"open" action will save note to temp directory to try it then open with native application, #1304

src/routes/api/files.js

@@ -4,6 +4,8 @@ const protectedSessionService = require('../../services/protected_session');
 const repository = require('../../services/repository');
 const utils = require('../../services/utils');
 const noteRevisionService = require('../../services/note_revisions');
+const tmp = require('tmp');
+const fs = require('fs');
 
 function updateFile(req) {
     const {noteId} = req.params;
@@ -31,6 +33,12 @@ function updateFile(req) {
     };
 }
 
+function getFilename(note) {
+    // (one) reason we're not using the originFileName (available as label) is that it's not
+    // available for older note revisions and thus would be inconsistent
+    return utils.formatDownloadTitle(note.title, note.type, note.mime);
+}
+
 function downloadNoteFile(noteId, res, contentDisposition = true) {
     const note = repository.getNote(noteId);
 
@@ -43,9 +51,7 @@ function downloadNoteFile(noteId, res, contentDisposition = true) {
     }
 
     if (contentDisposition) {
-        // (one) reason we're not using the originFileName (available as label) is that it's not
-        // available for older note revisions and thus would be inconsistent
-        const filename = utils.formatDownloadTitle(note.title, note.type, note.mime);
+        const filename = getFilename(note);
 
         res.setHeader('Content-Disposition', utils.getContentDisposition(filename));
     }
@@ -67,9 +73,29 @@ function openFile(req, res) {
     return downloadNoteFile(noteId, res, false);
 }
 
+function saveToTmpDir(req) {
+    const noteId = req.params.noteId;
+
+    const note = repository.getNote(noteId);
+
+    if (!note) {
+        return [404,`Note ${noteId} doesn't exist.`];
+    }
+
+    const tmpObj = tmp.fileSync({postfix: getFilename(note)});
+
+    fs.writeSync(tmpObj.fd, note.getContent());
+    fs.closeSync(tmpObj.fd);
+
+    return {
+        tmpFilePath: tmpObj.name
+    };
+}
+
 module.exports = {
     updateFile,
     openFile,
     downloadFile,
-    downloadNoteFile
+    downloadNoteFile,
+    saveToTmpDir
 };