UI: RuleChain improvements.

@@ -356,7 +356,7 @@ function utf8ToBytes(input: string, units?: number): number[] {
   return bytes;
 }
 
-export function deepClone<T>(target: T): T {
+export function deepClone<T>(target: T, ignoreFields?: string[]): T {
   if (target === null) {
     return target;
   }
@@ -371,7 +371,9 @@ export function deepClone<T>(target: T): T {
   if (typeof target === 'object' && target !== {}) {
     const cp = { ...(target as { [key: string]: any }) } as { [key: string]: any };
     Object.keys(cp).forEach(k => {
-      cp[k] = deepClone<any>(cp[k]);
+      if (!ignoreFields || ignoreFields.indexOf(k) === -1) {
+        cp[k] = deepClone<any>(cp[k]);
+      }
     });
     return cp as T;
   }

@@ -16,39 +16,25 @@
 
 import {
   AfterViewInit,
-  Component, ElementRef,
-  EventEmitter, forwardRef,
+  Component,
+  ComponentRef,
+  forwardRef,
   Input,
-  OnChanges,
+  OnDestroy,
   OnInit,
-  Output,
-  SimpleChanges,
   ViewChild,
-  Compiler,
-  Injector, ComponentRef, OnDestroy
+  ViewContainerRef
 } from '@angular/core';
-import { PageComponent } from '@shared/components/page.component';
-import { Store } from '@ngrx/store';
-import { AppState } from '@core/core.state';
-import { ControlValueAccessor, FormBuilder, FormGroup, NG_VALUE_ACCESSOR, NgForm, Validators } from '@angular/forms';
-import { FcRuleNode, FcRuleEdge } from './rulechain-page.models';
-import { RuleNodeType, LinkLabel, RuleNodeDefinition, RuleNodeConfiguration, IRuleNodeConfigurationComponent } from '@shared/models/rule-node.models';
-import { EntityType } from '@shared/models/entity-type.models';
-import { Observable, of, Subscription } from 'rxjs';
+import { ControlValueAccessor, FormBuilder, FormGroup, NG_VALUE_ACCESSOR, Validators } from '@angular/forms';
+import {
+  IRuleNodeConfigurationComponent,
+  RuleNodeConfiguration,
+  RuleNodeDefinition
+} from '@shared/models/rule-node.models';
+import { Subscription } from 'rxjs';
 import { RuleChainService } from '@core/http/rule-chain.service';
 import { coerceBooleanProperty } from '@angular/cdk/coercion';
-import { deepClone } from '@core/utils';
-import { EntityAlias } from '@shared/models/alias.models';
-import { TruncatePipe } from '@shared/pipe/truncate.pipe';
-import { MatChipList, MatAutocomplete, MatChipInputEvent, MatAutocompleteSelectedEvent } from '@angular/material';
 import { TranslateService } from '@ngx-translate/core';
-import { COMMA, ENTER, SEMICOLON } from '@angular/cdk/keycodes';
-import { catchError, map, mergeMap, share } from 'rxjs/operators';
-import { DynamicWidgetComponent } from '@home/components/widget/dynamic-widget.component';
-import { SharedModule } from '@shared/shared.module';
-import { WidgetComponentsModule } from '@home/components/widget/widget-components.module';
-import { DynamicComponentFactoryService } from '@core/services/dynamic-component-factory.service';
-import { ViewContainerRef } from '@angular/core';
 import { JsonObjectEditComponent } from '@shared/components/json-object-edit.component';
 
 @Component({

@@ -341,9 +341,9 @@ export class RuleChainPageComponent extends PageComponent
     this.nextNodeID = 1;
     this.nextConnectorID = 1;
 
-    this.selectedObjects.length = 0;
-    this.ruleChainModel.nodes.length = 0;
-    this.ruleChainModel.edges.length = 0;
+    this.selectedObjects = [];
+    this.ruleChainModel.nodes = [];
+    this.ruleChainModel.edges = [];
 
     this.inputConnectorId = this.nextConnectorID++;
     this.ruleChainModel.nodes.push(
@@ -535,7 +535,7 @@ export class RuleChainPageComponent extends PageComponent
       this.editingRuleNodeLink = null;
       this.isEditingRuleNode = true;
       this.editingRuleNodeIndex = this.ruleChainModel.nodes.indexOf(node);
-      this.editingRuleNode = deepClone(node);
+      this.editingRuleNode = deepClone(node, ['component']);
       setTimeout(() => {
         this.ruleNodeComponent.ruleNodeFormGroup.markAsPristine();
       }, 0);
@@ -576,7 +576,7 @@ export class RuleChainPageComponent extends PageComponent
   onRevertRuleNodeEdit() {
     this.ruleNodeComponent.ruleNodeFormGroup.markAsPristine();
     const node = this.ruleChainModel.nodes[this.editingRuleNodeIndex];
-    this.editingRuleNode = deepClone(node);
+    this.editingRuleNode = deepClone(node, ['component']);
   }
 
   onRevertRuleNodeLinkEdit() {
@@ -593,7 +593,7 @@ export class RuleChainPageComponent extends PageComponent
         delete this.editingRuleNode.error;
       }
       this.ruleChainModel.nodes[this.editingRuleNodeIndex] = this.editingRuleNode;
-      this.editingRuleNode = deepClone(this.editingRuleNode);
+      this.editingRuleNode = deepClone(this.editingRuleNode, ['component']);
       this.onModelChanged();
       this.updateRuleNodesHighlight();
     }

