Adding LibreOffice conversion support (WIP)

client-tauri/src/utils/libre-office-utils.tsx

@@ -0,0 +1,46 @@
+
+import { readBinaryFile, writeBinaryFile, removeDir, BaseDirectory } from '@tauri-apps/api/fs';
+import { PdfFile, fromUint8Array } from '@stirling-pdf/shared-operations/wrappers/PdfFile'
+import { runShell } from './tauri-wrapper';
+
+export async function fileToPdf(byteArray: Uint8Array, filename: string): Promise<PdfFile> {
+    const randUuid = crypto.randomUUID();
+    const tempDir = "StirlingPDF/"+randUuid;
+    const srcFile = tempDir+"/"+filename;
+
+    await writeBinaryFile(srcFile, byteArray);
+    await writeBinaryFile(srcFile, new Uint8Array([]), { dir: BaseDirectory.Temp });
+
+    const messageList: string[] = [];
+    await runShell("libreoffice-convert", ["--headless","--convert-to","pdf",srcFile,"--outdir",tempDir], (message, stream) => {
+        if (stream === "stdout") {
+            messageList.push(message);
+        }
+        console.debug(`${stream}, ${randUuid}: ${message}`);
+    });
+    const lastMessage = messageList[messageList.length-1]
+    const outputFilePath = lastMessage.split(" -> ")[1].split(".pdf")[0]+".pdf";
+    const outputFilePathSplit = outputFilePath.toString().split("[\\/]")
+    const outputFileName = outputFilePathSplit[outputFilePathSplit.length-1];
+    const outputBytes = await readBinaryFile(outputFilePath);
+
+    await removeDir(tempDir);
+
+    return fromUint8Array(outputBytes, outputFileName);
+}
+
+export async function isLibreOfficeInstalled() {
+    const messageList: string[] = [];
+    try {
+        await runShell("libreoffice-version", ["--version"], (message, stream) => {
+            if (stream === "stdout") {
+                messageList.push(message);
+            }
+        });
+    } catch (error) {
+        return false;
+    }
+    console.log("messageList", messageList)
+    const result = messageList[0].match("LibreOffice ([0-9]+\.){4}.*");
+    return result ? true : false;
+}