Merge pull request #115 from aspose-pdf-cloud/pdfapps-6884-added-use-cases-for-remove-metadata

PDFAPPS-6884:  added use cases for remove metadata

Author: kaferi

UsesCases/Metadatas/remove/deleteMetadata.js

@@ -0,0 +1,80 @@
+// 1. Load your Application Secret and Key from the JSON file or set credentials in another way
+// 2. Create an object to connect to the Pdf.Cloud API
+// 3. Upload your document file
+// 4. Create a new XmpMetadataProperty with Your key and null as value for delete XmpMetadataProperty
+// 5. Delete XMpMetadataProperty in the document using postXmpMetadata() function
+// 6. Perform some action after successful addition
+// All values of variables starting with "YOUR_****" should be replaced by real user values
+
+import credentials from "./credentials.json"  with { type: "json" };
+import fs from 'node:fs/promises';
+import path from 'node:path';
+import { PdfApi } from "asposepdfcloud";
+import { XmpMetadata } from "asposepdfcloud/src/models/xmpMetadata.js";
+import { XmpMetadataProperty } from "asposepdfcloud/src/models/xmpMetadataProperty.js";
+
+const configParams = {
+    LOCAL_FOLDER: "C:\\Samples\\",
+    PDF_DOCUMENT_NAME: "sample.pdf",
+    LOCAL_RESULT_DOCUMENT_NAME: "output_sample.pdf",
+};
+
+const pdfApi = new PdfApi(credentials.id, credentials.key);
+
+const pdfMetadatas = {
+    async uploadDocument() {
+        const pdfFilePath = path.join(configParams.LOCAL_FOLDER, configParams.PDF_DOCUMENT_NAME);
+        const pdfFileData = await fs.readFile(pdfFilePath);
+        await pdfApi.uploadFile(configParams.PDF_DOCUMENT_NAME, pdfFileData);
+    },
+    
+    async downloadResult() {
+        const changedPdfData = await pdfApi.downloadFile(configParams.PDF_DOCUMENT_NAME);
+        const filePath = path.join(configParams.LOCAL_FOLDER, configParams.LOCAL_RESULT_DOCUMENT_NAME);
+        await fs.writeFile(filePath, changedPdfData.body);
+        console.log("Downloaded: " + filePath);
+    },
+
+    async getMetadata () {
+        const responseMetadata = await pdfApi.getXmpMetadataJson(configParams.PDF_DOCUMENT_NAME);
+
+        if (responseMetadata.response.status == 200)
+        {
+            const props = responseMetadata.body.properties;
+            props.forEach((prop) =>{
+                console.log(prop.key);
+            });
+        }
+    },
+
+    async deleteMetadata () {
+        const prop = new XmpMetadataProperty();
+        prop.key = 'dc:creator';
+        prop.value = null;        // null value means delete property...
+        prop.namespaceUri = 'http://purl.org/dc/elements/1.1/';
+
+        const metadata = new XmpMetadata();
+        metadata.properties = [prop];
+        
+        const response = await pdfApi.postXmpMetadata(configParams.PDF_DOCUMENT_NAME, metadata);
+
+        if (response.body.code == 200) {
+            console.log("Dlete metadata '" + prop.key + "' successful!");
+            return true;
+        }
+    },
+}
+
+async function main() {
+    try {
+        await pdfMetadatas.uploadDocument();
+        await pdfMetadatas.getMetadata();
+        await pdfMetadatas.deleteMetadata();
+        await pdfMetadatas.getMetadata();
+        await pdfMetadatas.downloadResult();
+    } catch (error) {
+        console.error("Error:", error.message);
+    }
+}
+
+main();