@@ -33,13 +33,14 @@
       <div class="drop-area tb-flow-drop"
            flowDrop
            [flow]="flow.flowJs">
-        <label for="select">{{ dropLabel }}</label>
-        <input class="file-input" flowButton [flow]="flow.flowJs" [flowAttributes]="{accept: accept}" id="select">
+        <label for="{{inputId}}">{{ dropLabel }}</label>
+        <input class="file-input" flowButton [flow]="flow.flowJs" [flowAttributes]="{accept: accept}" id="{{inputId}}">
       </div>
     </div>
   </ng-container>
 </div>
 <div>
-  <div *ngIf="!fileName" translate>import.no-file</div>
+  <tb-error *ngIf="!fileName && required && requiredAsError" error="{{ noFileText | translate }}"></tb-error>
+  <div *ngIf="!fileName && !requiredAsError" translate>{{ noFileText }}</div>
   <div *ngIf="fileName">{{ fileName }}</div>
 </div>

@@ -14,7 +14,17 @@
 /// limitations under the License.
 ///
 
-import { AfterViewInit, Component, forwardRef, Input, OnDestroy, ViewChild } from '@angular/core';
+import {
+  AfterViewInit,
+  Component,
+  EventEmitter,
+  forwardRef,
+  Input,
+  OnChanges,
+  OnDestroy,
+  Output, SimpleChanges,
+  ViewChild
+} from '@angular/core';
 import { PageComponent } from '@shared/components/page.component';
 import { Store } from '@ngrx/store';
 import { AppState } from '@core/core.state';
@@ -22,6 +32,7 @@ import { ControlValueAccessor, NG_VALUE_ACCESSOR } from '@angular/forms';
 import { Subscription } from 'rxjs';
 import { coerceBooleanProperty } from '@angular/cdk/coercion';
 import { FlowDirective } from '@flowjs/ngx-flow';
+import { TranslateService } from '@ngx-translate/core';
 
 @Component({
   selector: 'tb-file-input',
@@ -35,7 +46,7 @@ import { FlowDirective } from '@flowjs/ngx-flow';
     }
   ]
 })
-export class FileInputComponent extends PageComponent implements AfterViewInit, OnDestroy, ControlValueAccessor {
+export class FileInputComponent extends PageComponent implements AfterViewInit, OnDestroy, ControlValueAccessor, OnChanges {
 
   @Input()
   label: string;
@@ -44,6 +55,12 @@ export class FileInputComponent extends PageComponent implements AfterViewInit,
   accept = '*/*';
 
   @Input()
+  noFileText = 'import.no-file';
+
+  @Input()
+  inputId = 'select';
+
+  @Input()
   allowedExtensions: string;
 
   @Input()
@@ -64,9 +81,27 @@ export class FileInputComponent extends PageComponent implements AfterViewInit,
     }
   }
 
+  private requiredAsErrorValue: boolean;
+  get requiredAsError(): boolean {
+    return this.requiredAsErrorValue;
+  }
+  @Input()
+  set requiredAsError(value: boolean) {
+    const newVal = coerceBooleanProperty(value);
+    if (this.requiredAsErrorValue !== newVal) {
+      this.requiredAsErrorValue = newVal;
+    }
+  }
+
   @Input()
   disabled: boolean;
 
+  @Input()
+  existingFileName: string;
+
+  @Output()
+  fileNameChanged = new EventEmitter<string>();
+
   fileName: string;
   fileContent: any;
 
@@ -77,7 +112,8 @@ export class FileInputComponent extends PageComponent implements AfterViewInit,
 
   private propagateChange = null;
 
-  constructor(protected store: Store<AppState>) {
+  constructor(protected store: Store<AppState>,
+              public translate: TranslateService) {
     super(store);
   }
 
