fix: ensure an error msg is displayed when max-no of files is 0 and r…

app/client/cypress/e2e/Regression/ClientSide/Widgets/Filepicker/FilePicker_Max_No_Spec.ts

@@ -0,0 +1,35 @@
+import {
+    agHelper,
+    draggableWidgets,
+    entityExplorer,
+    propPane,
+  } from "../../../../../support/Objects/ObjectsCore";
+  import EditorNavigation, {
+    EntityType,
+  } from "../../../../../support/Pages/EditorNavigation";
+  const commonlocators = require("../../../../../locators/commonlocators.json");
+
+  describe(
+    "FilePicker Widget Functionality",
+    { tags: ["@tag.Widget", "@tag.Filepicker"] },
+    function () {
+      before(() => {
+        entityExplorer.DragDropWidgetNVerify(draggableWidgets.FILEPICKER);
+      });
+
+      it("Should display an error message when clicked on filepicker when max no-of files are set to 0", () => {
+        EditorNavigation.SelectEntityByName("FilePicker1", EntityType.Widget);
+        propPane.UpdatePropertyFieldValue("Max no. of files", "1");
+        const fixturePath = "cypress/fixtures/dummy.pdf";
+        cy.get(commonlocators.filepickerv2).click();
+        cy.get(commonlocators.filePickerInput).first().selectFile(fixturePath, {
+          force: true,
+        });
+        cy.get(commonlocators.filePickerUploadButton).click();
+        cy.get(commonlocators.dashboardItemName).contains("dummy.pdf");
+        agHelper.GetNClick(commonlocators.filePickerRemoveButton, 0, true);
+        propPane.UpdatePropertyFieldValue("Max no. of files", "0");
+        cy.get(commonlocators.filepickerv2).click();
+      });
+    },
+  );

app/client/src/widgets/FilePickerWidgetV2/component/index.tsx

@@ -2,6 +2,12 @@ import React from "react";
 import type { ComponentProps } from "widgets/BaseComponent";
 import { BaseButton } from "widgets/ButtonWidget/component";
 import { Colors } from "constants/Colors";
+import { theme } from "constants/DefaultTheme";
+import styled from "styled-components";
+
+const ErrorMessage = styled.div`
+  color: ${theme.colors.error};
+`;
 
 function FilePickerComponent(props: FilePickerComponentProps) {
   let computedLabel = props.label;
@@ -11,19 +17,22 @@ function FilePickerComponent(props: FilePickerComponentProps) {
   }
 
   return (
-    <BaseButton
-      borderRadius={props.borderRadius}
-      boxShadow={props.boxShadow}
-      buttonColor={props.buttonColor}
-      disabled={props.isDisabled}
-      loading={props.isLoading}
-      maxWidth={props.maxWidth}
-      minHeight={props.minHeight}
-      minWidth={props.minWidth}
-      onClick={props.openModal}
-      shouldFitContent={props.shouldFitContent}
-      text={computedLabel}
-    />
+    <>
+      <BaseButton
+        borderRadius={props.borderRadius}
+        boxShadow={props.boxShadow}
+        buttonColor={props.buttonColor}
+        disabled={props.isDisabled}
+        loading={props.isLoading}
+        maxWidth={props.maxWidth}
+        minHeight={props.minHeight}
+        minWidth={props.minWidth}
+        onClick={props.openModal}
+        shouldFitContent={props.shouldFitContent}
+        text={computedLabel}
+      />
+      {props.errorMessage && <ErrorMessage>{props.errorMessage}</ErrorMessage>}
+    </>
   );
 }
 export interface FilePickerComponentProps extends ComponentProps {
@@ -38,10 +47,12 @@ export interface FilePickerComponentProps extends ComponentProps {
   maxWidth?: number;
   minWidth?: number;
   minHeight?: number;
+  maxNumFiles?: number;
+  errorMessage?: string | null;
 }
 
 FilePickerComponent.defaultProps = {
   backgroundColor: Colors.GREEN,
 };
 
