feat: lots more improvements

Signed-off-by: Sebastian Krupinski <krupinski01@gmail.com>

src/models/service.ts

@@ -10,15 +10,20 @@ import type {
 } from "@/types/service";
 import { Identity } from './identity';
 import { Location } from './location';
+import { MutationProxy } from './mutation-proxy';
+import { clonePlain } from './clone-plain';
 
 export class ServiceObject implements ServiceModelInterface {
 
+    private _original: ServiceInterface;
+    private _mutated: Partial<ServiceInterface>;
+    private _mutationProxy = new MutationProxy<ServiceInterface>(() => this._original, () => this._mutated);
     _data!: ServiceInterface;
-    _location: Location | null = null;
-    _identity: Identity | null = null;
+    _location: Location | null | undefined = undefined;
+    _identity: Identity | null | undefined = undefined;
 
     constructor() {
-        this._data = {
+        this._original = {
             '@type': 'mail:service',
             version: 1,
             provider: '',
@@ -27,43 +32,64 @@ export class ServiceObject implements ServiceModelInterface {
             enabled: false,
             capabilities: {}
         };
+        this._mutated = {};
+        this._data = this._mutationProxy.create();
     }
 
     fromJson(data: ServiceInterface): ServiceObject {
-        this._data = data;
+        this._original = clonePlain(data);
+        this._mutated = {};
+        this._data = this._mutationProxy.create();
+        this._location = undefined;
+        this._identity = undefined;
         return this;
     }
 
-    toJson(): ServiceInterface {
-        const json = {
-            ...this._data,
-            capabilities: this._data.capabilities ? { ...this._data.capabilities } : this._data.capabilities,
-            secondaryAddresses: this._data.secondaryAddresses ? [...this._data.secondaryAddresses] : this._data.secondaryAddresses,
-            auxiliary: this._data.auxiliary ? { ...this._data.auxiliary } : this._data.auxiliary,
-        };
-
-        if (this._location !== null) {
-            json.location = this._location.toJson();
+    toJson(): ServiceInterface;
+    toJson(delta: true): Partial<ServiceInterface>;
+    toJson(delta?: boolean): ServiceInterface | Partial<ServiceInterface> {
+        if (this._location !== undefined) {
+            if (!delta) {
+                // handled below to preserve full ServiceInterface typing
+            }
         }
 
-        if (this._identity !== null) {
-            json.identity = this._identity.toJson();
+        if (delta) {
+            const json: Partial<ServiceInterface> = clonePlain(this._mutated);
+
+            if (this._location?.mutated()) {
+                json.location = this._location.toJson(true) as ServiceInterface['location'];
+            }
+
+            if (this._identity?.mutated()) {
+                json.identity = this._identity.toJson(true) as ServiceInterface['identity'];
+            }
+
+            return json;
+        }
+
+        const json: ServiceInterface = {
+            ...clonePlain(this._original),
+            ...clonePlain(this._mutated),
+        };
+
+        if (this._location !== undefined) {
+            json.location = this._location ? this._location.toJson() : null;
+        }
+
+        if (this._identity !== undefined) {
+            json.identity = this._identity ? this._identity.toJson() : null;
         }
 
         return json;
     }
 
     clone(): ServiceObject {
-        const cloned = new ServiceObject();
-        cloned._data = {
-            ...this._data,
-            capabilities: this._data.capabilities ? { ...this._data.capabilities } : this._data.capabilities,
-            secondaryAddresses: this._data.secondaryAddresses ? [...this._data.secondaryAddresses] : this._data.secondaryAddresses,
-            auxiliary: this._data.auxiliary ? { ...this._data.auxiliary } : this._data.auxiliary,
-        };
-        cloned._location = this._location ? this._location.clone() : null;
-        cloned._identity = this._identity ? this._identity.clone() : null;
-        return cloned;
+        return new ServiceObject().fromJson(this.toJson());
+    }
+
+    mutated(): boolean {
+        return Reflect.ownKeys(this._mutated).length > 0 || (this._location?.mutated() ?? false) || (this._identity?.mutated() ?? false);
     }
 
     capable(capability: keyof ServiceCapabilitiesInterface): boolean {
@@ -96,10 +122,18 @@ export class ServiceObject implements ServiceModelInterface {
         return this._data.primaryAddress ?? null;
     }
 
+    set primaryAddress(value: string | null) {
+        this._data.primaryAddress = value;
+    }
+
     get secondaryAddresses(): string[] {
         return this._data.secondaryAddresses ?? [];
     }
 
+    set secondaryAddresses(value: string[] | null) {
+        this._data.secondaryAddresses = value;
+    }
+
     /** Mutable Properties */
 
     get label(): string | null {
@@ -119,15 +153,16 @@ export class ServiceObject implements ServiceModelInterface {
     }
 
     get location(): Location | null {
-        if (this._location) {
+        if (this._location !== undefined) {
             return this._location;
         }
-        else if (this._location === null && this._data.location) {
-            const location = Location.fromJson(this._data.location as ServiceLocation);
-            this._location = location;
-            return location;
+
+        if (this._data.location) {
+            this._location = Location.fromJson(this._data.location as ServiceLocation);
+            return this._location;
         }
 
+        this._location = null;
         return null;
     }
 
@@ -136,15 +171,16 @@ export class ServiceObject implements ServiceModelInterface {
     }
 
     get identity(): Identity | null {
-        if (this._identity) {
+        if (this._identity !== undefined) {
             return this._identity;
         }
-        else if (this._data.identity) {
-            const identity = Identity.fromJson(this._data.identity);
-            this._identity = identity;
-            return identity;
+
+        if (this._data.identity) {
+            this._identity = Identity.fromJson(this._data.identity);
+            return this._identity;
         }
 
+        this._identity = null;
         return null;
     }
 
@@ -155,7 +191,7 @@ export class ServiceObject implements ServiceModelInterface {
     get auxiliary(): Record<string, any> {
         return this._data.auxiliary ?? {};
     }
-    
+
     set auxiliary(value: Record<string, any>) {
         this._data.auxiliary = value;
     }