First Local Commit - After Clean up.

Signed-off-by: Rick Hays <rhays@haysgang.com>

system/HTTP/Header.php

@@ -0,0 +1,239 @@
+<?php
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP
+ *
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014-2019 British Columbia Institute of Technology
+ * Copyright (c) 2019 CodeIgniter Foundation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package    CodeIgniter
+ * @author     CodeIgniter Dev Team
+ * @copyright  2019 CodeIgniter Foundation
+ * @license    https://opensource.org/licenses/MIT	MIT License
+ * @link       https://codeigniter.com
+ * @since      Version 4.0.0
+ * @filesource
+ */
+
+namespace CodeIgniter\HTTP;
+
+/**
+ * Class Header
+ *
+ * Represents a single HTTP header.
+ *
+ * @package CodeIgniter\HTTP
+ */
+class Header
+{
+
+	/**
+	 * The name of the header.
+	 *
+	 * @var string
+	 */
+	protected $name;
+
+	/**
+	 * The value of the header. May have more than one
+	 * value. If so, will be an array of strings.
+	 *
+	 * @var string|array
+	 */
+	protected $value;
+
+	//--------------------------------------------------------------------
+
+	/**
+	 * Header constructor. name is mandatory, if a value is provided, it will be set.
+	 *
+	 * @param string            $name
+	 * @param string|array|null $value
+	 */
+	public function __construct(string $name, $value = null)
+	{
+		$this->name  = $name;
+		$this->value = $value;
+	}
+
+	//--------------------------------------------------------------------
+
+	/**
+	 * Returns the name of the header, in the same case it was set.
+	 *
+	 * @return string
+	 */
+	public function getName(): string
+	{
+		return $this->name;
+	}
+
+	//--------------------------------------------------------------------
+
+	/**
+	 * Gets the raw value of the header. This may return either a string
+	 * of an array, depending on whether the header has multiple values or not.
+	 *
+	 * @return array|null|string
+	 */
+	public function getValue()
+	{
+		return $this->value;
+	}
+
+	//--------------------------------------------------------------------
+
+	/**
+	 * Sets the name of the header, overwriting any previous value.
+	 *
+	 * @param string $name
+	 *
+	 * @return $this
+	 */
+	public function setName(string $name)
+	{
+		$this->name = $name;
+
+		return $this;
+	}
+
+	//--------------------------------------------------------------------
+
+	/**
+	 * Sets the value of the header, overwriting any previous value(s).
+	 *
+	 * @param null $value
+	 *
+	 * @return $this
+	 */
+	public function setValue($value = null)
+	{
+		$this->value = $value;
+
+		return $this;
+	}
+
+	//--------------------------------------------------------------------
+
+	/**
+	 * Appends a value to the list of values for this header. If the
+	 * header is a single value string, it will be converted to an array.
+	 *
+	 * @param null $value
+	 *
+	 * @return $this
+	 */
+	public function appendValue($value = null)
+	{
+		if (! is_array($this->value))
+		{
+			$this->value = [$this->value];
+		}
+
+		$this->value[] = $value;
+
+		return $this;
+	}
+
+	//--------------------------------------------------------------------
+
+	/**
+	 * Prepends a value to the list of values for this header. If the
+	 * header is a single value string, it will be converted to an array.
+	 *
+	 * @param null $value
+	 *
+	 * @return $this
+	 */
+	public function prependValue($value = null)
+	{
+		if (! is_array($this->value))
+		{
+			$this->value = [$this->value];
+		}
+
+		array_unshift($this->value, $value);
+
+		return $this;
+	}
+
+	//--------------------------------------------------------------------
+
+	/**
+	 * Retrieves a comma-separated string of the values for a single header.
+	 *
+	 * NOTE: Not all header values may be appropriately represented using
+	 * comma concatenation. For such headers, use getHeader() instead
+	 * and supply your own delimiter when concatenating.
+	 *
+	 * @see https://www.w3.org/Protocols/rfc2616/rfc2616-sec4.html#sec4.2
+	 */
+	public function getValueLine(): string
+	{
+		if (is_string($this->value))
+		{
+			return $this->value;
+		}
+		else if (! is_array($this->value))
+		{
+			return '';
+		}
+
+		$options = [];
+
+		foreach ($this->value as $key => $value)
+		{
+			if (is_string($key) && ! is_array($value))
+			{
+				$options[] = $key . '=' . $value;
+			}
+			else if (is_array($value))
+			{
+				$key       = key($value);
+				$options[] = $key . '=' . $value[$key];
+			}
+			else if (is_numeric($key))
+			{
+				$options[] = $value;
+			}
+		}
+
+		return implode(', ', $options);
+	}
+
+	//--------------------------------------------------------------------
+
+	/**
+	 * Returns a representation of the entire header string, including
+	 * the header name and all values converted to the proper format.
+	 *
+	 * @return string
+	 */
+	public function __toString(): string
+	{
+		return $this->name . ': ' . $this->getValueLine();
+	}
+
+	//--------------------------------------------------------------------
+}