From a3f2fe943ca18603ab170eeffb560d1122521e14 Mon Sep 17 00:00:00 2001
From: ehpersonal38 <103586016+ehpersonal38@users.noreply.github.com>
Date: Sat, 16 Apr 2022 10:27:04 -0400
Subject: [PATCH] JS refresh of most recent detection

Hello!

I've gone ahead and implemented some JS into overview.php that will automatically refresh the most recent audio detection, if there is a newer one. This means you don't have to manually refresh overview anymore.

Open to feedback/suggestions!
-Ethan
---
 scripts/overview.php          | 92 +++++++++++++++++++++++++++++------
 scripts/todays_detections.php |  1 -
 2 files changed, 78 insertions(+), 15 deletions(-)
diff --git a/scripts/overview.php b/scripts/overview.php
index c622faa..2a14563 100644
--- a/scripts/overview.php
+++ b/scripts/overview.php
@@ -1,5 +1,5 @@
 <?php
-header("refresh: 300;");
+//header("refresh: 300;");
 $myDate = date('Y-m-d');
 $chart = "Combo-$myDate.png";
 
@@ -60,6 +60,49 @@ if($statement6 == False) {
 }
 $result6 = $statement6->execute();
 $totalspeciestally = $result6->fetchArray(SQLITE3_ASSOC);
+
+
+if(isset($_GET['ajax_detections']) && $_GET['ajax_detections'] == "true" && isset($_GET['previous_detection_identifier'])) {
+  if($_GET['previous_detection_identifier'] != $filename || $_GET['previous_detection_identifier'] == "undefined") {
+    // check to make sure the image actually exists, sometimes it takes a minute to be created
+    $headers = @get_headers("http://".$_SERVER['HTTP_HOST'].$filename.".png");
+    if(strpos($headers[0],'200')) {
+    ?>
+      <style>
+      .fade-in {
+        opacity: 1;
+        animation-name: fadeInOpacity;
+        animation-iteration-count: 1;
+        animation-timing-function: ease-in;
+        animation-duration: 1s;
+      }
+
+      @keyframes fadeInOpacity {
+        0% {
+          opacity: 0;
+        }
+        100% {
+          opacity: 1;
+        }
+      }
+      </style>
+      <table class="<?php echo ($_GET['previous_detection_identifier'] == 'undefined') ? '' : 'fade-in';  ?>">
+        <h3>Most Recent Detection: <span style="font-weight: normal;"><?php echo $mostrecent['Date']." ".$mostrecent['Time'];?></span></h3>
+        <tr>
+          <td>
+          <form action="" method="GET">
+              <input type="hidden" name="view" value="Species Stats">
+              <button type="submit" name="species" value="<?php echo $mostrecent['Com_Name'];?>"><?php echo $mostrecent['Com_Name'];?>: </button>
+              <a href="https://wikipedia.org/wiki/<?php echo $sciname;?>" target="_blank"/><i><?php echo $mostrecent['Sci_Name'];?></i></a>
+              <br>Confidence: <?php echo $mostrecent['Confidence'];?><br>
+              <video height="611px" onplay='setLiveStreamVolume(0)' onended='setLiveStreamVolume(1)' onpause='setLiveStreamVolume(1)' controls poster="<?php echo $filename.".png";?>" preload="none" title="<?php echo $filename;?>"><source src="<?php echo $filename;?>"></video></td>
+          </form>
+        </tr>
+      </table> <?php
+    }
+  }
+  die();
+}
 ?>
 <head>
   <meta charset="UTF-8">
@@ -113,20 +156,41 @@ if (file_exists('./Charts/'.$chart)) {
 }
 ?>
 </div>
-<table>
-  <h3>Most Recent Detection: <span style="font-weight: normal;"><?php echo $mostrecent['Date']." ".$mostrecent['Time'];?></span></h3>
-  <tr>
-    <td>
-    <form action="" method="GET">
-        <input type="hidden" name="view" value="Species Stats">
-        <button type="submit" name="species" value="<?php echo $mostrecent['Com_Name'];?>"><?php echo $mostrecent['Com_Name'];?>: </button>
-        <a href="https://wikipedia.org/wiki/<?php echo $sciname;?>" target="_blank"/><i><?php echo $mostrecent['Sci_Name'];?></i></a>
-        <br>Confidence: <?php echo $mostrecent['Confidence'];?><br>
-        <video onplay='setLiveStreamVolume(0)' onended='setLiveStreamVolume(1)' onpause='setLiveStreamVolume(1)' controls poster="<?php echo $filename.".png";?>" preload="none" title="<?php echo $filename;?>"><source src="<?php echo $filename;?>"></video></td>
-    </form>
-  </tr>
-</table>
+
+<div id="most_recent_detection"></div>
+
 <h3>Currently Analyzing</h3>
 <img src='/spectrogram.png?nocache=<?php echo time();?>' >
 </div>
 </div>
+
+<script>
+// we're passing a unique ID of the currently displayed detection to our script, which checks the database to see if the newest detection entry is that ID, or not. If the IDs don't match, it must mean we have a new detection and it's loaded onto the page
+function loadDetectionIfNewExists(previous_detection_identifier=undefined) {
+  const xhttp = new XMLHttpRequest();
+  xhttp.onload = function() {
+    // if there's a new detection that needs to be updated to the page
+    if(this.responseText.length > 0) {
+      document.getElementById("most_recent_detection").innerHTML = this.responseText;
+    }
+  }
+  xhttp.open("GET", "overview.php?ajax_detections=true&previous_detection_identifier="+previous_detection_identifier, true);
+  xhttp.send();
+}
+window.setInterval(function(){
+  var videoelement = document.getElementsByTagName("video")[0];
+  if(typeof videoelement !== "undefined") {
+    // don't refresh the detection if the user is playing the previous one's audio, wait until they're finished
+    if(!!(videoelement.currentTime > 0 && !videoelement.paused && !videoelement.ended && videoelement.readyState > 2) == false) {
+      loadDetectionIfNewExists(videoelement.title);
+    }
+  } else{
+    // image or audio didn't load for some reason, force a refresh in 5 seconds
+    loadDetectionIfNewExists();
+  }
+}, 5*1000);
+window.addEventListener("load", function(){
+  loadDetectionIfNewExists();
+});
+</script>
+
diff --git a/scripts/todays_detections.php b/scripts/todays_detections.php
index e50a2e7..f9b4319 100644
--- a/scripts/todays_detections.php
+++ b/scripts/todays_detections.php
@@ -143,7 +143,6 @@ if(isset($_GET['ajax_detections']) && $_GET['ajax_detections'] == "true" && isse
 
 <script>
 function loadDetections(detections_limit, element=undefined) {
-  console.log(element);
   const xhttp = new XMLHttpRequest();
   xhttp.onload = function() {
     if(typeof element !== "undefined")
