Automated answer routes and controller functions added

backend/controllers/automated-answer.js

+const { spawn } = require('child_process');
+const path = require('path');
+const AutomatedAnswer = require('../models/automatedAnswer');
+const Question = require('../models/question');
+
+/**
+ * @Method - POST
+ * @param {*} question_id - ID of the question to create automated answer for
+ * @returns Whether the automated answer request created or not
+ */
+exports.requestAutomatedAnswer = async (req, res, next) => {
+  const { question_id } = req.body;
+  try {
+    const question = await Question.findById(question_id);
+    if (!question) {
+      return res
+        .status(404)
+        .json({ message: 'No question found for this id, Please try again with another question' });
+    }
+    let autoAnswer;
+    autoAnswer = await AutomatedAnswer.findOne({ question: question_id });
+
+    if (autoAnswer) {
+      return res
+        .status(303)
+        .json({ message: 'Automated answer is already generated', automatedanswer: autoAnswer });
+    }
+
+    res.status(201).json({ message: 'Automated answer requested! Please wait for few seconds' });
+    autoAnswer = await AutomatedAnswer.create({ question: question._id, loading: true });
+    spawn('python', [
+      path.join(__dirname, '..', 'python', 'auto-answer', 'scrapper.py'),
+      question.title,
+      question.tags,
+      autoAnswer._id
+    ]);
+  } catch (err) {
+    next(err);
+  }
+};
+
+/**
+ *
+ * @Method - GET
+ * @qid {*} - question id
+ * @returns the automated answer for the question(qid) if there is one
+ */
+exports.getAutomatedAnswer = async (req, res, next) => {
+  const { qid } = req.params;
+  console.log('answer is here' + qid);
+  try {
+    const answer = await AutomatedAnswer.findOne({ question: qid });
+    if (!answer) {
+      return res.status(404).json({ message: 'No automated answer found for this question' });
+    }
+    return res.status(200).json({
+      message: 'Automated answer found',
+      automatedanswer: answer
+    });
+  } catch (err) {
+    next(err);
+  }
+};

backend/controllers/questions.js

 const Question = require('../models/question');
-const User = require('../models/user');
 const AutomatedAnswer = require('../models/automatedAnswer');
+const User = require('../models/user');
 const { body, validationResult } = require('express-validator');
 const { spawn } = require('child_process');
 const path = require('path');
@@ -35,12 +35,18 @@ exports.createQuestion = async (req, res, next) => {
     });
     res.status(201).json(question);
     const autoAnswer = await AutomatedAnswer.create({ question: question._id });
-    spawn('python', [
+    const pythonScript = spawn('python', [
       path.join(__dirname, '..', 'python', 'auto-answer', 'scrapper.py'),
       title,
       tags,
       autoAnswer._id
     ]);
+    pythonScript.stdout.on('data', (data) => {
+      console.log('DATA FROM PYTHON IS HERE' + data);
+    });
+    pythonScript.stdout.on('end', function () {
+      console.log('PYTHON SCRIPT HAS BEEN ENDED');
+    });
   } catch (error) {
     next(error);
   }
@@ -96,6 +102,7 @@ exports.removeQuestion = async (req, res, next) => {
   try {
     await req.question.remove();
     res.json({ message: 'Your question successfully deleted.' });
+    await AutomatedAnswer.findOneAndRemove({ question: req.question._id });
   } catch (error) {
     next(error);
   }
@@ -113,22 +120,6 @@ exports.loadComment = async (req, res, next, id) => {
   next();
 };
 
-exports.getAutomatedAnswer = async (req, res, next) => {
-  console.log('HERE');
-  try {
-    const { q } = req.params;
-    const answer = await AutomatedAnswer.findOne({ question: q });
-    if (answer) {
-      res.json(answer);
-    } else {
-      res.status(404).json({ msg: 'No automated answer found' });
-    }
-  } catch (error) {
-    next(error);
-  }
-};
-
-
 exports.questionValidate = [
   body('title')
     .exists()

backend/routes.js

@@ -14,8 +14,7 @@ const {
   listQuestions,
   listByTags,
   listByUser,
-  removeQuestion,
-  getAutomatedAnswer
+  removeQuestion
 } = require('./controllers/questions');
 const {
   loadAnswers,
@@ -31,6 +30,7 @@ const requireAuth = require('./middlewares/requireAuth');
 const questionAuth = require('./middlewares/questionAuth');
 const commentAuth = require('./middlewares/commentAuth');
 const answerAuth = require('./middlewares/answerAuth');
+const { requestAutomatedAnswer, getAutomatedAnswer } = require('./controllers/automated-answer');
 
 const router = require('express').Router();
 
@@ -51,7 +51,6 @@ router.get('/question', listQuestions);
 router.get('/questions/:tags', listByTags);
 router.get('/question/user/:username', listByUser);
 router.delete('/question/:question', [requireAuth, questionAuth], removeQuestion);
-router.get('/automatedanswer/:q', getAutomatedAnswer);
 
 //tags
 router.get('/tags/populertags', listPopulerTags);
@@ -74,6 +73,10 @@ router.post('/comment/:question/:answer?', [requireAuth, validate], createCommen
 router.delete('/comment/:question/:comment', [requireAuth, commentAuth], removeComment);
 router.delete('/comment/:question/:answer/:comment', [requireAuth, commentAuth], removeComment);
 
+//automate-answer
+router.post('/automatedanswer', requireAuth, requestAutomatedAnswer);
+router.get('/automatedanswer/:qid', getAutomatedAnswer);
+
 module.exports = (app) => {
   app.use('/api', router);