Extract render code into dedicated class

Signed-off-by: Florian Pritz <bluewind@xinu.at>

1 files changed, 166 insertions, 0 deletions

diff --git a/application/service/renderer.php b/application/service/renderer.php
new file mode 100644
index 000000000..c6e58165b
--- /dev/null
+++ b/application/service/renderer.php
@@ -0,0 +1,166 @@
+<?php
+/*
+ * Copyright 2017 Florian "Bluewind" Pritz <bluewind@server-speed.net>
+ *
+ * Licensed under AGPLv3
+ * (see COPYING for full license text)
+ *
+ */
+
+namespace service;
+class renderer {
+
+
+	/**
+	 * @param mixed $mfile
+	 */
+	public function __construct($mfile, $data)
+	{
+        $this->mfile = $mfile;
+        $this->data = $data;
+	}
+
+	private function colorify($output_cache, $file, $lexer, $anchor_id = false)
+	{
+		$output = "";
+		$lines_to_remove = 0;
+
+		$output .= '<div class="code content table">'."\n";
+		$output .= '<div class="highlight"><code class="code-container">'."\n";
+
+		$content = file_get_contents($file);
+
+		$linecount = count(explode("\n", $content));
+		if ($lexer === "json" && $linecount === 1) {
+			$decoded_json = json_decode($content);
+			if ($decoded_json !== null && $decoded_json !== false) {
+				$pretty_json = json_encode($decoded_json, JSON_PRETTY_PRINT);
+				if ($pretty_json !== false) {
+					$content = $pretty_json;
+					$output_cache->render_now(
+						array(
+							"error_type" => "alert-info",
+							"error_message" => "<p>The file below has been reformated for readability. It may differ from the original.</p>"
+						),
+						"file/fragments/alert-wide"
+					);
+				}
+			}
+		}
+
+		if ($lexer == "ascii") {
+			// TODO: use exec safe and catch exception
+			$ret = (new \libraries\ProcRunner(array('ansi2html', '-p')))
+				->input($content)
+				->forbid_stderr()
+				->exec();
+			// Last line is empty
+			$lines_to_remove = 1;
+		} else {
+			// TODO: use exec safe and catch exception
+			$ret = (new \libraries\ProcRunner(array('pygmentize', '-F', 'codetagify', '-O', 'encoding=guess,outencoding=utf8,stripnl=False', '-l', $lexer, '-f', 'html')))
+				->input($content)
+				->exec();
+			// Last 2 items are "</pre></div>" and ""
+			$lines_to_remove = 2;
+		}
+
+
+		$buf = explode("\n", $ret["stdout"]);
+		$line_count = count($buf);
+
+		for ($i = 1; $i <= $lines_to_remove; $i++) {
+			unset($buf[$line_count - $i]);
+		}
+
+		foreach ($buf as $key => $line) {
+			$line_number = $key + 1;
+			if ($key == 0) {
+				$line = str_replace("<div class=\"highlight\"><pre>", "", $line);
+			}
+
+			$anchor = "n$line_number";
+			if ($anchor_id !== false) {
+				$anchor = "n-$anchor_id-$line_number";
+			}
+
+			if ($line === "") {
+				$line = "<br>";
+			}
+
+			// Be careful not to add superflous whitespace here (we are in a <code>)
+			$output .= "<div class=\"table-row\">"
+							."<a href=\"#$anchor\" class=\"linenumber table-cell\">"
+								."<span class=\"anchor\" id=\"$anchor\"> </span>"
+							."</a>"
+							."<span class=\"line table-cell\">".$line."</span><!--\n";
+			$output .= "--></div>";
+		}
+
+		$output .= "</code></div>";
+		$output .= "</div>";
+
+		return array(
+			"return_value" => $ret["return_code"],
+			"output" => $output
+		);
+	}
+
+	public function highlight_file($output_cache, $filedata, $lexer, $is_multipaste)
+	{
+		// highlight the file and cache the result, fall back to plain text if $lexer fails
+		foreach (array($lexer, "text") as $lexer) {
+			$highlit = cache_function($filedata['data_id'].'_'.$lexer, 100,
+									  function() use ($output_cache, $filedata, $lexer, $is_multipaste) {
+				$file = $this->mfile->file($filedata['data_id']);
+				if ($lexer == "rmd") {
+					ob_start();
+
+					echo '<div class="code content table markdownrender">'."\n";
+					echo '<div class="table-row">'."\n";
+					echo '<div class="table-cell">'."\n";
+
+					require_once(APPPATH."/third_party/parsedown/Parsedown.php");
+					$parsedown = new Parsedown();
+					echo $parsedown->text(file_get_contents($file));
+
+					echo '</div></div></div>';
+
+					return array(
+						"output" => ob_get_clean(),
+						"return_value" => 0,
+					);
+				} else {
+					return $this->colorify($output_cache, $file, $lexer, $is_multipaste ? $filedata["id"] : false);
+				}
+			});
+
+			if ($highlit["return_value"] == 0) {
+				break;
+			} else {
+				$message = "Error trying to process the file. Either the lexer is unknown or something is broken.";
+				if ($lexer != "text") {
+					$message .= " Falling back to plain text.";
+				}
+				$output_cache->render_now(
+					array("error_message" => "<p>$message</p>"),
+					"file/fragments/alert-wide"
+				);
+			}
+		}
+
+		$data = array_merge($this->data, array(
+			'title' => htmlspecialchars($filedata['filename']),
+			'id' => $filedata["id"],
+			'current_highlight' => htmlspecialchars($lexer),
+			'timeout' => $this->mfile->get_timeout_string($filedata["id"]),
+			'filedata' => $filedata,
+		));
+
+		$output_cache->render_now($data, 'file/html_paste_header');
+		$output_cache->render_now($highlit["output"]);
+		$output_cache->render_now($data, 'file/html_paste_footer');
+	}
+
+
+}