From d1dfde7652eb4edc727c5582a2b29176529442de Mon Sep 17 00:00:00 2001
From: siinus <pearu@siinus.net>
Date: Thu, 3 Feb 2022 07:41:45 +0200
Subject: [PATCH] Add projector lamp indicators

---
 nginx/default  | 13 ++++++++-----
 www/index.html | 29 +++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+), 5 deletions(-)

diff --git a/nginx/default b/nginx/default
index d32b58a..faa90d7 100644
--- a/nginx/default
+++ b/nginx/default
@@ -91,12 +91,15 @@ server {
     location /projektor/ {
         proxy_pass http://127.0.0.1:6999/;
 
-            proxy_set_header X-Real-IP $remote_addr;
-            proxy_set_header X-Scheme $scheme;
-            proxy_http_version 1.1;
-            proxy_set_header Upgrade $http_upgrade;
-            proxy_set_header Connection "upgrade";
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Scheme $scheme;
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection "upgrade";
+    }
 
+    location /projector/ {
+        proxy_pass http://projektor.kontor.lapikud.ee/cgi-bin/;
     }
 }
 
diff --git a/www/index.html b/www/index.html
index 335c238..c9d425b 100644
--- a/www/index.html
+++ b/www/index.html
@@ -28,6 +28,10 @@
             color: black;
         }
 
+        .center {
+            text-align: center;
+        }
+
         .button-grid {
             display: grid;
             grid-auto-columns: 1fr;
@@ -136,6 +140,7 @@
     <button class="red" name="projektor" value="off">OFF</button>
     <button name="projektor" value="on">ON</button>
 </div>
+<p class="center"><span id="projector_lamp_hours"></span><span id="projector_lamp_remaining"></span></p>
 
 <h2 class="title">Sisendi juhtimine</h2>
 <div class="button-grid">
@@ -162,6 +167,30 @@
             send_mode(event.target.value);
         });
     }
+
+    function query_projector(request_string, closure) {
+        const xhr = new XMLHttpRequest();
+        xhr.open('GET', '/projector/pjctrl.cgi.elf?D=' + request_string, true)
+        xhr.overrideMimeType('text/plain');
+        xhr.onreadystatechange = function () {
+            if (xhr.readyState === 4) {
+                let data = JSON.parse(xhr.response.replace(',]', ']'));
+                if ((data[0] & 0x80) === 0) {
+                    closure(data);
+                }
+            }
+        };
+        xhr.send();
+    }
+
+    query_projector('%07%03%96%00%00%02%00%01H', function (data) {
+        const used = ((data[10] << 24) | (data[9] << 16) | (data[8] << 8) | data[7]) / 3600;
+        document.getElementById('projector_lamp_hours').innerText =
+            'Lambi läbisõit ' + Math.round(used) + 'h. ';
+    });
+    query_projector('%07%03%96%00%00%02%00%04H', function (data) {
+        document.getElementById('projector_lamp_remaining').innerText = 'Alles jäänud ' + data[7] + '%';
+    });
 </script>
 </body>
 </html>