Initial Commit

dependencies/amphp/byte-stream/lib/LineReader.php

@@ -0,0 +1,59 @@
+<?php
+
+namespace WP_Ultimo\Dependencies\Amp\ByteStream;
+
+use WP_Ultimo\Dependencies\Amp\Promise;
+use function WP_Ultimo\Dependencies\Amp\call;
+final class LineReader
+{
+    /** @var string */
+    private $delimiter;
+    /** @var bool */
+    private $lineMode;
+    /** @var string */
+    private $buffer = "";
+    /** @var InputStream */
+    private $source;
+    public function __construct(InputStream $inputStream, string $delimiter = null)
+    {
+        $this->source = $inputStream;
+        $this->delimiter = $delimiter === null ? "\n" : $delimiter;
+        $this->lineMode = $delimiter === null;
+    }
+    /**
+     * @return Promise<string|null>
+     */
+    public function readLine() : Promise
+    {
+        return call(function () {
+            if (\false !== \strpos($this->buffer, $this->delimiter)) {
+                list($line, $this->buffer) = \explode($this->delimiter, $this->buffer, 2);
+                return $this->lineMode ? \rtrim($line, "\r") : $line;
+            }
+            while (null !== ($chunk = (yield $this->source->read()))) {
+                $this->buffer .= $chunk;
+                if (\false !== \strpos($this->buffer, $this->delimiter)) {
+                    list($line, $this->buffer) = \explode($this->delimiter, $this->buffer, 2);
+                    return $this->lineMode ? \rtrim($line, "\r") : $line;
+                }
+            }
+            if ($this->buffer === "") {
+                return null;
+            }
+            $line = $this->buffer;
+            $this->buffer = "";
+            return $this->lineMode ? \rtrim($line, "\r") : $line;
+        });
+    }
+    public function getBuffer() : string
+    {
+        return $this->buffer;
+    }
+    /**
+     * @return void
+     */
+    public function clearBuffer()
+    {
+        $this->buffer = "";
+    }
+}