V2 remove cert (#4239)

# Description of Changes

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Please provide a summary of the changes, including:

- What was changed
- Why the change was made
- Any challenges encountered

Closes #(issue_number)
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---

## Checklist

### General

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [ ] I have performed a self-review of my own code
- [ ] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md#6-testing)
for more details.

frontend/public/locales/en-GB/translation.json

@@ -1268,7 +1268,18 @@
     "title": "Remove Certificate Signature",
     "header": "Remove the digital certificate from the PDF",
     "selectPDF": "Select a PDF file:",
-    "submit": "Remove Signature"
+    "submit": "Remove Signature",
+    "description": "This tool will remove digital certificate signatures from your PDF document.",
+    "filenamePrefix": "unsigned",
+    "files": {
+      "placeholder": "Select a PDF file in the main view to get started"
+    },
+    "error": {
+      "failed": "An error occurred whilst removing certificate signatures."
+    },
+    "results": {
+      "title": "Certificate Removal Results"
+    }
   },
   "pageLayout": {
     "tags": "merge,composite,single-view,organize",

frontend/public/locales/en-US/translation.json

@@ -995,7 +995,18 @@
     "title": "Remove Certificate Signature",
     "header": "Remove the digital certificate from the PDF",
     "selectPDF": "Select a PDF file:",
-    "submit": "Remove Signature"
+    "submit": "Remove Signature",
+    "description": "This tool will remove digital certificate signatures from your PDF document.",
+    "filenamePrefix": "unsigned",
+    "files": {
+      "placeholder": "Select a PDF file in the main view to get started"
+    },
+    "error": {
+      "failed": "An error occurred while removing certificate signatures."
+    },
+    "results": {
+      "title": "Certificate Removal Results"
+    }
   },
   "pageLayout": {
     "tags": "merge,composite,single-view,organize",

frontend/src/components/tools/removeCertificateSign/RemoveCertificateSignSettings.tsx

@@ -0,0 +1,27 @@
+import React from 'react';
+import { useTranslation } from 'react-i18next';
+import { RemoveCertificateSignParameters } from '../../../hooks/tools/removeCertificateSign/useRemoveCertificateSignParameters';
+
+interface RemoveCertificateSignSettingsProps {
+  parameters: RemoveCertificateSignParameters;
+  onParameterChange: <K extends keyof RemoveCertificateSignParameters>(parameter: K, value: RemoveCertificateSignParameters[K]) => void;
+  disabled?: boolean;
+}
+
+const RemoveCertificateSignSettings: React.FC<RemoveCertificateSignSettingsProps> = ({ 
+  parameters, 
+  onParameterChange, // Unused - kept for interface consistency and future extensibility
+  disabled = false 
+}) => {
+  const { t } = useTranslation();
+
+  return (
+    <div className="remove-certificate-sign-settings">
+      <p className="text-muted">
+        {t('removeCertSign.description', 'This tool will remove digital certificate signatures from your PDF document.')}
+      </p>
+    </div>
+  );
+};
+
+export default RemoveCertificateSignSettings;

frontend/src/data/useTranslatedToolRegistry.tsx

@@ -11,6 +11,7 @@ import RemovePassword from '../tools/RemovePassword';
 import { SubcategoryId, ToolCategory, ToolRegistry } from './toolsTaxonomy';
 import AddWatermark from '../tools/AddWatermark';
 import Repair from '../tools/Repair';
+import RemoveCertificateSign from '../tools/RemoveCertificateSign';
 
 // Hook to get the translated tool registry
 export function useFlatToolRegistry(): ToolRegistry {
@@ -323,11 +324,13 @@ export function useFlatToolRegistry(): ToolRegistry {
     "remove-certificate-sign": {
         icon: <span className="material-symbols-rounded">remove_moderator</span>,
         name: t("home.removeCertSign.title", "Remove Certificate Signatures"),
-        component: null,
+        component: RemoveCertificateSign,
         view: "security",
         description: t("home.removeCertSign.desc", "Remove digital signatures from PDF documents"),
         category: ToolCategory.STANDARD_TOOLS,
-        subcategory: SubcategoryId.REMOVAL
+        subcategory: SubcategoryId.REMOVAL,
+        maxFiles: -1,
+        endpoints: ["remove-certificate-sign"]
     },
 
 

frontend/src/hooks/tools/removeCertificateSign/useRemoveCertificateSignOperation.ts

@@ -0,0 +1,23 @@
+import { useTranslation } from 'react-i18next';
+import { useToolOperation } from '../shared/useToolOperation';
+import { createStandardErrorHandler } from '../../../utils/toolErrorHandler';
+import { RemoveCertificateSignParameters } from './useRemoveCertificateSignParameters';
+
+export const useRemoveCertificateSignOperation = () => {
+  const { t } = useTranslation();
+
+  const buildFormData = (parameters: RemoveCertificateSignParameters, file: File): FormData => {
+    const formData = new FormData();
+    formData.append("fileInput", file);
+    return formData;
+  };
+
+  return useToolOperation<RemoveCertificateSignParameters>({
+    operationType: 'removeCertificateSign',
+    endpoint: '/api/v1/security/remove-cert-sign',
+    buildFormData,
+    filePrefix: t('removeCertSign.filenamePrefix', 'unsigned') + '_',
+    multiFileEndpoint: false,
+    getErrorMessage: createStandardErrorHandler(t('removeCertSign.error.failed', 'An error occurred while removing certificate signatures.'))
+  });
+};

frontend/src/hooks/tools/removeCertificateSign/useRemoveCertificateSignParameters.ts

