Merge branch 'dev' of https://github.com/SillyLossy/TavernAI into dev

server.js

@@ -1593,6 +1593,63 @@ app.post("/dupecharacter", jsonParser, async function (request, response) {
     }
 });
 
+app.post("/exportchat", jsonParser, async function (request, response) {
+    if (!request.body.file || (!request.body.avatar_url && request.body.is_group === false)) {
+        return response.sendStatus(400);
+    }
+    const pathToFolder = request.body.is_group
+        ? directories.groupChats
+        : path.join(directories.chats, String(request.body.avatar_url).replace('.png', ''));
+    //let charname = String(sanitize(request.body.avatar_url)).replace('.png', '');
+    let filename = path.join(pathToFolder, request.body.file);
+    let exportfilename = path.join(pathToFolder, request.body.exportfilename)
+    if (!fs.existsSync(filename)) {
+        const errorMessage = {
+            message: `Could not find JSONL file to export. Source chat file: ${filename}. Intended destination file: ${exportfilename}.`
+        }
+        console.log(errorMessage.message);
+        return response.status(404).json(errorMessage);
+    }
+    if (fs.existsSync(exportfilename)) {
+        const errorMessage = {
+            message: `File by that name already exists. Export chat aborted.`
+        }
+        console.log(errorMessage.message);
+        return response.status(400).json(errorMessage);
+    }
+    try {
+        const readline = require('readline');
+        const fs = require('fs');
+        const readStream = fs.createReadStream(filename);
+        const writeStream = fs.createWriteStream(exportfilename);
+        const rl = readline.createInterface({
+            input: readStream,
+        });
+        rl.on('line', (line) => {
+            const data = JSON.parse(line);
+            if (data.mes) {
+                const name = data.name;
+                const message = data.mes.replace(/\r?\n/g, '\n');
+                writeStream.write(`${name}: ${message}\n\n`);
+            }
+        });
+        rl.on('close', () => {
+            writeStream.end();
+        });
+        //fs.promises.copyFile(filename, exportfilename)
+        const successMessage = {
+            message: `Chat exported as ${exportfilename}`
+        }
+        console.log(`Chat exported as ${exportfilename}`);
+        return response.status(200).json(successMessage);
+    }
+    catch (err) {
+        console.log("chat export failed.")
+        console.log(err);
+        return response.sendStatus(400);
+    }
+})
+
 app.post("/exportcharacter", jsonParser, async function (request, response) {
     if (!request.body.format || !request.body.avatar_url) {
         return response.sendStatus(400);