first commit

wp-content/plugins/mailchimp-for-wp/includes/class-debug-log-reader.php

@@ -0,0 +1,160 @@
+<?php
+
+/**
+ * Class MC4WP_Debug_Log_Reader
+ */
+class MC4WP_Debug_Log_Reader
+{
+    /**
+     * @var resource|null
+     */
+    private $handle;
+
+    /**
+     * @var string
+     */
+    private static $regex = '/^(\[[\d \-\:]+\]) (\w+\:) (.*)$/S';
+
+    /**
+     * @var string
+     */
+    private static $html_template = '<span class="time">$1</span> <span class="level">$2</span> <span class="message">$3</span>';
+
+    /**
+     * @var string The log file location.
+     */
+    private $file;
+
+    /**
+     * MC4WP_Debug_Log_Reader constructor.
+     *
+     * @param $file
+     */
+    public function __construct($file)
+    {
+        $this->file = $file;
+    }
+
+    /**
+     * @return string
+     */
+    public function all()
+    {
+        return file_get_contents($this->file);
+    }
+
+    /**
+     * Sets file pointer to $n of lines from the end of file.
+     *
+     * @param int $n
+     */
+    private function seek_line_from_end($n)
+    {
+        $line_count = 0;
+
+        // get line count
+        while (! feof($this->handle)) {
+            fgets($this->handle);
+            ++$line_count;
+        }
+
+        // rewind to beginning
+        rewind($this->handle);
+
+        // calculate target
+        $target  = $line_count - $n;
+        $target  = $target > 1 ? $target : 1; // always skip first line because oh PHP header
+        $current = 0;
+
+        // keep reading until we're at target
+        while ($current < $target) {
+            fgets($this->handle);
+            ++$current;
+        }
+    }
+
+    /**
+     * @return string|null
+     */
+    public function read()
+    {
+
+        // open file if not yet opened
+        if (! is_resource($this->handle)) {
+            // doesn't exist?
+            if (! file_exists($this->file)) {
+                return null;
+            }
+
+            $this->handle = @fopen($this->file, 'r');
+
+            // unable to read?
+            if (! is_resource($this->handle)) {
+                return null;
+            }
+
+            // set pointer to 1000 files from EOF
+            $this->seek_line_from_end(1000);
+        }
+
+        // stop reading once we're at the end
+        if (feof($this->handle)) {
+            fclose($this->handle);
+            $this->handle = null;
+            return null;
+        }
+
+        // read line, up to 8kb
+        $text = fgets($this->handle);
+
+        // strip tags & trim
+        $text = strip_tags($text);
+        $text = trim($text);
+
+        return $text;
+    }
+
+    /**
+     * @return string
+     */
+    public function read_as_html()
+    {
+        $line = $this->read();
+
+        // null means end of file
+        if (is_null($line)) {
+            return null;
+        }
+
+        // empty string means empty line, but not yet eof
+        if (empty($line)) {
+            return '';
+        }
+
+        $line = preg_replace(self::$regex, self::$html_template, $line);
+        return $line;
+    }
+
+    /**
+     * Reads X number of lines.
+     *
+     * If $start is negative, reads from end of log file.
+     *
+     * @param int $start
+     * @param int $number
+     * @return string
+     */
+    public function lines($start, $number)
+    {
+        $handle = fopen($start, 'r');
+        $lines  = '';
+
+        $current_line = 0;
+        while ($current_line < $number) {
+            $lines .= fgets($handle);
+        }
+
+        fclose($handle);
+        return $lines;
+    }
+}