db-tabulator: rename js preprocess to postprocess for clarity

Author: siddharthvp

db-tabulator/autosql/landing.hbs

@@ -0,0 +1,16 @@
+<h2>AutoSQL</h2>
+<form action="/autosql/generate" method="POST">
+  <div>
+    <label for="query-english">
+      Enter your query in English to get the corresponding SQL:
+    </label>
+    <br>
+    <br>
+  </div>
+  <textarea id="query-english" name="prompt" rows="4" cols="100"></textarea>
+  <br>
+  <br>
+  <div>
+    <button type="submit" class="sd-button">Generate SQL</button>
+  </div>
+</form>

db-tabulator/autosql/result.hbs

@@ -0,0 +1,17 @@
+<div style="max-width: 800px">
+  <p>The generated SQL query is given below. Mistakes are possible. Use with caution.</p>
+  <br>
+
+  <pre>{{sql}}</pre>
+
+  <a href="https://quarry.wmcloud.org/" target="_blank">
+    <button>
+      Test it in Quarry
+    </button>
+  </a>
+
+  {{#if warnOnField}}
+    <br>
+    <p>NOTE: The above SQL may need adjustments for schema normalization, as the AI does not know that <code>{{warnOnField}}</code> field is no longer available. The field needs to be replaced with use of <code>link_target</code> table. See <a href="https://phabricator.wikimedia.org/T300222">phab:T300222</a>.</p>
+  {{/if}}
+</div>

db-tabulator/autosql/web-endpoint.ts

@@ -0,0 +1,46 @@
+import * as express from "express";
+import 'express-async-errors';
+import OpenAI from "openai";
+import {AuthManager, log} from "../../botbase";
+
+const router = express.Router();
+
+const client = new OpenAI({
+    apiKey: AuthManager.get('openai').key
+});
+
+router.get('/', async function (req, res) {
+    return res.render('db-tabulator/autosql/landing')
+});
+
+router.post('/generate', async function (req, res, next) {
+    if (!req.body.prompt) {
+        return res.status(400).render('webservice/views/oneline', {
+            text: 'Bad request: required parameter "prompt" missing'
+        })
+    }
+    const response = await client.chat.completions.create({
+        messages: [{
+            role: 'user',
+            content:
+                'Using MediaWiki\'s db schema outlined at https://www.mediawiki.org/wiki/Manual:Database_layout, write an SQL query to perform the below-mentioned. Respond only with the SQL query.\n\n' +
+                req.body.prompt
+        }],
+        model: 'gpt-3.5-turbo',
+    })
+    const sql = response.choices[0].message.content
+    const logEntry = {
+        prompt: req.query.prompt,
+        response: sql
+
+    }
+    return res.render('db-tabulator/autosql/result', {
+        sql: sql,
+        warnOnField:
+            sql.includes('pl_title') ? 'pl_title' :
+            sql.includes('tl_title') ? 'tl_title' :
+            null
+    })
+});
+
+export default router;