Bugfixes, LocalizedText is an entity again

js/serialization/Serializer.js

@@ -11,17 +11,20 @@ export default class Serializer {
 
     static grammar = Parsimmon.createLanguage(new Grammar())
 
-    constructor(entityType, prefix = "", separator = ",", trailingSeparator = false) {
+    constructor(entityType, prefix, separator, trailingSeparator, attributeValueConjunctionSign, attributeKeyPrinter) {
         this.entityType = entityType
-        this.prefix = prefix
-        this.separator = separator
-        this.trailingSeparator = trailingSeparator
+        this.prefix = prefix ?? ""
+        this.separator = separator ?? ","
+        this.trailingSeparator = trailingSeparator ?? false
+        this.attributeValueConjunctionSign = attributeValueConjunctionSign ?? "="
+        this.attributeKeyPrinter = attributeKeyPrinter ?? (k => k.join("."))
     }
 
     writeValue(value) {
         if (value === null) {
             return "()"
         }
+        // This is an exact match (and not instanceof) to hit also primitive types (by accessing value.constructor they are converted to objects automatically)
         switch (value?.constructor) {
             case Function:
                 return this.writeValue(value())
@@ -51,7 +54,11 @@ export default class Serializer {
                 // Recursive call when finding an object
                 result += this.subWrite(fullKey, value, this.prefix, this.separator)
             } else if (this.showProperty(fullKey, value)) {
-                result += (result.length ? this.separator : "") + this.prefix + fullKey.join(".") + "=" + this.writeValue(value)
+                result += (result.length ? this.separator : "")
+                    + this.prefix
+                    + this.attributeKeyPrinter(fullKey)
+                    + this.attributeValueConjunctionSign
+                    + this.writeValue(value)
             }
         }
         if (this.trailingSeparator && result.length) {