feat: new transformer function concat

application/source/data/datasource.mjs

@@ -53,6 +53,7 @@ class Datasource extends Base {
      */
     constructor() {
         super();
+
         this[internalSymbol] = new ProxyObserver({
             options: extend({}, this.defaults),
         });

application/source/data/datasource/server/restapi.mjs

@@ -169,6 +169,13 @@ class RestAPI extends Server {
     }
 }
 
+/**
+ * @private
+ * @param init
+ * @param key
+ * @param callback
+ * @returns {Promise<string>}
+ */
 function fetchData(init, key, callback) {
     const self = this;
     let response;

application/source/data/transformer.mjs

@@ -8,7 +8,7 @@
 import {Base} from "../types/base.mjs";
 import {getGlobal, getGlobalObject} from "../types/global.mjs";
 import {ID} from "../types/id.mjs";
-import {isArray, isObject, isString} from "../types/is.mjs";
+import {isArray, isObject, isString, isPrimitive} from "../types/is.mjs";
 import {getDocumentTranslations, Translations} from "../i18n/translations.mjs";
 import {
     validateFunction,
@@ -397,6 +397,28 @@ function transform(value) {
 
             return new Pathfinder(value).exists(key);
 
+        case "concat":
+            let pf2 = new Pathfinder(value);
+            let concat = "";
+            while (args.length > 0) {
+                key = args.shift();
+                if (key === undefined) {
+                    throw new Error("missing key parameter");
+                }
+                
+                if (!pf2.exists(key)) {
+                    concat += key;
+                    continue;
+                }
+                let v = pf2.getVia(key);
+                if(!isPrimitive(v)) {
+                    throw new Error("value is not primitive");
+                }
+
+                concat += v;
+            }
+            
+            return concat;
         case "path":
             key = args.shift();
             if (key === undefined) {

development/package.json

@@ -32,12 +32,12 @@
     "create-polyfill-service-url": "^2.2.6",
     "crypt": "^0.0.2",
     "cssnano": "^5.1.15",
-    "esbuild": "^0.17.8",
+    "esbuild": "^0.17.10",
     "flow-bin": "^0.200.0",
     "fs": "0.0.1-security",
     "glob": "^8.1.0",
     "graphviz": "^0.0.9",
-    "jsdoc": "^4.0.1",
+    "jsdoc": "^4.0.2",
     "jsdoc-external-example": "github:volker-schukai/jsdoc-external-example",
     "jsdoc-plantuml": "^1.0.2",
     "jsdom": "^21.1.0",
@@ -50,7 +50,7 @@
     "postcss-import": "^15.1.0",
     "postcss-load-config": "^4.0.1",
     "postcss-mixins": "^9.0.4",
-    "postcss-nested": "^6.0.0",
+    "postcss-nested": "^6.0.1",
     "postcss-nesting": "^11.2.1",
     "postcss-normalize": "^10.0.1",
     "postcss-responsive-type": "^1.0.0",
@@ -61,11 +61,11 @@
     "url": "^0.11.0",
     "url-exist": "3.0.1",
     "util": "^0.12.5",
-    "vite": "^4.1.2",
+    "vite": "^4.1.3",
     "vite-plugin-banner": "^0.7.0",
     "vite-plugin-list-directory-contents": "^1.4.5",
     "vite-plugin-minify": "^1.5.2",
-    "vite-plugin-mkcert": "^1.13.1",
+    "vite-plugin-mkcert": "^1.13.2",
     "ws": "^8.12.1"
   }
 }

development/test/cases/data/transformer.mjs

@@ -27,6 +27,7 @@ describe('Transformer', function () {
     describe('Transformer.run()', function () {
 
         [
+            ['concat:a.b.c:test:a.b.d', {a: {b: {c: 4, d: 6}}}, "4test6"],
             ['??:a', null, 'a'],
             ['??:a', undefined, 'a'],
             ['??:a', 'true', 'true'],