From 45eb6ff8ebfa5fabfa18457b1b48c5e4c5b7878f Mon Sep 17 00:00:00 2001
From: s-ol <s+removethis@s-ol.nu>
Date: Fri, 7 Aug 2026 20:45:15 +0200
Subject: web: trace export button

---
 web/index.html |  4 ++++
 web/main.js    | 25 ++++++++++++++++++++++++-
 2 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/web/index.html b/web/index.html
index 8ddfad4..34215ff 100644
--- a/web/index.html
+++ b/web/index.html
@@ -33,6 +33,10 @@
           <label>controller</label>
           <label id="temps_controller">-</label>
         </div>
+        <div>
+          <label>export traces</label>
+          <button id="export" disabled>download csv</button>
+        </div>
         <h2>manual controls</h2>
         <div>
           <label for="heat">heat</label>
diff --git a/web/main.js b/web/main.js
index 6d29a50..e568bbc 100644
--- a/web/main.js
+++ b/web/main.js
@@ -102,7 +102,7 @@ plot.addPlot('temp3', { color: 'sienna' });
 plot.addPlot('tempavg', { color: 'rebeccapurple' });
 
 const elements = [
-  'connect', 'status', 'temps_chamber', 'temps_controller',
+  'connect', 'status', 'temps_chamber', 'temps_controller', 'export',
   'profile', 'start', 'read', 'write',
   'heat', 'heat_mode', 'cool', 'cool_mode',
   'profile_load', 'profile_save', 'profile_delete', 'profile_show', 'profile_edit', 'profile_clear', 'profile_stored', 
@@ -118,6 +118,7 @@ const updateUI = () => {
   el.start.disabled = !ready;
   el.read.disabled = !ready;
   el.write.disabled = !ready;
+  el.export.disabled = !plot.PLOTS.tempavg.data.length;
 
   el.profile_show.firstElementChild.firstElementChild.href.baseVal = plot.PLOTS.profile.visible ? '#i-eye' : '#i-no-eye';
   el.paste_show.firstElementChild.firstElementChild.href.baseVal = plot.PLOTS.paste.visible ? '#i-eye' : '#i-no-eye';
@@ -278,6 +279,28 @@ for (const [slider, checkbox] of pwms) {
   };
 }
 
+el.export.onclick = () => {
+  const tavg = plot.PLOTS.tempavg.data;
+  const columns = [
+    plot.PLOTS.temp1.data,
+    plot.PLOTS.temp2.data,
+    plot.PLOTS.tempavg.data,
+    plot.PLOTS.temp3.data,
+  ];
+
+  let csv = 'Seconds,Chamber Temp 1,Chamber Temp 2,Chamber Average,Controller Temp\n';
+  for (let i = 0; i < tavg.length; i++) {
+    const data = columns.map(col => col[i][1]).join(',');
+    csv += `${tavg[i][0]},${data}\n`;
+  }
+
+  const a = document.createElement('a');
+  a.href = 'data:text/csv;charset=utf-8,' + encodeURI(csv);
+  a.target = '_blank';
+  a.download = `temps_${new Date().toISOString}.csv`;
+  a.click();
+};
+
 el.start.onclick = () => {
   if (STATUS === 'idle') {
     STATUS = el.profile.value === '' ? 'manual' : 'running';
-- 
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