Ajax 用の呼出プログラム作成

broadcast/services/fetch_data.php

@@ -0,0 +1,66 @@
+<?php
+
+const LOG_PATH = '../log.txt';
+
+header ('Content-Type: application/json; charset=UTF-8');
+
+$log_data = [];
+
+$page = (int) (filter_input (INPUT_POST, 'p') ?? 1);
+$length = (int) (filter_input (INPUT_POST, 'max') ?? 20);
+$asc = (int) (filter_input (INPUT_POST, 'asc') ?? 0) !== 0;
+$keyword = trim (filter_input (INPUT_POST, 'q') ?? '');
+
+$date_start = filter_input (INPUT_POST, 'start');
+$date_end = filter_input (INPUT_POST, 'end');
+
+$f = fopen (LOG_PATH, 'r');
+
+if ($f !== false)
+  {
+    while (($dt = fgetcsv ($f, 0, "\t")) !== false)
+      {
+        $chat_info = json_decode ($dt[1]);
+
+        $log_data[] = ['dateTime'     => $dt[0],
+                       'chatIcon'     => $chat_info -> author -> imageUrl,
+                       'chatName'     => htmlspecialchars ($chat_info -> author -> name),
+                       'chatMessage'  => htmlspecialchars ($chat_info -> message),
+                       'answer'       => htmlspecialchars ($dt[2])];
+      }
+  }
+
+fclose ($f);
+
+unset ($f);
+
+if ($keyword !== '')
+  {
+    $log_data = array_filter ($log_data, fn ($row) => (
+        strpos (($row['chatName'] . "\n" . $row['chatMessage'] . "\n"
+                 . $row['answer']),
+                $keyword)
+        !== false));
+  }
+
+if ($date_start)
+  {
+    $log_data = array_filter ($log_data, fn ($row) => (
+        substr ($row['dateTime'], 0, 10) >= $date_start));
+  }
+
+if ($date_end)
+  {
+    $log_data = array_filter ($log_data, fn ($row) => (
+        substr ($row['dateTime'], 0, 10) <= $date_end));
+  }
+
+$pages_max = (int) ((count ($log_data) - 1) / $length) + 1;
+
+if (!($asc))
+  $log_data = array_reverse ($log_data);
+
+$log_data = array_slice ($log_data, ($page - 1) * $length, $length, true);
+
+echo json_encode ($log_data);
+