@@ -135,11 +171,23 @@ export class FileInputComponent extends PageComponent implements AfterViewInit,
   }
 
   writeValue(value: any): void {
-    this.fileName = null;
+    this.fileName = this.existingFileName || null;
+  }
+
+  ngOnChanges(changes: SimpleChanges): void {
+    for (const propName of Object.keys(changes)) {
+      const change = changes[propName];
+      if (change.currentValue !== change.previousValue) {
+        if (propName === 'existingFileName') {
+          this.fileName = this.existingFileName || null;
+        }
+      }
+    }
   }
 
   private updateModel() {
     this.propagateChange(this.fileContent);
+    this.fileNameChanged.emit(this.fileName);
   }
 
   clearFile() {

@@ -24,10 +24,11 @@ import { ComponentDescriptor, ComponentType } from '@shared/models/component-des
 import { EntityType, EntityTypeResource } from '@shared/models/entity-type.models';
 import { Observable } from 'rxjs';
 import { PageComponent } from '@shared/components/page.component';
-import { ComponentFactory, EventEmitter, Inject, OnDestroy, OnInit } from '@angular/core';
+import { AfterViewInit, ComponentFactory, EventEmitter, Inject, OnDestroy, OnInit } from '@angular/core';
 import { RafService } from '@core/services/raf.service';
 import { Store } from '@ngrx/store';
 import { AppState } from '@core/core.state';
+import { AbstractControl, FormGroup } from '@angular/forms';
 
 export enum MsgDataType {
   JSON = 'JSON',
@@ -83,10 +84,28 @@ export interface IRuleNodeConfigurationComponent {
 }
 
 export abstract class RuleNodeConfigurationComponent extends PageComponent implements
-  IRuleNodeConfigurationComponent, OnInit {
+  IRuleNodeConfigurationComponent, OnInit, AfterViewInit {
 
   ruleNodeId: string;
-  configuration: RuleNodeConfiguration;
+
+  configurationValue: RuleNodeConfiguration;
+
+  private configurationSet = false;
+
+  set configuration(value: RuleNodeConfiguration) {
+    this.configurationValue = value;
+    if (!this.configurationSet) {
+      this.configurationSet = true;
+      this.setupConfiguration(value);
+    } else {
+      this.updateConfiguration(value);
+    }
+  }
+
+  get configuration(): RuleNodeConfiguration {
+    return this.configurationValue;
+  }
+
   configurationChangedEmiter = new EventEmitter<RuleNodeConfiguration>();
   configurationChanged = this.configurationChangedEmiter.asObservable();
 
@@ -94,21 +113,77 @@ export abstract class RuleNodeConfigurationComponent extends PageComponent imple
     super(store);
   }
 
-  ngOnInit() {
-    this.onConfigurationSet(this.configuration);
+  ngOnInit() {}
+
+  ngAfterViewInit(): void {
+    setTimeout(() => {
+      if (!this.validateConfig()) {
+        this.configurationChangedEmiter.emit(null);
+      }
+    }, 0);
   }
 
   validate() {
     this.onValidate();
   }
 
-  protected abstract onConfigurationSet(configuration: RuleNodeConfiguration);
+  protected setupConfiguration(configuration: RuleNodeConfiguration) {
+    this.onConfigurationSet(this.prepareInputConfig(configuration));
+    this.updateValidators(false);
+    for (const trigger of this.validatorTriggers()) {
+      const path = trigger.split('.');
+      let control: AbstractControl = this.configForm();
+      for (const part of path) {
+        control = control.get(part);
+      }
+      control.valueChanges.subscribe(() => {
+        this.updateValidators(true);
+      });
+    }
+    this.configForm().valueChanges.subscribe((updated: RuleNodeConfiguration) => {
+      this.onConfigurationChanged(updated);
+    });
+  }
+
+  protected updateConfiguration(configuration: RuleNodeConfiguration) {
+    this.configForm().reset(this.prepareInputConfig(configuration), {emitEvent: false});
+    this.updateValidators(false);
+  }
+
+  protected updateValidators(emitEvent: boolean) {
+  }
+
+  protected validatorTriggers(): string[] {
+    return [];
+  }
+
+  protected onConfigurationChanged(updated: RuleNodeConfiguration) {
+    this.configurationValue = updated;
+    if (this.validateConfig()) {
+      this.configurationChangedEmiter.emit(this.prepareOutputConfig(updated));
+    } else {
+      this.configurationChangedEmiter.emit(null);
+    }
+  }
 
-  protected notifyConfigurationUpdated(configuration: RuleNodeConfiguration) {
-    this.configurationChangedEmiter.emit(configuration);
+  protected prepareInputConfig(configuration: RuleNodeConfiguration): RuleNodeConfiguration {
+    return configuration;
+  }
+
+  protected prepareOutputConfig(configuration: RuleNodeConfiguration): RuleNodeConfiguration {
+    return configuration;
+  }
+
+  protected validateConfig(): boolean {
+    return this.configForm().valid;
   }
 
   protected onValidate() {}
+
+  protected abstract configForm(): FormGroup;
+
+  protected abstract onConfigurationSet(configuration: RuleNodeConfiguration);
+
 }