-export default FilePickerComponent;
+export default FilePickerComponent;

app/client/src/widgets/FilePickerWidgetV2/constants.ts

@@ -1,3 +1,5 @@
 import { FileDataTypes } from "WidgetProvider/constants";
 
 export default FileDataTypes;
+
+export const ERROR_MESSAGE="Cannot upload any files"

app/client/src/widgets/FilePickerWidgetV2/widget/index.tsx

@@ -18,7 +18,7 @@ import { importUppy, isUppyLoaded } from "utils/importUppy";
 import type { WidgetProps, WidgetState } from "widgets/BaseWidget";
 import BaseWidget from "widgets/BaseWidget";
 import FilePickerComponent from "../component";
-import FileDataTypes from "../constants";
+import FileDataTypes, { ERROR_MESSAGE } from "../constants";
 import { DefaultAutocompleteDefinitions } from "widgets/WidgetUtils";
 import type {
   AnvilConfig,
@@ -49,6 +49,7 @@ class FilePickerWidget extends BaseWidget<
       areFilesLoading: false,
       isWaitingForUppyToLoad: false,
       isUppyModalOpen: false,
+      errorMessage: null,
     };
   }
 
@@ -318,7 +319,7 @@ class FilePickerWidget extends BaseWidget<
           {
             propertyName: "isVisible",
             label: "Visible",
-            helpText: "Controls the visibility of the widget",
+            helpText: "Controls visibility of the widget ",
             controlType: "SWITCH",
             isJSConvertible: true,
             isBindProperty: true,
@@ -328,7 +329,7 @@ class FilePickerWidget extends BaseWidget<
           {
             propertyName: "isDisabled",
             label: "Disable",
-            helpText: "Disables input to this widget",
+            helpText: "Disables input for this widget",
             controlType: "SWITCH",
             isJSConvertible: true,
             isBindProperty: true,
@@ -339,7 +340,7 @@ class FilePickerWidget extends BaseWidget<
             propertyName: "animateLoading",
             label: "Animate loading",
             controlType: "SWITCH",
-            helpText: "Controls the loading of the widget",
+            helpText: "Controls the widget's loading state",
             defaultValue: true,
             isJSConvertible: true,
             isBindProperty: true,
@@ -374,7 +375,7 @@ class FilePickerWidget extends BaseWidget<
         children: [
           {
             propertyName: "buttonColor",
-            helpText: "Changes the color of the button",
+            helpText: "Changes color of the button",
             label: "Button color",
             controlType: "COLOR_PICKER",
             isJSConvertible: true,
@@ -391,7 +392,7 @@ class FilePickerWidget extends BaseWidget<
             propertyName: "borderRadius",
             label: "Border radius",
             helpText:
-              "Rounds the corners of the icon button's outer border edge",
+              "Rounds the corners of the icon button's outer border",
             controlType: "BORDER_RADIUS_OPTIONS",
 
             isJSConvertible: true,
@@ -708,6 +709,11 @@ class FilePickerWidget extends BaseWidget<
       await this.reinitializeUppy(this.props);
     }
     this.clearFilesFromMemory(prevProps.selectedFiles);
+    const prevMaxNumFiles = prevProps.maxNumFiles ?? 0;
+    const currentMaxNumFiles = this.props.maxNumFiles ?? 0;
+    if (prevMaxNumFiles === 0 && currentMaxNumFiles > 0) {
+      this.setState({ errorMessage: null });
+    }
   }
 
   // Reclaim the memory used by blobs.
@@ -794,6 +800,11 @@ class FilePickerWidget extends BaseWidget<
           minHeight={this.props.minHeight}
           minWidth={this.props.minWidth}
           openModal={async () => {
+            if (this.props.maxNumFiles === 0) {
+              this.setState({ errorMessage: ERROR_MESSAGE });
+              return;
+            }
+            this.setState({ errorMessage: null });
             // If Uppy is still loading, show a spinner to indicate that handling the click
             // will take some time.
             //
@@ -813,6 +824,7 @@ class FilePickerWidget extends BaseWidget<
           }}
           shouldFitContent={this.isAutoLayoutMode}
           widgetId={this.props.widgetId}
+          errorMessage={this.state.errorMessage}
         />
 
         {this.state.isUppyModalOpen && (
@@ -827,6 +839,7 @@ interface FilePickerWidgetState extends WidgetState {
   areFilesLoading: boolean;
   isWaitingForUppyToLoad: boolean;
   isUppyModalOpen: boolean;
+  errorMessage: string | null;
 }
 
 interface FilePickerWidgetProps extends WidgetProps {
@@ -847,4 +860,4 @@ interface FilePickerWidgetProps extends WidgetProps {
 export type FilePickerWidgetV2Props = FilePickerWidgetProps;
 export type FilePickerWidgetV2State = FilePickerWidgetState;
 
-export default FilePickerWidget;
+export default FilePickerWidget;