() {
 		if r := recover(); r != nil {
 			stacktrace := string(debug.Stack())
@@ -21,7 +31,7 @@ func Unarchive(xml []byte) (result []interface{}, err error) {
 	}()
 
 	SetupDecoders()
-	plist, err := plistFromBytes(xml)
+	plist, err := plistFromReader(r)
 	if err != nil {
 		return nil, err
 	}