Initial commit

OLD/cron/refresh_truckdump_cache.php

@@ -0,0 +1,152 @@
+<?php
+$delay = 15; // time in seconds
+header("Refresh: $delay; URL=" . $_SERVER['PHP_SELF']);
+
+/**
+ * Refresh truck dump stats cache.
+ * 
+ * Run via cron every 60 seconds:
+ *   * * * * * php /path/to/refresh_truckdump_cache.php
+ * 
+ * Or call from truckdump.php with stale-check.
+ */
+
+// Ensure PHP uses the same timezone as MySQL/local server
+date_default_timezone_set('America/Chicago');
+
+$con = mysqli_connect('192.168.0.10', 'corey', '41945549', 'controls');
+
+if (!$con) {
+    error_log('refresh_truckdump_cache: DB connection failed');
+    exit(1);
+}
+
+/**
+ * Format seconds as HH:MM:SS
+ */
+function formatDuration($seconds)
+{
+    if ($seconds <= 0) {
+        return '00:00:00';
+    }
+    $hours = floor($seconds / 3600);
+    $minutes = floor(($seconds % 3600) / 60);
+    $secs = $seconds % 60;
+    return sprintf('%02d:%02d:%02d', $hours, $minutes, $secs);
+}
+
+/**
+ * Get dump timestamps for a given counter column.
+ * Finds when the counter value changed (i.e., when a dump occurred).
+ * Returns array of up to 10 timestamps (most recent first).
+ */
+function getDumpTimestamps($con, $counterColumn)
+{
+    // Find the first occurrence of each counter value (when it incremented)
+    // by getting the MIN(DATE) for each distinct counter value
+    $query = "
+        SELECT MIN(DATE) AS dump_time
+        FROM plc
+        GROUP BY {$counterColumn}
+        ORDER BY {$counterColumn} DESC
+        LIMIT 10
+    ";
+    $result = mysqli_query($con, $query);
+    
+    if (!$result) {
+        return [];
+    }
+    
+    $timestamps = [];
+    while ($row = mysqli_fetch_assoc($result)) {
+        $ts = strtotime($row['dump_time']);
+        if ($ts) {
+            $timestamps[] = $ts;
+        }
+    }
+    return $timestamps;
+}
+
+/**
+ * Calculate stats for a dump location.
+ */
+function calculateDumpStats($con, $counterColumn)
+{
+    $timestamps = getDumpTimestamps($con, $counterColumn);
+    $now = time();
+    
+    $sinceLast = '00:00:00';
+    $betweenDumps = '00:00:00';
+    $avg10 = '00:00:00';
+    
+    if (count($timestamps) >= 1) {
+        // Time since the most recent dump
+        $sinceLast = formatDuration($now - $timestamps[0]);
+    }
+    
+    if (count($timestamps) >= 2) {
+        // Time between the last two dumps
+        $betweenDumps = formatDuration($timestamps[0] - $timestamps[1]);
+    }
+    
+    if (count($timestamps) >= 10) {
+        // Average time between 10 dumps = (first - tenth) / 9 intervals
+        $avgSeconds = ($timestamps[0] - $timestamps[9]) / 9;
+        $avg10 = formatDuration((int) $avgSeconds);
+    }
+    
+    return [
+        'since_last'    => $sinceLast,
+        'between_dumps' => $betweenDumps,
+        'avg_10'        => $avg10,
+    ];
+}
+
+// Calculate all stats
+$east = calculateDumpStats($con, 'totnorth');
+$west1 = calculateDumpStats($con, 'totsouth');
+$west2 = calculateDumpStats($con, 'totwest2');
+
+// Update cache table
+$sql = "
+    UPDATE truckdump_stats_cache SET
+        east_since_last     = ?,
+        east_between_dumps  = ?,
+        east_avg_10         = ?,
+        west1_since_last    = ?,
+        west1_between_dumps = ?,
+        west1_avg_10        = ?,
+        west2_since_last    = ?,
+        west2_between_dumps = ?,
+        west2_avg_10        = ?,
+        updated_at          = NOW()
+    WHERE id = 1
+";
+
+$stmt = mysqli_prepare($con, $sql);
+mysqli_stmt_bind_param(
+    $stmt,
+    'sssssssss',
+    $east['since_last'],
+    $east['between_dumps'],
+    $east['avg_10'],
+    $west1['since_last'],
+    $west1['between_dumps'],
+    $west1['avg_10'],
+    $west2['since_last'],
+    $west2['between_dumps'],
+    $west2['avg_10']
+);
+
+$success = mysqli_stmt_execute($stmt);
+
+mysqli_stmt_close($stmt);
+mysqli_close($con);
+
+if ($success) {
+    echo "Cache refreshed at " . date('Y-m-d H:i:s') . "\n";
+    exit(0);
+} else {
+    error_log('refresh_truckdump_cache: Update failed');
+    exit(1);
+}