@@ -0,0 +1,19 @@
+import { BaseParameters } from '../../../types/parameters';
+import { useBaseParameters, BaseParametersHook } from '../shared/useBaseParameters';
+
+export interface RemoveCertificateSignParameters extends BaseParameters {
+  // Extends BaseParameters - ready for future parameter additions if needed
+}
+
+export const defaultParameters: RemoveCertificateSignParameters = {
+  // No parameters needed
+};
+
+export type RemoveCertificateSignParametersHook = BaseParametersHook<RemoveCertificateSignParameters>;
+
+export const useRemoveCertificateSignParameters = (): RemoveCertificateSignParametersHook => {
+  return useBaseParameters({
+    defaultParameters,
+    endpointName: 'remove-certificate-sign',
+  });
+};

frontend/src/tools/RemoveCertificateSign.tsx

@@ -0,0 +1,80 @@
+import React, { useEffect } from "react";
+import { useTranslation } from "react-i18next";
+import { useEndpointEnabled } from "../hooks/useEndpointConfig";
+import { useFileContext } from "../contexts/FileContext";
+import { useToolFileSelection } from "../contexts/FileSelectionContext";
+
+import { createToolFlow } from "../components/tools/shared/createToolFlow";
+
+import { useRemoveCertificateSignParameters } from "../hooks/tools/removeCertificateSign/useRemoveCertificateSignParameters";
+import { useRemoveCertificateSignOperation } from "../hooks/tools/removeCertificateSign/useRemoveCertificateSignOperation";
+import { BaseToolProps } from "../types/tool";
+
+const RemoveCertificateSign = ({ onPreviewFile, onComplete, onError }: BaseToolProps) => {
+  const { t } = useTranslation();
+  const { setCurrentMode } = useFileContext();
+  const { selectedFiles } = useToolFileSelection();
+
+  const removeCertificateSignParams = useRemoveCertificateSignParameters();
+  const removeCertificateSignOperation = useRemoveCertificateSignOperation();
+
+  // Endpoint validation
+  const { enabled: endpointEnabled, loading: endpointLoading } = useEndpointEnabled(removeCertificateSignParams.getEndpointName());
+
+  useEffect(() => {
+    removeCertificateSignOperation.resetResults();
+    onPreviewFile?.(null);
+  }, [removeCertificateSignParams.parameters]);
+
+  const handleRemoveSignature = async () => {
+    try {
+      await removeCertificateSignOperation.executeOperation(removeCertificateSignParams.parameters, selectedFiles);
+      if (removeCertificateSignOperation.files && onComplete) {
+        onComplete(removeCertificateSignOperation.files);
+      }
+    } catch (error) {
+      if (onError) {
+        onError(error instanceof Error ? error.message : t("removeCertSign.error.failed", "Remove certificate signature operation failed"));
+      }
+    }
+  };
+
+  const handleThumbnailClick = (file: File) => {
+    onPreviewFile?.(file);
+    sessionStorage.setItem("previousMode", "removeCertificateSign");
+    setCurrentMode("viewer");
+  };
+
+  const handleSettingsReset = () => {
+    removeCertificateSignOperation.resetResults();
+    onPreviewFile?.(null);
+    setCurrentMode("removeCertificateSign");
+  };
+
+  const hasFiles = selectedFiles.length > 0;
+  const hasResults = removeCertificateSignOperation.files.length > 0 || removeCertificateSignOperation.downloadUrl !== null;
+
+  return createToolFlow({
+    files: {
+      selectedFiles,
+      isCollapsed: hasFiles || hasResults,
+      placeholder: t("removeCertSign.files.placeholder", "Select a PDF file in the main view to get started"),
+    },
+    steps: [],
+    executeButton: {
+      text: t("removeCertSign.submit", "Remove Signature"),
+      isVisible: !hasResults,
+      loadingText: t("loading"),
+      onClick: handleRemoveSignature,
+      disabled: !removeCertificateSignParams.validateParameters() || !hasFiles || !endpointEnabled,
+    },
+    review: {
+      isVisible: hasResults,
+      operation: removeCertificateSignOperation,
+      title: t("removeCertSign.results.title", "Certificate Removal Results"),
+      onFileClick: handleThumbnailClick,
+    },
+  });
+};
+
+export default RemoveCertificateSign;

frontend/src/types/fileContext.ts

@@ -19,7 +19,8 @@ export type ModeType =
   | 'changePermissions'
   | 'watermark'
   | 'removePassword'
-  | 'repair';
+  | 'repair'
+  | 'removeCertificateSign';
 
 export type ViewType = 'viewer' | 'pageEditor' | 'fileEditor';