Added setActionVisibility functionality

Author: estruyf

src/controls/taxonomyPicker/Term.tsx

@@ -90,10 +90,7 @@ export default class Term extends React.Component<ITermProps, ITermState> {
     } else if (updateAction.updateActionType === UpdateType.selectTerm) {
       // Only select the term when not disabled or hidden
       if (!this.state.disabled && !this.state.hidden) {
-        this.setState({
-          selected: updateAction.value as boolean
-        });
-        this.props.changedCallback(this.props.term, updateAction.value as boolean);
+        this._handleChange(null, updateAction.value as boolean);
       }
     } else {
       this.props.updateTaxonomyTree();

src/controls/taxonomyPicker/termActions/ITermsActions.ts

@@ -132,7 +132,7 @@ export interface ITermAction {
   * Method checks if the current term is supported.
   * @param currentTerm
   */
-  applyToTerm: (currentTerm: ITerm, triggerActionCallback: (updateAction: UpdateAction) => void) => Promise<boolean> | boolean;
+  applyToTerm: (currentTerm: ITerm, triggerActionCallback: (updateAction: UpdateAction) => void, setVisibility: (actionId: string, isHidden: boolean) => void) => Promise<boolean> | boolean;
   /**
    * Method to be executed when action is fired.
    */

src/controls/taxonomyPicker/termActions/TermActionsControl.tsx

@@ -2,6 +2,7 @@ import * as React from 'react';
 import { ITermAction, ITermActionsControlProps, ITermActionsControlState, TermActionsDisplayMode, TermActionsDisplayStyle } from './ITermsActions';
 import { DropdownTermAction } from './DropdownTermAction';
 import ButtonTermAction from './ButtonTermAction';
+import { find } from 'office-ui-fabric-react/lib/Utilities';
 
 export default class TermActionsControl extends React.Component<ITermActionsControlProps, ITermActionsControlState> {
 
@@ -38,7 +39,7 @@ export default class TermActionsControl extends React.Component<ITermActionsCont
 
     if (termActions.actions) {
       for (const action of termActions.actions) {
-        const available = await action.applyToTerm(term, this.props.termActionCallback);
+        const available = await action.applyToTerm(term, this.props.termActionCallback, this.setActionVisibility);
         if (available) {
           availableActions.push(action);
         }
@@ -50,6 +51,20 @@ export default class TermActionsControl extends React.Component<ITermActionsCont
     });
   }
 
+  /**
+   * Sets the visibility of a certain action
+   * @param isHidden
+   */
+  private setActionVisibility(actionId: string, isHidden: boolean) {
+    this.setState((prevState: ITermActionsControlState) => {
+      const action = find(prevState.availableActions, a => a.id === actionId);
+      action.hidden = isHidden;
+      return {
+        availableActions: prevState.availableActions
+      };
+    });
+  }
+
   /**
    * Default React render method
    */