From 56145565dfffb26ef66b99db28b322872a0df60f Mon Sep 17 00:00:00 2001
From: Paul Bienkowski <pb@opatut.de>
Date: Sat, 28 Nov 2020 19:23:40 +0100
Subject: [PATCH] wip: script to reconstruct body field from track data (for
 #20)

---
 scripts/reconstruct-obsver1-body.js | 62 +++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 scripts/reconstruct-obsver1-body.js

diff --git a/scripts/reconstruct-obsver1-body.js b/scripts/reconstruct-obsver1-body.js
new file mode 100644
index 0000000..da97f02
--- /dev/null
+++ b/scripts/reconstruct-obsver1-body.js
@@ -0,0 +1,62 @@
+const mongoose = require('mongoose');
+const Track = require('../src/models/Track');
+
+const { replaceDollarNewlinesHack, detectFormat, buildObsver1 } = require('../src/logic/tracks');
+
+// connect to database
+require('../src/db');
+
+function shouldRebuildBody(track) {
+  if (!track.trackData || !track.trackData.points.length) {
+    return false;
+  }
+
+  if (!track.body) {
+    return true;
+  }
+  const body = track.body.trim();
+  if (!body) {
+    return true;
+  }
+
+  const actualBody = replaceDollarNewlinesHack(body).trim();
+  if (body !== actualBody) {
+    return true;
+  }
+
+  const lineCount = (actualBody.match(/\n/g) || []).length + 1;
+
+  const format = detectFormat(body);
+  if (format === 'invalid') {
+    return true;
+  }
+
+  // never reconstruct body of version 2
+  if (format > 1) {
+    return false;
+  }
+
+  // not enough data in the file
+  if (lineCount < track.trackData.points.length + 1) {
+    return true;
+  }
+
+  return false;
+}
+
+async function main() {
+  const query = Track.find().populate('trackData');
+  for await (const track of query) {
+    const rebuild = shouldRebuildBody(track);
+    if (rebuild) {
+      console.log('Rebuilding', track.title, 'with', track.trackData.points.length, 'data points.');
+
+      track.body = buildObsver1(track.trackData.points);
+      await track.save();
+    }
+  }
+}
+
+main()
+  .catch((err) => console.error(err))
+  .finally(() => mongoose.connection.close());