Feat polifill for getFirstError and make existsError accept more than one field (kcContext.messagePerField)

src/bin/keycloakify/generateFtl/ftl_object_to_js_code_declaring_an_object.ftl

@@ -79,7 +79,9 @@
             </#if>
 
         },
-        "existsError": function (fieldName) {
+        "existsError": function (){
+
+            function existsError_singleFieldName(fieldName) {
 
                 <#if !messagesPerField?? || !(messagesPerField?is_hash)>   
                     throw new Error("You're not supposed to use messagesPerField.printIfExists in this page");
@@ -121,6 +123,18 @@
 
                 </#if>
 
+            }
+
+            for( let i = 0; i < arguments.length; i++ ){
+
+                if( existsError_singleFieldName(arguments[i]) ){
+                    return true;
+                }
+
+            }
+
+            return false;
+
         },
         "get": function (fieldName) {
 
@@ -219,6 +233,19 @@
                 throw new Error(fieldName + "is probably runtime generated, see: https://docs.keycloakify.dev/limitations#field-names-cant-be-runtime-generated");
             </#if>
 
+        },
+        "getFirstError": function () {
+
+            for( let i = 0; i < arguments.length; i++ ){
+
+                const fieldName = arguments[i];
+
+                if( out.messagesPerField.existsError(fieldName) ){
+                    return out.messagesPerField.get(fieldName);
+                }
+
+            }
+
         }
     };
 

src/login/kcContext/KcContext.ts

@@ -101,7 +101,7 @@ export declare namespace KcContext {
              * @param fields
              * @return boolean
              */
-            existsError: (fieldName: string) => boolean;
+            existsError: (fieldName: string, ...otherFiledNames: string[]) => boolean;
             /**
              * Get message for given field.
              *
@@ -116,6 +116,8 @@ export declare namespace KcContext {
              * @return boolean
              */
             exists: (fieldName: string) => boolean;
+
+            getFirstError: (...fieldNames: string[]) => string;
         };
         properties: Record<string, string | undefined>;
         authenticationSession?: {
@@ -165,6 +167,7 @@ export declare namespace KcContext {
                 alias: string;
                 providerId: string;
                 displayName: string;
+                iconClasses?: string;
             }[];
         };
     };