Importing bits and pieces

This is the initial import based on a few files I had around.

includes/core/view.inc.php

@@ -0,0 +1,117 @@
+<?php
+
+interface View
+{
+	public function render( );
+}
+
+
+final class HTML
+{
+	protected $tag;
+	protected $attributes = array( );
+	protected $contents = array( );
+	protected $cached;
+
+
+	public function __construct( $tag )
+	{
+		$this->tag = $tag;
+	}
+
+
+	public function setAttribute( $attribute , $value )
+	{
+		if ( $value !== null ) {
+			$this->attributes[ $attribute ] = $value;
+			$this->cached = null;
+		}
+		return $this;
+	}
+
+
+	public function appendText( $text )
+	{
+		assert( is_scalar( $text ) );
+		array_push( $this->contents , HTML::from( $text ) );
+		$this->cached = null;
+		return $this;
+	}
+
+
+	public function appendElement( HTML $element )
+	{
+		array_push( $this->contents , $element );
+		$this->cached = null;
+		return $this;
+	}
+
+
+	public function appendRaw( $text )
+	{
+		assert( is_scalar( $text ) );
+		array_push( $this->contents , $text );
+		$this->cached = null;
+		return $this;
+	}
+
+
+	public function append( $auto )
+	{
+		if ( is_array( $auto ) ) {
+			foreach ( $auto as $element ) {
+				$this->append( $element );
+			}
+		} elseif ( is_scalar( $auto ) ) {
+			$this->appendRaw( $auto );
+		} else {
+			$this->appendElement( $auto );
+		}
+		return $this;
+	}
+
+
+	public function getCode( )
+	{
+		if ( $this->cached !== null ) {
+			return $this->cached;
+		}
+		$code = '<' . $this->tag;
+
+		if ( ! empty( $this->attributes ) ) {
+			$attrs = array( );
+			foreach ( $this->attributes as $name => $value ) {
+				array_push( $attrs , $name . '="' . $value . '"' );
+			}
+			$code .= ' ' . join( ' ' , $attrs );
+		}
+
+		if ( empty( $this->contents ) ) {
+			$code .= ' />';
+		} else {
+			$code .= '>';
+			foreach ( $this->contents as $item ) {
+				if ( is_scalar( $item ) ) {
+					$code .= $item;
+				} else {
+					$code .= $item->getCode( );
+				}
+			}
+			$code .= '</' . $this->tag . '>';
+		}
+
+		return ( $this->cached = $code );
+	}
+
+
+	public static function make( $tag )
+	{
+		return new HTML( $tag );
+	}
+
+
+	public static function from( $text )
+	{
+		return htmlentities( $text , ENT_COMPAT , 'UTF-8' );
+	}
+}