Typing: add 'readonly' to tag method, add 'applyOn' convenience method

src/Logic/Tags/And.ts

@@ -159,7 +159,7 @@ export class And extends TagsFilter {
         return [].concat(...this.and.map((subkeys) => subkeys.usedTags()))
     }
 
-    asChange(properties: Record<string, string>): { k: string; v: string }[] {
+    asChange(properties: Readonly<Record<string, string>>): { k: string; v: string }[] {
         const result = []
         for (const tagsFilter of this.and) {
             result.push(...tagsFilter.asChange(properties))

src/Logic/Tags/ComparingTag.ts

@@ -3,7 +3,7 @@ import { TagConfigJson } from "../../Models/ThemeConfig/Json/TagConfigJson"
 import { Tag } from "./Tag"
 import { ExpressionSpecification } from "maplibre-gl"
 
-export default class ComparingTag implements TagsFilter {
+export default class ComparingTag extends TagsFilter {
     private readonly _key: string
     private readonly _predicate: (value: string) => boolean
     private readonly _representation: "<" | ">" | "<=" | ">="
@@ -15,13 +15,14 @@ export default class ComparingTag implements TagsFilter {
         representation: "<" | ">" | "<=" | ">=",
         boundary: string
     ) {
+        super()
         this._key = key
         this._predicate = predicate
         this._representation = representation
         this._boundary = boundary
     }
 
-    asChange(_: Record<string, string>): { k: string; v: string }[] {
+    asChange(_: Readonly<Record<string, string>>): { k: string; v: string }[] {
         throw "A comparable tag can not be used to be uploaded to OSM"
     }
 

src/Logic/Tags/Or.ts

@@ -96,7 +96,7 @@ export class Or extends TagsFilter {
         return [].concat(...this.or.map((subkeys) => subkeys.usedTags()))
     }
 
-    asChange(properties: Record<string, string>): { k: string; v: string }[] {
+    asChange(properties: Readonly<Record<string, string>>): { k: string; v: string }[] {
         const result = []
         for (const tagsFilter of this.or) {
             result.push(...tagsFilter.asChange(properties))

src/Logic/Tags/SubstitutingTag.ts

@@ -13,12 +13,13 @@ import { ExpressionSpecification } from "maplibre-gl"
  * The 'key' is always fixed and should not contain substitutions.
  * This cannot be used to query features
  */
-export default class SubstitutingTag implements TagsFilter {
+export default class SubstitutingTag extends TagsFilter {
     private readonly _key: string
     private readonly _value: string
     private readonly _invert: boolean
 
     constructor(key: string, value: string, invert = false) {
+        super()
         this._key = key
         this._value = value
         this._invert = invert
@@ -99,7 +100,7 @@ export default class SubstitutingTag implements TagsFilter {
         return []
     }
 
-    asChange(properties: Record<string, string>): { k: string; v: string }[] {
+    asChange(properties: Readonly<Record<string, string>>): { k: string; v: string }[] {
         if (this._invert) {
             throw "An inverted substituting tag can not be used to create a change"
         }

src/Logic/Tags/TagsFilter.ts

@@ -15,9 +15,9 @@ export abstract class TagsFilter {
     abstract matchesProperties(properties: Record<string, string>): boolean
 
     abstract asHumanString(
-        linkToWiki: boolean,
-        shorten: boolean,
-        properties: Record<string, string>
+        linkToWiki?: boolean,
+        shorten?: boolean,
+        properties?: Record<string, string>
     ): string
 
     abstract asJson(): TagConfigJson
@@ -34,9 +34,18 @@ export abstract class TagsFilter {
      * Converts the tagsFilter into a list of key-values that should be uploaded to OSM.
      * Throws an error if not applicable.
      *
-     * Note: properties are the already existing tags-object. It is only used in the substituting tag
+     * @param properties are the already existing tags-object. It is only used in the substituting tag and will not be changed
      */
-    abstract asChange(properties: Record<string, string>): { k: string; v: string }[]
+    abstract asChange(properties: Readonly<Record<string, string>>): { k: string; v: string }[]
+
+    public applyOn(properties: Readonly<Record<string, string>>): Record<string, string> {
+        const copy = { ...properties }
+        const changes = this.asChange(properties)
+        for (const { k, v } of changes) {
+            copy[k] = v
+        }
+        return copy
+    }
 
     /**
      * Returns an optimized version (or self) of this tagsFilter